CN114109378B - Experimental device and method system capable of simulating well test analysis of complex reservoir in series and parallel - Google Patents
Experimental device and method system capable of simulating well test analysis of complex reservoir in series and parallel Download PDFInfo
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- CN114109378B CN114109378B CN202111432181.1A CN202111432181A CN114109378B CN 114109378 B CN114109378 B CN 114109378B CN 202111432181 A CN202111432181 A CN 202111432181A CN 114109378 B CN114109378 B CN 114109378B
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- 238000012360 testing method Methods 0.000 title claims abstract description 90
- 238000004458 analytical method Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title abstract description 29
- 239000004576 sand Substances 0.000 claims abstract description 185
- 238000004088 simulation Methods 0.000 claims abstract description 45
- 230000005465 channeling Effects 0.000 claims abstract description 18
- 239000011229 interlayer Substances 0.000 claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 231
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 175
- 238000007789 sealing Methods 0.000 claims description 61
- 238000002347 injection Methods 0.000 claims description 54
- 239000007924 injection Substances 0.000 claims description 54
- 239000006004 Quartz sand Substances 0.000 claims description 47
- 239000010410 layer Substances 0.000 claims description 24
- 239000002131 composite material Substances 0.000 claims description 21
- 238000002474 experimental method Methods 0.000 claims description 6
- 239000000945 filler Substances 0.000 claims description 2
- 230000008569 process Effects 0.000 abstract description 21
- 238000011161 development Methods 0.000 abstract description 7
- 230000006870 function Effects 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 description 14
- 239000012530 fluid Substances 0.000 description 10
- 230000035699 permeability Effects 0.000 description 8
- 230000000704 physical effect Effects 0.000 description 5
- 230000008021 deposition Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000011362 coarse particle Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000010419 fine particle Substances 0.000 description 3
- 230000033764 rhythmic process Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
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- 230000006866 deterioration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 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
- 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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- 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
- E21B47/10—Locating fluid leaks, intrusions or movements
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Abstract
The invention provides an experimental device and a method system for simulating complex reservoir well test analysis in series and parallel, which can rapidly realize the well test process of simulating various complex reservoirs through the series and parallel arrangement of a plurality of independent sand filling cylinders, has low cost, simple operation, strong independence and comprehensive functions, and effectively aims at well test simulation of various complex reservoirs with transverse heterogeneity, longitudinal heterogeneity, interlayer channeling and large karst cave development.
Description
Technical Field
The invention relates to the technical field of oil and gas field development experiments, in particular to an experimental device and method system for simulating complex reservoir well test analysis, and particularly relates to a series-parallel simulated complex reservoir well test analysis.
Background
The well test is a most common and effective reservoir dynamic monitoring method for obtaining the parameters of the test well and the stratum by using a pressure gauge to perform pressure test on the test well and analyzing test data. In the well test process, an exciting well and an observation well can be selected, after the working condition of the exciting well is changed, an unstable pressure change phenomenon can occur at the position of the observation well, the pressure change data of the observation well is recorded, and the reservoir parameters and the flow parameters between wells can be calculated from the test data of the pressure and the observation time of the observation well. But the field well test needs to have higher test time, and the shut-in and shut-out have higher production operation cost. At present, few experimental devices for determining reservoir physical properties by adopting a well test analysis method in a laboratory are provided, and no report on experimental devices and methods for demonstrating complex reservoir well test analysis exists. The conventional homogeneous reservoir well test analysis experimental device cannot simulate well test processes of various complex reservoirs with transverse heterogeneity, longitudinal heterogeneity, interlayer fluid channeling and large karst cave development, and how to design a test device and simply and quickly realize the well test processes of simulating various complex reservoirs becomes a key point of design research.
Disclosure of Invention
The invention aims to solve the technical problems that: in order to overcome the defects of the prior art, the invention provides an experimental device and a method system for simulating complex reservoir well testing analysis in series and parallel connection.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides an experimental apparatus that can connect in series parallelly connected complicated reservoir well test analysis, includes water filling pipeline, water outlet pipeline and a plurality of are individual fills sand section of thick bamboo, individual fill sand section of thick bamboo include box, sealed inner cup and sealed enclosing cover, sealed inner cup crimping be at the box top, sealed enclosing cover housing is outside sealed inner cup and with sealed inner cup and box shrink into fixedly, sealed inner cup top be connected with two water filling ports, be A water filling port and B water filling port respectively through the control valve, the box bottom then external relief valve and connect out and have the delivery port, be A delivery port and B delivery port respectively for every water filling port, A water filling port and A delivery port between communicate through analog pipeline, this analog pipeline is analog pit A, B water filling port and B delivery port between communicate through analog pipeline, this analog pipeline is analog pit B, water filling port top correspond respectively and be equipped with wellhead pressure gauge, box bottom and correspond analog pipeline below and then be equipped with bottom hole pressure memory.
