阅读说明：本技术 一种油井井场伴生气密闭增压集输系统及其使用方法 (A kind of closed pressurization gathering system of oil well site associated gas and its application method ) 是由 王曼 慕立俊 石磊 郑刚 晏耿成 冯建设 程颢 杨海楠 于 2019-08-06 设计创作，主要内容包括：本发明涉及一种油井井场伴生气密闭增压集输系统及其使用方法,通过油气混合物进入井组汇管,然后进入缓冲罐和气液分离器进行第一次过滤和气液分离伴生气中液体组分,经过分离后的气液分离器内的伴生气进入密闭增压集输装置,经密闭增压集输装置处理后的伴生气输入外输管线,其中气液分离器及密闭增压集输装置内分离的液体均通过管线进入外输管线中,使用该伴生气密闭增压集输系统实现油田伴生气地面回收技术中伴生气全部密闭集输,同时本发明在伴生气密闭增压处理过程中,由于前端对油田伴生气进行了多次过滤和气液分离,避免了隔膜压缩机在压缩气体的过程中膜片破裂和阀座失效的问题,使得密闭集输系统可靠性更高。(The present invention relates to a kind of closed pressurization gathering system of oil well site associated gas and its application methods, enter well group header by gas mixture, liquid component in filtering for the first time and gas-liquid separation associated gas is carried out subsequently into surge tank and gas-liquid separator, the associated gas in gas-liquid separator after separation enters closed pressurization gathering and transporting device, external transport pipeline is inputted through closed pressurization gathering and transporting device treated associated gas, wherein gas-liquid separator and the closed interior liquid separated of pressurization gathering and transporting device pass through pipeline and enter in external transport pipeline, associated gas whole closed gathering in the recovery technology of associated gas ground is realized using the closed pressurization gathering system of the associated gas, the present invention is during associated gas closed pressurized treatment simultaneously, since front end be filtered for multiple times to associated gas and gas-liquid separation, diaphragm type compressor is avoided in compressed gas The problem of rupture of diaphragm and valve seat fail in the process, so that closed gathering system reliability is higher.)

1. a kind of closed pressurization gathering system of oil well site associated gas, it is characterized in that: including

Well group header (1), well group header (1) arrival end are connected to oil well site gathering line；

Surge tank (2), surge tank (2) arrival end are connected to by pipeline with the outlet end of well group header (1)；

Gas-liquid separator (3), gas-liquid separator (3) include arrival end, gas outlet and liquid outlet, the entrance of gas-liquid separator (3) End is connected to by pipeline with surge tank (2) outlet end；

Closed pressurization gathering and transporting device (4), one end going out by pipeline and gas-liquid separator (3) of closed pressurization gathering and transporting device (4) Port connection；

External transport pipeline (5), external transport pipeline (5) one end collect defeated by pipeline and the liquid outlet of gas-liquid separator (3) and closed pressurization The other end of device (4) is connected to, and external transport pipeline (5) other end carries out outlet；

Control module (6), control module (6) are connect by cable with closed pressurization gathering and transporting device (4).

2. the closed pressurization gathering system of a kind of oil well site associated gas according to claim 1, it is characterized in that: described is close Pressurization gathering and transporting device (4) is closed to include tertiary filter (7), produce into heat exchanger (8), inlet end surge tank (9), diaphragm type compressor (10), air cooler (11) and exhaust surge tank (12), described tertiary filter (7) one end pass through pipeline and gas-liquid separator (3) Gas outlet connection, tertiary filter (7) other end successively with produce into heat exchanger (8), inlet end surge tank (9), membrane compresses Machine (10), air cooler (11) and exhaust surge tank (12) serial communication, exhaust surge tank (12) also pass through pipeline and external transport pipeline (5) it is connected to.

3. the closed pressurization gathering system of a kind of oil well site associated gas according to claim 2, it is characterized in that: described three Grade filter (7), inlet end surge tank (9), diaphragm type compressor (10) and exhaust end surge tank (12) are provided with arrival end, go out Port and liquid outlet produce into heat exchanger (8) and air cooler (11) and are provided with air inlet and air outlet, the tertiary filter (7) Arrival end be connected to the gas outlet of gas-liquid separator (3) by pipeline, the gas outlet of tertiary filter (7) passes through pipeline and production Air inlet into heat exchanger (8) is connected to, and the liquid outlet of tertiary filter (7) is connected to by pipeline with external transport pipeline (5), the production It is connected into the gas outlet of heat exchanger (8) by pipeline with the arrival end of inlet end surge tank (9), inlet end surge tank (9) goes out Port is connected to by pipeline with the arrival end of diaphragm type compressor (10), and the liquid outlet of inlet end surge tank (9) is by pipeline and outside Defeated pipeline (5) connection, the gas outlet of diaphragm type compressor (10) are connected to by pipeline with the air inlet of air cooler (11), membrane compresses The liquid outlet of machine (10) is connected to by pipeline with external transport pipeline (5), and the gas outlet of air cooler (11) is slow by pipeline and exhaust end The arrival end connection of tank (12) is rushed, the gas outlet of exhaust end surge tank (12) and liquid outlet are connected to external transport pipeline (5).

