阅读说明：本技术 一种采油井伴生气凝液自动回收系统 (Automatic recovery system of associated gas condensate of oil production well ) 是由 侯宁 张洪军 肖红伟 章旭 王凯 周彦丽 孙浩 王振兴 巫得峰 杜小江 王世峰 于 2019-08-20 设计创作，主要内容包括：本发明提出一种采油井伴生气凝液自动回收系统,包括：气液分离罐,气液分离罐的侧壁上设置有进气口,进气口上连接有进气管,进气管与多个采油井的套气管相连通,气液分离罐的底部设置有出液口,出液口上连接有凝液汇管,凝液汇管通入采油井的油井套管中,气液分离罐的顶部设置有出气口,出气口上连接有通气管,通气管直接或间接连用气流程管线。本发明的采油井伴生气凝液自动回收系统可对采油井的伴生气中的凝液进行分离,降低了伴生气中凝液的含量,可避免供气管线在冬季冻堵或管线窜油炉膛发生火灾事故的风险。(The invention provides an automatic recovery system of associated gas condensate of an oil production well, which comprises: the gas-liquid separation jar is provided with the air inlet on the lateral wall of gas-liquid separation jar, is connected with the intake pipe on the air inlet, and the intake pipe is linked together with the cover trachea of a plurality of oil recovery wells, and the bottom of gas-liquid separation jar is provided with the liquid outlet, is connected with the lime set on the liquid outlet, and the lime set is joined in marriage in the oil well sleeve pipe of oil recovery well, and the top of gas-liquid separation jar is provided with the gas outlet, is connected with the breather pipe on the gas outlet, and the breather pipe is direct. The automatic recovery system for associated gas condensate of the oil production well can separate the condensate in the associated gas of the oil production well, reduces the content of the condensate in the associated gas, and can avoid the risk of fire accidents of an air supply pipeline during freezing and blocking or a pipeline oil channeling hearth in winter.)

1. An automatic recovery system of associated gas condensate of an oil production well is used for separating and recovering the condensate of the associated gas in an oil production well (1), and is characterized by comprising the following components: the gas-liquid separation tank (2), be provided with the air inlet on the lateral wall of gas-liquid separation tank (2), be connected with intake pipe (3) on the air inlet, intake pipe (3) are linked together with the cover trachea of a plurality of oil recovery wells (1), the bottom of gas-liquid separation tank (2) is provided with the liquid outlet, be connected with condensate collection pipe (4) on the liquid outlet, condensate collection pipe (4) let in the oil well sleeve pipe of oil recovery well (1), the top of gas-liquid separation tank (2) is provided with the gas outlet, be connected with breather pipe (5) on the gas outlet, breather pipe (5) directly or indirectly use gas flow way pipeline (6).

2. The associated gas condensate automatic recovery system of the oil production well according to the claim 1, characterized in that the condensate collecting pipe (4) is further connected with a casing gas gate (7), and the casing gas gate (7) and the condensate collecting pipe (4) are communicated with the well casing of the same oil production well (1).

3. The automatic recovery system of associated gas condensate of a production well according to claim 1, wherein the gas-liquid separation tank (2) comprises a plurality of stages of separation tanks, the gas inlet of a first stage of separation tank in the plurality of stages of separation tanks is communicated with the gas pipe of the plurality of production wells (1) through the gas inlet pipe (3), the gas outlet of the first stage of separation tank is communicated with the gas inlet of the next stage of separation tank through a vent pipe (5), and the gas outlet of the last stage of separation tank is connected with the gas flow line (6).

4. The automatic recovery system of associated gas condensate of a production well according to claim 3, wherein an associated gas inlet gate (8) is arranged on the gas inlet of the first stage separation tank, an outlet gate (9) is arranged on the gas outlet of the last stage separation tank, and a pressure gauge (10) is arranged on a vent pipe (5) between the gas inlet and the gas outlet between the multi-stage separation tanks.

5. The automatic recovery system of associated gas condensate of a production well according to claim 3, characterized in that the liquid outlets of the multistage separation tank are communicated with a same condensate header (4), and the condensate header (4) is communicated into the well casing of the production well (1).

6. The automatic recovery system of associated gas condensate of oil production well according to claim 1, wherein a plurality of condensing sheets (201) are provided in the gas-liquid separation tank (2), and the gas inlet opens directly below the condensing sheets (201).

7. The automatic recovery system of associated gas condensate of oil production well as claimed in claim 6, wherein the condensing sheet (201) is in a hopper shape, is transversely fixed in the middle of the gas-liquid separation tank (2), and has an edge close to the inner side wall of the gas-liquid separation tank (2).

8. The automatic recovery system of associated gas condensate of a production well according to claim 1, characterized in that a buffer tank is connected to the gas inlet pipe (3) between the gas inlet of the gas-liquid separation tank (2) and the casing gas pipe of the production well (1).

Technical Field

The invention belongs to the technical field of gas-liquid separation and condensate recovery of associated gas of an oil well, and particularly relates to an automatic recovery system for condensate of associated gas of an oil production well.