The independent sand filling cylinder can be independently used for simulating a homogeneous reservoir, and the experimental device has strong independence and high availability. After the independent sand filling cylinder is filled with quartz sand, the parallel independent sand filling cylinder is used for simulating multi-layer reservoir production, so that real reservoir rock samples with various permeability are not needed, and the experimental cost is low. The independent sand filling cylinders only need to be filled with quartz sand with uniform particle size, and the longitudinal heterogeneous reservoir is simulated by connecting the independent sand filling cylinders in parallel, so that the connection mode is simple, and the experimental operability is strong. The independent sand filling cylinders connected in series and in parallel can simulate reservoirs with transverse heterogeneity, longitudinal heterogeneity, interlayer channeling and large karst cave development, can simulate the well testing process of various multi-layer mining reservoirs at present, and has comprehensive functions.
The experimental method of the experimental device capable of simulating the well test analysis of the complex reservoir in series and parallel connection is adopted, and after each independent sand filling cylinder is connected in series or parallel connection through a pipeline, the experimental device capable of simulating the well test analysis of the complex reservoir in series and parallel connection is adopted to simulate the well test of the complex reservoir.
When simulating multilayer combined production reservoir well test without interlayer channeling, a plurality of independent sand filling barrels are sequentially arranged, quartz sand is filled in each independent sand filling barrel, A water filling ports of each independent sand filling barrel are respectively communicated with a water filling pipeline through pipelines, and B water filling ports of each independent sand filling barrel are respectively communicated with a water outlet pipeline through pipelines.
When a multi-layer combined production reservoir well test with interlayer cross flow is simulated, a plurality of independent sand filling barrels are sequentially arranged, quartz sand is filled in each independent sand filling barrel, an A water filling port of each independent sand filling barrel is respectively communicated with a water filling pipeline through a pipeline, and a B water filling port is respectively communicated with a water outlet pipeline through a pipeline; the water outlet A of the former independent sand filling cylinder is communicated with the water outlet A of the latter independent sand filling cylinder, and the water outlet B of the former independent sand filling cylinder is communicated with the water outlet B of the latter independent sand filling cylinder.
When simulating the well test of the compound reservoir of multizone, a plurality of independent sand filling barrels are arranged in proper order, each independent sand filling barrel is filled with quartz sand, the A water injection port of the first independent sand filling barrel is communicated with a water injection pipeline through a pipeline, the B water injection port of the former independent sand filling barrel is communicated with the A water injection port pipeline of the latter independent sand filling barrel through a pipeline, and the B water injection port of the last independent sand filling barrel is communicated with a water outlet pipeline.
When the well test of the multi-zone composite reservoir is simulated and interfacial resistance exists, the independent sand filling cylinders are divided into two groups, the two groups of independent sand filling cylinders are distributed in a staggered manner, the first group of independent sand filling cylinders are filled with quartz sand and are sequentially arranged, and the second group of independent sand filling cylinders are filled with water and are sequentially arranged; in the first group of independent sand filling barrels, an A water injection port of the first independent sand filling barrel is communicated with a water injection pipeline through a pipeline, a B water injection port of the first independent sand filling barrel is communicated with an A water injection port pipeline of the second independent sand filling barrel through a pipeline, and a B water injection port of the last independent sand filling barrel is communicated with a water outlet pipeline; in the second group of independent sand filling barrels, each independent sand filling barrel is correspondingly distributed between two adjacent independent sand filling barrels of the first group of independent sand filling barrels, an A water filling port of each independent sand filling barrel in the second group of independent sand filling barrels is connected with a B water outlet of the independent sand filling barrel filled with quartz sand in the previous group of independent sand filling barrels through pipeline pipelines, and the B water filling port is connected with an A water outlet of the independent sand filling barrel filled with quartz sand in the next group of independent sand filling barrels through pipeline pipelines.
