Method of oil-field development with recovery of refinery water drain and system for implementation thereof

FIELD: oil and gas industry.

SUBSTANCE: group of inventions refers to oil-refining and oil-producing industry, namely to drain recovery and flooding systems and keeping of formation pressure in oil-field development. The method involves oil production from various beds, keeping of formation pressure by injection of refinery mineralised water as a working substance in the beds. According to the invention, there is specified a group of injection wells striking the beds with the delivery chinks which have opened layers, containing local water of various physical and chemical properties and various reservoir features. Before injection of the working substance, physical and chemical properties of the working substance and local water are checked. Potential sediment formation is estimated and, as the case may be, the working substance flow is directed to the bed with minimum permissible sediment formation. In flow variation, the working substance is drained in the bed - an interlayer with high reservoir features. The device - system comprises the producing wells having struck the various beds, water conduits, pumps, a water source for injection in the bed for keeping of formation pressure, the injection wells having struck the beds containing local water with various physical and chemical properties and various reservoir features combined in a group with a general water conduit collector connected to a water drainage line for refinery discharge. According to the invention, the water conduit collector is provided with an analysis block of physical and chemical characteristics of the working substance, and the water conduits have flow switches. Said analysis block of physical and chemical characteristics of the working substance and switches are functionally interconnected through a computing and managing unit - controller for comparing physical and chemical characteristics of the working substance and local waters.

EFFECT: lower injectability loss of payout beds, and enabled recovery of refinery mineralized water drain.

2 cl, 2 tbl, 1 dwg

 

The proposal relates to the petroleum and oil industry, namely the disposal of sewage and flooding for the purpose of maintaining reservoir pressure at oil fields.

There is a method of developing oil fields (Gesloten. Collection and preparation of oil, gas and water. - M.: Nedra, 1974, - S), including the collection of production wells and transportation of its pumps booster pump stations (BPS) on the Central point for the collection and preparation of oil (LTP), which produce waste water, its treatment and subsequent injection pumps cluster pump stations (SPS) in the reservoir to maintain reservoir pressure maintenance (rpm).

The disadvantage of this method is that in the preparation of oil in it remains up to 1% water, which is transported together with the oil refinery), where after separation from the oil collection and treatment must be disposed.

The closest in technical essence and the achieved results to the present invention is the Method of disposal of waste oil products" (patent RF №2100046, IPC 01D 17/04. Publ. BI No. 36 dated 27.12.1997, including the collection of production wells, preliminary water discharge on the BPS and transportation of pre-dehydrated oil through a system of prefabricated pipelines on the LTP and the alley to the refinery for processing, the mixture of waste oil products from refineries injected into production wells before preparing oil or installation preliminary water (COC) system of collection and preparation of oil and subsequent processing at the refinery, and the excess water is transported in the reservoir pressure maintenance system.

This method allows to solve problems of environmental rehabilitation of areas of oil field development and the reduction of transport costs on the export of waste oil refineries and sewage disposal saline water refinery.

The disadvantage of this method is that because of the variability in time of the composition and water salinity refinery transported in the reservoir pressure maintenance system, by injecting it into the reservoir may be incompatible with formation waters, which will lead to sedimentation, clogging of the pore space of the reservoir and, consequently, to reduce injectivity of injection wells.

Known system development of an oil field (Gesloten. Collection and preparation of oil, gas and water. - M.: Nedra, 1974 - S)containing wells, booster pump stations, pipelines, GCHQ, tank equipment, installation of oil (oil), CND, allows the collection of production wells and transportation of its booster pumps on the LTP, which produce waste water, its treatment and subsequent injection pumps CND in PLA is t for TTD.

The disadvantage of this system is that the system does not provide a return into the reservoir (recycling) residual water obtained after oil refining in the form of sewage.

