Method of recovery, collection, treatment and application of associated oil gas and system to this end

FIELD: oil-and-gas industry.

SUBSTANCE: set of invention can be used, primarily, at development of remote oil deposits under extreme climatic conditions. Proposed process comprises recovery of associated oil has (AOG) at locations of oil separation via multistage low-temperature separation of AOG to stripped gas (SG) and dry gas condensate of AOG. This process involves separate delivery of DSG and AOG gas condensate via pipeline to the points of their accumulation, treatment and application. Note here that they are delivered via pipes to mid stations of their accumulation, treatment and partial application. These stations are located at distances not exceeding several tens of kilometres from oil fields. SG is liquefied at mid stations to produce liquefied natural gas for supply to local consumers. AOG gas condensate is subjected to deeper drying and cleaning of sulphur and other harmful impurities. LNG and dry AOG gas condensate produced at mid stations are accumulated in separate storage tanks. These products are carried by, mainly, regional line aircraft fuel carriers to regional refineries. Said refineries produce automotive propane-butane fuel and aircraft condensed fuel for local consumers as well as stock for consumers of petrochemical products as wide fraction of light hydrocarbons. The latter are delivered to other regions by, for example, medium-range tanker aircraft.

EFFECT: higher efficiency owing to almost full recovery and application of associate oil gas.

2 cl, 3 dwg

 

The present invention relates to fuel-energy complex and can be used when developing oil and gas fields.

Known methods of development and complex equipment for testing oil and gas fields, including drilling in the field of oil or gas wells, extraction of oil or gas deposits, the recovery of oil or gas from wells using gas-field equipment, cleaning, dewatering and drying of oil or gas, and the collection and delivery of oil or gas via trunk oil and gas pipelines of high pressure centers and remote regions of consumption [1, 2]. These methods are based on piping systems conveying products production, are highly capital intensive and only effective in the development of large and highly productive hydrocarbon fields located in relatively accessible regions, on land or in coastal offshore areas, and close to the oil fields and pipeline transportation systems and corridors, capacious markets and consumers.

Known methods and systems equipment for testing gas fields with the use of the processes of liquefaction of natural gas is methane, the gas delivery to the regions and the centre�tram consumption in liquefied form, i.e., by converting a source of fuel (energy carrier) in a kind of intermediate product in the form of a cryogenic liquid with subsequent regasification this intermediate product is liquefied natural gas, carried out after delivery to the places of consumption of gas [3, 4]. However, these known technologies are combined in such a General notion of LNG technology is expensive and only effective in the development and operation of large gas fields and require very complex and expensive infrastructure to liquefy, transport, handling and storage of liquefied natural gas, as well as for his regasification.

A known way of transportation or storage of gas hydrates by putting the gas hydrate in a suitable vehicle or container during transportation or storage of gas hydrate in adiabatic conditions, obtained by isolation or cooling [5]. However, the known method is not linked to other links of the technological chain of production, processing and use of natural gas and does not by itself ensure the implementation of potential possibilities of increasing the efficiency of the gas business in market conditions.

The known method of extraction and transportation of natural gas from gas and marine gas hydrate deposits, including�ment gas production wells, it is recycled to the hydration state and transported to a mobile vehicle [6]. However, discrete - cyclical nature of the production process for the extraction and transportation of gas, embedded in the concept of this known method involving the sequential implementation stages of gas production and transportation, does not provide high performance and reduces the efficiency of the use of expensive equipment.

The known method and equipment complexes for the preparation of gas for transportation, including the step of compressing, cooling and separation (segregation) of gas on a gas component and gas condensate for subsequent pipeline transportation.

Known aviation condensed fuel (ASCT) consisting of hydrocarbon gases, mainly from propanoate components [11], and which the main components in the composition of associated gas. Also known dual-fuel helicopter that can run on aviation kerosene and cheaper and environmentally-friendly gas fuel type of fuel ASCT [11]. Today, however, the fuel ACCT not performed because there is in serial production and operation of aircraft, operating on gaseous fuel and dual-fuel helicopters of mass-produced, � particular, because there is no production of the fuel ASCT, to produce which is almost perfect feedstock is associated gas, large quantities of which, at least in Russia, is simply burned in flares in the field of oil separation due to the lack of cost-effective and efficient methods and equipment for recycling, collection, processing and utilization of APG in difficult conditions mining and exploitation of oil fields of Northern oil and gas provinces.

Closest to the proposed invention are a method and a set of equipment (installation) for the preparation of hydrocarbon gas to transport through its division through a two-stage compression scheme, cooling and separation unit for separating a mixture of hydrocarbon gases on the dried gaseous component and a "dry" gas condensate for pipeline transportation to the installation of subsequent processing to produce marketable products - RF patent №229793 [13] (prototype). However, the known method and installation are based solely on pipeline transport dry gas and gas condensate hydrocarbon gases requiring high initial capital costs have not been linked into a single system of recycling, collection, processing and use of hydrocarbon gas�, that does not provide the possibility of solving them such a severe problem as recycling and the use of associated petroleum gas (APG), particularly in harsh and remote conditions mining and exploitation of oil and gas deposits.

The purpose of the proposed invention is the provision of economically viable disposal, collection, recycling and utilization of APG at mining oil and gas fields in remote Northern regions with poor and costly transport infrastructure, while maintaining the balance of interests of economic entities at the regional and interregional level.

The technical result of the proposed invention is the reduction of the initial capital and operating costs for exploration and development of oil fields, as well as providing production and efficient use of cheaper and environmentally-friendly condensed gas motor fuels in the economy of the Northern regions through the utilization and processing of associated petroleum gas at oil and gas fields.

This object is achieved in that in the method of disposal, collection, recycling and utilization of associated gas, including its utilization in the field of oil separation by multi-stage low-temperature separation with the separation of dry otber�inanny gas methane and dry gas condensate, separate delivery of natural gas and gas condensate by pipeline to points of accumulation, processing and use, delivering stripped dry gas and gas condensate is carried out to the intermediate points of their storage, processing and partial use, which are placed at distances not exceeding a few tens of miles from the oil fields, in the intermediate points produce liquefaction stripped dry gas and production from liquefied natural gas methane for delivery to local consumers, and gas condensate is subjected to further drying and purification from sulfur and other impurities that received at the intermediate points of the liquefied natural gas and dry gas condensate accumulate in separate reservoirs-storages, where Autonomous means of transport, mainly aircraft regional aircraft with the help of tank containers or aircraft-tankers delivered at the regional gas processing plant, where the gas condensate, associated petroleum gas produced automotive or aviation propanolamine condensed fuel - ASCT for consumers at the regional level, as well as raw materials for consumers petrochemicals other Ryougi�new in the form of broad fraction of light hydrocarbons, brought over to other regions by means of interregional transport, for example, in the form of medium-haul aircraft container or aircraft carriers.

