CN110965971B - Annular simulation device for water injection well - Google Patents
Annular simulation device for water injection well Download PDFInfo
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- CN110965971B CN110965971B CN201911278000.7A CN201911278000A CN110965971B CN 110965971 B CN110965971 B CN 110965971B CN 201911278000 A CN201911278000 A CN 201911278000A CN 110965971 B CN110965971 B CN 110965971B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 171
- 238000002347 injection Methods 0.000 title claims abstract description 46
- 239000007924 injection Substances 0.000 title claims abstract description 46
- 238000004088 simulation Methods 0.000 title claims abstract description 30
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 27
- 238000002474 experimental method Methods 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 43
- 239000010959 steel Substances 0.000 claims description 43
- 238000007789 sealing Methods 0.000 claims description 41
- 238000003466 welding Methods 0.000 claims description 14
- 238000004891 communication Methods 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000002457 bidirectional effect Effects 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000010992 reflux Methods 0.000 description 18
- 239000003921 oil Substances 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 239000010779 crude oil Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 239000002332 oil field water Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005507 spraying Methods 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/20—Displacing by water
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- Life Sciences & Earth Sciences (AREA)
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- Geology (AREA)
- Mining & Mineral Resources (AREA)
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- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
An annular simulation device for a water injection well. Comprises a water inlet pipeline, a simulated shaft, a return pipeline, a simulated formation pipeline and the like. Utilize this kind of analogue means, place intelligent wireless water distributor in this device's simulation pit shaft, later introduce high-pressure fluid from the filling opening, just can realize the simulation to intelligent wireless water distributor actual operating mode in the pit, and then realize the collection to water distributor water injection well mouth high-pressure water pressure and flow parameter, pressure through contrasting the water distributor upload, the pressure that flow signal and laboratory bench test obtained, flow signal, thereby water injection well annular space analogue means furthest has simulated the water injection operating mode in the pit, realize the maintenance to intelligent wireless water distributor in the pit, the inaccurate problem of intelligent wireless water distributor test in the pit has been solved, and greatly reduced the experiment cost.
Description
The technical field is as follows:
the invention relates to a water injection well annulus simulation device applied to the field of oilfield water injection.
Background art:
after the oil field is put into development, the energy of the oil layer is continuously consumed along with the increase of the exploitation time. The oil layer lamination is reduced, the underground crude oil is greatly degassed, the oil yield of the oil well is greatly reduced, and even the oil production is stopped by stopping spraying. This results in large losses due to the fact that a large amount of dead oil remains underground and cannot be recovered. In order to compensate for the underground pressure deficit caused by crude oil production, maintain or improve the formation pressure to realize high and stable yield of the oil field and obtain high recovery efficiency, a water injection process is developed.
At present, an intelligent separate layer water injection process becomes an important means for improving the oil injection and recovery rate. The water injection precision of each single water injection layer in the well determines the water injection condition of the whole water injection well, wherein the core component of the single water injection layer is an intelligent water distributor. The intelligent water distributor integrates the electromechanical integration technology, the computer control technology, the communication technology, the sensor technology, the precise mechanical transmission technology and other technologies, and needs to be subjected to an aboveground performance test before design and production for realizing the electric allocation and real-time measurement precision of the water injection condition of each underground layer of the layered water injection well, so that the situation that repeated throwing and fishing are performed due to performance problems after direct throwing into the underground is avoided. When the current intelligent water distributor is used for measuring and adjusting the water, the underground working condition can not be simulated, so that the deviation between the data measured on the well and the data under the underground working condition is large, the underground water injection precision is low, and the purpose of fine layered water injection can not be achieved.
The invention content is as follows:
in order to solve the technical problems mentioned in the background technology, the invention provides a water injection well annulus simulation device, which realizes the simulation of the actual working condition of an intelligent water distributor underground by injecting high-pressure fluid into a simulation shaft provided with the intelligent water distributor, further realizes the acquisition of pressure and flow parameters of high-pressure water of a water nozzle of the water distributor, and compares pressure and flow signals uploaded by the water distributor with pressure and flow signals obtained by a test of a laboratory bench. The water injection well annulus simulation device furthest has simulated the water injection operating mode in the pit, realizes the maintenance to intelligent water injection mandrel in the pit, has solved the inaccurate problem of intelligent water injection mandrel test to greatly reduced the experiment cost.
