CN205135616U - Evaluation open hole completion oil well shakes out critical pressure less than experimental apparatus - Google Patents
Evaluation open hole completion oil well shakes out critical pressure less than experimental apparatus Download PDFInfo
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- CN205135616U CN205135616U CN201520687650.8U CN201520687650U CN205135616U CN 205135616 U CN205135616 U CN 205135616U CN 201520687650 U CN201520687650 U CN 201520687650U CN 205135616 U CN205135616 U CN 205135616U
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Abstract
The utility model provides an evaluation open hole completion oil well shakes out critical pressure less than experimental apparatus, it is poor that is used for confirming that the oil field shakes out the critical pressure. Utilize on -the -spot institute coring or artifical rock core experiment, bore the center -through hole that a diameter is 25mm in the middle of the experiment rock core, as the simulation wellbore hole. The crude oil in the poor oil field of critical pressure that shakes out is surveyd to the oil that uses in the experiment as needs. According to the required axial load who adds of rock core in the definite experiment of the geological data in oil field. Utilizing constant voltage equipment invariable oil of pumping -in pressure in to the autoclave in the experiment, can adjusting the pressure differential inside and outside the rock core through adjusting the constant voltage equipment delivery pressure, the sand content is greater than at 0.5 per mill o'clock in the oil that laser particle analyzer survey flows, thinks promptly that the rock core takes place to destroy, and it is poor that the pressure differential of this moment thinks to shake out the critical pressure promptly, can not exceed here critical pressure difference in putting into production and produce. This set device test oil well poor actual conditions that can truly reflect the stratum of critical pressure of shaking out, to survey data true. This set device can satisfy the active demand of oil field to the poor survey of critical pressure of shaking out.
Description
Technical field
The utility model belongs to oil and gas field, is specifically related to a kind of Lab-evaluation barefoot completion sand production critical pressure differential experimental facilities.
Background technology
In oil extraction process, sand production is the common problem in oil field.After formation sand production, sand grains enters pit shaft and to wear and tear oil well pump and sucker rod, adds the frequency of well workover, considerably increases maintenance cost, and can block oil well when sand production in oil is serious, oil well is stopped production and even scraps.Especially for the stratum easily shaked out in loose cementation, recovery process, in process of production, the large young pathbreaker of producing pressure differential directly affects the situation of shaking out on stratum.For the stratum of barefoot completion, the large young pathbreaker's formation of producing pressure differential in process of production produces material impact, once producing pressure differential is excessive, the free sand that swiftly flowing oily stream will carry in stratum enters pit shaft.If pressure reduction increases, then may destroy the rock matrix in stratum again, make the load bearing solids in stratum become free sand, this will increase the sand production rate on stratum greatly, even makes formation collapse, buries pit shaft, thus well is scrapped.Worldwide, barefoot completion is still a kind of important completion mode, and especially at sea in oil field and land horizontal well, the application of barefoot completion is a lot, and its advantage is that completion difficulty is little, but its shortcoming is in recovery process, and oil well may shake out.Can draw in statistics, the ratio of shaking out in the oil well of barefoot completion is very large.Once sand production on open-hole completion, then the layer not having effective way to stop shakes out.In oil field, producing pressure differential is larger, and oily well yield is higher, and producing pressure differential is less, and oily well yield is less.How to determine that rational pressure differential range is very important aspect.The maximum method of critical pressure differential of determining now to shake out is numerical simulation, and its accuracy is not high, and widely different for the different oil reservoir in different oil fields, is not just to be shaked out critical pressure differential by Accurate Determining by a set of software.Therefore, need to develop a kind of can at the testing arrangement of laboratory inner evaluation barefoot completion sand production critical pressure differential.
Summary of the invention
For the problems referred to above, the purpose of this utility model is to provide a kind of Lab-evaluation barefoot completion sand production critical pressure differential experimental facilities, and this device can simulated formation rock actual conditions to greatest extent.
For achieving the above object, the utility model takes following technical scheme: a kind of evaluate barefoot completion sand production critical pressure differential experimental facilities, it is characterized in that: he comprises autoclave, constant-voltage equipment, axial compression control system, laser particle analyzer, high-pressure pump, the rock core of central hollow, data collecting card, rubber gasket, band, pressure sensor, number adopt computer etc.; Described autoclave height is 50cm, and diameter is 40cm, and described core diameter is 5-1/2 ", rock core height is 35cm, and be hollow-core construction in the middle of rock core, inflated diameter is 2.5cm.Described constant-voltage equipment can control inlet pressure accurately, thus tests under making rock core be in constant pressure reduction, is changed the inside and outside differential pressure of rock core by the outlet pressure of regulating constant pressure device.Described laser particle analyzer can measure the sand content in the oil flowed out from rock core in real time, and when sand content is greater than 0.5 ‰, think that rock core destroys, pressure reduction is now critical pressure differential.