4. the closed pressurization gathering system of a kind of oil well site associated gas according to claim 1 or 3, it is characterized in that: described Gas-liquid separator (3), tertiary filter (7), inlet end surge tank (9), diaphragm type compressor (10) and exhaust end surge tank (12) leakage fluid dram is by being also connected with check-valves on pipeline and the pipeline of external transport pipeline (5) connectivity part.

5. the closed pressurization gathering system of a kind of oil well site associated gas according to claim 2, it is characterized in that: described three Grade filter (7) is produced into heat exchanger (8), inlet end surge tank (9), diaphragm type compressor (10), air cooler (11) and exhaust buffering Tank (12) is connect by cable with control module (6).

6. the closed pressurization gathering system of a kind of oil well site associated gas according to claim 5, it is characterized in that: the control Molding block (6) uses PLC control module.

7. the closed pressurization gathering system of a kind of oil well site associated gas according to claim 1, it is characterized in that: described is outer Gas-liquid biphase flowmeter is provided on defeated pipeline (5).

8. a kind of application method of the closed pressurization gathering system of oil well site associated gas includes described in claim 1-6 any one A kind of closed pressurization gathering system of oil well site associated gas, it is characterized in that: the following steps are included:

Step 1: gas mixture is introduced into well group header (1), carries out the subsequently into surge tank (2) and gas-liquid separator (3) Liquid component in primary filtering and gas-liquid separation associated gas, the gas that gas-liquid separator (3) is isolated pass through pipeline from gas outlet Into closed pressurization gathering and transporting device (4), the liquid that gas-liquid separator (3) is isolated enters external transport pipeline by pipeline from liquid outlet (5)；

Step 2: in step 1, the gas that gas-liquid separator (3) is isolated is collected by pipeline into closed pressurization from gas outlet Tertiary filter (7) in defeated device (4) is filtered, the impurity in strainer removal associated gas in tertiary filter (7), so The liquid that tertiary filter (7) filters out afterwards is entered external transport pipeline (5) by pipeline, and the gas in tertiary filter (7) is from out Port, which enters to produce to exchange heat into heat exchanger (8) by pipeline, vaporizes part cryogenic liquid component, the gas after then vaporizing Enter liquid component in second of filtering associated gas of inlet end surge tank (9) progress, air inlet into the gas outlet of heat exchanger (8) from producing The liquid of end surge tank (9) filtering is entered external transport pipeline (5) by pipeline, and the gas in inlet end surge tank (9) enters diaphragm Compressor (10) is pressurized, and the liquid generated in diaphragm type compressor (10) enters external transport pipeline (5), membrane compresses by pipeline Pressurized gas enters air cooler (11) by pipeline and cools down in machine (10), and the gas after cooling enters row by pipeline Gas end surge tank (12), gas and liquid in exhaust end surge tank (12) pass through pipeline and enter external transport pipeline (5).

9. a kind of application method of the closed pressurization gathering system of oil well site associated gas according to claim 8, feature Be: described in step 2, tertiary filter (7) is produced into heat exchanger (8), inlet end surge tank (9), diaphragm type compressor (10), air cooler (11) and the temperature and pressure that are vented in surge tank (12) pass through control module (6) and are controlled, outer defeated pipe The output flow of line (5) is monitored by the gas-liquid biphase flowmeter connected on external transport pipeline (5).

Technical field

The present invention relates to associated gas recovery technology fields, and in particular to a kind of closed pressurization collection of oil well site associated gas Defeated system and its application method.

Background technique

Currently, oil field at home associated gas ground recovery technology mainly uses well head constant pressure valve gas collection to mix defeated, booster station oil gas Mix defeated, gathering station lighter hydrocarbons recovery etc..But it is ineffective to cause oil-gas mixed delivery pump to take gas since booster station oil and gas content is unstable, companion Anger can not achieve whole closed gatherings, therefore mixing defeated after being pressurized using diaphragm type compressor to associated gas is associated gas ground Collect a defeated new technology.