Closest to the technical essence and the achieved results for the proposed system is the development of the field described in "the Method of disposal of waste oil products" (patent RF №2100046, IPC 01D 17/04. Publ. BI No. 36 dated 27.12.1997 year), including production and injection wells, pipelines, booster pump station, oops, OTU, tanks and pumping equipment of the refinery, CND.

This system allows you to collect production wells, preliminary water discharge on the BPS and transportation of pre-dehydrated oil through a system of prefabricated pipelines on the LTP and next to the refinery for processing, the mixture of waste oil products from refineries injected into production wells before preparing oil or installation preliminary water (COC) system of collection and preparation of oil and subsequent processing at the refinery, and the excess water is transported in the reservoir pressure maintenance system.

The disadvantage of this system is that the system does not ensure the preservation of the injectivity of injection wells for disposal of effluent water refinery in the rpm system due to the variability of the composition and water salinity refinery, for injection in the reservoir falls OS the dock, clogging of the pore space of the reservoir.

The technical object of the present invention is to reduce the loss of injectivity of productive formations, increase the time between each execution of the bottomhole zone injection wells in the reservoir pressure maintenance system, disposal of saline wastewater from refineries with regard to their physico-chemical properties, and as a result, savings in material costs to maintain reservoir pressure.

The technical problem is solved by a method proposed development of an oil field with the utilization of waste water refinery, including the recovery of oil from reservoirs of different horizons, maintaining reservoir pressure by injection into the reservoir as a working agent mineralized water refinery.

What's new is that select group of injection wells, uncapped, containing formation waters with different physico-chemical properties and different reservoir properties, and before the injection of the working agent in control of physico-chemical properties of the working agent and brine, evaluate the possibility of precipitation and depending on the result of the flow of the working agent is directed into the reservoir with the minimum acceptable sedimentation, and in the period of change of flow of the working agent, assign to the layer (interlayer) with high reservoir properties of the mi.

The technical problem is solved by the proposed system development of an oil field with the utilization of waste water refinery, including production wells, uncapped different horizons, conduits, pumps, water source for injection into the reservoir to maintain reservoir pressure, injection wells, uncapped, containing formation waters with different physico-chemical properties and different reservoir properties, grouped by common water manifold connected to the line of drainage water discharged from the refinery.

What's new is that the water reservoir is supplied by a unit of analysis physico-chemical properties of the working agent and the water - flow switches, while the unit of analysis physico-chemical properties of the working agent and switches the flow of functionally linked via a computing and control unit (controller)comparing the physico-chemical properties of the working agent and brine.

The drawing shows a diagram of the method of development of an oil field with the utilization of waste water refinery and systems for its implementation.

System development of an oil field with the utilization of refinery waste water contains a group of producing wells 1, 2, 3, uncapped different horizons, injection wells is ins 4, 5, 6, uncapped, containing formation waters with different physico-chemical properties and different reservoir properties, the conduits 7, 8, 9, connecting the injection wells 4, 5, 6 respectively through the water collector 10 with the line of drainage water discharged from the refinery 11 (line drainage connects the sewage treatment equipment of the refinery 11 for cleaning sewage water, is located on the territory of the refinery 11 and the drawing is conventionally not shown). Water manifold 10 has a unit of analysis 12 physico-chemical properties of the working agent and the conduits 7, 8, 9 - switches threads 13, 14, 15, the block analyzer 12 physico-chemical properties of the working agent and thread switches 7, 8, 9 functionally linked via a computing and control unit 16. In addition, the water collector 10 is equipped with a pump 17. Threads represented in the drawing: I - oil supplied to the refinery 11, II - refined products that are sent to consumers, III - effluent water refinery for recycling. Dashed lines IV-VIII shows the functional relationship between the individual elements of the system.

Method development of an oil field with the utilization of refinery waste water through the system for its implementation perform the following way.

