The way to increase the efficiency of development gazokondensatnogo deposits in the region with poor transport infrastructure
(57) Abstract:The invention relates to the field of production of liquid and gaseous fluid from wells, and in particular to methods for the production of hydrocarbons with subsequent separation extracted from the wells of materials, and may find application in the field of preparation and transportation of hydrocarbons in the development of gas condensate and gazokondensatnyh fields. The technical result of the invention is the provision of a broad fraction of volatile hydrocarbons (C2+C3+C4in commercial products and delivering them to the consumer. This is achieved as follows. Extracted from the hive wells and collected locally paragraph layered gas-liquid mixture is cleaned from solid, liquid and gaseous impurities and separated into two phases: liquid (fraction C5and above or stable condensate) and gas (methane-butane fraction C1+C2+C3+C4). The liquid phase stabilized by degassing and pumped into the pipeline. The gas phase oosevelt and divided into methane (C1and a wide fraction of volatile hydrocarbons - NGL (fraction C2+C3+C4). Methane is injected into the trunk g is POTREBITEL methane-butane mixture, if necessary, into fractions and components. The present invention relates to the field of production of liquid and gaseous fluid from wells, and in particular to methods for the production of hydrocarbons with subsequent separation extracted from the wells of materials, and may find application in the field of preparation and transportation of hydrocarbons in the development of gas condensate and gazokondensatnyh fields.It is well known that extracted from reservoirs gazokondensatnogo field gas-liquid mixture (hereinafter SHC) consists of a wide range of gaseous and liquid hydrocarbons and solid, liquid and gaseous contaminants. To this mixture to allocate goods and deliver it to the consumer, stratiform SHC subjected to commercial processing (preparation), i.e. clear of solid, liquid and gaseous contaminants, divided into phases and fractions, then hydrocarbons obtained by known methods is transported to the consumer. The choice of method field treatment of gas and condensate for transport and transport is determined by a number of factors, the main of which are the geological, geographical and climatic conditions of the Deposit, the material composition of the current output of marketable products and provide high quality and low cost of hydrocarbons, consequently, its competitiveness on the domestic and foreign markets.In the literature quite extensively discussed the development of the gas condensate and gazokondensatnyh deposits (hereinafter - SCS field), extraction and processing of hydrocarbon raw materials, transport it to the consumer [1, 2]. Extracted and collected from a group of wells stratiform SHC clear of solid particles, water and other impurities. Then the methane-ethane mixture (fraction 1+ C2) is separated from the condensate, additionally cleaned from solid and liquid particles, dried and sent to the main pipeline. The condensate fraction C3and above) first advocated in the water separator, then passed through a special separators (to maintain the required pressure and is injected into the pipeline through which the condensate under its own pressure is transported to the consumer. In the absence of the field of condensate condensate delivered to the customer land (rail, road or water transport. To this end, the condensate is separated into a liquid phase (fraction C5and above, i.e., stable condensate) and gas phase (propane-butane Fraction C3sat through capacitors are directed to the storage tank, of which is filling tanks ground or water transport for delivery to the consumer.Set out the method of processing and transportation of hydrocarbons GKN Deposit has a significant drawback - a mandatory condition for its implementation is available on the fishery of condensate, or gas in the region should be sufficiently well developed transport infrastructure. However, not all these conditions. Suffice it to say that in Russia there are more than 300 GKN fields located in regions of unfavorable from the point of view of transport of hydrocarbons in industrial centers. For example, the group Vasyugan GKN fields in the Tomsk region (myldzhinskoe, North-Vasyugan and others) do not have a pipeline linking the field with consumers - Tomsk petrochemical plant and CHP-3. Construction of the pipeline Meljine-Tomsk length of 530-600 km would cost the Tomskgazprom about 400-500 million. US that in the current economic conditions is unrealistic. There is no possibility for delivery of condensate, Tomsk ground transport. This is due to the fact that the Northern districts of the region are strongly Zabolotny by also excluded, as available in the field area of a small river is navigable only 1-1,5 months out of the year.In this regard, "TomskNIPIneft" has developed the project of development of nylginskogo GKN field, the essence of which is as follows . This project and adopted us for the prototype. Extracted from well pads and collected on cluster collection point stratiform SHC handle on the complex gas treatment plants, treatment plants and installations differential separation of mixture components (UDSC). At these facilities by known technologies stratiform SHC clear of solid particles, water and other impurities and is divided into phases and fractions: liquid phase (fraction C5and above, or stable condensate), gas methane (C1) and fraction C2+ C3+ C4or a wide fraction of volatile hydrocarbons (hereinafter - NGL). After appropriate processing of stable condensate (fraction C5and above) is injected into the pipeline, and drained the gas (C1) served in the main pipeline and NGL in the field of pipeline and delivered to the consumer by land or water is pumped into reservoirs of the field.Obviously, a significant drawback of those is + C4) - energy fuels and valuable raw materials for the chemical industry. First, Tomskgazprom suffers huge losses from the fact that about 300 thousand tons of valuable