CN101915854A - Device and method for detecting sanding critical flow velocity of gas well - Google Patents
Device and method for detecting sanding critical flow velocity of gas well Download PDFInfo
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- CN101915854A CN101915854A CN 201010246404 CN201010246404A CN101915854A CN 101915854 A CN101915854 A CN 101915854A CN 201010246404 CN201010246404 CN 201010246404 CN 201010246404 A CN201010246404 A CN 201010246404A CN 101915854 A CN101915854 A CN 101915854A
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Abstract
The invention provides a device and a method for detecting the sanding critical flow velocity of a gas well. The device consists of an axial compression system, a gas supply system, a simulation system, a measuring and acquiring system and a sand processing system. The method comprises the following steps of: providing different supply pressure for the simulation system simulating the production state of the gas well by using the gas supply system; measuring parameters such as inlet pressure, outlet pressure, gas flow rate, sand production volume after a certain experimental time and the like to obtain the sanding critical flow rate through a test result; and combining the sanding critical flow rate with the rock core size to solve the sanding critical flow velocity. Thus, the technology for determining the sanding critical flow velocity of the gas well on site is provided. By adopting the device and the method of the invention, as the experimental conditions are similar to the geological conditions of gas pools, the problem of detecting the sanding critical flow velocity under the condition of open hole completion of the gas well is solved accurately, conveniently and economically, and an experimental evidence is provided for directing on-site production of the gas pools.
Description
Technical field
The present invention relates to a kind of test unit that is used to measure sanding critical flow velocity of gas well, the invention still further relates to the method for using this test unit.
Background technology
For the understressed sand gas reservoir, for improve gas well output certainly will will strengthen drawdown pressure, increase the flow velocity of rock gas in the gas well, thereby cause gas well shaking out in various degree.Along with the continuity of exploitation, sand output well is increasing, complicated, aggravation that the situation of shaking out also more becomes.Gas well shakes out and causes the production cycle to shorten, and output descends, even causes gas well to stop production, scrap, and has seriously restricted the performance of gas well potential, simultaneously winning apparatus, surface technology situation is worsened rapidly, has had a strong impact on the efficient stable yields in gas field.Therefore, have only the sanding critical flow velocity of accurate mensuration gas well, could provide foundation for rationally determining drawdown pressure and joining to produce.
The exploitation of present most of gas reservoirs, definite shortage reliable basis of sanding critical flow velocity.In recent years, the method for determining sanding critical flow velocity mainly contained site test, theoretical formula and shop experiment etc.Utilize the site test cost too high, and near wellbore formation is had certain injury; Utilize theoretical formula roughly to estimate, error is very big; Shop experiment adopts little rock core one dimension rectilinear flow displacement, representativeness not strong and truly radially seepage characteristic certain difference is arranged.Already used full-hole core radial penetration rate analyzer and the present invention have similarity, but its source of the gas is too little, can't make rock core reach sanding critical flow velocity, and the no filtration unit of outlet, can't differentiate whether shake out.Petroleum industry does not also form the device and method of ripe mensuration sanding critical flow velocity of gas well at present, therefore, in order rationally to determine drawdown pressure and to join product, is badly in need of a kind of device and method that is used to measure sanding critical flow velocity of gas well of development, to instruct produced on-site.
Summary of the invention
The object of the invention is to change not accurate enough, convenient, the economic present situation of present mensuration sanding critical flow velocity of gas well, a kind of test unit and method that is used for the indoor measurement sanding critical flow velocity of gas well is provided, the critical flow velocity of phenomenon to determine that gas well shakes out that shake out of simulation understressed sand gas reservoir gas well is for determining drawdown pressure and join to produce foundation is provided in the scene.
