CN-121993163-A - Three-dimensional heterogeneous stratum water control oil extraction multi-parameter synchronous simulation experiment device

CN121993163ACN 121993163 ACN121993163 ACN 121993163ACN-121993163-A

Abstract

The invention relates to a three-dimensional heterogeneous stratum water control oil extraction multi-parameter synchronous simulation experiment device which comprises a device main body, a plug, a production pipe column and a sensor unit. The device body adopts a coaxial multilayer nested structure, an inner annular sand filling area is provided with a plurality of independent simulation units through replaceable sieve mesh partition plates to realize heterogeneous stratum reconstruction of 'fluid communication and sand isolation', a production pipe column adopts a modularized water control nipple joint serial structure to integrate a replaceable fluid sensitive valve and a tracer storage cabin to realize performance evaluation and fluid tracing of a multi-type water control tool, and a sensor unit is arranged in a three-dimensional mode through mandrels with various lengths to synchronously collect outlet, wall and radial gradient pressures and realize multi-dimensional data collaborative analysis by combining flow and water content monitoring. The invention solves the problems that the prior device is difficult to restore the physical characteristics of complex channeling and the monitoring dimension is single, realizes the full-flow high-fidelity simulation from stratum seepage to tool water control, and provides key technical support for water control strategy optimization.

Inventors

ZHANG NAN
DONG WANQI
LI HAITAO
LI YING
LUO HONGWEN
XIE FENGJUN
LEI ZHONGYU

Assignees

西南石油大学

Dates

Publication Date: 20260508
Application Date: 20260316

Claims (10)