Production wells pipeline gathering systems to transport the booster pumps on the LTP, obasogie is t, rangatira, after which the treated oil with a residual water content of not more than 1% is transported to the refinery 11 (thread I) for processing. The resulting technological processes at the refinery 11 petroleum send consumers (stream II). Due to the fact that at the refinery 11 for processing receives oil from different oil fields, physico-chemical composition of recyclable waste water refinery 11 is changed. For the disposal of waste water resulting from a deep oil treatment for processing, select the injection wells or groups of wells 4, 5, 6, uncapped, containing formation waters with different physico-chemical properties and different reservoir properties, selection of injection wells or groups of wells 4, 5, 6 are produced so that the physico-chemical properties of produced water at different injection wells were different and allowed to dispose of the effluent water refinery 11 with varying physico-chemical properties, as well as a combination of physico-chemical properties of waste water refinery 11 with the physico-chemical properties of produced water one or more injection wells do not lead to excessive invalid precipitation and, consequently, clogging of the pore space of the reservoir. In addition, one or several n is greately wells (in the drawing - injection well 6) should open the reservoir with high permeability properties, allowing more compared with other injection wells, precipitation in the desktop agent. Line of drainage water (not shown) refinery 11 is combined with the water collector 10 and then by conduits 7, 8, 9 injection wells or groups of wells 4, 5, 6, respectively. When this water collector 10 equip the unit of analysis 12 physico-chemical properties of the working agent, which is functionally connected via a computing and control unit (controller)comparing the physico-chemical properties of the working agent and produced water, flow switches 13, 14, 15 (e.g., latches), located in conduits 7, 8, 9, respectively. The water flows refinery 11 (stream III)representing cleaned from mechanical impurities and oil particles mineralized water sent to the water reservoir 10 for disposal by injection as a working agent in injection wells or groups of wells 4 and/or 5 and/or 6, with the start of the injection of the working agent switches 13, 14 in conduits 7 and 8, respectively, are closed, the switch 15 to the conduit 9 is open. With the passage of waste water refinery 11 through the analysis block 12 produces rapid measurements of basic physical-chemical properties of RA is Otsego agent (salinity and ionic composition), then the information is sent via communication channels IV in the computing and control unit 16 (e.g., controller). In the computing and control unit 16 compares the information on the physico-chemical properties entering the water collector working agent with acceptable physico-chemical properties of the working agent for the opened injection wells or groups of wells 4, 5, 6 layers, defined in accordance with the project development of an oil field opened for production wells 1, 2, 3 horizons, which is responsive to injection wells 4, 5, 6, respectively (functional relationship V, VI, VII). If the physico-chemical properties of the working agent are acceptable for injection into injection wells or groups of wells, such as 4 and 6, but not acceptable for injection into another injection well or group of wells, for example 5, the computing and control unit 16 receives the command (VIII) to open the switch 13 to the conduit 7 and to close the switch 15 to the conduit 9, and the disposal of waste water refinery 11 will be produced in the injection well or group of wells 4. When the change of physico-chemical properties of the working agent in such a way that they become invalid glenaladale well or group of wells 4, but is it acceptable for injection wells or groups of wells 6, the computing and control unit 16 receives the command (VIII) to open the switch 15 to the conduit 9 and to close the switch 13 to the conduit 7, and the disposal of waste water refinery 11 will be produced in the injection well or group of wells 6 with high permeability properties opened its formation. With further change of physico-chemical properties of the working agent so that they become acceptable for injection wells or groups of wells 5 and is still illegal for injection wells or groups of wells 4, the computing and control unit 16 receives the command (VIII) to open the switch 14 to the conduit 8 and to close the switch 15 to the conduit 9, and the disposal of waste water refinery 11 will be produced in the injection well or group of wells 5. Similarly redirect flow III injection recyclable waste water refinery 11 in the injection well or group of wells 6 and then to the injection well or group of wells 4 when the change of physico-chemical properties of the working agent in the direction of the original values.

Thus, the proposed method of development is otci oil field effluent disposal refinery and system for its implementation to reduce the loss of injectivity of productive formations by injecting into them as a working agent recyclable effluent water refinery with regard to their physico-chemical properties and increase the time between each execution of the bottomhole zone injection wells in the reservoir pressure maintenance system.