The technical solution adopted for the present invention to solve the technical problems is to have invented the device of measuring sanding critical flow velocity of gas well, and this device is connected to form by axial pressure system, gas supply system, simulation system, measurement and acquisition system, sand preparing system.Described axial pressure system is made up of storage tank 101, axial compression pump 102, axial compression control device 103, accurately Control Shaft is to loading velocity, pressure and time for axial compression control device 103, and the axial pressure system provides axial pressure for the full-hole core 308 of 305 clampings of core holding unit in the simulation system.Described gas supply system is made up of air pressure pump 201, high pressure tank 202, constant temperature and pressure device 203, and gas supply system provides the rock gas of steady pressure and enough source of the gas simulation gas reservoirs to supply with.Described simulation system is made up of autoclave 302, core holding unit 305, self-adhesion band 306, rubber gasket 307, full-hole core 308, rubber gasket 310, the production run under the simulation system simulation gas well open hole completion condition; Have piston 301, air intake opening 303, exhausr port 304 on the wherein said autoclave 302, described full-hole core 308 has rock core mesopore 309 but an end does not drill through; Described rubber gasket 310 apertures and rock core mesopore 309 equal diameters or big slightly.Described measurement and acquisition system are made up of inlet pressure gauge 401, delivery gauge 402, vortex precession flowmeter 403, data collecting card 404, data Output Display Unit 405, and measurement and acquisition system are carried out the collection and the preservation of pressure, data on flows.Described sand preparing system is made up of filtrator 501, high temperature baking box 502, electronic balance 503, the output sand that filtrator 501 filters in the full-hole core 308, and output sand oven dry after 502 pairs of cleanings of high temperature baking box, output sand is weighed after 503 pairs of oven dry of electronic balance.
The present invention also proposes to use the method for this mensuration sanding critical flow velocity of gas well device to comprise following steps:
1) on full-hole core 308 not perforate end faces, place rubber gasket 307, after utilize the seaming chuck of self-adhesion band 306 sealing full-hole core 308, rubber gasket 307 and core holding units 305; Full-hole core 308 perforate end faces are placed down rubber gasket 310, after utilize self-adhesion band 306 sealing full-hole core 308, rubber gasket 310 and core holding unit 305 push-down heads;
2) open autoclave 302, the core holding unit 305 of clamping full-hole core 308 is put into autoclave 302, close autoclave 302;
3) start axial compression pump 102, by axial compression control device 103 axial pressure to set pressure;
4) start gas supply system, regulate intake pressure to set pressure, and keep certain hour by constant temperature and pressure device 203;
5) start measurement and acquisition system, write down intake pressure, top hole pressure, rate of discharge automatically;
6) close source of the gas, measurement and acquisition system behind the certain hour, unload filtrator 501, sand sample in the filtrator 501 is cleaned, record data are weighed in oven dry;
7) reconnect filtrator 501, start and measure and acquisition system, strengthen intake pressure and continue test;
8) repeating step 6 and step 7 strengthen gas feed pressure step by step, as full-hole core 308 sand production rates/gas flow＞0.001g/m
3The time, stop test.
Adopt the present invention to measure the device and method of sanding critical flow velocity of gas well, solved the sanding critical flow velocity problem of measuring under the understressed sand gas reservoir gas well open hole completion condition, for rationally determining drawdown pressure and join to produce foundation is provided in the scene.
Description of drawings
Fig. 1 is apparatus of the present invention synoptic diagram;
Fig. 2 schemes over time for intake pressure, top hole pressure, the flow of the certain hour gathered in the specific embodiment of the invention.
Embodiment
Below in conjunction with the drawings and specific embodiments the device and method that the present invention measures sanding critical flow velocity of gas well is further elaborated.