The utility model patent is owing to taking above technical scheme, and it has the following advantages: 1, experiment condition is simulation stratum condition, and rock core tests the accuracy that ensure that experimental data under constant pressure reduction, high for measured data reliability.2. the critical pressure differential that shakes out surveyed in the utility model can well guide field activity in production.3, the device in the utility model is installed simple, easy to operate, and test speed is fast.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model
Fig. 2 is the top view of experiment rock core
Fig. 3 is the sectional drawing of experiment rock core
In figure: oil storage tank 1, axial compression pump 2, axial compression control system 3, shoe cream room 4, piston 5, sealing ring 6, upper rubber gasket 7, band 8, rock core 9, simulation wellbore hole 10, autoclave inner chamber 11, core holding unit 12, autoclave lower flange 13, oil storage tank 14, high-pressure pump 15, constant-voltage equipment 16, inlet pressure gauge 17, inlet pressure sensor 18, delivery gauge 19, outlet pressure sensor 20, laser particle analyzer 21, fluid flowmeter 22, data collecting card 23, number adopts computer 24, autoclave upper flange 25, relief valve 26, lower rubber gasket 27, autoclave 28, connect liquid pool 29.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in detail.
As shown in Figure 1, the utility model comprise one axial compression pump 2, axial compression control system 3, rock core 9, core holding unit 12, high-pressure pump 15, constant-voltage equipment 16, laser particle analyzer 21, fluid flowmeter 22, data collecting card 23, a number adopt computer 24, relief valve 26 1 autoclave 28, some pressure meters, pressure sensor and sealing mat etc.Rock core 9 is put in autoclave inner chamber 11, be placed on core holding unit 12, lower rubber gasket 27 is had in the middle of rock core 9 and core holding unit 12, after rock core 9 places, shoe cream room 4, piston 5 and autoclave upper flange 25 are integrated device, autoclave upper flange 25 to be placed on autoclave 28 and to lock, piston 5 contacts with rock core 9, there is upper rubber gasket 7 centre, band 8 is wound in the outside that rubber gasket 7 contacts with rock core 9, after starting axial compression pump 2, the oil in oil storage tank 1 is made to enter shoe cream room 4 by controlling axial compression control device 3, thus promotion piston 5 moves downward, the upper rubber gasket 7 and the lower rubber gasket 27 that contact with rock core 9 play the effect sealing rock core 9 under the promotion of piston, open relief valve 26, open laser particle analyzer 21, data collecting card 23 adopts computer 24 with number, start high-pressure pump 15, oil in oil storage tank 14 is pressurizeed by high-pressure pump 15 and enters pipe-line system, constant-voltage equipment 16 can make oil enter autoclave inner chamber 11 with constant pressure, regulating constant pressure device 16 can change the pressure that oil enters autoclave inner chamber 11, relief valve 26 is closed after autoclave inner chamber 11 is full of oil, the pressure that inlet pressure gauge 17 and inlet pressure sensor 18 gather is autoclave 28 inlet pressure, oil in autoclave inner chamber 11 enters simulation wellbore hole 10 by rock core 9, the oil entering simulation wellbore hole may carry the sand grains in rock core 9, oil is by can sand content in real-time analysis oil after laser particle analyzer 21, last oil enters and connects liquid pool 29, delivery gauge 19, the pressure that what outlet pressure sensor 20 collected is in simulation wellbore hole 10, the pressure that inlet pressure sensor 18 gathers, outlet pressure sensor 20 gather pressure and laser particle analyzer 21 in sand content data summarization to data collecting card 23 and number adopt the data that in computer 24, display gathers, the pressure that oil enters autoclave inner chamber 11 is changed by regulating constant pressure device 16, when the sand content data that laser particle analyzer 21 gathers are greater than 0.5 ‰, think that rock core destroys, the pressure difference value that now inlet pressure sensor 18 and outlet pressure sensor 20 gather is the critical pressure differential that shakes out.
