CN110671096A - Carbonate rock fault block oil reservoir sectional flow control oil extraction test device - Google Patents
Carbonate rock fault block oil reservoir sectional flow control oil extraction test device Download PDFInfo
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- CN110671096A CN110671096A CN201910948243.0A CN201910948243A CN110671096A CN 110671096 A CN110671096 A CN 110671096A CN 201910948243 A CN201910948243 A CN 201910948243A CN 110671096 A CN110671096 A CN 110671096A
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- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 title claims abstract description 33
- 239000011435 rock Substances 0.000 title claims abstract description 28
- 238000000605 extraction Methods 0.000 title claims abstract description 25
- 238000012360 testing method Methods 0.000 title claims abstract description 21
- 239000003921 oil Substances 0.000 claims abstract description 143
- 239000010779 crude oil Substances 0.000 claims abstract description 49
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 238000003860 storage Methods 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 11
- 239000002699 waste material Substances 0.000 claims abstract description 6
- 238000011084 recovery Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 230000011218 segmentation Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/14—Obtaining from a multiple-zone well
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Earth Drilling (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a carbonate rock broken block oil reservoir sectional flow control oil extraction test device which mainly comprises a casing, a non-porous oil pipe, a crude oil inlet, a variable aperture screen pipe, a first oil control section, a packer, a first necessary sealing section, a second oil control section, a second necessary sealing section, a non-flow control section, a first ball valve, a transparent rectangular box body, a conventional screen pipe, a second ball valve, a liquid flowmeter, a pressure pump, an oil storage tank, a third ball valve, a waste barrel, a solid-liquid two-phase separator, a measuring cylinder, a mixture outlet, a fourth ball valve, a crude oil outlet, a fifth ball valve and an air pump; the oil storage tank is sequentially connected with the pressure pump, the liquid flowmeter, the second ball valve and the first ball valve, and the mixture outlet is sequentially connected with the solid-liquid two-phase separator, the third ball valve and the oil storage tank; and the air pump is connected with the fifth ball valve and then is connected with the fourth ball valve and the measuring cylinder in parallel. The invention can clearly detect the influence of pressure difference and different pressure pump discharge capacities on the oil extraction process of the carbonate rock fault block oil reservoir.
Description
Technical Field
The invention relates to an oil extraction test device, in particular to a carbonate rock fault block oil reservoir sectional flow control oil extraction test device.
Background
The horizontal well is an important technology for improving the recovery rate and the oil production speed in oil and gas field development. With the continuous progress of oil drilling technology, the current horizontal well drilling technology becomes a main mode for the rapid development of oil fields. When a plurality of production layers are drilled on the carbonate rock by adopting the horizontal well, a block breaking layer is often generated between the production layers under the actual working condition, namely, partitions are generated among the production layers and are not connected together. When oil extraction is carried out, the sand production amount is large in the process of exploiting the carbonate rock fault block oil reservoir, differential pressure distribution is easy to generate, and finally fluid in an oil pipe flows in an unbalanced manner. When the pressure difference occurs, the high-pressure producing layer has adverse effect on the low-pressure producing layer to form an unbalanced phenomenon, bottom water at the lower part of a high-pressure area can be rapidly pushed, and the oil quantity can be reduced or even the production can be stopped if water is leaked too early. Therefore, when the carbonate rock fault block oil reservoir is subjected to oil extraction, segmented flow control is adopted for oil extraction, and the pressure difference between the fault blocks is reasonably controlled; however, the problem to be solved by the scheme is that the influence on the oil quantity reduction is the largest when the pressure difference between the fault block oil reservoirs is large, and whether the oil recovery is facilitated when the pressure difference is large or small.