This goal is achieved also by the fact that the system that implements the proposed method and comprising oil-producing fields with a network of production wells, United precast pipe collectors with the collection and field processing of oil, technological equipment for the purification and separation of oil, small modular gas processing plant for the preparation of associated petroleum gas to pipeline transport by splitting it on dry stripped gas, methane gas and dry gas condensate other hydrocarbon gases included in the composition of associated petroleum gas, and gas processing plant for the production of associated petroleum gas liquid products in the form of automotive or aviation condensed propranololo fuel and broad fraction of light hydrocarbons for the petrochemical industry, is additionally provided with at least one oilfield intermediate point accumulation, temporary storage and processing of dry stripped gas to liquefied natural gas methane and pre-treatment and processing of dry gas condensate in Chi�will fetter the fraction of light hydrocarbons, having a weekend tank farm bulk terminal of liquefied methane gas and storage tank for accumulation and temporary storage of gas condensate, with the regional gas processing plant of the intermediate points is associated with at least one regional network of liquefied methane and at least one regional network of gas condensate for delivery of Autonomous vehicles, for example, in the form of helicopters or aircraft carriers, natural pressure or means of transport, for example, in the form of pipeline-container pneumatic conveying systems, and the output reservoir regional Park gas plant also has output channels for the shipment of liquefied methane and a broad fraction of light hydrocarbons for interregional shipments of these products.

The proposed method and system disposal, collection, processing and use of associated petroleum gas are illustrated by the illustrations shown in Fig. 1-3.

Fig. 1 shows: 1 - oil fishery with a network of production wells connected to a reservoir pipeline reservoir with paragraphs field treatment and separation-of-gassing oil 2 varying degrees of separation (BPS or CPS oil fields); 3 - core equipment to clear�and separation of oil; 4 is a compact skid-mounted plants which gas processing plant (MBGU) for preparation of associated petroleum gas to pipeline transport by separating APG dry stripped gas (DSG) and dry gas condensate hydrocarbon gases included in the APG; 5 - regional (oilfield) an intermediate point of accumulation, temporary storage, preliminary treatment and processing of dry and dry (drained) gas condensate; 6 - sweetening and deethanization of dry stripped gas (DSG); 7 - installation of deep cleaning and preparation of methane liquefaction; 8 - installation of the liquefaction of methane and receiving (production) liquefied natural gas (LNG); 9 - tank farm storage and intermediate storage of LNG output (bulk) terminal for LNG; 10 - demethanization plant used gas condensate APG; 11 - installation of purification from sulfur gas condensate; 12 - installation of deep cleaning and drying gas condensate APG; 13 - tank farm for storage and the temporary storage of gas condensate APG; 14 - regional gas processing plant (plant) - gas processing plant for the production of products with higher added value in the form of motor fuels and/or wide fraction of hydrocarbons (NGL) for subsequent deep gas and chemical processing; 15 - regional �transport network (subsystem) for the delivery of LNG to gas processing plant; 16 - regional transport network (subsystem) for delivery of gas condensate APG gas processing plant; 17 - output terminal for accumulation and temporary storage of LNG; 18 - receiving terminal for accumulation and temporary storage of gas condensate APG; 19 - the main process equipment of the regional gas processing plant for the production of automotive propanoate fuels and aviation condensed fuel (ASCT), and a wide fraction of light hydrocarbons (NGL) as a raw material for subsequent deep gas and petrochemical processing; 20 - tank farm output GPP with shipping terminals; 21 - system (network) inter-regional (distant) transport and delivery of products utilization and processing of associated petroleum gas to remote places of their consumption and further processing; D - pipeline (the pipeline) of dry stripped gas (DSG); P - pipeline (pipeline) dry (drained) gas condensate APG.

Fig. 2 shows: 11...1k- oil wells fields with teams of collectors (pipeline loops); 21-1...21-k- separation of oil and preparation of associated gas transportation in the oil fields (CSN and/or CPS oil fields); G1-Gk- pipelines (vasopro�odes) of dry stripped gas (DSG); P1-Pk- pipelines (pipelines) dry (drained) gas condensate APG; 5 - regional (oilfield) an intermediate point of accumulation, temporary storage, preliminary treatment and processing of dry and dry (drained) gas condensate; 14 - regional gas processing plant (plant) - gas processing plant for the production of products with higher added value in the form of motor fuels and/or wide fraction of hydrocarbons (NGL) for subsequent deep gas and chemical processing; 15 - regional transport network (subsystem) for the delivery of LNG to gas-processing plant; 16 - regional transport network (subsystem) for delivery of gas condensate APG gas processing plant and a 21 - system inter-regional (distant) transport and delivery of products utilization and processing of associated petroleum gas to remote places of their consumption and further processing.

Fig. 3 shows: 11...1m- oil-producing wells oil and gas fields with teams of collectors (pipeline loops); 211...2nm- cleaning and oil separation (CSN and(or) CPS fields and oil fields); G11...Gnm- pipelines (gas pipelines) of dry stripped gas (DSG); P11-Pnm- pipelines (pipelines)dry (drained) gas condensate associated gas; 51...5m- regional (commercial) intermediate points of accumulation, temporary storage, preliminary treatment and processing of SOG and dry gas condensate; 151...l5n- regional transport network (subsystem) for the delivery of LNG to gas-processing plant; 161...16n- regional transport network (subsystem) for delivery of gas condensate APG gas processing plant; 14 - regional gas processing plant (plant) for the production of products with higher added value in the form of motor fuels and/or wide fraction of hydrocarbons (NGL) for subsequent deep gas and chemical processing; 21 - system inter-regional (distant) transport and delivery of products utilization and processing of associated petroleum gas to remote places of their consumption and further processing.

