CN-122016544-A - Horizontal shaft fracturing clustering erosion testing device, system and method

CN122016544ACN 122016544 ACN122016544 ACN 122016544ACN-122016544-A

Abstract

The application relates to the technical field of oil gas development equipment, and discloses a horizontal shaft fracturing clustering erosion testing device, a testing system and a testing method. The testing device comprises an erosion tool module, a stratum back pressure simulation module and a controllable flow distribution module, wherein the erosion tool module is provided with a liquid outlet, the erosion tool module is used for installing a fracturing shaft to be tested, one end of the fracturing shaft is used for being externally connected with a fracturing device for providing fracturing fluid, the other end of the fracturing shaft penetrates through the erosion tool module to be arranged, a ring cavity is formed between the fracturing shaft and the erosion tool module, a plurality of perforation holes facing the liquid outlet are formed in the wall of the fracturing shaft, the stratum back pressure simulation module is used for discharging liquid from the control liquid outlet according to a preset constant flow, and the controllable flow distribution module is used for being connected with the other end of the fracturing shaft and is used for adjusting the bypass flow of the fracturing shaft. The testing device disclosed by the application has the advantages of simple structure, guaranteed precision, small occupied area, high flexibility and low cost.

Inventors

HOU BING
FU HAIFENG
XIE JINYANG
LI RUNSEN
JIANG HAILONG
DAI YIFAN
CUI ZHUANG

Assignees

中国石油大学(北京)

Dates

Publication Date: 20260512
Application Date: 20260415

Claims (10)

1. A horizontal wellbore fracturing cluster erosion testing device, comprising: The device comprises an erosion tool module (100) and a test device, wherein the erosion tool module (100) is provided with a liquid outlet (101), the erosion tool module (100) is used for installing a fracturing shaft (400) to be tested, one end of the fracturing shaft (400) is used for being externally connected with a fracturing device (500) for providing fracturing fluid, the other end of the fracturing shaft passes through the erosion tool module (100) to be arranged, a ring cavity (102) is formed between the fracturing shaft (400) and the erosion tool module (100), and a plurality of perforation holes (410) facing the liquid outlet (101) are formed in the wall of the fracturing shaft (400); The stratum back pressure simulation module (200) is connected with the liquid outlet (101) and is used for controlling the liquid outlet (101) to discharge liquid according to a preset constant flow; and the controllable flow distribution module (300) is used for being connected with the other end of the fracturing well bore (400) and adjusting the bypass flow of the fracturing well bore (400).
2. The horizontal well fracturing clustering erosion testing device according to claim 1, wherein the erosion tool module (100) is provided with a buffer tank (130) at the liquid outlet (101), and the buffer tank (130) is connected with the erosion tool module (100); The stratum back pressure simulation module (200) is arranged at the outlet of the buffer tank (130).
3. The horizontal wellbore fracturing and cluster erosion testing device of claim 1, wherein the formation back pressure simulation module (200) is a mechanical valve or a fixed choke, and/or the controllable flow distribution module (300) is an electric valve, a magnetic valve or an automatic choke.
4. A horizontal wellbore fracturing and clustering erosion testing device according to any one of claims 1-3, wherein the erosion tool module (100) comprises an erosion frame (110) and sealing flanges (120) arranged at two ends of the erosion frame (110); The fracturing wellbores (400) are arranged through the sealing flanges (120) at two ends of the erosion frame (110) and are in sealing fit with the corresponding sealing flanges (120).
5. An erosion testing system, characterized by comprising a control device, a fracturing device (500) and a horizontal wellbore fracturing cluster erosion testing device according to any of claims 1-4; The fracturing device (500) is connected with the fracturing shaft (400) through a pipeline, and the control device is in communication connection with the fracturing device (500) and the controllable flow distribution module (300) in the horizontal shaft fracturing cluster erosion testing device; Wherein the control device is configured to coordinate the operation of the fracturing device (500) and the controllable flow distribution module (300) according to the simulated perforation cluster position of the fracturing wellbore (400).
6. The erosion testing system of claim 5, further comprising a flowback recovery device (600); The liquid outlet end of the stratum back pressure simulation module (200) is connected with the flowback recovery device (600) through an erosion pipeline (700), and the controllable flow distribution module (300) is connected with the flowback recovery device (600) through a bypass pipeline (800).
7. An erosion simulation test method applied to the erosion test system according to any one of claims 5 to 6, the erosion simulation test method comprising: Preparing the fracturing wellbore (400) to be tested and acquiring initial data of the perforations (410) on the fracturing wellbore (400); installing the fracturing wellbore (400) in the erosion testing system, setting testing parameters and starting testing; And stopping the current test after the test time reaches the preset duration, taking out the fracturing wellbore (400) and acquiring the erosion data of the perforation holes (410).
8. The erosion simulation test method according to claim 7, wherein the test parameters include three variable parameters, the three variable parameters being an erosion displacement Q1 of the formation back pressure simulation module (200), a sand concentration in the fracturing fluid, and a preset duration of the test, respectively; Wherein said installing said fracturing wellbore (400) in said erosion testing system, setting test parameters and initiating a test comprises: installing the fracturing well bore (400) into the erosion tool module (100), connecting the fracturing device (500) through a pipeline, and setting three variable parameters; closing the displacement of the controllable flow distribution module (300) or controlling the controllable flow distribution module (300) to be opened and keeping the displacement constant, carrying out experimental tests according to the set three variable parameters, and recording experimental data in real time.
9. The erosion simulation test method according to claim 8, further comprising: And designing 9 groups of test schemes according to a three-parameter three-level orthogonal mode, setting three different variable parameters for each group of test schemes, sequentially completing the test of the 9 groups of test schemes, determining the flow coefficient of the perforation (410) according to the experimental data and the washed data in each group of test schemes to obtain 9 groups of data points, and determining the washed coefficient through regression calculation according to the 9 groups of data points.
10. The erosion simulation test method of claim 7, wherein installing the fracturing wellbore (400) in the erosion test system, setting test parameters and initiating a test comprises: Installing the fracturing well bore (400) into the erosion tool module (100) and connecting the fracturing device (500) through a pipeline, setting the sand concentration in the fracturing fluid, the erosion displacement of the stratum back pressure simulation module (200) as Q1 and the test time, and simultaneously determining an nth group of different injection displacement Qn according to different perforation cluster positions n, wherein n is the cluster number from the toe end to the heel end, and the injection displacement qn=n Q1, and simultaneously determining that the displacement of the controllable flow distribution module (300) is Q2, and Q2=Qn-Q1; And starting the controllable flow distribution module (300) to perform a test according to the determined displacement Q2 of the controllable flow distribution module (300).