Disclosure of Invention
The invention aims to provide a carbonate broken block oil reservoir sectional flow control oil extraction test device which is used for measuring the influence of pressure difference and different pressure pump discharge capacities on the oil extraction process of the carbonate broken block oil reservoir.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a carbonate rock broken block oil reservoir sectional flow control oil extraction test device mainly comprises a casing, a non-porous oil pipe, a crude oil inlet, a variable aperture screen pipe, a first oil control section, a packer, a first necessary sealing section, a second oil control section, a second necessary sealing section, a non-flow control well section, a first ball valve, a transparent rectangular box body, a conventional screen pipe, a second ball valve, a liquid flowmeter, a pressure pump, an oil storage tank, a third ball valve, a waste barrel, a solid-liquid two-phase separator, a measuring cylinder, a mixture outlet, a fourth ball valve, a crude oil outlet, a fifth ball valve and an air pump; the oil storage tank is sequentially connected with the pressure pump, the liquid flowmeter, the second ball valve and the first ball valve, and the mixture outlet is sequentially connected with the solid-liquid two-phase separator, the third ball valve and the oil storage tank; and the air pump is connected with the fifth ball valve and then is connected with the fourth ball valve and the measuring cylinder in parallel.
Furthermore, the variable-aperture screen pipe, the first oil control section, the packer, the first necessary well section, the second oil control section, the second necessary well section and the non-flow control well section are positioned in the transparent rectangular box body.
Further, the apertures of the screen pipe with the variable aperture are randomly distributed in the ranges of 10mm, 15mm, 20mm and 25 mm.
Furthermore, the variable-aperture sieve tube only exists in the first oil control section and the second oil control section, and aims to protect the well wall, prevent sand and control flow.
Furthermore, the upper side and the lower side of the transparent rectangular box body are respectively provided with 3 crude oil inlets, and the purpose is to inject crude oil into the carbonate rock block to simulate a carbonate rock reservoir at the bottom of a well.
Furthermore, the 6 crude oil inlets are evenly distributed on two sides of the first oil control section, the second oil control section and the non-flow control well section and are arranged in the middle.
Furthermore, the transparent rectangular box body and the sleeve are made of transparent high-pressure-resistant PC materials, and the pressure bearing capacity is 3 MPa.
Furthermore, the middle parts of the first oil control section and the second oil control section are respectively provided with three sections of screen pipes with variable aperture, and the screen pipes and the oil pipes without apertures are fixed together by welding.
Furthermore, a conventional sieve tube is arranged in the non-flow control well section, is positioned in the middle of the non-flow control well section, and has an aperture of 15 mm.
Furthermore, the first necessary well sealing section and the second necessary well sealing section simulate a fault block oil reservoir under the actual working condition.
Further, the first oil control section, the second oil control section and the non-flow control well section simulate a carbonate reservoir; the non-porous oil pipe simulates an oil production pipe under the actual working condition, and the sleeve pipe simulates a sleeve pipe under the actual working condition.
Furthermore, the rock blocks in the first oil control section, the second oil control section and the non-flow control well section are carbonate rock blocks.
Further, the ball valves in the whole testing device are the same.
Furthermore, the left lower parts of the first oil control section, the second oil control section and the non-flow control well section are respectively provided with a pressure sensor which is connected with a pressure monitoring system, and the pressure values measured by the pressure sensors can be directly read out through the pressure monitoring system.
Compared with the prior art, the invention has the advantages that: (1) the pressure sensors are arranged to monitor the pressure in the first oil control section, the second oil control section and the non-flow control well section, so that the influence of different pressures in the carbonate rock fault block oil reservoir on the oil extraction process can be obtained; (2) the opening of a first ball valve connected with the first oil control section, the second oil control section and the uncontrolled flow well section is controlled so as to control the pressure in the first oil control section, the second oil control section and the uncontrolled flow well section, so that the actual complex working condition can be simulated more truly; (3) through setting up transparent rectangle box for transparent, can more clearly observe the influence that pressure differential took turns to oil recovery to first accuse oil section, second accuse oil section, non-accuse flow well section.
Drawings
FIG. 1 is a schematic structural diagram of a carbonate fault block reservoir sectional flow control oil extraction test device according to the invention;
FIG. 2 is a schematic view of the transparent rectangular box filled with crude oil without entering the screen pipe with variable aperture and the conventional screen pipe.