hydrocarbons is withdrawn from commercial products. Secondly, the injection of LPG in reservoir deposits associated with significant energy consumption. Thirdly, in case of loss of unstable condensate in the well bottom hole in the liquid phase is sharply reduced the rate of producing wells, and these wells can completely stop issuing condensate.The task: in the absence of at GKN field of condensate, surface roads and waterways to ensure the inclusion of a broad fraction of volatile hydrocarbons (fraction C2+ C3+ C4in commercial products and delivering them to the consumer.This task is solved as follows. Extracted from the hive wells and collected on sectional collection point stratiform SHC clear of solid particles, water and other impurities and is divided into two phases - liquid and gaseous. The liquid phase (fraction C5and above) is subjected to degassing and pumped into the pipeline. The gas phase (methane-butane fraction C1+ C2+ C3 in the main pipeline. NGL drossellied in the same pipeline. When entering the consumer gas mixture is optionally separated into fractions and components.The order of implementation of the proposed technical solutions are shown in the following example. GKN field drilled bushes wells. Each of the bushes consists of six peripheral wells, revealing the reservoir in the corners of the hexagon, and one Central injection well. In the process of development of the producing wells is sampled formation of SHC, which trains arrives at the cluster Assembly point. Collected at the hive produced SHC is processed by the installation of complex gas treatment plant (GTP), where it is purified of solid, liquid and gaseous impurities and is divided into two phases: liquid (fraction C5and above or stable condensate) and gas (methane-butane fraction (C1+ C2+ C3+ C4). The liquid phase stabilized by degassing and pumped into the pipeline. The gas phase is additionally clear of solid and liquid particles, in particular from higher hydrocarbons, oosevelt with a dew point of water vapor below the minimum operating temperature, and a section of the od and NGL stabilize by throttling in the vortex tube and is served in the main pipeline (this method of stabilization is based on a vortex effect, described in the paper by A. P. Merkulova "Vortex effect and its application in engineering", M.: engineering, 1969). Received consumer gas mixture by low-temperature separation or absorption method is divided into methane (C1and NGL (fraction C2+ C3+ C4) or fraction methane-ethane (C1+ C2) and propane-butane (C3+ C4). If the gas mixture suitable for combustion in heat and power stations, it's faction is not divided.Compared with the prototype of the proposed solution has the following advantages:
without exception, all extracted from GKN deposits of hydrocarbons are commodity products that are delivered via pipeline;
excludes energy costs associated with pumping of liquids in the reservoir field;
increases the reliability and stability of production wells;
there is no need for the construction of the pipeline, which significantly reduces the financial, material, labor and other Preparation of natural gas and condensate for transport. M.: Nedra, 1968, S. 140.2. N. G. Sereda and other Satellites oilman and Gazovik. The Handbook. M.: Nedra, 1986, S. 288.3. The project pilot operation nylginskogo gazokondensatnogo field. Tomsk, "TomskNIPIneft", 1996, S. 363. The way to increase the efficiency of development gazokondensatnogo deposits in the region with poor transport infrastructure, which is extracted from wells and collected at the point of collection layered gas-liquid mixture is cleaned from solid, liquid and gaseous impurities and separated into a liquid phase (fraction C5and above) and gas phase (methane-butane mixture C1+C2+C3+C4), and the liquid phase rangatira and pumped into the pipeline, characterized in that the gas phase additionally oosevelt with a dew point of water vapor below the minimum operating temperature and separated into methane (C1and a wide fraction of volatile hydrocarbons (C2+C3+C4), while the methane is injected into the pipeline, and a wide fraction of volatile hydrocarbons stabilized by throttling in the pipeline through which the gas mixture Tran
FIELD: pipeline transport.
SUBSTANCE: power plant is additionally provided with a turbine expander provided with an electric generator. Power generated by the steam plant is directed to the main gas pipeline, and a part of power is directed to the turbine expander with electric generator to produce electric power.
EFFECT: enhanced reliability and efficiency.
1 cl, 1 dwg
FIELD: pipeline transport.
SUBSTANCE: method comprises intensifying extraction of low-pressure gas in tanks of oil stabilization due to rarefying gas in the inlet gas collector that connects the tank with the inlet of liquid-gas jet compressors by mixing the pumping product with active agent and increasing initial pressure of the low-pressure gas up to the pressure required by a consumer with simultaneous condensation of C5+ fraction. The gas-liquid mixture is supplied to the air cooling apparatus. After the separation of gas from the active agent, purifying and drying the compressed gas is intensified by supplying the compressed gas into the vortex pipe and, then, to the consumer.
EFFECT: improved method.
FIELD: oil and gas industry.
SUBSTANCE: device comprises device for enhancing and reducing pressure, receiving gas line for supplying the plant with the gas, discharging gas line through which the gas after purification is supplied from the plant, two vortex pipes, ejector, and condensate collector. The inlet of the first vortex pipe is connected with the receiving gas line and outlet of the cold gas flow of the second vortex pipe through the device for enhancing or reducing pressure. The output of the hot flow of the first vortex pipe is connected with the inlet of the first separator through the ejector, and the condensate outlet of the separator is connected with the inlet of the second vortex pipe. The outlet of the cold flow of the second vortex pipe is connected with the receiving gas.