As shown in Figure 1, axial pressure of the present invention system is connected to form by high pressure line by storage tank 101, axial compression pump 102, axial compression control device 103, its axial compression control device 103 accurately Control Shaft to loading velocity, pressure and time.Gas supply system is connected to form by high pressure line by air pressure pump 201, high pressure tank 202, constant temperature and pressure device 203, mainly provides the rock gas of steady pressure and enough source of the gas simulation gas reservoirs to supply with.Simulation system is made up of autoclave 302, core holding unit 305, self-adhesion band 306, rubber gasket 307, full-hole core 308, rubber gasket 310; Wherein have piston 301, air intake opening 303, exhausr port 304 on the autoclave 302, the axial pressure system carries out axial pressure by the full-hole core 308 in 301 pairs of autoclaves of piston 302; Gas supply system is connected with air intake opening 303 by high pressure line.Measure and acquisition system is connected to form by data line by inlet pressure gauge 401, delivery gauge 402, vortex precession flowmeter 403, data collecting card 404, data Output Display Unit 405; By data collecting card 404 and output of computer interface image data and preservation.Sand preparing system is made up of filtrator 501, high temperature baking box 502, electronic balance 503, collects the sand production rate of rock core from filtrator 501, and with 502 oven dry of high temperature baking box, record data are weighed in the back with electronic balance 503.
Full-hole cores 308 in the autoclave 302 as shown in Figure 1 need carry out the processing of full-hole core sample before the test, and brill rock core mesopore 309 but an end do not drill through; Its not perforate end face is placed rubber gasket 307, after utilize the seaming chuck of self-adhesion band 306 sealing full-hole core 308, rubber gasket 307 and core holding units 305; Full-hole core 308 perforate end faces are placed rubber gasket 310 with holes, rubber gasket 310 apertures and rock core mesopore 309 equal diameters or big slightly, after utilize self-adhesion band 306 sealing full-hole core 308, rubber gasket 310 and core holding unit 305 push-down heads.Open autoclave 302 during test, the core holding unit 305 of clamping full-hole core 308 is put into autoclave 302.
The test method of measuring sanding critical flow velocity of gas well is as follows: need carry out the processing of full-hole core sample before the experiment, bore rock core mesopore 309, grinding two end surfaces is disposed in the rock core mesopore 309 because the residual sand of boring; Core holding unit 305 clamping full-hole cores 308 utilize rubber gasket 307, self-adhesion band 306, rubber gasket 310 to put into autoclave 302 after sealing; Start the axial compression system according to preset pressure, stable back starts gas supply system and measures acquisition system, gathers intake pressure, top hole pressure, gas flow automatically; Stop gas behind the certain hour and supply with, sandstone in the de-entrainment filter, and dry, weigh, record data; Reconnect filtrator, strengthen the intake pressure test, as full-hole core 308 sand production rates/gas flow＞0.001g/m
3The time, stop test.
Specific embodiment is as follows:
1) according to synoptic diagram shown in Figure 1, coupling shaft is checked each parts and pipeline sealing to compression system, gas supply system, simulation system, measurement and acquisition system, sand preparing system;
2) full-hole core 308 not perforate end faces are placed rubber gasket 307, after utilize the seaming chuck of self-adhesion band 306 sealing full-hole core 308, rubber gasket 307 and core holding units 305; Full-hole core 308 perforate end faces are placed rubber gasket 310 with holes, rubber gasket 310 apertures and rock core mesopore 309 equal diameters or big slightly, after utilize self-adhesion band 306 sealing full-hole core 308, rubber gasket 310 and core holding unit 305 push-down heads; As shown in table 1 below is full-hole core size table after drilling and coring delivery processing of certain gas field.
Table 1
3) open autoclave 302, the core holding unit 305 of clamping full-hole core 308 is put into autoclave 302, close autoclave 302, check sealing;
4) start axial compression pump 102, by axial compression control device 103 axial pressure to 1.0MPa;
5) start gas supply system, regulate intake pressure to 0.2MPa by constant temperature and pressure device 203, and kept 1 hour;
6) start measurement and acquisition system, write down intake pressure, top hole pressure, rate of discharge automatically;
7) close source of the gas, measurement and acquisition system after 1 hour and suspend test, unload filtrator 501, sand sample in the filtrator 501 is cleaned, record data are weighed in oven dry;
8) reconnect filtrator 501, start and measure and acquisition system, strengthen intake pressure and continue test;
9) repeating step 7 and step 8 strengthen gas feed pressure step by step and keep axle pressure to be a bit larger tham inlet gas pressure, as full-hole core 308 sand production rates/gas flow＞0.001g/m
3The time, stop test.