In the figure: 1. the system comprises a pressure monitoring system, 2, a sleeve, 3, a non-porous oil pipe, 4, a crude oil inlet, 5, a variable aperture screen pipe, 6, a first oil control section, 7, a packer, 8, a first necessary sealing section, 9, a second oil control section, 10, a second necessary sealing section, 11, a non-controlled flow well section, 12, a first ball valve, 13, a transparent rectangular box body, 14, a conventional screen pipe, 15, a second ball valve, 16, a liquid flowmeter, 17, a booster pump, 18, an oil storage tank, 19, a third ball valve, 20, a waste barrel, 21, a solid-liquid two-phase separator, 22, a measuring cylinder, 23, a mixture outlet, 24, a fourth ball valve, 25, a crude oil outlet, 26, a fifth ball valve, 27, an air pump and 28, and a pressure sensor.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in FIG. 1, the invention relates to a carbonate rock fault block oil reservoir segmented flow control oil extraction test device, which mainly comprises a casing 2, a non-porous oil pipe 3, a crude oil inlet 4, a variable aperture sieve pipe 5, a first oil control section 6, a packer 7, a first necessary sealing well section 8, a second oil control section 9, a second necessary sealing well section 10, a non-flow control well section 11, a first ball valve 12, a transparent rectangular box body 13, a conventional sieve pipe 14, a second ball valve 15, a liquid flowmeter 16, a booster pump 17, an oil storage tank 18, a third ball valve 19, a waste barrel 20, a solid-liquid two-phase separator 21, a measuring cylinder 22, a mixture outlet 23, a fourth ball valve 24, a crude oil outlet 25, a fifth ball valve 26 and an air pump 27; the oil storage tank 18 is sequentially connected with a pressure pump 17, a liquid flowmeter 16, a second ball valve 15 and a first ball valve 12, and the mixture outlet 23 is sequentially connected with a solid-liquid two-phase separator 21, a third ball valve 19 and the oil storage tank 18; the air pump 27 is connected with the fifth ball valve 26 and then connected with the fourth ball valve 24 and the measuring cylinder 22 in parallel.
As shown in fig. 1, the upper and lower edges of the transparent rectangular box 13 are respectively provided with 3 crude oil inlets 4, and the upper and lower sides are symmetrically arranged. Each crude oil inlet 4 is respectively connected with 1 first ball valve 12, and each crude oil inlet 4 is sequentially positioned in the middle of the first oil control section 6, the second oil control section 9 and the non-flow control well section 11.
As shown in fig. 1, three sections of variable-aperture sieve tubes 5 are respectively arranged in the first oil control section 6 and the second oil control section 9, and are fixed with the oil pipe 3 without holes by welding. The three sections of the screen pipes 5 with variable aperture are distributed according to the same interval, and the purpose is to protect the well wall, prevent sand and control flow. The apertures of the screen pipes 5 with the variable apertures are randomly distributed in the ranges of 10mm, 15mm, 20mm and 25 mm. The conventional sieve tube 14 is positioned in the middle of the non-flow control well section 11, and the left end of the conventional sieve tube is fixedly connected with the non-porous oil pipe 3 through welding. The conventional screen 14 is a prior art screen with a 15mm hole diameter and will not be described in detail herein.
As shown in FIG. 1, the diameter of the non-porous oil pipe 3 is 127mm, and the two ends of the first necessary sealing section 8 and the second necessary sealing section 10 are respectively provided with the same packer 7 for separating the first oil control section 6, the second oil control section 9 and the non-oil control section 11 in pairs. The first necessary well sealing section 8 and the second necessary well sealing section 10 are used for simulating the carbonate broken block oil reservoir under the actual working condition.