System disposal, collection and use of associated petroleum gas is made as follows (Fig. 1). Mining hole oil field 1, as usual, are connected to precast pipe collector item oil transport 2 (booster pump station - CSN, or the centralized collection and preparation of oil - CPS) 2 that is running the main process equipment for the purification and separation of oil 3 and Malaga�Aetna modular gas processing plant (MBGU) 4 for the preparation of associated petroleum gas to pipeline transport by separating APG dry stripped gas (DSG) and dry (drained) gas condensate hydrocarbon gases included in the APG. In a relatively short distance from the points of separation of oil and preparation for transportation of APG 2, selected from considerations of the minimum cost of delivery, service opportunities nearby oil fields, the convenience of the location, operation, etc., setting up a regional (field) intermediate points of accumulation, temporary storage, preliminary treatment and processing of SOG and dry gas condensate 5, which connects the cleaning of oil and associated gas utilization 2 separate (parallel) pipeline G and U - a pipeline for SOG and pipeline for the drained condensate APG respectively. The pipeline for SOG has ducted gas for own needs of paragraph 2. Intermediate point 5 supply sweetening and deethanization of dry stripped gas (DSG) 6, the output of which is connected with the installation of deep cleaning and preparation of methane liquefaction 7 installation 8 liquefaction of methane and receiving (production) liquefied natural gas (LNG), connected to the output with tank farm storage and intermediate storage of LNG output (bulk) terminal for LNG export facilities. Intermediate point 5 also provide a demethanization plant used gas condensate APG 10, 11 and 12 for removing sulfur and deep OSSC� gas condensate APG, connected in series. After installation 12 also placed storage tank 13 for accumulation and temporary storage of gas condensate APG. Additional outputs of units 6 and 10 condensate and gas respectively connected to additional inputs of the units 7 and 11 respectively for gas and condensate. Tank farms for 9 LNG and gas condensate 13 intermediate of paragraph 5 is equipped with a liquid output device for further transport of these products, and storage tank for LNG 9 has an additional output for LNG supplies to local consumers that are in the area or near the location of an intermediate point 5.

The proposed system also includes regional gas processing plant (complex) - GPP 14 for the production of products with higher added value in the form of motor fuels and/or wide fraction of hydrocarbons (NGL) for subsequent deep gas and chemical processing of this valuable for the petrochemical industry raw materials. Gas processing complex 14 is placed as close as possible to local and regional consumers, but also taking into account the possibility and expediency of service other oil and gas fields in the region or oil and gas province. Intermediate point 5 connect (�anywayt) with GPP 14 regional transport networks (channels or subsystems) 15 and 16 for delivery to a gas processing plant LNG associated gas and condensate respectively. At the GPP 14 has a receiving terminal for accumulation and temporary storage of LNG 17, and a receiving terminal for accumulation and temporary storage of gas condensate APG 18. The outputs of these terminals are connected to the main technological equipment 19 regional gas processing plant 14 for the production of automotive propanoate fuels and aviation condensed fuel (ASCT), and a wide fraction of light hydrocarbons (NGL), as feedstock for subsequent deep gas and petrochemical processing. Regional GPP 14 also has a tank farm output 20 with shipping terminals products for regional consumption and includes some form of system 21 interregional (long) transport and delivery of products utilization and processing of associated petroleum gas to remote places of their consumption and further processing.

For the disposal and collection of associated gas within the region or province with the simultaneous development of many oil fields of the proposed system is performed in a hierarchical manner, as shown in Fig. 2, 3. The totality of working in the field or in the region of the oil fields to 1 (respectively figures 2 and 3), and thus the points of separation of oil "production" APG 2, the� a principle (for example, according to the principle of ownership of rights on mining location in the region, etc.) is divided into several groups, each of which includes k (k=1, 2, ...) a certain amount of the oil fields. For each group of oil fields select the most suitable location and settling regional (intra) sub-paragraph 5j(j=1, 2, ..., n) accumulation, temporary storage, preliminary treatment and processing of SOG and dry gas condensate to required APG production capacity. The number n of intermediate points, their relative positions and their production capacity are selected based on the characteristics of the developed oil fields and (or) oil and gas region or province. All oil fields of the group are connected with their intermediate points 5jwith the help of gas pipelines and product pipelines G1...Gkand N1...Pk(Fig. 2) and G11...Gnkand Nn1...Pnm(Fig. 3) respectively for dry gas and gas condensate, as well as respectively the cases of extraction by a group of several oil fields (Fig. 2) and working out of oil deposits of the region or province, a group of oil fields (Fig. 3). Each intermediate item 5jconnected to the regional gas processing compl�the csoma (plant) 14 of its regional transport network (channel or subsystem) 15 jand 16jfor delivery to a gas processing plant LNG associated gas and condensate respectively. For this reception terminals 17 and 18 regional GPP 14 are multichannel, and the production capacity of the main technological equipment 19, the tank farm 20 and means 21 of the system of inter-regional (distant) transport and delivery of products utilization and processing of associated petroleum gas are selected based on production volumes of oil and associated gas in all fields connected to the system as a whole.

Each regional transport network 15 and 16 connecting an intermediate point 5 and the gas processing plant 14, is realized (implemented) in the form of existing regional transport and distribution infrastructure by road, air or water transport using appropriate tank containers for transportation and storage of LNG and gas condensate, special pipeline-container pneumatic conveying systems (for large values of traffic), and universal cargo planes, container ships, aircraft carriers and regional airlines, including such non-traditional vehicles like hovercrafts, helicopters, tilt and other vehicles, for example off-airfield aircraft type flying�th plate", which do not require expensive in construction and maintenance of airfield infrastructure. Receiving storage tank 17 and 18, the main production equipment 19 and tank farm output 20 regional gas processing plant 14 is performed mainly on the basis of this commonly used spherical tanks and the LNG storage tanks and inert gases under pressure. Finally, inter-regional shipping and foreign transportation of products of processing of APG produced at regional GPP 14, via the output terminal 21 using the existing rail transport infrastructure and (or) water transport (if available), as well as medium-haul aircraft-ships and aircraft-tankers. The choice of a particular implementation of the regional transport networks 15 and 16, or combinations thereof is performed based on the techno-economic analysis and comparative evaluation of their advantages and disadvantages. The proposed method and system utilization, collection and use of associated petroleum gas are implemented and work as follows.