Diaphragm type compressor is usually only suitable for compression clean gas, have the characteristics that compression ratio height, it is closed do not reveal, and association Gas contains a small amount of impurity, contains liquid in normal temperature state, and lime set can be also generated in compression process, once liquid accumulation exists In air cavity, rupture of diaphragm, valve seat failure will lead to, in the serious curtailment diaphragm service life, diaphragm is largely assembled or even can also be made to liquid Compressor casing is cracked because building the pressure, and compressor is caused to can not operate normally.For this purpose, researching and developing a kind of oil well site associated gas Can closed pressurization gathering system and its application method remove impurity and liquid component, be applied to associated gas to the technology It is most important in the recycling of ground.

Summary of the invention

The present invention overcomes the deficiencies in the prior art, a kind of impurity except in associated gas, liquid are provided, realizes closed increasing The closed pressurization gathering system of purpose oil well site associated gas of pressure conveying associated gas, especially a kind of oil well site associated gas are closed It is pressurized gathering system and its application method.

Technical problem solved by the invention can be realized using following technical scheme:

A kind of closed pressurization gathering system of oil well site associated gas, including

Well group header, well group header arrival end are connected to oil well site gathering line；

Surge tank, surge tank arrival end are connected to by pipeline with the outlet end of well group header；

Gas-liquid separator, gas-liquid separator include arrival end, gas outlet and liquid outlet, and the arrival end of gas-liquid separator passes through Pipeline is connected to surge tank outlet end；

One end of closed pressurization gathering and transporting device, closed pressurization gathering and transporting device is connected by the gas outlet of pipeline and gas-liquid separator It is logical；

External transport pipeline, external transport pipeline one end pass through the liquid outlet of pipeline and gas-liquid separator and closed pressurization gathering and transporting device Other end connection, the external transport pipeline other end carry out outlet；

Control module, control module are connect by cable with closed pressurization gathering and transporting device.

The closed pressurization gathering and transporting device includes tertiary filter, produces into heat exchanger, inlet end surge tank, membrane compresses Machine, air cooler and exhaust surge tank, described tertiary filter one end are connected to by pipeline with the gas outlet of gas-liquid separator, three-level The filter other end is successively connected company with producing into heat exchanger, inlet end surge tank, diaphragm type compressor, air cooler and exhaust surge tank Logical, exhaust surge tank also passes through pipeline and is connected to external transport pipeline.

Tertiary filter, inlet end surge tank, diaphragm type compressor and the exhaust end surge tank be provided with arrival end, Gas outlet and liquid outlet produce into heat exchanger and air cooler and are provided with air inlet and air outlet, the arrival end of the tertiary filter It is connected to by pipeline with the gas outlet of gas-liquid separator, the gas outlet of tertiary filter by pipeline and produces the air inlet into heat exchanger The liquid outlet of mouth connection, tertiary filter is connected to by pipeline with external transport pipeline, and described produce into the gas outlet of heat exchanger passes through pipe Line is connected to the arrival end of inlet end surge tank, and the gas outlet of inlet end surge tank passes through the arrival end of pipeline and diaphragm type compressor Connection, the liquid outlet of inlet end surge tank be connected tos by pipeline with external transport pipeline, the gas outlet of diaphragm type compressor pass through pipeline and The air inlet of air cooler is connected to, and the liquid outlet of diaphragm type compressor is connected to by pipeline with external transport pipeline, and the gas outlet of air cooler is logical It crosses pipeline to be connected to the arrival end of exhaust end surge tank, the gas outlet of exhaust end surge tank and liquid outlet connect with external transport pipeline It is logical.

The row of the gas-liquid separator, tertiary filter, inlet end surge tank, diaphragm type compressor and exhaust end surge tank Liquid mouth is by being also connected with check-valves on pipeline and the pipeline of external transport pipeline connectivity part.

The tertiary filter is produced into heat exchanger, inlet end surge tank, diaphragm type compressor, air cooler and exhaust buffering Tank passes through cable and connect with control module.

The control module uses PLC control module.

Gas-liquid biphase flowmeter is provided on the external transport pipeline.