1. The utility model provides a three-dimensional heterogeneous stratum accuse water oil recovery multiparameter synchronous simulation experiment device which characterized in that includes: The device comprises a device main body (1) which adopts a coaxial multilayer nested structure, and an annular sand filling area for reconstructing a heterogeneous stratum is formed in the device main body; plugs (2) arranged at two ends of the device main body (1) and used for sealing the device and guiding out fluid; The production pipe column (3) is coaxially arranged inside the device main body (1), adopts a modularized short section serial structure, is integrated with a water control test element and a tracer storage cabin, and The sensor unit (4) is arranged on the device main body (1) and is used for monitoring the internal pressure field distribution in real time; The device comprises a device main body (1), a production pipe column (3), a casing pipe (6) and an outer screen pipe (7), wherein two ends of the device main body (1) are respectively connected with the plug (2) through a device end cover (5) and a connecting flange (12), the production pipe column (3) is coaxially arranged inside the inner screen pipe (9), two ends of the production pipe column are assembled on the plug (2) through a tubing head (14), and a sensor unit (4) is installed on the casing pipe (6) and the outer screen pipe (7) of the device main body (1) through a sensor joint (25).
2. The device according to claim 1, characterized in that the device body (1) comprises: A sleeve (6) constituting the outermost layer of the device; The outer screen pipe (7) is coaxially sleeved on the inner side of the sleeve (6), and the outer screen pipe and the device end cover (5) are connected in a sealing manner to form an annular liquid distribution area; An inner screen pipe (9) coaxially sleeved on the inner side of the outer screen pipe (7), and the inner screen pipe and the outer screen pipe are in sealing connection with the device end cover (5) to form an annular sand filling area, and The sieve pore partition plate (8) is axially arranged in the annular sand filling area and divides the annular sand filling area into a plurality of independent simulation units; The sieve pore partition plate (8) is in a circular ring shape, the inner ring of the sieve pore partition plate is hermetically sleeved on the outer wall of the inner sieve tube (9), the outer ring of the sieve pore partition plate is connected to the inner wall of the outer sieve tube (7), sieve pores are uniformly distributed on the surface of the sieve pore partition plate, and the pore diameter of the sieve pore is smaller than the minimum particle diameter of experimental sand grains so as to realize the control of fluid communication and sand isolation.
3. The device according to claim 2, wherein the sieve pore partition plate (8) is of a replaceable structure, and is replaced by a blind plate or a sieve plate with different apertures according to experimental requirements so as to quantitatively regulate the interlayer channeling strength among the units, and sand filling holes (10) penetrating through the sleeve (6) and the outer sieve tube (7) are arranged at the top of each simulation unit and are used for independently filling sand bodies with different permeability to construct three-dimensional heterogeneity.
4. The device according to claim 1, wherein the plug (2) comprises: an outlet (13) for the fluid; -a tubing head (14) for connecting and securing the production string (3); A casing head flange (15) with an inner annular side wall connected with the inner screen pipe (9), and And the adjusting nut (16) is arranged at the bottom end of the casing head flange (15) and is used for connecting the device main body (1) and compensating the length machining deviation of the production pipe column (3) and simultaneously adjusting the axial displacement of the production pipe column (3) in the device.
5. The device according to claim 4, characterized in that the outlet (13) is connected to a high-precision mass flowmeter which is in communication connection with a data storage processing system via a communication interface for monitoring the integrated flow and water content in real time.
6. The device according to claim 1, wherein the production string (3) adopts a modularized short joint serial structure, and is formed by alternately connecting a plurality of water control short joints in series through a packer (23), and the packer (23) is used for sectionally isolating independent simulation units inside the inner screen (9); The water control nipple comprises an end water control nipple (17) and a middle water control nipple (24), and both comprise a nipple base pipe (21), a sleeve (18) sleeved outside the nipple base pipe (21), a replaceable fluid sensitive valve (22) integrated on the pipe wall of the nipple base pipe (21) and a built-in tracer storage cabin (19); The sleeve (18) is in sealing connection with the end part of the short-joint base pipe (21) through sealing rings (20-2, 20-3), a slit is formed in a sleeve section between the two sealing rings, and the fluid sensitive valve (22) is correspondingly arranged in the slit section; the pipe nipple base pipe (21-2) of the middle water control pipe nipple (24) is an equal-diameter pipe, and the pipe diameter of the end part of the pipe nipple base pipe (21-1) of the end water control pipe nipple (17) is increased and provided with a transition section so as to adapt to the connection with the oil pipe head (14).
7. The device according to claim 6, wherein the fluid sensitive valve (22) is of a replaceable structure, and the tracer reservoir (19) contains a tracer, the release opening of which communicates with the restriction flow passage of the fluid sensitive valve (22).
8. The device according to claim 1, characterized in that the sensor unit (4) comprises a sensor joint (25), a sensor base (28) and a sensor spindle (29), the sensor unit (4) being provided with sensor spindles (29) extending to different depths inside the sand-filled zone for acquiring three-dimensional pressure field data; The sensor mandrel (29) can radially adjust the depth of the sensor mandrel extending into the sand filling area on the premise of keeping sealing, and the tail end of the sensor mandrel is coated with a microporous filter screen to prevent sand from blocking a sensing channel; The sensor unit (4) adopts a double sealing structure, wherein a sealing ring (20-4) is arranged at the joint of the locking nut (26) and the sensor base (28) to form primary sealing, and a sealing ring (20-5) is arranged between the sensor joint (25) and a sensor mandrel (29) penetrating through the sensor joint to form secondary sealing.
9. The device according to claim 8, wherein the sensor units (4) are symmetrically arranged in the circumferential direction of the device and are at least one-to-one corresponding to each analog unit in the axial direction to construct a monitoring network covering the axial direction, the radial direction and the circumferential direction, and the arrangement manner comprises: the wall pressure monitoring points are that the tail ends of the sensor mandrels (29) respectively extend to the wall surfaces of the outer screen pipe (7) and the inner screen pipe (9); the radial pressure gradient monitoring group consists of a plurality of sensor units (4), the lengths of the corresponding sensor mandrels (29) are distributed in a step shape, and the tail ends of the sensor mandrels are respectively positioned at different depths of the radial section of the sand filling area.
10. The device according to claim 1, further comprising a data storage processing system to which pressure signals collected by each sensor spindle (29) and flow and water content data collected by the flowmeter are synchronously transmitted in real time.