As shown in fig. 1-2, when the pressure difference change of the segmented flow-control oil extraction fault block area needs to be measured for the carbonate fault block oil reservoir,all the ball valves are closed first, and then the booster pump 17, the second ball valve 15 and the 6 first ball valves 12 are opened in sequence, and the flow rate of the booster pump 17 is adjusted to 0.25m3S, opening degree of the 6 first ball valves 12 is the same, namely 1/3 of full opening; the crude oil in the oil storage tank 18 is pressurized by a pressurizing pump 17, and the crude oil is metered by a liquid flow meter 16, passes through a second ball valve 15 and 6 first ball valves 12 and finally flows into the carbonate rock block in the transparent rectangular box body 13 from the crude oil inlet 4. When crude oil flows in from the crude oil inlet 4, the air pump 27 and the fifth ball valve 26 are sequentially opened, the air pump 27 is enabled to pressurize towards the crude oil outlet 25, the pressure in the non-porous oil pipe 3 is enabled to be the same as the pressure provided by the pressurizing pump 17 for the crude oil, and finally the phenomenon that the carbonate rock blocks of the crude oil in the first oil control section 6, the second oil control section 9 and the non-flow control well section 11 seep to the positions of the variable-aperture sieve pipe 5 and the conventional sieve pipe 14 but do not flow into the sieve pipe is achieved. At the moment, a crude oil reservoir in the carbonate rock reservoir under the actual working condition is simulated, redundant crude oil flows upwards from the environment control between the casing 2 and the non-porous oil pipe 3, finally flows out from a mixture outlet 23 to a solid-liquid two-phase separator 21 for separation, separated rock debris particles enter a waste material barrel 20, and the separated crude oil flows into an oil storage tank 18 for reuse.
And then closing the fifth ball valve 26, the air pump 27 and the ball valve connected with the mixture outlet 23, opening the fourth ball valve 24, controlling the opening degree of the fourth ball valve 24 to be 1/10 with full opening, adjusting the opening degree of the first ball valve on the first oil control section 6 to be 1/5 with full opening, adjusting the opening degree of the first ball valve on the second oil control section 9 to be 2/5 with full opening, and adjusting the opening degree of the first ball valve on the uncontrolled flow well section 11 to be 3/5 with full opening. The pressure in the first oil control section 6, the second oil control section 9 and the non-flow control well section 11 is monitored through the pressure monitoring system 1, crude oil seeps into the variable-aperture screen pipe 5 and the conventional screen pipe 14 through the carbonate rock under the action of differential pressure and finally accumulates in the non-porous oil pipe 3, and as time increases, the crude oil in the non-porous oil pipe 3 is more and more, and finally flows out of the crude oil outlet 25 into the measuring cylinder 22 for measurement. The change of the crude oil before and after entering the variable-aperture screen pipe 5 and the conventional screen pipe 14 and the time required for the crude oil to flow out from the crude oil outlet 25 are recorded by a camera (not shown), and the pressure values in the first oil control section 6, the second oil control section 9 and the non-oil control well section 11 displayed on the pressure monitoring system 1 are recorded. And then, the steps are repeated according to the times of the following table for testing, and the corresponding pressure value and the record of the crude oil flowing phenomenon, the change condition of the crude oil before and after entering the variable-aperture sieve tube 5 and the conventional sieve tube 14 and the time required for the crude oil to flow out from the sieve tube to the crude oil outlet 25 are well recorded.
The flow rate of the pressure pump 17 is 0.5m in turn3/s,0.75m3/s,1m3/s,1.25m3/s,1.5m3And/s, respectively repeating the step of the above table, and recording pressure values in the first oil control section 6, the second oil control section 9 and the non-flow control well section 11 under different flow rates of the booster pump 17, the change condition of the crude oil before and after entering the variable-aperture sieve tube 5 and the conventional sieve tube 14 under different flow rates of the booster pump 17 and the time required for the crude oil to flow out from the sieve tube to the crude oil outlet 25. And drawing a three-dimensional coordinate curve graph with the X axis as the flow of the booster pump 17, the Y axis as the pressure value and the Z axis as the time required by the crude oil to flow from the screen pipe to the crude oil outlet 25 after the whole test is finished. And drawing a three-dimensional coordinate curve graph with the X axis as the flow of the booster pump 17, the Y axis as the pressure value and the Z axis as the opening of the ball valve.