After testing with said method, Fig. 2 schemes over time for intake pressure, top hole pressure, the flow of the certain hour gathered, and table 2 is a full-hole core sanding critical flow velocity test data table.
Table 2
As shown in Table 2, when gas flow by 30.029m
3/ h is increased to 33.865m
3During/h, the sand production rate of full-hole core is increased to 0.153g/h by 0.008g/h, and output sand is high-visible, sand production rate/gas flow＞0.001g/m
3, 30.029m
3The gas flow of/h is the sanding critical flow amount.According to the rock core size, the percolation flow velocity 2.326m/s in the calculating on the hole wall is the sanding critical flow velocity of gas well.For the drawdown pressure in this gas field and the formulation of joining product provide foundation.
More than be concrete test method of the present invention and concrete application aborning, can be good at being applied in the production scene of gas well, greatly reduce the risk of shaking out of gas well, saved cost, improved economic benefit.
Claims (2)
1. a device that is used to measure sanding critical flow velocity of gas well is characterized in that: be made up of axial pressure system, gas supply system, simulation system, measurement and acquisition system, sand preparing system; Described axial pressure system is made up of storage tank (101), axial compression pump (102) and axial compression control device (103); Described gas supply system is made up of air pressure pump (201), high pressure tank (202) and constant temperature and pressure device (203); Described simulation system is made up of autoclave (302), core holding unit (305), self-adhesion band (306), rubber gasket (307), full-hole core (308) and rubber gasket (310); Have piston (301), air intake opening (303), exhausr port (304) on the described autoclave (302); Described full-hole core (308) lower end has rock core mesopore (309) but does not drill through; Described rubber gasket (310) aperture and rock core mesopore (309) equal diameters or big slightly; Described measurement and acquisition system are made up of inlet pressure gauge (401), delivery gauge (402), vortex precession flowmeter (403), data collecting card (404) and data Output Display Unit (405); Described sand preparing system is made up of filtrator (501), high temperature baking box (502) and electronic balance (503).
2. method of using the described device that is used to measure sanding critical flow velocity of gas well of claim 1 to measure sanding critical flow velocity of gas well is characterized in that comprising following steps:
1) on full-hole core (308) not perforate end face, place rubber gasket (307), after utilize the seaming chuck of self-adhesion band (306) sealing full-hole core (308), rubber gasket (307) and core holding unit (305); Full-hole core (308) perforate end face is placed down rubber gasket (310), after utilize self-adhesion band (306) sealing full-hole core (308), rubber gasket (310) and core holding unit (305) push-down head;
2) open autoclave (302), the core holding unit (305) of clamping full-hole core (308) is put into autoclave (302), close autoclave (302);
3) start axial compression pump (102), by axial compression control device (103) axial pressure to set pressure;
4) start gas supply system, regulate intake pressure to set pressure, and keep certain hour by constant temperature and pressure device (203);
5) start measurement and acquisition system, write down intake pressure, top hole pressure, rate of discharge automatically;
6) close source of the gas, measurement and acquisition system behind the certain hour, unload filtrator (501), sand sample in the filtrator (501) is cleaned, record data are weighed in oven dry;
7) reconnect filtrator (501), start and measure and acquisition system, strengthen intake pressure and continue test;
8) repeating step 6 and step 7 strengthen gas feed pressure step by step, full-hole core 308 sand production rates/gas flow＞0.001g/m
3The time, stop test.
