Simulation fracture plugging test device and test method
A technology for simulating fractures and test equipment, which is applied in earthwork drilling, wellbore/well components, sealing/isolation, etc., and can solve the problem of unreasonable location and structure of leakage beds and fracture plates, and fractures that cannot truly simulate leakage formations and other problems, to achieve the effect of convenient operation, ingenious and reasonable structure, and prevention of serious leakage
A technology for simulating fractures and test equipment, which is applied in earthwork drilling, wellbore/well components, sealing/isolation, etc., and can solve the problem of unreasonable location and structure of leakage beds and fracture plates, and fractures that cannot truly simulate leakage formations and other problems, to achieve the effect of convenient operation, ingenious and reasonable structure, and prevention of serious leakage
CN101672172AInactive Publication Date: 2010-03-17SOUTHWEST PETROLEUM UNIV
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[0013] During the experiment, put the plugging liquid required for the test into the high-pressure container 1, rotate the upper cover 3 of the container clockwise, and seal it with the high-pressure container ○-shaped sealing ring 2 placed on the upper end of the high-pressure container 1, and install a needle on the top of the upper cover. Type stop valve 4 is connected with the quick joint of the high-pressure gas pipe of the nitrogen cylinder. According to the needs, select a constant pressure difference to simulate the field conditions or increase or decrease the pressure at a certain rate, so that the plugging liquid is injected into the channel flange 6 under pressure. Simulate the fracture test module 8 in the wellbore 7. The test module is positioned by the module positioning sleeve 9 and fixed by the module connection fastening screw 10. When the plugging fluid passes through the fracture and compresses the plugging fluid outlet control valve 11, it flows out along the...
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The invention relates to a simulation fracture plugging test device and a test method used in drilling operation in oil-gas fields, which can estimate fracture plugging materials with longer fracturedepth and a plugging drilling fluid or completion fluid system, and truly reflect the plugging effect of fracture leakage loss with depth. The test device consists of a fracture test module and a highpressure container. The technical scheme thereof is as follows: the upper end of the high pressure container is provided with an O-shaped seal ring of the high pressure container; the top part of anupper cover is provided with a needle check valve; the needle check valve is connected with the quick joint of the high pressure gas pipe of a nitrogen bottle; the high pressure container is connectedonto an upright post by a bottom cover and a bottom cover connecting flange; the fracture test module is located by a module locating sleeve, and is fixed by a module connecting fastening bolt; and aplugging fluid outlet pipeline is connected with a plugging fluid outlet connecting flange. The invention has the advantages of reasonable simulation fracture structure, stable and reliable high pressure sealing and working, convenient operation of test device, and the like, and can provide important test device and research method for customizing a production field plugging scheme.
Description
Technical field: [0001] The invention relates to a simulated fracture plugging test device and a test method for the study of fractured leakage and plugging in oil and gas field drilling operations, and is especially suitable for simulating underground fractures with deep depths for plugging material evaluation and plugging drilling fluid, completion Research on plugging effect, mechanism and formula of well fluid and other oil and gas well working fluids. Background technique: [0002] Lost circulation is a common and often encountered complex engineering situation in the process of oil and gas drilling. The complex downhole conditions caused by it and other various downhole vicious accidents induced by it are extremely harmful to drilling and completion projects. It has always been a domestic It is a matter of great concern to foreign petroleum engineering circles. However, due to its complex reasons and many restrictive factors, it has become a major technical problem th...
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Patent Timeline
17 Mar 2010
Publication
CN101672172A
- IPC
- E21B33/13
- Inventors
- 蒲晓林; 侯勤立