Large-size sandstone target perforation flow efficiency testing device
An efficiency test, large-scale technology, applied in the direction of measuring device, permeability/surface area analysis, suspension and porous material analysis, etc., can solve the problems of easy damage of rubber sleeve, test failure, waste of resources, etc., and achieve a simple mechanical structure The effect of the design
Active Publication Date: 2020-04-03
CNOOC TIANJIN BRANCH
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Problems solved by technology
However, as the drilling depth increases, the temperature and pressure also increase continuously. The downhole pressure temperature may be as high as 100MPa, 200°C. At the same time, the difference between the wellbore pressure, pore pressure and the overlying formation pressure is also large. Under such high temperature and high pressure conditions In this case, the rubber sleeve that acts as a pressure divider is easily damaged, leading to test failure and waste of resources
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[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0021] like figure 1 As shown, a large-scale sandstone target perforation flow efficiency test device includes a temperature-resistant and pressure-resistant container, an intermediate partition device A, a core mechanism, and a core support seat B; the partition device A, the core mechanism, and the core support seat B constitutes a pressure separation structure;
[0022] The intermediate separation device A is located in the upper half of the temperature-resistant and pressure-resistant container, and a limiting cylinder 10 is provided between the intermediate separating device A and the top of the temperature-resistant and pressure-resistant container; the limiting cylinder 10 has an upper cavity a;
[0023] The rock core support seat B is located in the lower half of the temperature-resistant and pressure-resistant container, and a lower cavity c...
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The invention provides a large-size sandstone target perforation flow efficiency testing device. The device comprises a temperature-resistant and pressure-resistant container, a middle separation device, a rock core mechanism and a rock core supporting seat, the middle separation device is located at the upper half part in the temperature-resistant and pressure-resistant container, and a limitingcylinder is arranged between the middle separation device and the top of the temperature-resistant and pressure-resistant container; an upper cavity is formed in the limiting cylinder; the rock core supporting seat is located at the lower half part in the temperature-resistant and pressure-resistant container, and a lower cavity is reserved between the rock core supporting seat and the bottom of the temperature-resistant and pressure-resistant container; a middle cavity is formed between the middle separation device and the rock core supporting base, and the rock core mechanism is installed between the middle separation device and the rock core supporting base. Through simple mechanical structure design, the temperature-resistant and pressure-resistant conditions of the underground rock core are simulated, the pressure of the three cavities can be independently adjusted, high temperature and large pressure difference can be borne, and the defects that in the prior art, pressure separation is difficult, the allowable pressure difference is small, and temperature resistance is low are effectively overcome.
Description
technical field [0001] The invention belongs to the technical field of oil exploitation perforation testing, and in particular relates to a large-size sandstone target perforation flow efficiency testing device. Background technique [0002] Perforation is an important part of the oil production process, and it plays a key role in the "door step". During the perforation operation, the high-speed metal jet penetrates the oil and gas layer, and at the same time forms a compaction zone near the perforation, resulting in the formation of oil and gas layers. Porosity and permeability damage seriously affect the productivity of oil and gas wells. Therefore, it is necessary to establish a set of perforation flow test equipment that simulates downhole conditions. [0003] At present, the test of perforation effect is mostly carried out by ground shooting experiment. The perforation effect is judged by the penetration depth and aperture of the cement target. A small number of devices...
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Login to View More IPC IPC(8): G01N15/08
CPCG01N15/082
Inventor 吴木旺梁豪姜洪丰王金山
Owner CNOOC TIANJIN BRANCH