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067494A (en) * | 2015-07-10 | 2015-11-18 | 中国矿业大学 | Permeability testing method and device based on radial percolation experiment |
| CN105115695A (en) * | 2015-08-26 | 2015-12-02 | 中交第二航务工程局有限公司 | Method for measuring critical flow velocity of slurry shield pipeline |
| CN106018745A (en) * | 2016-06-21 | 2016-10-12 | 中国石油天然气股份有限公司 | Device and method for measuring flow rate of gas well sand production critical gas |
| CN108956351A (en) * | 2017-05-24 | 2018-12-07 | 中国石油天然气股份有限公司 | Take the analysis method and device of sand gas erosion core |
| CN109826622A (en) * | 2019-03-07 | 2019-05-31 | 中国石油大学(北京) | The simulation system that simulation sandstone reservoir shakes out |
| CN110514571A (en) * | 2019-07-15 | 2019-11-29 | 中国海洋石油集团有限公司 | A kind of high gas rate well sand control method and the preferred method of precision |
| CN112098300A (en) * | 2020-09-21 | 2020-12-18 | 重庆科技学院 | Full-diameter core radial flow permeability testing device and testing method |
| CN112377169A (en) * | 2020-11-30 | 2021-02-19 | 中国石油天然气集团有限公司 | Gas storage well injection and production sand production simulation system and method |
| CN113090257A (en) * | 2021-04-28 | 2021-07-09 | 中国石油天然气股份有限公司 | Volcanic formation sand production simulation test method and device |
| CN113899643A (en) * | 2020-07-06 | 2022-01-07 | 中海油能源发展股份有限公司 | Evaluation device and method for scouring resistance experiment of chemical sand prevention consolidation rock core |
| CN114739882A (en) * | 2022-03-21 | 2022-07-12 | 煤炭科学研究总院有限公司 | Experimental device for monitoring pore water pressure and transverse permeability based on single-axis testing machine |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105067494A (en) * | 2015-07-10 | 2015-11-18 | 中国矿业大学 | Permeability testing method and device based on radial percolation experiment |
| CN105115695A (en) * | 2015-08-26 | 2015-12-02 | 中交第二航务工程局有限公司 | Method for measuring critical flow velocity of slurry shield pipeline |
| CN105115695B (en) * | 2015-08-26 | 2017-05-31 | 中交第二航务工程局有限公司 | Method for determining slurry shield pipeline critical flow velocity |
| CN106018745A (en) * | 2016-06-21 | 2016-10-12 | 中国石油天然气股份有限公司 | Device and method for measuring flow rate of gas well sand production critical gas |
| CN108956351B (en) * | 2017-05-24 | 2021-01-01 | 中国石油天然气股份有限公司 | Analysis method and device for sand-carrying gas washout rock core |
| CN108956351A (en) * | 2017-05-24 | 2018-12-07 | 中国石油天然气股份有限公司 | Take the analysis method and device of sand gas erosion core |
| CN109826622A (en) * | 2019-03-07 | 2019-05-31 | 中国石油大学(北京) | The simulation system that simulation sandstone reservoir shakes out |
| CN110514571A (en) * | 2019-07-15 | 2019-11-29 | 中国海洋石油集团有限公司 | A kind of high gas rate well sand control method and the preferred method of precision |
| CN113899643A (en) * | 2020-07-06 | 2022-01-07 | 中海油能源发展股份有限公司 | Evaluation device and method for scouring resistance experiment of chemical sand prevention consolidation rock core |
| CN112098300A (en) * | 2020-09-21 | 2020-12-18 | 重庆科技学院 | Full-diameter core radial flow permeability testing device and testing method |
| CN112377169A (en) * | 2020-11-30 | 2021-02-19 | 中国石油天然气集团有限公司 | Gas storage well injection and production sand production simulation system and method |
| CN113090257A (en) * | 2021-04-28 | 2021-07-09 | 中国石油天然气股份有限公司 | Volcanic formation sand production simulation test method and device |
| CN114739882A (en) * | 2022-03-21 | 2022-07-12 | 煤炭科学研究总院有限公司 | Experimental device for monitoring pore water pressure and transverse permeability based on single-axis testing machine |
| CN114739882B (en) * | 2022-03-21 | 2023-08-29 | 煤炭科学研究总院有限公司 | Experimental device for monitoring pore water pressure and transverse permeability based on single-axis testing machine |
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