The technical scheme of the invention is as follows: this kind of water injection well annular space analogue means, including water inlet pipe line 1, simulation pit shaft 2, backflow pipeline 3 and simulation stratum pipeline 4, its unique is characterized in that:
a water inlet steel pipe 11, a first high-pressure ball valve 13 and a first high-precision flowmeter 12 are arranged corresponding to the water inlet pipeline 1, entering water enters the water inlet steel pipe 11 and then sequentially passes through the first high-pressure ball valve 13 and the first high-precision flowmeter 12, and the first high-pressure ball valve 13 and the first high-precision flowmeter 12 are both connected with the water inlet steel pipe 11 through flanges; the water inlet pipe 11 is connected with the simulated shaft 2 through a transition hose 14, and two ends of the transition hose are provided with high-pressure hose joints 15 which are respectively connected with the water inlet steel pipe 11 welded with the welding wires 241 and an upper connecting flange 24 in the simulated shaft 2;
an annular pipe 21, a sliding sealing joint 22, a sliding sealing sleeve 23, an upper connecting flange 24, a lower connecting flange 25 and an intelligent wireless water distributor 26 are arranged corresponding to the simulated shaft 2; one side of the upper connecting flange 24 is fixedly welded with the welding wire 241, a core jack 29 is arranged at the bottom of the welding wire, a core plug 28 is fixedly arranged in the core jack 29 in a sealing mode through threads and an O-shaped ring, one end of the core plug 28 is outwards used as a transmitting antenna during experiments, and the other end of the core plug is led into the intelligent wireless water distributor 26 through a conducting wire, so that data communication between the intelligent wireless water distributor 26 and the outside of the simulated shaft 2 is realized, and the underground two-way remote wireless communication of the intelligent wireless water distributor on the well is simulated; the other side of the upper connecting flange 24 is welded with a sliding sealing joint 22, the sliding sealing joint 22 is in shaft hole clearance fit with a sliding sealing sleeve 23, and the sliding sealing sleeve 23 is connected with an upper joint of an intelligent wireless water distributor 26 through threads; the sliding seal joint 22 is inserted into the sliding seal sleeve 23 and sealed through the O-shaped ring set 27, wherein the sliding seal joint 22 can linearly reciprocate in the sliding seal sleeve 23 to realize flexible connection of the intelligent wireless water distributor, so that the problem of thread damage caused by the fact that the intelligent wireless water distributor vibrates up and down due to water flow impact in the simulated shaft 2 is solved; a male buckle connector 251 is welded at one end of the lower connecting flange 25 and is connected with the lower connector of the intelligent wireless 26 through threads, and the other end of the lower connecting flange is welded with the backflow steel pipe 32; the lower part of the annular tube 21 is provided with a mounting hole 211 which is assembled with the stratum steel tube 42 by welding, the production process that the injection water enters the stratum after entering the intelligent wireless water distributor and being regulated by the flow is simulated, and the annular perforation of the water injection in the well is simulated;
a reflux pressure gauge 31, a reflux steel pipe 32, a second high-pressure ball valve 34 and a second high-precision flowmeter 33 are arranged corresponding to the reflux pipeline 3; after entering the intelligent wireless water distributor 26, one part of the injected water is injected into the annular pipe 21 through the intelligent wireless water distributor to be relayed and flows into the simulated formation pipeline 4, and the other part of the injected water enters the backflow pipeline 3 along the flow channel of the intelligent wireless water distributor 26 and sequentially passes through the backflow pressure gauge 31, the second high-precision flow meter 33 and the second high-pressure ball valve 34; wherein the reflux pressure gauge 31 is used for measuring water injection pressure, and is in sealing connection with the reflux pressure gauge mounting hole 311 on the reflux steel pipe through taper threads, and the second high-pressure ball valve 34 and the second high-precision flowmeter 33 are both in flange connection with the reflux steel pipe 32.
A formation pressure gauge 41, a third high-precision flowmeter 43, a formation steel pipe 42 and an annular pipe 21 are arranged corresponding to the simulated formation pipeline 4; the stratum steel pipe 42 and the annular hollow pipe 21 are welded to realize the sealing of the interface, water in the annular hollow pipe 21 flows into the stratum steel pipe 4, and the pressure and the water injection flow behind the nozzle of the intelligent wireless water distributor are measured sequentially through the stratum pressure gauge 41 and the third high-precision flow meter 43; wherein, the formation pressure gauge 41 is connected with the pressure gauge mounting hole 411 on the formation steel pipe 42 in a sealing way through a taper thread, and the third high-precision flow meter 43 is connected with the formation steel pipe 42 through a flange.