Example 1. Let a single oil field, located in the Northern region, where the utilization and processing of associated gas directly in the field of oil separation at neftepromysl�e is not economically justified by a sufficient distance from real consumers and complexities inevitably then emerging with the implementation of the products of APG processing in place, and the collection of associated gas and its delivery for processing to the places of use of the resulting product gas is extremely difficult due to the high propensity of the hydrocarbon gas to the hydrate formation at low temperatures and elevated pressures. Thus suppose there is also the situation when the distance to the nearest existing or planned regional gas processing plant and the volumes produced ("mined") at the oilfield associated gas are such that the construction of a separate pipeline to collect even prepared to pipeline transportation of APG is also not economically justified.

This situation often occurs in the Northern oil-rich regions of Russia, what makes for not only a large amount of flaring of associated gas on numerous flares, but also determines a very low efficiency even formally used volumes of APG. The described situation occurs, for example, and in the development of offshore oil fields located in seas of the Arctic ocean. The proposed system disposal, collection and use of associated petroleum gas with real�ized, as shown in Fig. 1. Directly at the field 1 in the field of oil separation 2 (BPS or CPS oilfield) standard means of purification and separation 3 is de-gassing of oil, and the resulting PNG is served here at the small modular gas processing plant " (MBGU) 4 providing for the separation of associated gas on a dry stripped gas (DSG) and dry (drained) gas condensate hydrocarbon gases included in the APG, the method of multi-stage low-temperature condensation.

Previously dehumidified gas is supplied by pipeline G (Fig. 1) at an intermediate point 5 and, if necessary, partially used for their own needs at the point of separation of oil and preparation to transport APG 2. Intermediate point on 5 installation 6 is detalizaziya gas (DLG) and its subsequent purification from the contained ethane, propane, butane and other heavier hydrocarbon compounds. With the methane output 6 gas is supplied to the installation of deep cleaning and preparation of methane liquefaction 7 connected to the methane liquefier LNG production 8. With the release of the latest liquefied natural gas (LNG) enters the storage tank 9 for storage, temporary storage, and the ability to supply LNG for the purposes of the local g�of sasabune.

Simultaneously drained gas condensate obtained in the item purification (separation) of oil and preparation of associated gas to transport 2, the product P (Fig. 1) is also fed to an intermediate point 6 in the demethanization plant used gas condensate APG 10, with a gas (methane) the output of which is here separated methane is supplied to an additional input of deep cleaning and preparation of methane liquefaction 7. With the installation of 10 dimmensional condensate associated gas is fed to the main input unit 11 for cleaning of gas condensate from sulphur. On the additional input unit 11 is also fed gas condensate from the unit 6, the process of geetanjali coz arriving at an intermediate point 5. Fully cleaned and deep gas condensate drained after installing 12 enters the tank farm for storage and the temporary storage of gas condensate 13, has an output terminal for shipment (loading) gas condensate APG.

With output terminals, tank farms 9 for 13 for LNG and gas condensate from the intermediate point 6 these products are served on the regional gas processing plant 14 regional transport networks 15 and 16 respectively for LNG and gas condensate. In the reservoirs 17 and 18 regional gas processing plant 14 however, there is a further�tion (accumulation) of LNG and gas condensate associated gas, respectively, and with the help of the main technological equipment 19 on this GEA made production (manufacture) of other types of marketable products, such as automobile propanolamine fuel and aviation condensed fuel (ASCT), is extremely necessary in the oil-producing regions and provinces, as well as a wide fraction of light hydrocarbons (NGL) for the supply of this valuable raw materials to the enterprises of petrochemical industry of other regions, including delivery (export) NGL to foreign markets. Thus accumulated in the tank farm 17 LNG is used as for the purposes of the local gas supply at the regional or interregional level and in the production of other types of products at the regional GPP 14.

Example 2. Let working out be distant enough large oil field, the development system which has several oil fields, but also has a few scattered and remote from each other points of preparation and separation of oil (DPS and CPS oil fields). Then the proposed system disposal, collection and use of associated petroleum gas sold in this form, as shown in Fig. 2. In this case, each of the points of separation of oil and preparation to transport APG 21...2kalso performed and funktioner�em the same way, as described above example 1. In addition, each of them is connected to an intermediate point 5 radially, as shown in Fig. 1, or by sequential linear scheme, with separate gas G1...Gkfor the collection of dry stripped gas (DSG) and pipelines P1...Pkfor gas condensate APG respectively. The intermediate item 6, as well as regional gas processing plant 14 run and work the same way, as in the case of example 1. Of course, they have consistent power output, and input and output channels of their tank farms and installations are executed multi-channel according to the number of separate groups of points of separation of oil and preparation of associated gas to transport. When radially connecting the points of separation of oil and preparation to transport APG 21...2k(Fig. 2) to the intermediate paragraph 6, the number of input and output channels in the respective tank farms of the intermediate paragraph 6 and regional GPP 14 must be equal to the number of groups or of paragraphs 2, that is just to be equal to the number k. In General and in the rest of the system works exactly the same as described in example 1.

Example 3. Let it be required to provide recycling, the collection and use of associated petroleum gas � oil and gas region or province with numerous relatively small oil fields, dispersed over a large area and remote from each other on a fairly long (from several dozen to several hundred and up to one or two thousands of kilometers) distances. A similar situation occurs, for example, in the Timan-Pechora oil and gas province of Russia. In this case (Fig. 3) the proposed system for the disposal, collection and utilization of petroleum supplied by several intermediate regional (intra) points accumulation, temporary storage, preliminary treatment and processing of SOG and dry gas condensate 5, which are connected with the cleaning of oil and associated gas utilization 211...2nmseparate (parallel) pipeline G11...Gnmand N11...Pnm- pipelines for SOG and product pipelines for the drained condensate APG, respectively, as described in the description of examples of implementation and operation of the system described above (examples 1, 2). Each of the intermediate regional points 51...5nalso associated with the regional gas processing plant 14 corresponding regional transport networks 151...15nand 161...l6nrespectively for the delivery of LNG and gas condensate derived from APG in the process of the proposed system. PR�production capacities of regional intermediate points 5 1...5n, transportation networks 151...15nand 161...16nand GPP 14 run (selectable) depending on the amount of traffic circulating throughout the system. In addition, receiving the input terminals tank farms GPP 14 are executed multi-channel according to the number of regional intermediate points 51...5n, that is, the number equal to the number of intermediate regional offices. The work of such a multilevel system of disposal, collection and use of associated petroleum gas remains the same as in the cases of its application, as described above in examples 1, 2.