In above-described embodiment, have a sealing mat between rock core 9 and core holding unit 12, one section of core holding unit 12 and sealing mat 27 and rock core 9 bottom seals with band.Have a sealing mat 7 between rock core 9 top and piston 5, one section of piston 5 and sealing mat 7 and rock core 9 top seals with band 8, and the oil thus in autoclave inner chamber 11 just can not flow out from the space of junction.There is a sealing ring 6 between piston 5 and shoe cream room 4, serve the effect of sealing.The effect of relief valve 26 opens relief valve 26 in the oiling stage before starting of testing, and discharges the air in autoclave 28, close relief valve 26, open relief valve 26 pressure release after experiment terminates after drained air.
In above-described embodiment, inlet pressure sensor 18, outlet pressure sensor 20 are all connected with data collecting card 23 with laser particle analyzer 21 and fluid flowmeter 22, and all data will be transferred to number by data collecting card 23 and adopt computer 24.High-pressure pump 15 can provide pressure for oil after starting, but its pressure exported has fluctuation, and rock core 9 pairs of pressure oscillations are very sensitive, so added again a constant-voltage equipment 16 after high-pressure pump 15, its pressure filtration that high-pressure pump 15 can be exported is constant pressure.The inside and outside differential pressure of rock core 9 just can be controlled by the output pressure of regulating constant pressure device 16.And axial compression pump 2 and axial compression control system 3 can add axial load for rock core, like this can the stress of simulation rock when stratum, power can be provided to axial compression control system 3 by starting axial compression pump 2, and then give shoe cream room 4 fuel feeding by regulating shaft pressure control system 3, thus promotion piston 5 moves, piston 5 is pressed rock core 9 thus is applied axial compression to rock core 9.
Use procedure of the present utility model is:
1) first the rock core 9 of good seal is put into autoclave lower flange 13, then install autoclave upper flange 25.Open relief valve 26, start high-pressure pump 15 and constant-voltage equipment 16, to autoclave inner chamber 11 oiling, after filling oil, close high-pressure pump 15 and constant-voltage equipment 16, close relief valve 26.
2) axial compression pump 2 and axial compression control system 3 is started, the axial load added required for rock core 9 is determined by the geologic information in certain oil field, after rock core 9 is added to required axial load, again start high-pressure pump 15 and constant-voltage equipment 16, changed the inside and outside differential pressure of rock core 9 by the output pressure of regulating constant pressure device 16.The pressure difference value that the pressure difference value of inlet pressure gauge 17 and delivery gauge 19 or inlet pressure sensor 18 and outlet pressure sensor 20 collect is rock core 9 inside and outside differential pressure.
3) oil in autoclave 28 flows into simulation wellbore hole 10 by the hole of rock core 9 under the effect of the pressure, oil just can obtain the sand content in oil after flowing into laser particle analyzer 21, rear oil influent flow meter and then can flow be recorded again, sand content and data on flows all can be transferred to data collecting card 23, then can adopt on computer 24 at number and show, think that rock core destroys when sand content is greater than 0.5 ‰, stop experiment.Close high-pressure pump 15 and constant-voltage equipment 16, closing axle press pump 2 and axial compression control system 3.Open relief valve 26 pressure release.
4) finally derive test pressure data from counting to adopt computer 24, find out the inlet pressure 18 when sand content is 0.5 ‰ and outlet pressure 20, the difference of the two is the critical pressure differential that shakes out.
