Shale brittleness index determination method, device and equipment
A technology of brittleness index and determination method, applied in the field of geological exploration, can solve the problem that the shale brittleness index cannot be determined comprehensively and accurately, and achieve the effect of accurate brittleness degree
Inactive Publication Date: 2021-10-08
CHINA UNIV OF PETROLEUM (BEIJING)
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[0005] The embodiment of the present application provides a shale brittleness index determination method, device and equipment to solve the problem that the shale brittleness index cannot be fully and accurately determined in the prior art
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[0034] The principle and spirit of the present application will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are given only to enable those skilled in the art to better understand and implement the present application, rather than to limit the scope of the present application in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.
[0035] Those skilled in the art know that the embodiments of the present application may be realized as a system, device, method or computer program product. Therefore, the disclosure of the present application can be specifically implemented in the form of complete hardware, complete software (including firmware, resident software, microcode, etc.), or a combination of hardware and software.
[0036] Although the processes described below include mul...
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The present application provides a shale brittleness index determination method, device and equipment, wherein, the method includes: obtaining the mineral brittleness index, the first elastic brittleness index and the confining pressure of multiple shale samples in the target well; The mineral brittleness index, the first elastic brittleness index and the confining pressure of the target shale sample in the rock sample are calculated as the second elastic brittleness index of the target shale sample under zero confining pressure; according to the second elastic brittleness index and the confining pressure , determining the target confining pressure correction trend of the target shale sample; performing confining pressure correction on the second elastic brittleness index according to the target confining pressure correction trend to obtain the target brittleness index of the target shale sample. In the embodiment of this application, the weakening effect of confining pressure on shale brittleness can be considered in the second elastic brittleness index, so that the above target brittleness index can truly, objectively and accurately characterize the actual confining pressure of the target shale sample in the target well Degree of brittleness under in situ conditions.
Description
technical field [0001] The present application relates to the technical field of geological exploration, in particular to a method, device and equipment for determining the brittleness index of shale. Background technique [0002] Shale reservoirs have extremely low porosity and permeability, so often require stimulation by fracturing. The "brittleness index" can characterize the difficulty of fracture formation in rocks during fracturing, and can also reflect the complexity of fractures formed after reservoir fracturing. The brittleness index is an important parameter to describe the fracturing of shale reservoirs and The necessary evaluation indicators for selecting high-quality shale. As the shale burial depth increases, the confining pressure increases, and the rock tends to change from brittle to plastic with the increase of confining pressure. Therefore, the brittleness of shale will be affected by the shale confining pressure. [0003] In the prior art, the brittlen...
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IPC IPC(8): E21B49/00
CPCE21B49/00
Inventor 刘立峰关濛高天宇
Owner CHINA UNIV OF PETROLEUM (BEIJING)