When simulating a well test of a fracture-cavity type reservoir with a fracture-cavity body, a plurality of independent sand filling cylinders are sequentially arranged, the fillers in two adjacent independent sand filling cylinders are different, water or quartz sand is respectively filled in a staggered manner according to the cylinders, and quartz sand is filled in the first independent sand filling cylinder; the water injection port A of the first independent sand filling cylinder is communicated with a water injection pipeline through a pipeline, the water injection port B of the former independent sand filling cylinder is communicated with the water injection port A of the latter independent sand filling cylinder through a pipeline, and the water injection port B of the last independent sand filling cylinder is communicated with a water outlet pipeline.
When simulating the well test of a multilayer multi-zone composite reservoir without interlayer channeling, dividing a plurality of independent sand filling cylinders into at least three groups, wherein the number of each group of independent sand filling cylinders is the same, and the independent sand filling cylinders are in one-to-one correspondence with other groups of independent sand filling cylinders and are sequentially distributed; the water inlet A of each independent sand filling cylinder in the first group of independent sand filling cylinders is communicated with a water inlet pipeline through a pipeline; the water filling port A of each independent sand filling cylinder in the later group of independent sand filling cylinders is communicated with the water filling port B of the corresponding independent sand filling cylinder in the former group through a pipeline; and the water filling port B of each independent sand filling cylinder in the last group of independent sand filling cylinders is communicated with a water outlet pipeline through a pipeline.
When simulating a well test of a multi-layer multi-region composite reservoir with interlayer channeling, dividing a plurality of independent sand filling cylinders into at least three groups, wherein the number of each group of independent sand filling cylinders is the same, and the independent sand filling cylinders are in one-to-one correspondence with other groups of independent sand filling cylinders and are sequentially distributed; the water inlet A of each independent sand filling cylinder in the first group of independent sand filling cylinders is communicated with a water inlet pipeline through a pipeline; the water filling port A of each independent sand filling cylinder in the later group of independent sand filling cylinders is communicated with the water filling port B of the corresponding independent sand filling cylinder in the former group through a pipeline; the water filling port B of each independent sand filling cylinder in the last group of independent sand filling cylinders is communicated with a water outlet pipeline through a pipeline; in each group of independent sand filling cylinders, the water outlet A of the former independent sand filling cylinder is communicated with the water outlet A of the latter independent sand filling cylinder through a pipeline, and the water outlet B of the former independent sand filling cylinder is communicated with the water outlet B of the latter independent sand filling cylinder through a pipeline.
The experimental device and the method system for simulating the well testing analysis of the complex reservoir in series and parallel have the beneficial effects that the well testing process of simulating various complex reservoirs can be rapidly realized through the series and parallel arrangement of the independent sand filling cylinders, the experimental device is low in cost, simple to operate, strong in independence and comprehensive in function, and the well testing simulation of various complex reservoirs with transverse non-uniformity, longitudinal non-uniformity, interlayer channeling and large karst cave can be effectively realized.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic structural view of an independent sand filling cylinder of the present invention.
FIG. 2 is a cross-sectional view of the stand-alone sand filling cartridge of the present invention.
FIG. 3 is a schematic diagram of the piping used in the present invention to simulate a multi-layer joint production reservoir well test without cross-flow between layers.
FIG. 4 is a schematic diagram of the pipeline connection of a multi-layer co-production reservoir well test for simulating the existence of inter-layer fluid channeling in accordance with the present invention.
FIG. 5 is a schematic of a pipeline connection for simulating a well test of a multi-zone composite reservoir according to the present invention.
FIG. 6 is a schematic diagram of the pipeline connection of the present invention for simulating a well test of a multi-zone composite reservoir with interfacial resistance.
FIG. 7 is a schematic illustration of a pipeline connection for simulating a test well of a fracture-cave reservoir with a fracture-cave body in accordance with the present invention.
FIG. 8 is a schematic of a pipeline connection of a well test of a multi-zone composite reservoir for simulating an interlaminar fluid channeling free of zones in accordance with the invention.
FIG. 9 is a schematic of a pipeline connection for a well test simulating a multi-zone composite reservoir with cross-zone fluid channeling therebetween in accordance with the present invention.
