A fracture prediction method based on lithofacies configuration
A fracture prediction and configuration technology, applied in the field of reservoir fractures, can solve problems such as inability to effectively guide oil and gas exploration and development, inability to accurately predict the vertical and horizontal distribution of fractures, and achieve the effect of improving reliability and improving success rate.
Active Publication Date: 2021-08-31
CHINA PETROLEUM & CHEM CORP +1
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[0005] The purpose of the present invention is to overcome the problems existing in the prior art that only structural factors are considered in the study of the degree of fracture development, a quantitative prediction model for fractures based on geological analysis is not established, the vertical and horizontal distribution of fractures cannot be accurately predicted, and the exploration and development of oil and gas cannot be effectively guided. Insufficient, provide a fracture prediction method based on lithofacies configuration
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[0027] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.
[0028] In this embodiment, the fifth member of the Xuzhou Depression is taken as an example, as figure 1 As shown, a fracture prediction method based on lithofacies configuration includes the following steps:
[0029] Step 1: Prediction of relevant factors affecting fracture development, among which relevant factors include lithofacies configuration, organic carbon content of source rocks, curvature, distance from faults and rock fabric of all single wells in the Western Sichuan Depression.
[0030] Lithofacies configuration refers to the vertical combination pattern, superposition ...
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The invention discloses a fracture prediction method based on lithofacies configuration, comprising the following steps: predicting related factors affecting fracture development, wherein the related factors include lithofacies configuration, source rock organic carbon content, curvature, distance from fault distance and rock fabric; according to the statistical data of imaging logging fracture density and the statistical value of related factors, the correlation analysis between the related factors and the degree of fracture development is carried out to clarify the main geological factors affecting the development of fractures; according to the obtained Geological main control factors, establish a multi-parameter fracture density calculation model based on lithofacies configuration, and predict fractures. On the premise that the degree of fracture development in tight sandstone reservoirs is controlled by structural and non-structural factors, the present invention takes the prediction of related factors affecting fracture development as the main line, and takes the correlation between various related factors and fracture development as the key to obtain Geological main controlling factors and a multi-parameter fracture density calculation model are established to realize fracture prediction of tight sandstone reservoirs.
Description
technical field [0001] The invention relates to the technical field of reservoir fractures, in particular to a fracture prediction method based on lithofacies configuration. Background technique [0002] Fractures are natural macroscopic planar discontinuous structures formed by structural deformation or physical diagenesis in rocks (Nelson, 1985). Fractures belong to the same fault structure as faults. Because of their relatively small scale and difficult identification and prediction, they have always been a worldwide sex research problems. Due to sedimentation, diagenesis, and tectonic processes, low-permeability reservoirs are strongly heterogeneous and anisotropic. Fractures in low-permeability reservoirs affected by early sedimentary diagenesis superimposed by later tectonic processes have more complex development characteristics. [0003] Since the fractures developed in the reservoir can not only serve as storage spaces, but also connect scattered and isolated pore...
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IPC IPC(8): G01V9/00
CPCG01V9/00
Inventor 叶素娟田军张世华张庄李强杨映涛朱丽阎丽妮张玲何建磊颜学梅何秀彬
Owner CHINA PETROLEUM & CHEM CORP