An example of a specific implementation.

Production wells pipeline gathering systems to transport the booster pumps on the LTP, dehydrate, Tegaserod, after which the treated oil with a residual water content of not more than 1% is transported to the refinery 11 (thread I) for processing. The resulting technological processes at the refinery 11 petroleum send consumers (stream II). Due to the fact that at the refinery 11 for processing receives oil from different oil fields or horizons (layers), physico-chemical composition of recyclable waste water refinery 11 is changed. For waste generated in the process of preparing crude oil for processing waste water in the amount of 1200 m3for the day selected group of injection wells 4, 5, 6, uncapped different deposits of oil fields, containing formation waters with different physico-chemical properties and different reservoir properties. With each group of injection wells were selected based opportunities summarily disposed of daily volume of waste water refinery 11. The ionic composition of refinery wastewater 11 and brine groups of injection wells 4, 5, 6 given the in table 1.

Table
The ionic composition of water from the refinery wastewater and produced water injection wells
IndicatorsSolenocera
the following effluent refinery (mixture A)
Solenocera
the following effluent refinery (mixture B)
Solenocera
the following effluent refinery (mix In)
Produced water group nagn. SKUProduced water group nagn.
SKU
Produced water group nagn.
SKU
Density, g/cm30,9990,9991,168at 1,1381,1771,142
pH5,36,05,36,06.56,0
The ionic composition (mg/DM3):
K++Na+64,4106.172859,4 68560,079948,867235,2
CA2+to 59.664,116420,910621,218556,810661,2
Mg2+19,610,93522,62675,23891,23939,8
Cl-172,1209,2151033,3127304,6162247128964,2
The HCO3-12,221,397,6158,2of 21.286,8
SO42-108,3120,1730.1657,646,8905,6
Mineralization436,2244663,9209976,8264711,8211792,8
Fe (total)45,300088,70
H2S, mg/DM3079,70to 59.4065,1

The probability of formation of a precipitate in a mixture of refinery waste water 11 with formation waters in groups of injection wells are shown in table 2.

Table 2
The probability of formation of a precipitate in a mixture of refinery wastewater and produced water in groups of injection wells
1View waterCalcium carbonateCalcium sulfateThe iron sulfide
1Salt-containing wastewater refinery (mixture A) Produced water group nagn. SKU --+
2Salt-containing wastewater refinery (mixture B) Produced water group nagn. SKU---
3Salt-containing wastewater refinery (mixture) Produced water group nagn. SKU++-
4Salt-containing wastewater refinery (mixture A) Produced water group nagn. SKU---
5Salt-containing wastewater refinery (mixture B) Produced water group nagn. SKU--+
6Salt-containing wastewater refinery (mixture) Produced water group nagn. SKU+--

7Salt-containing wastewater refinery (mixture A) Produced water group nagn. SKU --+
8Salt-containing wastewater refinery (mixture B) Produced water group nagn. SKU---
9Salt-containing wastewater refinery (mixture) Produced water group nagn. SKU++-
Note: + the precipitate formed is the precipitate is not formed

As the pump 17 is installed pump unit CNS-63-1000, which have pumped effluent refinery with a capacity of 1200 m/day. The control of physico-chemical properties of the working agent is produced through the analysis block 12, and then the information is sent via communication channels IV in the computing and control unit 16 (e.g., controller). In the computing and control unit 16 compares the information on the physico-chemical properties entering the water collector working agent with acceptable physico-chemical properties of the working agent for the opened injection wells or groups of wells 4, 5, 6 layers, defined in accordance with the project development oil the CSO field opened for production wells 1, 2, 3 horizons, which is responsive to injection wells 4, 5, 6, respectively (functional relationship V, VI, VII). As can be seen from table 2, in the group of injection wells direct the mixture B, the group of injection wells 5 is sent to the mixture And the group of injection wells 6 allows you to take runoff water refinery 11 a, B and C with all specified physico-chemical properties.