Description

Horizontal shaft fracturing clustering erosion testing device, system and method Technical Field The application belongs to the technical field of oil gas development equipment, and particularly relates to a horizontal shaft fracturing clustering erosion testing device, a testing system and a testing method. Background Horizontal well multi-cluster fracturing is a key technology for developing unconventional oil and gas resources, and the core challenge is to realize uniform liquid feeding and sand adding of each perforation cluster in a section so as to maximize the reservoir reconstruction volume. However, erosion of sand-carrying fluid to perforation holes in the fracturing process can change the size and friction of the perforation holes, so that flow distribution unbalance of the original design is caused, and fluid feeding is stopped too early by partial clusters, so that the fracturing effect is seriously affected. Therefore, the research on the perforation erosion rule, the propping agent diversion characteristic and the control method thereof has important significance for optimizing the fracturing design. Unconventional fracturing generally adopts a large-section multi-cluster fracturing mode, and the single section of a long horizontal section has a length of at least 50m, so that the split flow of fracturing fluid and propping agent among clusters is uneven, and the conditions of strong partial clusters and weak partial clusters are caused, so that the reliability of experimental data is low. And because of the influence of the length, the method occupies a larger field, has high cost, and can not flexibly develop any single-cluster porous hole large-displacement erosion experiment at the field level. Disclosure of Invention The application aims to provide a horizontal shaft fracturing clustering erosion testing device, a testing system and a testing method, which are used for solving the problems that the existing large-section multi-cluster fracturing mode has unreliable experimental data, large occupied area and high cost, and any single-cluster porous hole large-displacement erosion experiment at the site level can not be flexibly developed. In order to achieve the above object, a first aspect of the present application provides a horizontal wellbore fracturing cluster erosion testing device, including: The device comprises an erosion tool module, a plurality of hydraulic control modules, a hydraulic control module and a hydraulic control module, wherein the erosion tool module is provided with a liquid outlet and is used for installing a fracturing shaft to be tested, one end of the fracturing shaft is used for being externally connected with a fracturing device for providing fracturing fluid, the other end of the fracturing shaft penetrates through the erosion tool module to be arranged, a ring cavity is formed between the fracturing shaft and the erosion tool module, and a plurality of perforation holes facing the liquid outlet are formed in the wall of the fracturing shaft; The stratum back pressure simulation module is connected with the liquid outlet and is used for controlling the liquid outlet to discharge liquid according to a preset constant flow; And the controllable flow distribution module is used for being connected with the other end of the fracturing well bore and adjusting the bypass flow of the fracturing well bore. As a further improvement of the above technical scheme: in some embodiments, the erosion tool module is provided with a buffer tank at the liquid outlet, and the buffer tank is connected with the erosion tool module; The stratum back pressure simulation module is arranged at the outlet of the buffer tank. In some embodiments, the formation back pressure simulation module is a mechanical valve or a fixed oil nozzle, and/or the controllable flow distribution module is an electric valve, a magnetic valve or an automatic oil nozzle. In some embodiments, the erosion tool module comprises an erosion frame and sealing flanges arranged at two ends of the erosion frame; The fracturing well bore is used for penetrating through the sealing flanges at the two ends of the erosion frame and is in sealing fit with the corresponding sealing flanges. In order to achieve the above object, a second aspect of the present application provides an erosion testing system, including a control device, a fracturing device, and a horizontal wellbore fracturing cluster erosion testing device provided according to the above first aspect; The fracturing device is connected with the fracturing shaft through a pipeline, and the control device is in communication connection with the fracturing device and the controllable flow distribution module in the horizontal shaft fracturing clustering erosion testing device; The control device is configured to coordinate and control the operation of the fracturing device and the controllable flow distribution module according to the position of the perfora