The invention tests the influence of different flow rates of the pressurizing pump 17 and different opening degrees of the first oil control section 6, the second oil control section 9 and the uncontrolled flow well section 11 on the oil extraction process in the segmented flow-controlled oil extraction process of the carbonate rock fault block oil reservoir, records the flow condition of crude oil and the time required for the crude oil to flow out from the crude oil inlet to the crude oil outlet 25 by the camera for visual observation, simultaneously monitors the change conditions of the pressures in the first oil control section 6, the second oil control section 9 and the uncontrolled flow well section 11 under different flow rates of the pressurizing pump 17 by the pressure sensor 28, and draws an XYZ three-dimensional coordinate curve graph, wherein the result provides guidance for the segmented flow-controlled oil extraction of the carbonate rock fault block oil reservoir under the actual working condition on site.
Claims (7)
1. The utility model provides a carbonate piece oil reservoir segmentation accuse stream oil recovery test device which characterized in that: the testing device mainly comprises a casing (2), a non-porous oil pipe (3), a crude oil inlet (4), a variable-aperture screen pipe (5), a first oil control section (6), a packer (7), a first necessary well sealing section (8), a second oil control section (9), a second necessary well sealing section (10), a non-controlled flow well section (11), a first ball valve (12), a transparent rectangular box body (13), a conventional screen pipe (14), a second ball valve (15), a liquid flowmeter (16), a booster pump (17), an oil storage tank (18), a third ball valve (19), a waste barrel (20), a solid-liquid two-phase separator (21), a measuring cylinder (22), a mixture outlet (23), a fourth ball valve (24), a crude oil outlet (25), a fifth ball valve (26) and an air pump (27); the oil storage tank (18) is sequentially connected with the pressure pump (17), the liquid flowmeter (16), the second ball valve (15) and the first ball valve (12), and the mixture outlet (23) is sequentially connected with the solid-liquid two-phase separator (21), the third ball valve (19) and the oil storage tank (18); the air pump (27) is connected with the fifth ball valve (26) and then is connected with the fourth ball valve (24) and the measuring cylinder (22) in parallel.
2. The carbonate rock fault block reservoir sectional flow control oil extraction test device of claim 1, characterized in that: the variable-aperture sieve tube (5), the first oil control section (6), the packer (7), the first necessary well sealing section (8), the second oil control section (9), the second necessary well sealing section (10) and the non-flow control well section (11) are positioned in the transparent rectangular box body (13).
3. The carbonate rock fault block reservoir sectional flow control oil extraction test device of claim 2, characterized in that: and 3 crude oil inlets (4) are respectively arranged on the upper side and the lower side of the transparent rectangular box body (13).
4. The carbonate rock fault block reservoir segmented flow control oil extraction test device of claim 3, characterized in that: the 6 crude oil inlets (4) are evenly distributed on two sides of the first oil control section (6), the second oil control section (9) and the non-flow control well section (11) and are arranged in the middle.
5. The carbonate rock fault block reservoir sectional flow control oil extraction test device of claim 1, characterized in that: the transparent rectangular box body (13) and the sleeve (2) are made of transparent high-pressure-resistant PC materials, and the pressure bearing capacity is 3 MPa.
6. The carbonate rock fault block reservoir segmented flow control oil extraction test device of claim 4, characterized in that: the middle parts of the first oil control section (6) and the second oil control section (9) are respectively provided with three sections of variable-aperture sieve tubes (5), and the sieve tubes and the oil pipe (3) without holes are fixed together by welding.
7. The carbonate rock fault block reservoir segmented flow control oil extraction test device of claim 4, characterized in that: and a conventional sieve tube (14) is arranged in the non-flow control well section (11), is positioned in the middle of the non-flow control well section (11), and has the aperture of 15 mm.
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| CN201910948243.0A CN110671096B (en) | 2019-10-08 | 2019-10-08 | Carbonate rock fault block oil reservoir sectional flow control oil extraction test device |
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| CN201910948243.0A CN110671096B (en) | 2019-10-08 | 2019-10-08 | Carbonate rock fault block oil reservoir sectional flow control oil extraction test device |
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| 孙志刚等: "断块油藏注采耦合物理模拟实验", 《石油地质与工程》 * |
| 苗翠红: "胜利油田坨28断块沙二段1-3砂层组油藏描述研究", 《中国优秀硕士学位论文数据库信息科技1辑》 * |
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