Background

The main force block of the Ansai oilfield development is a plug 160 block, and the original oil-gas ratio of an oil layer is 66.8m³And t, therefore, the associated gas is separated and separated out in a large amount along with the reduction of the pressure of the well bore while the crude oil is lifted to the ground by the oil well pump. Associated gas belongs to moisture, has high oil content and is a recyclable resource. The main equipment for gas-liquid separation of associated gas in the production field at present is a gas-liquid separator, which is used for introducing associated gas of a well group into a cylinder body for buffering and deposition, separating liquid from gas, discharging the liquid deposited at the bottom of a container at regular time, and heating the separated gas in a heating furnace or a tea furnace through a gas collecting pipeline. The deposited liquid mainly takes condensate oil as a main component, and belongs to flammable and explosive liquid, so that more safety risks exist in the processes of discharging, collecting and storing; secondly, condensate oil is discharged to a dirty oil pool, so that natural resources are wasted; thirdly, the liquid in the container is discharged at regular time by personnel, and if the liquid is not discharged in time, the condensate oil can flow into a burning furnace chamber along a gas supply line to cause fire accidents; and fourthly, when the temperature is too low in winter, some condensate oil and water can be condensed in the gas supply pipeline, so that the gas supply pipeline is easy to be frozen and blocked, the normal production operation is influenced, and the maintenance working intensity of staff is increased.

Disclosure of Invention

In view of the above, it is an object of the present invention to provide an automatic recovery system for associated gas condensate of a production well, which overcomes the above problems or at least partially solves or alleviates the above problems.

The invention provides an automatic recovery system of associated gas condensate of an oil production well, which is used for separating and recovering the condensate of the associated gas in the oil production well (1), and is characterized by comprising the following components: the gas-liquid separation tank is characterized in that a gas inlet is formed in the side wall of the gas-liquid separation tank, a gas inlet pipe is connected to the gas inlet, the gas inlet pipe is communicated with gas tubes of a plurality of oil production wells, a liquid outlet is formed in the bottom of the gas-liquid separation tank, a condensate collecting pipe is connected to the liquid outlet and is led into oil well casings of the oil production wells, a gas outlet is formed in the top of the gas-liquid separation tank, a vent pipe is connected to the gas outlet, and the vent pipe is directly or indirectly connected with a gas flow pipeline.

The invention also has the following optional features.

Optionally, the condensate collecting pipe is further connected with a casing gas gate, and the casing gas gate and the condensate collecting pipe are communicated with an oil well casing of the same oil production well.

Optionally, the gas-liquid separation tank comprises a plurality of stages of separation tanks, the gas inlet of a first stage of separation tank in the plurality of stages of separation tanks is communicated with the gas pipes of the plurality of oil production wells through the gas inlet pipe, the gas outlet of the first stage of separation tank is communicated with the gas inlet of a next stage of separation tank through a communicating pipe, and the gas outlet of the last stage of separation tank is connected with a gas flow pipeline.

Optionally, an associated gas inlet gate is arranged on an air inlet of the first-stage separation tank, an outlet gate is arranged on an air outlet of the last-stage separation tank, and a pressure gauge is arranged on a vent pipe between the air inlet and the air outlet between the multi-stage separation tanks.

Optionally, the liquid outlets of the multistage separation tanks are communicated with the same condensate header, and the condensate header is introduced into an oil well casing of the oil production well.

Optionally, a plurality of condensation sheets are arranged in the gas-liquid separation tank, and the gas inlet is introduced to the position right below the condensation sheets.

Optionally, the condensation sheet is in a shape of a hopper, and is transversely fixed in the middle of the gas-liquid separation tank, and the edge of the condensation sheet is close to the inner side wall of the gas-liquid separation tank.

Optionally, a buffer tank is connected to the gas inlet pipe between the gas inlet of the gas-liquid separation tank and the casing gas pipe of the oil production well.

The invention has the beneficial effects that:

according to the automatic recovery system for associated gas condensate of the oil production well, the gas casing pipe of the oil production well is communicated with the gas-liquid separation tank, condensate in the associated gas of the oil production well is effectively separated by utilizing the difference of gas and liquid gravity, the content of the condensate in the associated gas is reduced, and the risk of fire accidents of an air supply pipeline during freezing and blocking in winter or an oil channeling hearth of the pipeline can be avoided; by utilizing the height difference flow principle, the condensate flows into the annular space of the oil sleeve through the manifold and is pumped back to the oil collecting flow through the deep well pump, the yield of the oil well is successfully increased, and the waste of natural resources is reduced; by automatically recovering the condensate, the safety risk of the condensate in the associated gas of the oil production well in the processes of discharging, collecting and storing is successfully reduced, the management difficulty of the condensate is reduced, and the labor intensity of workers is reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of an embodiment of an automatic recovery system for associated gas condensate of a production well according to the present invention.

In the above figures: 1, producing oil wells; 2, a gas-liquid separation tank; 201 a condensation sheet; 3, air inlet pipe; 4, a condensate collecting pipe; 5, a vent pipe; 6 gas flow line; 7 sets of air gates; 8, an associated gas inlet gate; 9 an outlet gate; 10 pressure gauge; 11 condensate inlet gate.

The invention will be further explained in detail with reference to the drawings and the embodiments;

Detailed Description