Example 4. Let it be required to solve the problem of recycling and effective utilization of associated petroleum gas at oil field development, located offshore and operated usually with a special offshore platforms of one type or another. This situation from the standpoint of recycling and utilization of APG in fact, there is set forth in example 1. In this case, in the proposed system (Fig. 1) sub-paragraph 6 with all its devices placed on the offshore platform, which, as before, connect the transport networks 15 and 16 in the regional gas processing plant 14. If offshore oil field is located relatively close to the coast and the�th province (as, for example, the Prirazlomnoye field in the Pechora sea, 60 km from the village of Varandey), then the intermediate point 6 can be placed on land and is associated with an offshore platform underwater pipeline G for SOG and the pipeline P for gas condensate APG (Fig. 1). If desired, it can be located and the regional gas processing plant 14, i.e., an intermediate point 6 for accumulation and processing of SOG and condensate associated gas associated gas may simply be combined with the GPP 14. The work of the proposed system, however, remains the same as described above in examples 1-3.

Example 5. The proposed method and system for its implementation can also be used for testing remote small gas condensate fields, involvement in the development through the construction and operation of pipeline transportation systems for delivery of gas and gas condensate to the places of their processing and usage is notoriously unprofitable. In this case, mining (gas) well 1 (Fig. 1) connect points with pre-cleaning and preparation of production wells 2, including the main equipment for gas cleaning 3, and device 4, which, as in the previous cases, to make a separation of production wells in two separate streams of dry stripped gas(DSG) and dry gas condensate, some of which pipeline G and the condensate line P respectively served at an intermediate point of accumulation, temporary storage, preliminary treatment and processing of dry and dry (drained) gas condensate 5, which includes all the same equipment as in the previous cases described above in examples 1-4. Thus the intermediate point 5, as in example 4, can be combined directly with the item prior training 2 gas or to be located relatively close to last, but are more appropriate for various reasons. In other respects the proposed method and system for its implementation work the same way as described above in examples 1-4.

Literature

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1. The method of disposal, collection, recycling and utilization of associated gas, including its utilization in the field of oil separation by multi-stage low-temperature separation with the separation of dry stripped gas, methane gas and dry gas condensate, separate delivery of natural gas and gas condensate by pipeline to points of accumulation, processing and use, characterized in that the stripped gas delivery and gas�first condensation is performed to the intermediate points of their accumulation, processing and partial use, which are placed at distances not exceeding a few tens of miles from the oil fields, in the intermediate points produce liquefaction stripped dry gas and production from liquefied natural gas methane for delivery to local consumers, and gas condensate is subjected to further drying and purification from sulfur and other harmful impurities derived at the intermediate points of the liquefied natural gas and dry gas condensate accumulate in separate reservoirs-storages, where Autonomous means of transport, mainly aircraft regional aircraft with the help of tank containers or aircraft-tankers delivered at the regional gas processing plant, where the gas condensate, associated petroleum gas produced automotive or aviation propanolamine condensed fuel - ASCT for consumers at the regional level, as well as raw materials for consumers petrochemicals other regions in the form of broad fraction of light hydrocarbons, which are delivered to other regions by means of interregional transport, for example, in the form of medium-haul aircraft container or aircraft carriers.

2. System disposal, collection, recycling and utilization of petroleum ha�and, including oil fields with a network of production wells, United precast pipe collectors with the collection and field processing of oil, technological equipment for the purification and separation of oil, small modular gas processing plant for the preparation of associated petroleum gas to pipeline transport by splitting it on dry stripped gas, methane gas and dry gas condensate other hydrocarbon gases included in the composition of associated petroleum gas, and gas processing plant for the production of associated petroleum gas liquid products in the form of automotive or aviation condensed propranololo fuel, and a wide fraction of light hydrocarbons to petrochemicals, wherein the system is further provided with at least one oilfield intermediate point accumulation, temporary storage and processing of dry stripped gas to liquefied natural gas methane and pre-treatment and processing of dry gas condensate in a broad fraction of light hydrocarbons having an output tank farm bulk terminal of liquefied methane gas and storage tank for accumulation and temporary storage of gas condensate, and regional HAZOP�processing plant is associated with intermediate points at least one regional network of liquefied methane and at least one regional network of gas condensate for delivery offline vehicles, for example, in the form of helicopters or aircraft carriers, natural pressure or means of transport, for example, in the form of pipeline-container pneumatic conveying systems, and the output reservoir regional Park gas plant also has output channels for the shipment of liquefied methane and a broad fraction of light hydrocarbons for interregional shipments of these products.



 

Same patents:

FIELD: oil and gas industry.

SUBSTANCE: separator for intrafield oil treatment includes a horizontal body, heater, cross baffle, tubes for water-in-gas-and-oil emulsion inlet, tubes for gas, water and oil outlet. Horizontal cylindrical body is equipped with settler in the bottom part of the body with external heater. Hydrocarbon condensate input union is made perforated and placed above minimum level and below medium level of liquid in the separator, behind input union there is mesh baffle with size of mesh cells, behind the baffle there is criss-cross separating baffle with horizontal section that does not reach to the body at the top. Hydrocarbon condensate output union is made perforated at minimum level of liquid in the separator and output part above the medium level of liquid in the separator. At the body there is additional gas outlet union and gas plume outlet union, water drainage unions from the body and settler, union for safety valve, unions of level meters at the body and settler, unions of level meter indicators at the body and settler, union for thermometer, union for pressure gage, steaming union, a hatch, two saddle supports with support plate, at that one support is movable.