EFFECT: enhanced quality of purification.
1 cl, 1 dwg
FIELD: preparation and transportation of petroleum associated and natural gases.
SUBSTANCE: invention relates to preparation of gas for transportation along gas pipeline and separation of heavy fraction condensate from gas. Proposed plant for preparation of petroleum associated gas or natural gas for transportation along gas pipeline and obtaining of liquid hydrocarbons from gas intake line, device to increase and decrease pressure, gas flow line, liquid hydrocarbons extraction line, three-circuit heat exchanger, separator, expansion valve, two regulating valves and swirl pipe whose input is connected through pressure increasing and decreasing device from one side with inlet gas line through first regulating valve and through series-connected second regulating valve and first circuit of heat exchanger, and from other side, with output of expansion valve. Output of cold flow of swirl pipe is connected through second circuit of heat exchangers with gas flow line, output of hot flow of swirl pipe is connected through third circuit of heat exchanger with input of separator whose condensate output is connected with line to remove liquid hydrocarbons, and gas output, with input of expansion valve.
EFFECT: increased degree of separation of condensate of heavy fractions of hydrocarbons from petroleum associated gas or natural gas designed for transportation along gas pipeline.
FIELD: the invention refers to energy-conservation technologies of pipeline transportation of natural gas.
SUBSTANCE: it may be used for controlling the technological process of the main pipeline with simultaneous selection out of gas of valuable ethane, propane, butane components. The technical result of the invention is reduction of energy inputs for maintaining pressure in the main pipeline, provision of stabilization of pressure in the main pipeline. The mode of transportation of natural gas along the main pipeline includes its feeding into the main pipeline on the first and the following compressor stations and giving out natural gas from the main pipeline through gas reducing stations and divide it on two flows one of them is directed into the pipeline of high pressure, and the other into a consumer pipe-bend. At that the gas of consumer pipe-bend is preliminary cooled and cleared from condensed and hard fraction, and then further cooling is executed till the temperature below the point of condensation of methane and division of cryogenic liquid and directed to the user, and out of received cryogenic liquid methane is separated from liquid ethane-propane-butane fraction which is returned into the pipeline of high pressure and further into the main pipeline, and detailed methane is directed into the pipe-bend. At that the gas in the pipeline of high pressure is preliminary additionally cooled, compremirated and returned into the main pipeline.
EFFECT: reduces power inputs.
7 cl, 1 dwg
FIELD: storage or transporting of natural gas.
SUBSTANCE: method comprises cooling natural gas down to a temperature below the temperature of the ambient air and transporting the cooled natural gas.
EFFECT: enhanced efficiency of storage and transporting.
16 cl, 13 dwg
FIELD: gas industry.
SUBSTANCE: method comprises separating the mixture into C1 methane fraction with subsequent supply to gas pipeline and C2+ hydrocarbon fraction that are preliminary stabilized by its liquefying by means of preliminary cooling down to a temperature at least 16°C and supplying to the gas pipeline. The pressure is maintained at a level no less than 3,2 MPa.
EFFECT: enhanced reliability of one-phase transporting.
FIELD: oil industry.
SUBSTANCE: supersonic tube comprises Laval nozzle, cyclonic separator with the blade, diffuser for discharging dried gas, and diffuser for discharging condensed liquid. The blade is made of deformed plate set in the screw groove made in the inner side of the cyclonic separator. The length of the plate is at least ½ of the pitch of the screw groove. The housing of the tube of the cyclonic separator receives locking members whose faces enters the screw groove. The distance between the adjacent locking members mounted in the screw groove is equal to the length of the plate.
EFFECT: enhanced efficiency.
FIELD: natural gas industry; other industries; production of the gas pipeline blowoff valves.
SUBSTANCE: the invention is pertaining to natural gas industry and is intended for blowing through of the gas pipelines. The technical result of the invention is the increased efficiency of usage of the gas pipeline blowoff valves at augmentation of the quantity of the delivered for utilization of the waste heavy hydrocarbon fractions of the natural gas for their additional condensation in the area of formation of the microswirlings between the exterior funnel-shaped and interior perforated conical walls. In the gas pipeline blowoff valve in the holes of the perforated conical wall there are the curvilinear grooves, which curvature is directed counterclockwise, and the curvature of the guiding vanes is made in the clockwise direction.
EFFECT: the invention ensures the increased efficiency of usage of the gas pipeline blowoff valves.
FIELD: gas conveyance means, particularly gas-main lines, gathering lines and manifolds of gas fields for condensate recovery.
SUBSTANCE: device to prevent condensate plug forming in pipeline comprises pipeline with inclined sections and connection elbows with enclosing channel. Discharge condensate pipe is formed in lower part of connection elbow. Condensate pipe is located in funnel-shaped enclosing channel and is connected to accumulation vessel located below ground freezing level. Condensate removal pipeline is installed in accumulation vessel so that the condensate removal pipeline is coaxially retained in vertical enclosing channel.
EFFECT: possibility to maintain thermal gas pipeline regime, which prevents condensate freezing, to remove accumulated condensate due to usage of steam condensation heat generated during condensation of steam present in conveying gas flow.