In the figure, 1, a water filling port 2, a water filling port 3, a water outlet 4, a water outlet 5, a sealing inner cover 6, a sealing outer cover 7, a box body 8, a pressure release valve 9, a simulation pipeline 10, a control valve 11, a bottom hole pressure storage 12, a water filling pipeline 13 and a water outlet pipeline.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only those features which are relevant to the invention, and orientation and reference (e.g., up, down, left, right, etc.) may be used solely to aid in the description of the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.
An experimental device capable of simulating well test analysis of a complex reservoir in series and parallel connection comprises a water injection pipeline 12, a water outlet pipeline 13 and a plurality of independent sand filling cylinders.
As shown in fig. 1 and 2, the independent sand-filling barrel comprises a box body 7, a sealing inner cover 5 and a sealing outer cover 6, wherein the sealing inner cover 5 is pressed on the top of the box body 7, the sealing outer cover 6 is covered outside the sealing inner cover 5, and the sealing inner cover 5 and the box body 7 are retracted and fixed. In the independent sand filling cylinder, the sealing inner cover 5 and the box body 7 are sealed by a sealing ring and a sealing gasket. The top of the sealing inner cover 5 is connected with two water filling ports, namely an A water filling port 1 and a B water filling port 2 through a control valve 10, the bottom of the box 7 is externally connected with a pressure relief valve 8, a water outlet is connected to each water filling port, namely an A water outlet 3 and a B water outlet 4, the A water filling port 1 and the A water outlet 3 are communicated through a simulation pipeline 9, the simulation pipeline 9 is a simulation shaft A, the B water filling port 2 is communicated with the B water outlet 4 through a simulation pipeline 9, and the simulation pipeline 9 is a simulation shaft B. In practical design, in order to ensure pipeline safety, the outer peripheral surface of the simulation pipeline 9 is also wrapped with a shakeout cushion layer. The top of the water filling port is correspondingly provided with a wellhead pressure gauge, and the bottom of the box body 7 is correspondingly provided with a bottom hole pressure storage 11 below the simulation pipeline 9.
By adopting the experimental device capable of simulating the well test analysis of the complex reservoir in series and parallel connection, after each independent sand filling cylinder is connected in series or parallel connection through the pipeline, the well test of the complex reservoir can be simulated. The specific experimental steps are as follows:
1. in the independent sand filling cylinder, an exciting well and an observation well are respectively simulated by two simulated shafts, a sand prevention cushion layer is arranged outside the simulated shafts to prevent filling sand from entering the shafts, a wellhead pressure gauge is used for displaying wellhead pressure change, and control valves 10 of two water filling ports are used for controlling water filling, stopping and the like. After the pressure release valve 8 at the bottom of the device is closed, a quartz sand simulation homogeneous reservoir with a preselected particle size can be filled in the box body 7, or a fluid source for fluid simulation reservoir development large karst cave or interlayer channeling is flushed in the cavity of the box body 7. Sealing between the sealing inner cover 5, the box body 7 and the cavity filling sand body is realized through the sealing gasket and the sealing ring, and finally the sealing outer cover 6 realizes the sealing of the whole device.
Step 2: and the water inlets and the water outlets of a plurality of independent sand filling cylinders are connected through pipelines in a serial and parallel connection mode, so that various preselected complex reservoir well test analysis devices are simulated in sequence.
Step 3: the working system of the exciting well is changed by controlling the water injection and the stop injection of the valve 10, and the data of the bottom hole pressure storage 11 of the observation well and the data of the observation time are output, wherein the data can be used for calculating reservoir physical property parameters and inter-well flow parameters.
Through a plurality of independent sand filling cylinders connected in series and in parallel, the reservoir with transverse heterogeneity, longitudinal heterogeneity, interlayer channeling and large karst cave development can be simulated, the current various multi-layer reservoir well test processes can be simulated, and the experimental device has comprehensive functions. The concrete steps are as follows: (1) after each independent sand filling cylinder is connected in series, the multi-zone composite reservoir with transverse heterogeneous characteristics can be simulated; (2) after each independent sand filling cylinder is connected in parallel, a multi-layer combined production reservoir with longitudinal heterogeneous characteristics can be simulated; (3) after the bottoms of the independent sand filling cylinders are connected in parallel, a multi-layer combined production reservoir layer with layers can be simulated; (4) the fluid filled in the sand filling cylinders is connected with each independent sand filling cylinder in series, so that a fracture-cavity type carbonate reservoir of a large karst cave can be simulated to develop in the reservoir; (5) each independent sand filling cylinder can simulate a multi-zone multi-layer laminated reservoir through a serial connection and parallel connection combination mode.