EFFECT: improved efficiency foe separation of water-in-gas-and-oil emulsion and eliminated loss of light hydrocarbons.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: plant for gas production out of a gas hydrate includes a gas production unit and a gas hydrate feeding unit. The plant comprises a reactor, a tank with water, a heater and a separator. In its upper part the reactor is equipped with a compressed gas export pipeline to consumers through the separator. The tank is connected to the reactor by a water feeding pipeline with a pump and a water discharge pipeline from the reactor in its lower part. The separator is equipped with a water and unreacted hydrate discharge pipeline. The device comprises additionally a system for cooling inner walls of the reactor, a fan, a receiver, a gas filter, a compressed gas consumer, a heat exchanger with channels for cold and hot carriers, a turbine expander with an electric generator, a choke valve, a liquid filter, a liquefied gas consumer, a breathing tap and a safety valve for the reactor cavity, stop and regulating valves and a gas cooling system in front of the turbine expander.

EFFECT: production of the high-pressure compressed gas and liquefied gas, provision of the plant operation due to its own energy resources, provision of the gas production mode with permanent pressure and flow rate.

9 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: method includes dispersion of wash water in oil emulsion in the pipeline with streamline conditions of oil emulsion at the pipeline site downstream the point of deemulsifier delivery. Delivery of wash water to the pipeline is made through disperser made as a tube installed so that it may be moved across the pipeline cross-section with opening at the end directed towards flow of oil emulsion. The ratio of wash water flow rate from the disperser and rate of oil emulsion in the pipeline is maintained within the range of (10÷12):(0.2÷0.5).

EFFECT: improved degree of dehydration and desalinisation, provision of dehydration and desalinisation at change in liquid level in the pipeline.

1 dwg

FIELD: mining.

SUBSTANCE: method for hydromechanical benefication involves drilling of production wells, water-jet destruction of a mineral deposit in extraction chambers of the deposit with its changer over to a movable state as a part of a hydraulic mixture, hydraulic lifting via the well to day surface from extraction chambers of the hydraulic mixture in the form of pulp, hydraulic transportation of pulp to a benefication place, and gravitational benefication of the mineral deposit in water medium. Destruction of the deposit is performed during formation of an extraction chamber with a vertical symmetry axis in the form of a rotation figure: cylinder, cone or ball, thus creating a circular flow of coal hydraulic mixture, which is swirled about the vertical symmetry axis, and depositing foreign heavy inclusions and sand at the bottom of the extraction chamber in the created hydraulic cyclone. Suction of coal hydraulic mixture is performed from the level above deposit level; turbulent hydraulic transportation of pulp from the extraction chamber to the place of its preparation for benefication is performed via pipelines. Hydromechanical treatment of pulp is performed so that a brown coal suspension is performed. Target products are obtained in the form of a concentrate of humic acids and a concentrate of bitumens by tangential supply of the flow of the brown coal suspension to a conical sedimentation basin, filling of the sedimentation basin with further settlement of the brown coal suspension and staged pumping-out of highly disperse fractions that are settled subsequently with their supply to different accumulation tanks for collection of target products and benefication tailings. The processing line implementing this method consists of three sections - borehole hydraulic mining, hydraulic transportation and benefication - subsequently dispersing brown coal till fineness.

EFFECT: implementation of staged production of target products.

4 cl, 2 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to the oil-and-gas industry and aims at the application of associated petroleum gas at oil separation sites and for extinguishing of flares. The proposed method comprises low-pressure second separation stage gas recovery by its feed to a fluid-gas ejector inlet and its compression by a portion of rejected high-pressure bottom water bled from discharge of a pump unit cluster and directed to the ejector working nozzle. Note here that the water-gas mix from the ejector discharge is directed to a settler top part for preliminary discharge of formation water while a gas chamber of the said settler is communicated with a gas chamber of the first stage separator.

EFFECT: higher efficiency of gas separation from oil at the first separation stage.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention is related to survey methods of gas and gas-condensate wells, identification of their optimal process modes, and namely to identification of maximum fluid recovery at minimum energy costs, that is minimum pressure losses at different modes of gas-liquid flow. The method includes separation of the well product, measurement of gas discharge and volume, acceptable solid and liquid phases during measurement of liquid phase under separation pressure and upon degasifying in a separate vessel. Measurement of wellhead pressure and temperature is made in several steady modes before stabilisation of the measured parameters at disposal of the separated phases. Measurement of liquid volume and mechanical impurities is made in sequence: in separation mode without pressure release of gas-liquid flow before separation, in separation mode with pressure release in contracting devices (chokes) before separation, in separation mode with pressure release in an ultrasound separator. Maximum volume of the separated liquid is indentified against measured values at minimum hydraulic loss of the gas-liquid mixture. The separated phases are mixed up with the separated gas flow in all separation modes Separation of the liquid-gas mixture is made by even distribution of the separated phases at vertical porous structure and subsequent discharge of the accumulated liquid from it. Gas and liquid flows are directed to product separation upon the mode of ultrasound separation.

EFFECT: expanding the area of well survey at extensive separation modes for gas-liquid mixtures.

6 cl, 1 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to analysis of gas and gas condensate deposits under various operating conditions. Proposed unit comprises gas-fluid mix separator and the device that follow: restrictor, separation product meter, pressure, temperature, gas flow and impurities meters and shutoff valves. This unit is arranged in carcass sized to carriers. Note here that separators and above mentioned devices are connected by pipes and include additional supersonic separator. Gas-fluid mix separator outlet is connected with supersonic separator outlet(s) while its purified gas outlet is connected with gas-fluid mix separator or purified gas discharge pipe.

EFFECT: decreased weight and sizes, accelerated preparation for measurements.

6 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: oil emulsion is used with temperature less than temperature of associated petroleum gas per 15-30°C, associated petroleum gas is introduced into oil emulsion pipeline under pressure bigger per 0.1-0.2 MPa than the pressure in the pipeline, mixture of oil emulsion and associated petroleum gas is transported through the pipeline with a rise of oil transportation path with length not less than 8 m under pressure of 0.25-0.40 MPa at temperature of 4-10°C, thereafter the mixture of oil emulsion and associated petroleum gas is delivered to separation.

EFFECT: increase in quantity of recovered heavy hydrocarbons from associated petroleum gas.

2 dwg, 1 ex

FIELD: oil and gas industry.

