SU1494924A1 - Installation for pre-dehydrating of oil - Google Patents

Abstract

The invention relates to oil and gas production and can be used in oil and gas collection systems for separating water from oil directly at the well cluster and injecting it into injection wells. The purpose of the invention is to reduce metal consumption. The oil preliminary dewatering unit includes production wells 1, separator 3, sump 8 and reservoir pressure maintenance system 12, successively interconnected by an oil collector 21 and a gas collector 41 communicated with separator 3 and a sump 8. Oil collecting and gas collecting manifolds are connected to the hydraulic compressor 26 The separator and / or sump are connected to a heat and mass transfer device 33 or 34, which is connected to a hydraulic compressor 26 and a pump 25 to drive it. Hydraulic compressor pumps gas into an oil reservoir. Gas and oil are further transported together through a single pipeline. The working fluid for the compressor drive is the oil and water being processed. They, heated by the compressible gas, intensify the process of oil dehydration or water purification. Heat and mass exchangers serve to transfer heat from the working fluid of oil or water. The water separated from the oil is pumped into the reservoir to maintain reservoir pressure. Associated water gas from the suction well 13 is extracted by a hydraulically driven compressor 26 and is pumped into an oil collector 21 and utilized. 2 hp f-ly. 1 il.

Description

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The oil-collecting manifold 21 and the gas-collecting manifold 41 are connected to a separator 3 and a settling tank 8. The oil-gathering and gas collecting collectors are connected to a hydraulic actuator 26. A separator and (or) a settler are connected to a heat / mass transfer device 33 or 34, which is connected to a hydraulic driven compressor 26 and a pump 25 for driving it. Hydraulic compressor pumps gas into an oil reservoir. Gas and oil are further transported together through a single pipeline. The working fluid for the compressor drive is the processed oil and the hearth. They, heated from the compressible 1 ase, intensify the process of oil dehydration or water purification. To transfer heat from the working fluid, or oil, or water serves as heat and mass transfer material. The water separated from the oil is pumped into the reservoir to maintain reservoir pressure. The by-pass water gas from the water well 13 is extracted by a hydraulically driven compressor 26, pumped into the oil collector 21 and utilized. 2 hp f-ly, 1 ill.

The invention relates primarily to oil and gas production and can be used in oil and gas collection systems for separating water from oil directly at the well cluster and injecting it into injection wells.

The aim of the invention is to reduce metal consumption.

The drawing shows a diagram of an oil preliminary dewatering unit.

The installation consists of production wells 1, connected by pipeline 2 with separator 3 having gas 4, oil 5 and water 6 zones. All the zones 6 of the separator 3 are connected via a pipeline 7 with a sump 8, also having gas 9, oil 10 and water 11 zones. The reservoir pressure maintenance system 12 (PDP) includes a water well 13 with a gas zone 14 connected by a pipe 15 to an injection well 16. The water well 13 is drilled into the Cenomanian aquifer 17 and a high-pressure submersible water pump 18 is installed in it. A pump 20 is installed in the pipeline 19 to exit the oil from the separator 3 to pump the oil to the oil collector 21. The pipeline 23 connecting the sump 8 to the oil collector 21 is mounted to a pump 23 designed to pump oil from the oil zone 10 to the sump 8. On the loophole line 24 is installed in series with

25 and a hydraulically driven compressor 26. The looped pipe 24 between the outlet of the compressor 26 and the inlet to the pump 25 (in the direction of fluid flow) has two T1PTKI 27 and 28, equipped with valves 29 and 30.31 and 32. Moreover

27 is passed through the sump 8, and the thread 28 passes through the separator 3.

 In the water zone 1 1 of the settling tank 8 on the line 27 looped around the pipeline 24 and the oil zone 5 of the separator 3 on the line 28 of the looped pipeline 24 there are heat mas5 devices and 33 and 34 respectively. The heat and mass transfer device can be only one and placed either in the sump 8 or in the separator 3. In this case, the need for one of the strings 27 or

28 falls off.

There are several options for the location of the heat and mass transfer device, depending on structural and technological considerations, as well as taking into account the ease of maintenance of the installation.

A heat and mass transfer device is located inside the separator 3. Such a Q solution is advisable when it is necessary to preheat the oil for its deeper dehydration in the separator 3.

A heat and mass transfer device e is located inside the sump 8. In this case, the water is heated in the sump 8 in order to refine it and prepare it for injection into the formation.

A tei / gom with a compatible device is located both in the separator and in the sump. According to the technology, in this case, it is necessary to heat both the water and the oil.