Description

Three-dimensional heterogeneous stratum water control oil extraction multi-parameter synchronous simulation experiment device Technical Field The invention relates to the technical field of oil and gas field development in the petroleum industry, in particular to a three-dimensional heterogeneous stratum water control oil extraction multi-parameter synchronous simulation experiment device. The device can finely simulate a three-dimensional heterogeneous stratum, integrates a modularized multi-tool testing system, and synchronously monitors multi-parameter changes such as pressure, flow, water content and the like in real time. Background In the middle and later stages of oil exploitation, as the oil reservoir is continuously developed, the stratum energy is attenuated, and the oil-water relationship is increasingly complex. The "channeling" of formation water along the high permeability strips, the "plunging" and "coning" of side and bottom waters have become prominent problems restricting development benefits, directly leading to rapid rise of the water yield of the production well, severely restricting the recovery of crude oil and increasing the recovery cost. To address this challenge, water-controlled oil recovery techniques ranging from chemical water shutoff to intelligent completions (e.g., ICD/AICD screens) have become a key research direction. However, the effectiveness of these techniques is highly dependent on the precise knowledge of formation heterogeneity and fluid flow laws. The on-site test has the risks of high cost, long period, irreversible reservoir injury and the like, so that the physical simulation in a laboratory becomes an indispensable link for optimizing the water control scheme. The conventional simulation device in the physical experiment field has obvious defects in structural design, function realization and data monitoring, namely, firstly, the conventional device is single in stratum characterization capability, most of the conventional device is a homogeneous sand filling or simple splicing model, radial and axial permeability rhythm changes are difficult to simulate, radial vector flow of well fluid cannot be depicted in a punctiform monitoring mode, the conventional physical partition plate can realize a sectionalized function, but completely blocks exchange channels of interlayer fluid, complex physical characteristics of 'sand isolation and fluid channeling' in a heterogeneous oil reservoir cannot be reduced, so that research on the interlayer channeling law is difficult to develop, secondly, tool evaluation is limited, the conventional production string is not integrated with a special water control component, only single tool isolation test can be performed, and the conventional device is mostly performed in a clear water pipeline, influences of stratum sand, fluid viscosity fluctuation and heterogeneous inflow on tool sensitivity are ignored, so that test results and underground actual working conditions are disjointed, thirdly, the conventional monitoring means only can acquire inlet-outlet pressure differences, cannot sense pressure gradient evolution inside the well, inner layer pressure blind areas are formed, and decision-making and water channeling law research is difficult to develop, and water channeling law optimizing strategies cannot be provided according to comprehensive water channeling control strategies. Aiming at the technical bottleneck, the invention provides a three-dimensional heterogeneous stratum water control oil extraction multi-parameter synchronous simulation experiment device. Disclosure of Invention The invention aims to provide a three-dimensional heterogeneous stratum water control oil extraction multi-parameter synchronous simulation experiment device, which is designed by three cores of nested axial balanced liquid distribution, stepped probe three-dimensional monitoring and tracing combined water control valve integrated coupling, a high-fidelity three-dimensional dynamic pressure field is constructed for the first time in a laboratory scale, high-fidelity reconstruction of the heterogeneous characteristics of the stratum is realized, and a modular water control nipple and tracer tracing technology is matched, so that crossing from static test to underground full-working-condition simulation is realized, a near-real experiment boundary is provided for evaluating an intelligent water control tool, and key technical support is provided for optimizing a water control oil extraction strategy. In order to achieve the above purpose, the invention adopts the following technical scheme: A three-dimensional heterogeneous stratum water control oil extraction multi-parameter synchronous simulation experiment device comprises a device main body (1), a plug (2), a production pipe column (3) and a sensor unit (4). The device comprises a device main body (1), a production pipe column (3), a sensor unit (4) and a casing pipe (6) and an outer screen