Technical and economic efficiency of the proposed method of development of an oil field with the utilization of waste water refinery and systems for its implementation is achieved through the use of waste water refinery as a working agent in the system reservoir pressure maintenance, monitoring of physico-chemical properties of the working agent and inject it into the injection wells, uncapped with formation waters that mix with the waters of the refinery does not form sludge.

Use this proposal allows for a small additional capital cost by using the existing system of water injection to reduce the pickup of productive layers and increase the time between each execution of the bottomhole zone injection wells different pick-up and dispose of saline waters from oil refinery with regard to their physico-chemical properties, and how to achiev that, to save material costs for preparation of water for reservoir pressure maintenance and disposal of wastewater pumping plant.

1. Method development of an oil field with the utilization of waste water refinery, including the recovery of oil from reservoirs of different horizons, maintaining reservoir pressure by injection into the reservoir as a working agent mineralized water refinery, characterized in that select group of injection wells, uncapped, containing formation waters with different physico-chemical properties and different reservoir properties, and before the injection of the working agent in control of physico-chemical properties of the working agent and brine, evaluate the possibility of precipitation and depending on the result of the flow of the working agent is directed into the reservoir with the minimum acceptable sedimentation, and in the period of change flow of the working agent, assign to the layer - layers with high permeability properties.

2. System development of an oil field with the utilization of waste water refinery, including production wells, uncapped different horizons, conduits, pumps, water source for injection into the reservoir to maintain reservoir pressure, injection SLE the new well, uncapped, containing formation waters with different physico-chemical properties and different reservoir properties, grouped by common water manifold connected to the line draining water for discharge from the refinery, characterized in that the water reservoir is supplied by a unit of analysis physico-chemical properties of the working agent and the water - flow switches, while the unit of analysis physico-chemical properties of the working agent and switches functionally linked via a computing and control unit controller for comparison of physico-chemical properties of the working agent and brine.



 

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2 cl, 1 dwg

FIELD: sewage systems, particularly waste water cleaning systems.

SUBSTANCE: object (independent) sewage systems include mechanical cleaning device (cesspools) and biological cleaning devices (filters, filtration fields). Filtering devices of adjacent zones are hydraulically united in single filtering device to increase discharge volume and smooth discharge irregularity due to possibility to receive peak discharge volume from different objects in different time and due to increased filtration field area at the moment of waste water discharge from one object because of all filtering devices connection in single filtering device. Some zones may contain no filtering devices and waste water therefrom is supplied into adjacent zones.

EFFECT: possibility to smooth discharge irregularity and increased system capacity, decreased sanitary zones of filtering devices and, as a result, increased building density.

12 cl, 1 dwg

Sewage system // 2274709

FIELD: water supply and sewage systems, particularly for residential, public and industrial buildings.

SUBSTANCE: sewage system in accordance with the first embodiment comprises at least one lavatory pan and/or urinal and at least one sewage water receiver provided with discharge pipeline. The system also has accumulation vessel arranged over lavatory pan and/or urinal and communicated with the discharge pipeline of at least one sewage water receiver. Lower part of accumulation vessel has at least one outlet pipeline to communicate accumulation vessel with lavatory pan and/or urinal. If sewage water receiver connected with discharge pipeline and accumulation vessel is in room located on one level with room in which lavatory pan and/or urinal is installed fore accumulation vessel is arranged in discharge line of above sewage water receiver. The fore accumulation vessel interior is communicated with sewage water receiver and provided with exhaust pump having inlet connected with lower part of fore accumulation vessel interior and outlet linked with main accumulation vessel interior. Sewage system in accordance with the second embodiment comprises at least one lavatory pan and/or urinal with flushing tank provided with inlet valve arranged in upper part of flushing tank interior and connected to water supply system. Sewage system has at least one sewage water receiver provided with drainage pipeline and arranged in room, which is in one level with room having lavatory pan and/or urinal. The system is provided with accumulation vessel comprising exhaust pump having interior connected with drainage pipeline of at least one waste water receiver. Jet pump nozzle communicates with outlet part of inlet flushing tank valve. Mixing chamber communicates with lower part of accumulation vessel interior. Outlet part is connected with flushing tank interior.