SUBSTANCE: method for treatment of interlayer emulsified oil in tanks and vessels for water and oil preparation includes placement of emulsified oil to a subsurface holding tank, dosing of oil solvent to the subsurface holding tank in the ratio from 1:100 up to 1:1 of the emulsified oil volume, pumping by a pump through a metering unit to the surface tank, delivery of demulsifying agent in dose of 50-5000 g/t at section from the pump up to the surface tank into the flow of pumped liquid by a dosing unit, heating the mix of emulsified oil, solvent and demulsifying agent in the heat exchanger, passage of the heated mix of complicated emulsified oil, solvent and demulsifying agent in the surface tank through the coiled heat exchanger, deflector of the liquid flow with layering into oil with solvent and water, separation of mechanical impurities, separate recovery of oil with solvent, water and mechanical impurities, delivery of oil with solvent depending on the permitted level of water content in crude oil flow for further preparation as per the conventional scheme at the oil preparation plant or for repeat treatment to the subsurface tank.

EFFECT: providing controlled process and increasing degree of emulsified oil layering.

1 dwg

FIELD: oil and gas industry.

SUBSTANCE: plant comprises raw stock feed pipeline, a separation unit that consists of at least two separation stages, and each stage has an inlet for raw stock and discharges for associated petroleum gas and hydrocarbon mixture with water as well as discharge for oil-water emulsion, at least two stages of gas compression with discharges for gas and liquid hydrocarbons released during gas compression, at that discharges for associated petroleum of separation stages gas are connected to the compression stages by the respective pressure while gas discharge at each compression stage is connected to discharge of associated petroleum gas at the previous separation stage, a gas membrane separation unit with discharges for pretreated gas and permeate connected to gas discharge at the first gas compression stage and a hydrocarbon stabilisation unit with gas discharges for stabilisation and liquid hydrocarbons, which is connected to the discharge of liquid hydrocarbons released at gas compression stages.

EFFECT: invention provides complete utilisation of associated petroleum gas, optimisation of the plant process flow and reduction of capital and operational costs.

27 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: according to the method a geologic structure is identified within the area of a deposit. Potential reservoir beds are identified in the section of rocks above the deposit, the direction of their highs - uprising and three-axis orientation of systems of subvertical fracturing is identified. Development and inspection wells are constructed with opening of the reservoir beds above the deposit height. Pressure and temperature survey is performed in the development wells and the composition of formation fluids is identified for all the wells. According to the results of the survey data depressurisation of the deposit is recorded. The inspection wells are constructed close to the wells intended for monitoring of sealing at the borehole annulus and the deposit in the direction of the subvertical fractures and uprising of the potential reservoir beds above the deposit. A change in pressure and temperature is identified for depth intervals of the reservoir beds on the real time basis.

EFFECT: reduced time for the detection of potential cross-flows of hydrocarbons to the above reservoir beds in result of the pressure failure in its cover and the borehole annulus of the wells in order to take measures on its elimination and prevention of potential blowouts to the surface.

1 dwg, 1 ex

FIELD: oil and gas industry.

SUBSTANCE: invention suggests hydraulic pump smart device for oil production and acquisition and storage of data from the well bottom that comprises jet pump unit, the lower isolation valve and unit with electronic instruments, which form a united and integrated unit actuated by operating fluid injected to the well from the ground oil lifting, closure of the well bottom, recovery of pressure in the formation and lifting of the device to the surface. The invention also discloses the method for oil production, receipt and recording of data from the well bottom using the above device.

EFFECT: performance of one complex function consisting in lifting of fluid and recording of data from the well bottom by means of temporary closure of the well.

17 cl, 11 dwg

FIELD: chemistry.

SUBSTANCE: method comprises drying a polymer solution until complete evaporation of water; heating the polymer formed after drying the polymer solution, and determining the temperature range of active decomposition of the polymer at a given heating rate, as well as the degree of decomposition of the polymer in said temperature range; drying, performing thermal analysis in the temperature range which includes the temperature range of active decomposition of the polymer, and calculating weight loss of a weighed amount of the sample of porous medium and a weighed amount of the same sample of porous medium after pumping the polymer solution; determining the weight concentration of the polymer that has penetrated the porous medium based on the obtained values.

EFFECT: high accuracy of the obtained data and rapid analysis.

6 cl, 3 dwg

FIELD: oil and gas industry.

SUBSTANCE: method involves destruction of massif of a hydrate-containing manifold with high-pressure water jets, formation from destructed material of pulp in a near-bottom volume covered with a dome, lifting of the pulp containing gas and gas-hydrate onto a floating structure via a pipeline and separation of the pulp into gas, water and solid material with gas transfer to a state suitable for transportation. According to the invention, massif of the hydrate-containing manifold is converted to a solid body-liquid fine suspension with gas-hydrate particle size of 10-20 mcm. For that purpose, it is influenced with high-pressure jets formed in the near-bottom volume covered with the dome. Besides, the volume of the pulp formed in this volume is treated with an ultrasound with parameters causing cavitation effects in it. A hydrate-containing suspension is formed with content in it of a disperse phase of gas-hydrate of up to 20-25%. Capacity of destruction devices of massif of the hydrate-containing manifold is controlled proportionally to pressure in the pipeline in its near-bottom section. An ice pulp formed at dissociation of the gas hydrate is used for cooling of compressed gas - a product of dissociation of a gas-hydrate pulp.

EFFECT: increasing well performance efficiency of a gas-hydrate deposit.

6 cl, 5 dwg

FIELD: oil and gas industry.

SUBSTANCE: according to the method in a watered part of a formation at first remedial cementing is made to cut the inflow of stratal water off and to isolate the watered part of the formation by a cement plug setting. A geophysical survey is performed in the non-watered part of the formation. Intervals are identified with bigger permeability of the productive formation areas. An assembly with an end-to-end channel is run in at the drill string and set by means of an anchor packer device. It is oriented towards one of the permeable areas of the productive formation. Mill equipment with a downhole drilling motor, flexible shaft and cutter is run in to the well at a flexible tube. An opening is cut in the production string wall with the use of an oil-based solution. The mill equipment is run out from the well. A jet nozzle is run in to the well up to a discharge outlet of the guide assembly. Cement stone and rock is washed out behind the production string so that a radial borehole is formed. The radial borehole treatment is made through the jet nozzle by an acid composition so that a cavern is formed. The flexible pipe with the jet nozzle is lifted out of the well. The guide assembly is rotated, for example, per 180 degrees and similar operations are performed to tunnel the next radial borehole. The guide assembly is lifted to the height of the next interval in the permeable areas of the productive formation and the similar operations are performed to tunnel the next radial boreholes. Up to the upper radial boreholes of the well an oil string is run in and the above string is made of tubing strings with the area of a clearance hole equal to the sum of all the clearance holes in the radial boreholes. The well is brought to operation.