As shown in FIG. 3, the experimental device can be used for simulating multi-layer combined production reservoir well test without interlayer cross flow by changing the wiring mode. The simulation steps are as follows:
(1) selecting coarse, medium and fine 3 kinds of quartz sand, and respectively simulating high, medium and low 3 kinds of permeability reservoirs;
(2) filling 3 kinds of quartz sand into the inner cavities of the boxes of the 3 independent sand filling cylinders respectively, compacting the filled quartz sand, and then covering a sealing cover for sealing;
(3) placing independent sand filling cylinders filled with fine, medium and coarse quartz sand in sequence, completing the connection of pipelines in a parallel manner according to FIG. 3, and simulating the multi-layer combined production reservoir well test process of positive rhythm deposition characteristics;
similarly, sand filling cylinders filled with coarse, medium and fine quartz sand are sequentially placed, the connection of pipelines is completed in a parallel mode according to fig. 3, and the multi-layer combined production reservoir well testing process of the reverse rhythm deposition characteristic is simulated.
As shown in FIG. 4, the experimental device can be used for simulating multi-layer combined production reservoir well test with interlayer channeling by changing the wiring mode. The simulation steps are as follows:
(1) selecting coarse, medium and fine 3 kinds of quartz sand, and respectively simulating high, medium and low 3 kinds of permeability reservoirs;
(2) 3 kinds of quartz sand are respectively filled into 3 independent sand filling cylinders
After compacting the filled quartz sand, covering a sealing cover for sealing;
(3) sequentially placing sand filling cylinders filled with fine, medium and coarse quartz sand, completing connection of pipelines in a parallel manner according to FIG. 4, and simulating a multilayer crossflow combined production reservoir well testing process of positive rhythm deposition characteristics;
similarly, sand filling cylinders filled with coarse, medium and fine quartz sand are sequentially placed, the connection of pipelines is completed in a parallel mode according to fig. 4, and the multilayer crossflow combined production reservoir well testing process of the anti-prosodic deposition characteristic is simulated.
As shown in FIG. 5, the experimental apparatus described above may be used to simulate well testing of a multi-zone composite reservoir by changing the wiring scheme. The simulation steps are as follows:
(1) selecting coarse, medium and fine 3 kinds of quartz sand to simulate high, medium and low 3 kinds of permeability reservoirs;
(2) filling 3 kinds of quartz sand into the inner cavities of the boxes of the 3 independent sand filling cylinders respectively, compacting the filled quartz sand, and then covering a sealing cover for sealing;
(3) sequentially placing sand filling cylinders filled with fine, medium and coarse quartz sand, completing connection of pipelines in a serial manner according to FIG. 5, and simulating a multi-zone composite reservoir well testing process with good transverse objects;
similarly, sand filling cylinders filled with coarse, medium and fine quartz sand are sequentially placed, the connection of pipelines is completed in a serial mode according to fig. 5, and the multi-zone composite reservoir well testing process of the transverse physical property deterioration is simulated.
As shown in FIG. 6, the experimental apparatus described above may be used to simulate well testing of a multi-zone composite reservoir when interfacial resistance is present by changing the wiring scheme. The simulation steps are as follows:
(1) selecting coarse, medium and fine 3 kinds of quartz sand, respectively simulating high, medium and low 3 kinds of permeability reservoirs, and simultaneously simulating a reservoir with large holes by using an unfilled sand filling cylinder;
(2) filling 3 kinds of quartz sand into the inner cavity of the box of the first group of 3 independent sand filling cylinders respectively, compacting the filled quartz sand, and then covering a sealing cover for sealing;
(3) directly sealing a second group of sand filling cylinders which are not filled with sand bodies, and filling the water body;
(4) the 5 sand filling cylinders filled with fine particles, water, middle particles, water and coarse particles are placed in sequence, the connection of pipelines is completed according to the serial connection mode of fig. 6, and the multi-zone composite reservoir well testing process with good transverse physical properties and interfacial resistance is simulated;
similarly, 5 sand-filling drums filled with fine particles, water, middle particles, water and coarse particles are placed in sequence, the connection of pipelines is completed in a serial manner according to fig. 6, and the multi-zone composite reservoir well test process with poor transverse physical properties and interfacial resistance is simulated.