The invention has the following beneficial effects:
the water injection well annulus simulation device disclosed by the invention realizes the actual working condition of the simulated intelligent water distributor underground by injecting high-pressure fluid into the simulated shaft provided with the intelligent water distributor, further realizes the acquisition of pressure and flow parameters of high-pressure water of the water nozzle of the water distributor, and compares the pressure and flow signals uploaded by the water distributor with the pressure and flow signals obtained by the test of a laboratory bench. The water injection well annulus simulation device furthest has simulated the water injection operating mode in the pit, realizes the maintenance to intelligent water injection mandrel in the pit, has solved the inaccurate problem of intelligent water injection mandrel test to greatly reduced the experiment cost.
Description of the drawings:
fig. 1 is a schematic view of an overall structure of a water injection well annulus simulation device.
Fig. 2 is a schematic view of the overall assembly of the water inlet line.
FIG. 3 is a cut-away view of an upper portion of a simulated wellbore.
Figure 4 is an isometric view of an evacuated tube.
Fig. 5 is a cross-sectional view of the lower half of a simulated wellbore.
FIG. 6 is a schematic diagram of the overall assembly of a simulated formation pipeline.
Fig. 7 is a schematic view of the overall assembly of the return line.
In the figure: 1-a water inlet line; 2-simulating a wellbore; 3-a return line; 4-simulating a formation pipeline; 11-water inlet steel pipe; 12-a first high precision flow meter; 13-a first high pressure ball valve; 14-a transition hose; 15-high pressure hose connection; 21-an annular hollow pipe; 211-mounting holes; 22-sliding sealing joint; 23-sliding sealing sleeve; 24-an upper connecting flange; 241-welding wire; 25-lower connecting flange; 251-a male buckle connector; 26-intelligent water distributor; 27-O-ring set; 28-a core plug; 29-a core receptacle; 31-reflux pressure gauge; 311-reflux pressure gauge mounting hole; 32-reflux steel tube; 33-a second high precision flow meter; 34-a second high pressure ball valve; 41-formation pressure gauge; 411-formation pressure gauge mounting hole; 42-formation steel pipe; 43-third high accuracy flowmeter.
The specific implementation mode is as follows:
the invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1 to 7, the water injection well annulus simulation device mainly comprises a water inlet pipeline 1, a simulation wellbore 2, a return pipeline 3, a simulation formation pipeline 4 and the like.
In the water inlet pipeline 1, the injected water enters the water inlet steel pipe 11 and then sequentially passes through the first high-pressure ball valve 13 and the first high-precision flow meter 12, the first high-pressure ball valve 13 and the first high-precision flow meter 12 are both connected with the water inlet steel pipe 11 through flanges, as shown in fig. 2, the first high-precision flow meter 12 is used for measuring the actual flow rate of the injected water in an actual process. For convenient disassembly, the water inlet pipe 11 is connected with the simulation shaft 2 through a transition hose 14, and two ends of the transition hose are provided with high-pressure hose joints 15 which are respectively connected with the water inlet steel pipe 11 welded with the welding wires 241 and an upper connecting flange 24 in the simulation shaft 2.
The simulated well bore 2 comprises: the system comprises an annular pipe 21, a sliding sealing joint 22, a sliding sealing sleeve 23, an upper connecting flange 24, a lower connecting flange 25 and an intelligent water distributor 26. One side of the upper connecting flange 24 is fixedly welded with the welding wire 241, the bottom of the welding wire is provided with a core jack 29, a core plug 28 is fixedly arranged in the core jack 29 in a sealing mode through threads and an O-shaped ring, one end of the core plug 28 is outwards used as a transmitting antenna during experiments, and the other end of the core plug is led into the intelligent water distributor 26 through a conducting wire, so that data communication between the intelligent water distributor 26 and the outside of the simulated shaft 2 is realized, and the underground and aboveground two-way remote wireless communication of the intelligent water distributor is simulated; the other side of the upper connecting flange 24 is welded with a sliding sealing joint 22, the sliding sealing joint 22 is in clearance fit with a sliding sealing sleeve 23 through a shaft hole, and the sliding sealing sleeve 23 is connected with an upper joint of an intelligent water distributor 26 through threads; the sliding sealing joint 22 is inserted in the sliding sealing sleeve 23 and sealed through the O-shaped ring set 27, wherein the sliding sealing joint 22 can linearly reciprocate in the sliding sealing sleeve 23, so that flexible connection of the intelligent water distributor is realized, and the problem of thread damage caused by water flow impact vertical vibration of the intelligent water distributor in the simulated shaft 2 is solved; a male buckle joint 251 is welded at one end of the lower connecting flange 25 and is connected with the lower joint of the intelligent water distributor 26 through threads, and the other end of the lower connecting flange is welded with the backflow steel pipe 32; the lower part of the annular tube 21 is provided with a mounting hole 211 which is assembled with the stratum steel tube 42 by welding, the production process that the simulation injected water enters the stratum after entering the intelligent water distributor and being regulated by the flow is carried out, and the annular perforation of the water injection in the well is simulated.