EFFECT: improved efficiency of the method due to the removal of conditions for swelling of clays contained in the productive formation at tunnelling the radial borehole in low-permeable terrigenous deposits of water-swelling clays.

3 ex, 6 dwg

FIELD: oil and gas industry.

SUBSTANCE: according to the method a removable whipstock is installed. Then a window is cut in boring case. An offshoot is drilled from the main borehole. Offshoot drilling is made with running in of the boring case, its continuous cementing, perforation and provision of required reliability of attachment in the area of offshoot tracking. At that behind-the-casing flows of gas and liquid mixture are excluded. To this end upon window cutting a cement ring is cut in the boring casing and adjoining soil is cut as well in direction of offshoot drilling forming a cavern with diameter exceeding diameter of the offshoot. The cavern is poured with solid sealing compound and offshoot is drilled through the cavern. Downhole pumping equipment is placed in the main borehole and oil is extracted from the main borehole and offshoot.

EFFECT: increased oil extraction from offshoot at operated main borehole.

3 cl, 2 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention refers to the oil and gas industry and can be used in particular to prolong anhydrous operation conditions of oil producers. The substance of the invention: a device comprises a pipe string lowered into a well, a packer with a sealing member and a flow shutdown mounted therein; a hollow body comprises a pipe concentric with its axis. From above, this pipe is rigidly connected to the pipe string, and from below - to a piston. The pipe and piston are axially movable in relation to the hollow body from the flow shutdown. The hollow body from the flow shutdown is blind off from below; its holes are inclined at 120° to each other in three vertical planes along the perimeter of the hollow body. The first vertical plane comprises two holes above and below the sealing element of the packer, respectively. One hole is formed in the second vertical plane below the sealing element of the packer. The third vertical plane has one hole above the sealing element of the packer. The piston has a slot configured to provide an alternative connection of the holes of the vertical planes to the pipe inside when the pipe string and piston move axially and rotate about the hollow body of the flow shutdown. The hollow body of the flow shutdown is provided with an outer long slot inside from below, while the piston at the bottom has three inner long grooves inclined at 120° to each other along the perimeter; the outer long slot of the hollow body of the flow shutdown can be fixed in any of the three inner long grooves of the piston.

EFFECT: simplifying the operational structure of the device, improving its reliability and enhancing the same.

3 dwg

FIELD: oil and gas industry.

SUBSTANCE: invention refers to chemical and thermal treatment of a bottom-hole formation zone in developing high-viscosity oil deposits. A hollow cylinder rod is connected to a line of hollow pumping rods. A unit has also a working substance supply unit. This unit is stationary and isolated from a well production gathering line. An inside below an intake screen of the pump, between the cylinder wall and the surface of the hollow rod is divided into two sections. The cylinder rod is common for both sections and extends through a cylinder rod packing. The packing is provided between the sections. The bottom of the cylinder is connected to a tail piece with outlet holes. The tail piece comprises a hollow discharge rod. It is connected to the hollow rod of the pump. A non-return spring-loaded valve is arranged on the outlet of the hollow discharge rod of the pump.

EFFECT: unit comprises the differential sucker-rod pump, a cylinder of which is connected to a flow column; it ensures more reliable operation of the bore-hole sucker-rod pump unit and reducing serviceability.

1 dwg

FIELD: oil-and-gas industry.

SUBSTANCE: invention relates to recovery of said well located at multihorizon field. Proposed process comprises injection of isolating composition via well tubing string and fitting of "liquid" packer below tubing string shoe. Then, flow tubing above "liquid" packer is filled with killing fluid. Tubing string is withdrawn from the well. Deflector wedge is fitted inside tubing string. Lateral opening is cut in tubing string above overlaying high-pressure productive bed. Side hole is bored through said bed to extend through its entire depth to make side hole face occur nearby said high-pressure productive bed. Casing string with filter is lowered into bored side hole. Casing string is cemented above filter to the roof of top high-pressure productive bed and said wedge is withdrawn. Hanger with latch joint arranged at its inner surface is lowered on temporary string. Said hanger is fitted inside flow string under side opening. Oil string provided with side opening is lowered into flow string till interaction with latch device so that side openings of both strings are located opposite each other. Then, influx from lateral hole is initiated to remove killing fluid from the well. Then, liner with centring funnel at its shoe and packer hanger at its top is lowered on flexible pipe inside oil string to "liquid" packer. Solvent is injected via said liner. Said solvent destructs said "liquid" packer its residues falling on the face. Now liner is lowered to bottom holes of perforation interval of the bottom low-pressure productive bed. Liner is suspended in oil string above side opening of oil string. Flexible pipe is withdrawn from the well to place the well in operation.

EFFECT: efficient recovery.

7 dwg

FIELD: transport.

SUBSTANCE: method for installation of rapid-moving eduction column includes passing the rapid-moving column into a well, engagement of key for interaction with occlusion with nipple occlusion, extending interacting with profile key on rapid-moving column to interact with corresponding stopping profile in well shaft wall and thus supporting the rapid-moving column. In this method, interaction of the key with nipple occlusion causes extending the key interacting with profile into engagement with stopping profile.

EFFECT: higher reliability of holding the rapid-moving column while keeping relatively large flow diameter of the column.

29 cl, 8 dwg

FIELD: oil extractive industry.

SUBSTANCE: method includes lowering a tail piece into well with temperature, electric conductivity and pressure sensors placed on tail piece along its length. Pressure sensors are used in amount no less than three and placed at fixed distances from each other. After that, continuously during whole duration of well operation between maintenance procedures, temperature, conductivity of well fluid, absolute value of face pressure and difference of pressures along depth of well in area of productive bed are recorded. Different combinations of pairs of pressure sensors are used for determining special and average values of well fluid density. When absolute pit-face pressure is lower then saturation pressure for well fluid by gas and/or when average values of density deviate from well fluid preset limits and/or when its conductivity deviates from preset limits, adjustment of well operation mode is performed.

EFFECT: higher efficiency, higher safety.

2 cl

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