As shown in FIG. 7, the experimental apparatus can be used to simulate the well test of a fracture-cavity type reservoir with a fracture-cavity body by changing the wiring mode. The simulation steps are as follows:
(1) selecting coarse and fine 2 kinds of quartz sand, respectively simulating high and low 2 kinds of permeability reservoirs, and simultaneously simulating a reservoir with large holes by using an unfilled sand filling cylinder;
(2) filling 2 kinds of quartz sand into the inner cavities of the 2 independent sand filling cylinders respectively, compacting the filled quartz sand, and then covering a sealing cover for sealing;
(3) the independent sand filling cylinder without filling the sand body is directly sealed and then filled with water;
(4) the 3 independent sand filling cylinders filled with fine particles, water and coarse particles are placed in sequence, the connection of pipelines is completed in a serial mode according to fig. 7, and the fracture-cavity type carbonate reservoir well testing process with large karst cavity is simulated.
As shown in FIG. 8, the experimental apparatus described above may be used to simulate well testing of a multi-zone composite reservoir without cross-zone fluid flow by changing the wiring scheme. The simulation steps are as follows:
(1) selecting coarse, medium and fine 3 kinds of quartz sand, and respectively simulating high, medium and low 3 kinds of permeability reservoirs;
(2) filling 3 kinds of quartz sand into the inner cavities of the boxes of the 9 independent sand filling cylinders respectively, compacting the filled quartz sand, and then covering a sealing cover for sealing;
(3) the independent sand filling cylinders filled with fine, medium and coarse quartz sand are placed in three groups in sequence, each group is filled with fine, medium and coarse quartz sand respectively, the connection of pipelines is completed in a parallel mode according to fig. 8, and the multi-layer multi-zone composite reservoir well testing process is simulated.
As shown in fig. 9, the experimental apparatus can be used to simulate the well test of a multi-layer multi-zone composite reservoir with interlaminar fluid channeling by changing the wiring mode. The simulation steps are as follows:
(1) selecting coarse, medium and fine 3 kinds of quartz sand, and respectively simulating high, medium and low 3 kinds of permeability reservoirs;
(2) filling 3 kinds of quartz sand into the inner cavities of the boxes of the 9 independent sand filling cylinders respectively, compacting the filled quartz sand, and then covering a sealing cover for sealing;
(3) the independent sand filling cylinders filled with fine, medium and coarse quartz sand are placed in three groups in sequence, each group is filled with fine, medium and coarse quartz sand respectively, the connection of pipelines is completed in a parallel mode according to fig. 9, and the multi-layer multi-zone composite reservoir well test process with interlayer channeling is simulated.
In the simulation process, the independent sand filling cylinders for simulating a plurality of uniform reservoirs in series and parallel can simulate the reservoirs with transverse heterogeneity, longitudinal heterogeneity, interlayer fluid channeling and large karst cave development, and can simulate the well testing process of various multi-layer mining reservoirs at present, the experimental device has comprehensive functions, the well testing process for simulating various complex reservoirs can be simply and rapidly realized, the experimental device has low cost, simple operation, strong independence and comprehensive functions.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (4)
1. An experimental method of an experimental device capable of simulating well test analysis of a complex reservoir in series and parallel connection is characterized by comprising the following steps of: an experimental device capable of simulating well test analysis of a complex reservoir in series and parallel connection is adopted, and after each independent sand filling cylinder is connected in series or parallel connection through a pipeline, the well test of the complex reservoir is simulated;
the experimental device capable of simulating complex reservoir well test analysis in series and parallel comprises a water injection pipeline (12), a water outlet pipeline (13) and a plurality of independent sand filling barrels, wherein each independent sand filling barrel comprises a box body (7), a sealing inner cover (5) and a sealing outer cover (6), the sealing inner cover (5) is pressed on the top of the box body (7), the sealing outer cover (6) is covered outside the sealing inner cover (5) and is used for retracting and fixing the sealing inner cover (5) and the box body (7), the top of the sealing inner cover (5) is connected with two water injection ports through a control valve (10), the water injection ports A and B are respectively connected with a water injection port (2), the bottom of the box body (7) is externally connected with a pressure relief valve (8) and is respectively connected with a water outlet A water outlet (3) and a water outlet (4) corresponding to each water injection port, the A water outlet (3) is respectively communicated with the A water outlet (3) through a simulation pipeline (9), the simulation pipeline (9) is a simulation well bore A, the water outlet (2) and the bottom of the box (4) are respectively communicated with a simulation well bore (9) through a simulation pipeline (9), and the bottom of the well bore (7) is correspondingly provided with a simulation well bore (11);