Claims (4)
1. an evaluation barefoot completion sand production critical pressure differential experimental facilities, it is characterized in that: rock core (9) is put in autoclave inner chamber (11), be placed on core holding unit (12), lower rubber gasket (27) is had in the middle of rock core (9) and core holding unit (12), after rock core (9) places, shoe cream room (4), piston (5) and autoclave upper flange (25) are integrated device, autoclave upper flange (25) is placed in autoclave (28) go up and lock, piston (5) contacts with rock core (9), there is upper rubber gasket (7) centre, band (8) is wound in the outside that rubber gasket (7) contacts with rock core (9), after starting axial compression pump (2), the oil in oil storage tank (1) is made to enter shoe cream room (4) by controlling axial compression control device (3), thus promotion piston (5) moves downward, the upper rubber gasket (7) contacted with rock core (9) and lower rubber gasket (27) play the effect sealing rock core (9) under the promotion of piston, open pressure relief opening (26), open laser particle analyzer (21), data collecting card (23) adopts computer (24) with number, start high-pressure pump (15), oil in oil storage tank (14) enters pipe-line system by high-pressure pump (15) pressurization, constant-voltage equipment (16) can make oil enter autoclave inner chamber (11) with constant pressure, regulating constant pressure device (16) can change the pressure that oil enters autoclave inner chamber (11), pressure relief opening (26) is closed after autoclave inner chamber (11) is full of oil, the pressure that inlet pressure gauge (17) and inlet pressure sensor (18) gather is autoclave (28) inlet pressure, oil in autoclave inner chamber (11) enters simulation wellbore hole (10) by rock core (9), the oil entering simulation wellbore hole may carry the sand grains in rock core (9), oil is by can sand content in real-time analysis oil after laser particle analyzer (21), last oil enters and connects liquid pool (29), delivery gauge (19), the pressure that what outlet pressure sensor (20) collected is in simulation wellbore hole (10), the pressure that inlet pressure sensor (18) gathers, sand content data summarization in the pressure that outlet pressure sensor (20) gathers and laser particle analyzer (21) is to data collecting card (23) and adopt the data showing in computer (24) and gather at number, the pressure that oil enters autoclave inner chamber (11) is changed by regulating constant pressure device (16), when the sand content data that laser particle analyzer (21) gathers are greater than 0.5 ‰, think that rock core destroys, the pressure difference value that now inlet pressure sensor (18) and outlet pressure sensor (20) gather is the critical pressure differential that shakes out.
2. device according to claim 1, it is characterized in that: described autoclave (28) is highly 50cm, diameter is 40cm, described rock core (9) diameter is 14cm, rock core (9) is highly 35cm, be hollow-core construction in the middle of rock core (9), inflated diameter is 2.5cm.
3. device according to claim 1, it is characterized in that: described constant-voltage equipment (16) can control inlet pressure accurately, thus test under making rock core (9) be in constant pressure reduction, the inside and outside differential pressure of rock core (9) is changed by the outlet pressure of regulating constant pressure device (16).
4. device according to claim 1, it is characterized in that: described laser particle analyzer (21) can measure the sand content in the oil flowed out from rock core (9) in real time, when sand content is greater than 0.5 ‰, think that rock core (9) destroys, pressure reduction is now the critical pressure differential that shakes out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520687650.8U CN205135616U (en) | 2015-09-08 | 2015-09-08 | Evaluation open hole completion oil well shakes out critical pressure less than experimental apparatus |
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| CN201520687650.8U CN205135616U (en) | 2015-09-08 | 2015-09-08 | Evaluation open hole completion oil well shakes out critical pressure less than experimental apparatus |
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| CN205135616U true CN205135616U (en) | 2016-04-06 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044790A (en) * | 2019-04-10 | 2019-07-23 | 中国科学院地质与地球物理研究所 | A kind of measuring device and method of critical filling pressure |
| CN110146424A (en) * | 2019-05-08 | 2019-08-20 | 中国石油大学(北京) | The simulator and method of stratum cell breath |
| CN111720117A (en) * | 2020-06-30 | 2020-09-29 | 中国石油大学(北京) | Oil and gas well productivity evaluation experiment method considering different well completion modes |
| CN111734407A (en) * | 2020-06-30 | 2020-10-02 | 中海石油（中国）有限公司天津分公司 | Oil-gas well productivity evaluation experimental device considering different well completion modes |
| CN113496074A (en) * | 2020-04-03 | 2021-10-12 | 中国石油天然气股份有限公司 | Sand stabilizing method and device |
-
2015
- 2015-09-08 CN CN201520687650.8U patent/CN205135616U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044790A (en) * | 2019-04-10 | 2019-07-23 | 中国科学院地质与地球物理研究所 | A kind of measuring device and method of critical filling pressure |
| CN110044790B (en) * | 2019-04-10 | 2020-06-19 | 中国科学院地质与地球物理研究所 | Device and method for measuring critical filling pressure |
| CN110146424A (en) * | 2019-05-08 | 2019-08-20 | 中国石油大学(北京) | The simulator and method of stratum cell breath |
| CN113496074A (en) * | 2020-04-03 | 2021-10-12 | 中国石油天然气股份有限公司 | Sand stabilizing method and device |
| CN111720117A (en) * | 2020-06-30 | 2020-09-29 | 中国石油大学(北京) | Oil and gas well productivity evaluation experiment method considering different well completion modes |
| CN111734407A (en) * | 2020-06-30 | 2020-10-02 | 中海石油（中国）有限公司天津分公司 | Oil-gas well productivity evaluation experimental device considering different well completion modes |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160406 Termination date: 20160908 |
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| CF01 | Termination of patent right due to non-payment of annual fee |