Heat and mass transfer device is located outside the separator and sump. The connection of the heat and mass transfer device with the separator and the settling tank in such a case is carried out by means of pipelines either with the separator only, or only with the settling tank, or with both. Oil or ox will circulate through these pipelines between the heat and mass exchange device and the separator and / or the suction facility.

Preimu | (EU: your first three options before the last is the simplicity of the constructive implementation. The advantage of the latter over the others is the convenience of servicing the heat and mass exchange device.

The compressor 26 through its reception through pipelines 35-37 communicated respectively with 1 of the azov zones 9, A and 14 otstogshika 8, the separator 3 and the system 12 PPD. The discharge of the compressor 26 is connected to the oil-collecting manifold 21 by means of a pipeline 38, and a check valve 39 is installed on the boiler.

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Water zone 11 of the sump 8 pipe 40 communicated with the water well system 12 PPD.

The well 13 serves to feed the RPM system 12, since the volume of water flowing from well 1 to pump into well 16 is not enough (the direction of oil and flow is shown in the drawing by black arrows, the direction of gas is 6ejihiNfn, and the direction of flow of the gas-liquid mixture black and white arrow).

Heat and mass transfer devices 33 and 34 can be removed from the sump 8 and the separator 3 and connected with them through pipelines. In this case, the Heat and Mass Transfer Device may be one for both devices.

The pipes 35-38 interconnected form a gaseous collector 41.

The oil preliminary dewatering unit is mainly mounted on the oil well and operates as follows.

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The oil and gas pipeline to the mixture from the production windows 1 via pipeline 2 enters the separator 3, where it is separated into gas, oil and water, which occupy zones 4-6, respectively. Next, water with a low oil content through line 7 is fed to a sump

(Q 8, where it is finally cleaned of oil and mechanical impurities, but the pipeline 40 enters the water intake well 13 at the pump 18 intake. This water in the borehole 13 I I «5 is sewed with the Cenomanian water of the reservoir 17, is taken by the pump 18 and through pipeline 15 under Part 1 with a high pressure is pumped into the reservoir of the injection well 16 to keep the flow pressure maintained. The oil from the separator 3 and the sump 8 is pumped out by pump 20 and 23 to the oil collector 21 and transported to the central oil discharge station. From the sump 8

5, oil is pumped out periodically as it accumulates. The gas from the settling tank 8 of the separator 3 and the water well 13 through pipelines 35-37 is fed to receive hydraulic actuator

Q of compressor 26, is compressed to the pressure in the oil collection manifold 21, through line 38 through check valve 39 enters the oil gathering collector 21 and is transported to the DSP together with oil.

The hydraulic compressor 26 is driven by the pressure of the working fluid pumped by pump 25. Moreover, both water and oil can be used as the working fluid, depending on how the thread 27 or 28 is included.

For operation of the compressor 26 on the water, the circulation of the working fluid takes place along line 27 of the looped pipe 24. At the same time, the valves 29 and 30 are open, and the valves 31 and 32 are closed. Water from the water zone 11 of the settling tank 8 through the Heat and Mass Transfer Device 33 enters the looped coarse pipe 24, through the valve 30 is sucked by the pump 25 and is fed into the compressor 26 to drive it and simultaneously cool it. At the same time, the working fluid (treated water) is heated, cooling the compression chamber of the compressor 26. Subsequently, water is heated in a string 27

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Coc i aiiiiTr-l ii O. Ka: -A and Editor U. K, commander, A.ivpasuyi; Proofreader O. Gipls

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VNGO-IlI GSSUdarsl of the Penal Committee for H v.-yfijirTCHHnM and open gtri G KIT SSSR 113035, Moscow, 5, I a n d 4/5

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Claims (2)

Claim 1. An oil pre-dewatering installation, including production wells, a separator, a sump, and a reservoir pressure maintenance system communicated between each other, an oil pump, connected to an oil collector and a sump, a gas collector connected to a separator and a sump, and pipelines with a shut-off -re | Dopiruyuschim fittings, on the basis of the fact that, in order to reduce the metal consumption, the stringer is equipped with nass and hydro * with a water compressor connecting the oil gathering and ι tsosbo collectors, and the separator and (or) sump are supplied with heat with the connected device <<ί'ΐο >>, they are spellable: with: a compressor driven pump. 2. Installation according to g-1, g ”t l h a y! ·! and I'm with me. who is teplomasllp?! ·· 'another arrangement · ..' · according to the pl-r-po married VNugri ι-opar;) city'1 N (or) sump. Installing ns. P. 1, letting you do so. chts, for the purpose of a more nightly disposal of populated fat, .OiTKri for maintaining the plasto '..' That is why they are still connected to <gitsroprvt.odps'm). '·. · πηιοιΤ' ·?; ”’ Η, I will compile 0. Cap ι g if on