Measuring device and method for seepage force and effective stress influence of seepage force on stratum
A technology of effective stress and measurement devices, which is applied in the directions of measurement devices, relative volume flow measurement, liquid/fluid solid measurement, etc., can solve problems that cannot truly reflect the effective stress change of the fracture wall surface, seepage force research, etc.
Active Publication Date: 2019-01-18
XI'AN PETROLEUM UNIVERSITY
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Problems solved by technology
Since the seepage force measurement method in the prior art does not take hard fractured formation into consideration, and the hydraulic fracturing test does not study the seepage force, it cannot truly reflect the effective stress change near the fracture wall during hydraulic fracturing
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[0042] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0043] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0044] The invention relates to a measuring device for seepage force and its influence on formation effective stress. The measuring device includes:
[0045] The lower bearing platform 1 has a pressure testing device 15 fixed on the upper part of the lower bearing platform 1, a water storage chamber 16, and the water storage chamber 16 is equipped with a seepage water discharge pipe 2, and the upper part of the lower bearing platform 1 is equipped with a...
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The invention relates to the technical field of oil and gas field development, in particular to a measuring device and method for the seepage force and the effective stress influence of the seepage force on a stratum. According to the measuring device, a pressure testing device is fixed to the upper portion of a lower bearing platform, a seeping water drain pipe is installed in a water storage chamber, and a confining pressure loading chamber is installed on the upper portion of the lower bearing platform; a sample is placed on the lower bearing platform, ten measuring points are distributed on the outer wall of the sample in an equally spaced mode, an upper permeable pressure bearing steel sheet and a lower permeable pressure bearing steel sheet are placed on the upper end face and the lower end face of the sample respectively, and the sample is placed in a transparent rubber sleeve; and an axial pressure loading device is arranged on the upper surface of the upper permeable pressurebearing steel sheet and connected with an axial pressure servo motor, the upper permeable pressure bearing steel sheet is connected with a vacuum pump and a hole pressure loading system through steelpipe lines, the confining pressure loading chamber is connected with a confining pressure loading system through a steel pipe line, and a transparent observation window is arranged on one side of theouter wall of the confining pressure loading chamber. The measuring device can improve the measuring effectiveness and accuracy to enable a testing and calculation result to be more precise.
Description
technical field [0001] The invention relates to the technical field of oil and gas field development, in particular to a measuring device and method for seepage force and its influence on formation effective stress. Background technique [0002] Hydraulic fracturing technology is an important means of oil and gas recovery in unconventional oil and gas reservoirs. Its core idea is to inject a large amount of high-pressure fluid into the formation fractures to rapidly increase the pressure in the fractures, causing the fractures to rupture and extend along the tip. However, at the same time, the high-pressure fluid will also produce fluid loss along the fracture wall. According to the principle of action force and reaction force, this part of the fluid lost by fluid will be generated near the fracture wall under a high pressure gradient, which changes with the distance from the fracture surface The additional force of the fractured formation changes the original effective str...
Claims
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Patent Timeline
Login to View More IPC IPC(8): G01N33/24G01N1/08G01L5/00G01B21/32
CPCG01B21/32G01L5/00G01N1/08G01N33/24G01F9/003G01N3/00G01N3/567G01N11/00E21B49/088G01F9/026G01N15/0826
Inventor 周德胜郑鹏李欣儒刘娅菲马先林李萌杨静雯
Owner XI'AN PETROLEUM UNIVERSITY