The return line 3 comprises: the system comprises a reflux pressure gauge 31, a reflux steel pipe 32, a second high-pressure ball valve 34 and a second high-precision flow meter 33, wherein after the injected water enters the intelligent water distributor 26, one part of the injected water is injected into the annular pipe 21 through the intelligent water distributor to be relayed and flows into the simulated formation pipeline 4, and the other part of the injected water enters the reflux pipeline 3 along the flow channel of the intelligent water distributor 26 and sequentially passes through the reflux pressure gauge 31, the second high-precision flow meter 33 and the second high-pressure ball valve 34; wherein the reflux pressure gauge 31 is used for measuring water injection pressure, and is in sealing connection with the reflux pressure gauge mounting hole 311 on the reflux steel pipe through taper threads, and the second high-pressure ball valve 34 and the second high-precision flowmeter 33 are both in flange connection with the reflux steel pipe 32.
In the simulated formation pipeline 4, a formation steel pipe 42 and an annular pipe 21 are welded to realize the sealing of an interface, water in the annular pipe 21 flows into the formation steel pipe 4, and the post-nozzle pressure and the water injection flow of the intelligent water distributor are measured sequentially through a formation pressure gauge 41 and a third high-precision flow meter 43; wherein, the formation pressure gauge 41 is connected with the pressure gauge mounting hole 411 on the formation steel pipe 42 in a sealing way through a taper thread, and the third high-precision flow meter 43 is connected with the formation steel pipe 42 through a flange.
In specific implementation, the intelligent wireless water distributor can adopt a downhole charging type intelligent water distributor with application number 2019112691889. Specifically, when a single water injection layer water injection process simulation experiment is performed, the intelligent wireless water distributor 26 is installed in the simulated shaft 2 of the detection simulation device. High-pressure water flows through the water inlet pipeline 1 into the detected intelligent wireless water distributor 26, and the water flow direction is shown by an arrow in fig. 2. The water nozzle of the intelligent wireless water distributor 26 can be connected with an external control device through an antenna, and the water nozzle of the water distributor is adjusted by a computer to carry out an adjustment experiment of the intelligent wireless water distributor. The simulation device can change the flow and pressure in the pipeline and monitor the flow and the water pressure in the pipeline in real time. The pressure and flow parameters of the high-pressure water flowing through the water nozzle of the intelligent wireless water distributor are transmitted to a computer by a data acquisition system of the simulation device, and a pressure and flow data curve chart is drawn. Pressure gauge and flowmeter in the intelligent wireless water distributor detection simulator pipeline flow are standard sensors, and the detection data is standard values. And comparing the pressure and flow signals uploaded by the water distributor with the pressure and flow signals obtained by the test of the experiment table, and when the error of the data value measured by the water distributor is within an allowable range, the water distributor is qualified, otherwise, the water distributor is defective and needs to be overhauled.