when the well test of the multi-zone composite reservoir is simulated and interfacial resistance exists, the independent sand filling cylinders are divided into two groups, the two groups of independent sand filling cylinders are distributed in a staggered manner, the first group of independent sand filling cylinders are filled with quartz sand and are sequentially arranged, and the second group of independent sand filling cylinders are filled with water and are sequentially arranged; in the first group of independent sand filling barrels, an A water injection port (1) of the first independent sand filling barrel is communicated with a water injection pipeline (12) through a pipeline, a B water injection port (2) of the former independent sand filling barrel is communicated with an A water injection port (1) of the latter independent sand filling barrel through a pipeline, and a B water injection port (2) of the last independent sand filling barrel is communicated with a water outlet pipeline (13); in the second group of independent sand filling barrels, each independent sand filling barrel is correspondingly distributed between two adjacent independent sand filling barrels of the first group of independent sand filling barrels, an A water injection port (1) of each independent sand filling barrel in the second group of independent sand filling barrels is connected with a B water outlet (4) of the independent sand filling barrel filled with quartz sand in the previous time through a pipeline, and a B water injection port (2) is connected with an A water outlet (3) of the independent sand filling barrel filled with quartz sand in the next time through a pipeline.
2. An experimental method of an experimental device capable of simulating well test analysis of a complex reservoir in series and parallel connection is characterized by comprising the following steps of: an experimental device capable of simulating well test analysis of a complex reservoir in series and parallel connection is adopted, and after each independent sand filling cylinder is connected in series or parallel connection through a pipeline, the well test of the complex reservoir is simulated;
the experimental device capable of simulating complex reservoir well test analysis in series and parallel comprises a water injection pipeline (12), a water outlet pipeline (13) and a plurality of independent sand filling barrels, wherein each independent sand filling barrel comprises a box body (7), a sealing inner cover (5) and a sealing outer cover (6), the sealing inner cover (5) is pressed on the top of the box body (7), the sealing outer cover (6) is covered outside the sealing inner cover (5) and is used for retracting and fixing the sealing inner cover (5) and the box body (7), the top of the sealing inner cover (5) is connected with two water injection ports through a control valve (10), the water injection ports A and B are respectively connected with a water injection port (2), the bottom of the box body (7) is externally connected with a pressure relief valve (8) and is respectively connected with a water outlet A water outlet (3) and a water outlet (4) corresponding to each water injection port, the A water outlet (3) is respectively communicated with the A water outlet (3) through a simulation pipeline (9), the simulation pipeline (9) is a simulation well bore A, the water outlet (2) and the bottom of the box (4) are respectively communicated with a simulation well bore (9) through a simulation pipeline (9), and the bottom of the well bore (7) is correspondingly provided with a simulation well bore (11);
when simulating a well test of a fracture-cavity type reservoir with a fracture-cavity body, a plurality of independent sand filling cylinders are sequentially arranged, the fillers in two adjacent independent sand filling cylinders are different, water or quartz sand is respectively filled in a staggered manner according to the cylinders, and quartz sand is filled in the first independent sand filling cylinder; the water injection port A (1) of the first independent sand filling cylinder is communicated with a water injection pipeline (12) through a pipeline, the water injection port B (2) of the former independent sand filling cylinder is communicated with the water injection port A (1) of the latter independent sand filling cylinder through a pipeline, and the water injection port B (2) of the last independent sand filling cylinder is communicated with a water outlet pipeline (13).