EFFECT: possibility of household, industrial and atmospheric sewage water recycling and use for flushing lavatory pans and, as a result, reduced water consumption.

24 cl, 20 dwg

FIELD: domestic plumbing installations for fresh water or waste water, particularly to connect sewage pipes and odor seals.

SUBSTANCE: sewage pipe connector comprises inlet tubular part connected to the pipe and arranged upstream from the pipe to create inlet sewage water channel, outlet tubular part connected to the pipe and located downstream from it to create outlet sewage water channel and suppression part defining connection sewage water channel to create sewage water flow from inlet sewage water channel to outlet sewage water passage. The connector also has dividing tubular part, which forms dividing channel extending upwards from suppression section of the suppression part and dividing sewage water channel in upward direction at suppression section. Inlet and outlet tubular parts are located one opposite another and are coaxial one to another. Sewage water channel defined by suppression section is below the lowest part of adjacent sewage water channels. The connector additionally has dividing pipe connected to front end of dividing tubular part to enlarge the dividing channel in upward direction and lid detachably attached to the front end of dividing pipe for dividing channel sealing.

EFFECT: increased efficiency of odor suppression and prevention of outside odor spreading, possibility to regulate dividing channel height to compensate different depth of pipe laying.

4 cl, 4 dwg

FIELD: sanitary equipment, particularly toilet system.

SUBSTANCE: toilet system comprises lavatory pan, flushing device to supply flushing water, line connected to the lavatory pan and to sewage pipeline, means to convey pumped-out mass from lavatory pan to the line and sewage pipeline. The means comprise two valves and pressure chamber arranged in-between, wherein the valves and pressure chamber are arranged in line. Reduced pressure is created in pressure chamber to force the mass from lavatory pan and pressure inside pressure chamber is increased to convey the mass to sewage pipeline. Pressure chamber is made as piston cylinder and includes piston connected to drive means. The drive means move the piston to reduce or increase pressure inside the pressure chamber. The system also has electric control means to control the drive means and above valves so that when the mass is forced out of the pressure chamber the piston movement is performed along with bringing both valves in closed state to create reduced pressure inside the chamber. After that the first valve is rapidly opened to provide the mass inflow from lavatory pan into pressure chamber.

EFFECT: reduced water consumption, increased operational reliability and service life.

9 cl, 6 dwg

FIELD: water protection, particularly for prevention of water basin contamination with surface water received from agricultural lands.

SUBSTANCE: modular device comprises vertical partitions, which divide thereof into receiving, overflow and sediment chambers. Device includes several identical sections provided with partition chamber, clean water chamber, oil and floating rubbish gathering chamber and has filtering dam installed in intake channel bed.

EFFECT: simplified structure, increased cleaning efficiency.

2 dwg

FIELD: sewage system, particularly combination of engineering structures and sanitary procedures for collection and draining-off domestic sewage water concerned with day-to-day people activity in countryside.

SUBSTANCE: sewage system includes bath, lavatory pan, washing stand, collecting vessel and decomposition vessel with orifices for purified water discharge in ground. Gas relief valve and pipeline are arranged in upper part of decomposition vessel. Above vessels are made as metal drums. Located inside decomposition vessel is filter system. Orifices are drilled in lower part of decomposition vessel and arranged along the full vessel bottom perimeter. Fertilizers from decomposition vessel are removed through above valve. System has connection means formed as flexible couplers to link domestic sewage junctions with above system structures.

EFFECT: increased operational reliability, simplified structure, technology and maintenance, reduced cost.

1 dwg

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