Claims (1)
1. The utility model provides a water injection well annular space analogue means, includes water inlet pipeline, simulation pit shaft, return line and simulation stratum pipeline, its characterized in that:
a water inlet steel pipe, a first high-pressure ball valve and a first high-precision flowmeter are arranged corresponding to the water inlet pipeline, entering water enters the water inlet steel pipe and then sequentially passes through the first high-pressure ball valve and the first high-precision flowmeter, and the first high-pressure ball valve and the first high-precision flowmeter are both connected with the water inlet steel pipe through flanges; the water inlet pipe is connected with the simulation shaft through a transition hose, and two ends of the transition hose are provided with high-pressure hose joints which are respectively connected with a water inlet steel pipe welded with a welding wire and an upper connecting flange in the simulation shaft;
an annular pipe, a sliding sealing joint, a sliding sealing sleeve, an upper connecting flange, a lower connecting flange and an intelligent wireless water distributor are arranged corresponding to the simulation shaft; one side of the upper connecting flange is fixed with the welding wire in a welding mode, a core jack is arranged at the bottom of the welding wire, a core plug is fixed in the core jack in a sealing mode through threaded connection and an O-shaped ring, one end of the core plug is outwards used as a transmitting antenna during experiments, and the other end of the core plug is communicated with the inside of the intelligent wireless water distributor through a conducting wire, so that data communication between the intelligent wireless water distributor and the outside of the simulated well barrel is achieved, and underground bidirectional remote wireless communication on the intelligent wireless water distributor is simulated; the other side of the upper connecting flange is welded with a sliding sealing joint, the sliding sealing joint is in clearance fit with a sliding sealing sleeve pipe through a shaft hole, and the sliding sealing sleeve pipe is connected with an upper joint of the intelligent wireless water distributor through threads; the sliding sealing joint is inserted in the sliding sealing sleeve and realizes sealing through the O-shaped ring group, wherein the sliding sealing joint can linearly reciprocate in the sliding sealing sleeve so as to realize flexible connection of the intelligent wireless water distributor and avoid the problem of thread damage caused by water flow impact vertical vibration in a simulated shaft of the intelligent wireless water distributor; one end of the lower connecting flange is welded with a male buckle connector and is connected with a lower connector of the intelligent wireless water distributor through threads, and the other end of the lower connecting flange is welded with the backflow steel pipe; the lower part of the annular tube is provided with a mounting hole which is assembled with a stratum steel tube in a welding way, the production process that injected water enters the stratum after entering the intelligent wireless water distributor and being regulated in flow is simulated, and the annular perforation of underground water injection is simulated;
a backflow pressure gauge, a backflow steel pipe, a second high-pressure ball valve and a second high-precision flowmeter are arranged corresponding to the backflow pipeline; after the injected water enters the intelligent wireless water distributor, one part of the injected water is injected into the annular pipe through the intelligent wireless water distributor and then flows into the simulated formation pipeline, and the other part of the injected water enters the backflow pipeline along the flow channel of the intelligent wireless water distributor and sequentially passes through the backflow pressure gauge, the second high-precision flow meter and the second high-pressure ball valve; the backflow pressure gauge is used for measuring water injection pressure, is in sealing connection with a backflow pressure gauge mounting hole in the backflow steel pipe through conical threads, and the second high-pressure ball valve and the second high-precision flowmeter are both connected with the backflow steel pipe through flanges;
a formation pressure gauge, a third high-precision flowmeter, a formation steel pipe and an annular pipe are arranged corresponding to the simulated formation pipeline; the stratum steel pipe and the annular hollow pipe are welded to realize the sealing of an interface, water in the annular hollow pipe flows into the stratum steel pipe, and the pressure behind the nozzle and the water injection flow of the intelligent wireless water distributor are measured sequentially through a stratum pressure gauge and a third high-precision flow meter; wherein the formation pressure gauge and the pressure gauge mounting hole on the formation steel pipe are connected in a sealing way through taper threads, and the third high-precision flow meter is connected with the formation steel pipe through a flange.
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| CN113514241B (en) * | 2021-07-07 | 2024-04-09 | 中国石油化工股份有限公司 | Testing device for characteristic parameters of underground water distributor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9378310B2 (en) * | 2011-10-13 | 2016-06-28 | Los Alamos National Security, Llc | Material point method modeling in oil and gas reservoirs |
| US10900344B2 (en) * | 2017-11-07 | 2021-01-26 | Saudi Arabian Oil Company | Determining wellbore leak crossflow rate between formations in an injection well |
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2019
- 2019-12-12 CN CN201911278000.7A patent/CN110965971B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2003036041A2 (en) * | 2001-10-24 | 2003-05-01 | Shell Internationale Research Maatschappij B.V. | In situ recovery from a hydrocarbon containing formation using barriers |
| CN203347763U (en) * | 2013-07-18 | 2013-12-18 | 黑龙江百世永华流体设备有限公司 | Scattered oilfield flooding booster and water distribution intelligent integration device |
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