A kind of closed application method for being pressurized gathering system of oil well site associated gas includes one described in above-mentioned any one The kind closed pressurization gathering system of oil well site associated gas, comprising the following steps:

Step 1: gas mixture is introduced into well group header, carries out for the first time subsequently into surge tank and gas-liquid separator Liquid component in filtering and gas-liquid separation associated gas, the gas that gas-liquid separator separates go out are entered from gas outlet by pipeline closed It is pressurized gathering and transporting device, the liquid that gas-liquid separator separates go out enters external transport pipeline by pipeline from liquid outlet；

Step 2: in step 1, the gas that gas-liquid separator separates go out enters closed pressurization by pipeline from gas outlet Tertiary filter in gathering and transporting device is filtered, the impurity in strainer removal associated gas in tertiary filter, then three-level The liquid that filter filters out enters external transport pipeline by pipeline, and the gas in tertiary filter is entered from gas outlet by pipeline It produces to exchange heat into heat exchanger and vaporizes part cryogenic liquid component, the gas after then vaporizing is from the gas outlet produced into heat exchanger Liquid component in second of filtering associated gas is carried out into inlet end surge tank, the liquid of inlet end surge tank filtering passes through pipeline Into external transport pipeline, the gas in inlet end surge tank enters diaphragm type compressor and is pressurized, the liquid generated in diaphragm type compressor Body enters external transport pipeline by pipeline, and pressurized gas enters air cooler by pipeline and cools down in diaphragm type compressor, drop Gas after temperature enters exhaust end surge tank by pipeline, and the gas and liquid in exhaust end surge tank are entered by pipeline outer Defeated pipeline.

It is described in step 2, tertiary filter is produced into heat exchanger, inlet end surge tank, diaphragm type compressor, air cooler Pass through control module with the temperature and pressure being vented in surge tank and controlled, the output flow of external transport pipeline passes through outer defeated pipe The gas-liquid biphase flowmeter connected on line is monitored.

The beneficial effects of the present invention are:

Compared with prior art, the present invention passes through:

1, gas mixture enters well group header, and it is gentle filter for the first time subsequently into surge tank and gas-liquid separator Liquid separates liquid component in associated gas, and the associated gas in gas-liquid separator after separation enters closed pressurization gathering and transporting device, External transport pipeline is inputted through closed pressurization gathering and transporting device treated associated gas, wherein gas-liquid separator and closed pressurization gathering and transporting device Interior isolated liquid passes through pipeline and enters in external transport pipeline, realizes oil field association using the closed pressurization gathering system of the associated gas Associated gas whole closed gathering in the recovery technology of gas ground, while the present invention is during associated gas closed pressurized treatment, due to Associated gas be filtered for multiple times by surge tank 2 and gas-liquid separator 3 and closed pressurization gathering and transporting device 4 and gas-liquid Separation, the problem of avoiding diaphragm type compressor rupture of diaphragm and valve seat fail during compressed gas, so that closed gathering System reliability is higher.

2, it is for re-filtering by pipeline to enter tertiary filter for the gas that gas-liquid separator separates go out, then gas into Enter to produce to exchange heat into heat exchanger and vaporize part cryogenic liquid component, then produces into the gas in heat exchanger and enter back into inlet end Liquid component in surge tank secondary filter associated gas, the gas in inlet end surge tank enter diaphragm type compressor and are pressurized, and increase After gas after pressure is cooled down by air cooler, it is slow that the gas in air cooler after cooling enters progress pressure in exhaust end surge tank Punching, while carrying out except liquid, then the gas in exhaust end surge tank and liquid, which pass through pipeline and enters external transport pipeline, carries out outlet, Associated gas can be carried out to multiple filtering using the structure, wherein entire pipeline compression ratio can be made using diaphragm type compressor Greatly, wherein the admission pressure of diaphragm type compressor is not less than 0.1MPa, pressure at expulsion is not more than 3.0MPa, and diaphragm type compressor is closed It does not reveal, the liquid generated in tertiary filter, inlet end surge tank and diaphragm type compressor passes through pipeline and enters external transport pipeline Outlet is carried out, by tertiary filter, the setting into heat exchanger, inlet end surge tank is produced, is purified associated gas, avoids Diaphragm type compressor the problem of rupture of diaphragm and valve seat fail during compressed gas, extend the diaphragm service life.

Detailed description of the invention

Present invention will be further explained below with reference to the attached drawings and examples.

Fig. 1 is associated gas recovery process schematic diagram of the invention.

In figure: the closed pressurization gathering and transporting device of 1- well group header, 2- surge tank, 3- gas-liquid separator, 4-, 5- external transport pipeline, 6- control module, 7- tertiary filter, 8- produce into heat exchanger, 9- inlet end surge tank, 10- diaphragm type compressor, 11- air cooler, 12- exhaust end surge tank.

Specific embodiment