3. An experimental method of an experimental device capable of simulating well test analysis of a complex reservoir in series and parallel connection is characterized by comprising the following steps of: an experimental device capable of simulating well test analysis of a complex reservoir in series and parallel connection is adopted, and after each independent sand filling cylinder is connected in series or parallel connection through a pipeline, the well test of the complex reservoir is simulated;
the experimental device capable of simulating complex reservoir well test analysis in series and parallel comprises a water injection pipeline (12), a water outlet pipeline (13) and a plurality of independent sand filling barrels, wherein each independent sand filling barrel comprises a box body (7), a sealing inner cover (5) and a sealing outer cover (6), the sealing inner cover (5) is pressed on the top of the box body (7), the sealing outer cover (6) is covered outside the sealing inner cover (5) and is used for retracting and fixing the sealing inner cover (5) and the box body (7), the top of the sealing inner cover (5) is connected with two water injection ports through a control valve (10), the water injection ports A and B are respectively connected with a water injection port (2), the bottom of the box body (7) is externally connected with a pressure relief valve (8) and is respectively connected with a water outlet A water outlet (3) and a water outlet (4) corresponding to each water injection port, the A water outlet (3) is respectively communicated with the A water outlet (3) through a simulation pipeline (9), the simulation pipeline (9) is a simulation well bore A, the water outlet (2) and the bottom of the box (4) are respectively communicated with a simulation well bore (9) through a simulation pipeline (9), and the bottom of the well bore (7) is correspondingly provided with a simulation well bore (11);
when simulating the well test of a multilayer multi-zone composite reservoir without interlayer channeling, dividing a plurality of independent sand filling cylinders into at least three groups, wherein the number of each group of independent sand filling cylinders is the same, and the independent sand filling cylinders are in one-to-one correspondence with other groups of independent sand filling cylinders and are sequentially distributed; the water inlet A of each independent sand filling cylinder in the first group of independent sand filling cylinders is communicated with a water inlet pipeline through a pipeline; the water injection port A (1) of each independent sand filling cylinder in the later group of independent sand filling cylinders is communicated with the water injection port B (2) of the corresponding independent sand filling cylinder in the former group through a pipeline; the water filling port B (2) of each independent sand filling cylinder in the last group of independent sand filling cylinders is communicated with a water outlet pipeline (13) through a pipeline.
4. An experimental method of an experimental device capable of simulating well test analysis of a complex reservoir in series and parallel connection is characterized by comprising the following steps of: an experimental device capable of simulating well test analysis of a complex reservoir in series and parallel connection is adopted, and after each independent sand filling cylinder is connected in series or parallel connection through a pipeline, the well test of the complex reservoir is simulated;
the experimental device capable of simulating complex reservoir well test analysis in series and parallel comprises a water injection pipeline (12), a water outlet pipeline (13) and a plurality of independent sand filling barrels, wherein each independent sand filling barrel comprises a box body (7), a sealing inner cover (5) and a sealing outer cover (6), the sealing inner cover (5) is pressed on the top of the box body (7), the sealing outer cover (6) is covered outside the sealing inner cover (5) and is used for retracting and fixing the sealing inner cover (5) and the box body (7), the top of the sealing inner cover (5) is connected with two water injection ports through a control valve (10), the water injection ports A and B are respectively connected with a water injection port (2), the bottom of the box body (7) is externally connected with a pressure relief valve (8) and is respectively connected with a water outlet A water outlet (3) and a water outlet (4) corresponding to each water injection port, the A water outlet (3) is respectively communicated with the A water outlet (3) through a simulation pipeline (9), the simulation pipeline (9) is a simulation well bore A, the water outlet (2) and the bottom of the box (4) are respectively communicated with a simulation well bore (9) through a simulation pipeline (9), and the bottom of the well bore (7) is correspondingly provided with a simulation well bore (11);
when simulating a well test of a multi-layer multi-region composite reservoir with interlayer channeling, dividing a plurality of independent sand filling cylinders into at least three groups, wherein the number of each group of independent sand filling cylinders is the same, and the independent sand filling cylinders are in one-to-one correspondence with other groups of independent sand filling cylinders and are sequentially distributed; the water inlet A of each independent sand filling cylinder in the first group of independent sand filling cylinders is communicated with a water inlet pipeline through a pipeline; the water injection port A (1) of each independent sand filling cylinder in the later group of independent sand filling cylinders is communicated with the water injection port B (2) of the corresponding independent sand filling cylinder in the former group through a pipeline; the water filling port B (2) of each independent sand filling cylinder in the last group of independent sand filling cylinders is communicated with a water outlet pipeline (13) through a pipeline; in each group of independent sand filling barrels, an A water outlet (3) of the former independent sand filling barrel is communicated with an A water outlet (3) of the latter independent sand filling barrel through a pipeline, and a B water outlet (4) of the former independent sand filling barrel is communicated with a B water outlet (4) of the latter independent sand filling barrel through a pipeline.
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