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Fracture development area prediction method, and computer storage medium for predicting fracture development area
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A technology of computer storage and fracture development, which is applied to the computer storage medium for predicting fracture development areas and the prediction field of fracture development areas, and can solve the problem of low accuracy of fracture scale prediction
Active Publication Date: 2021-04-30
CHINA PETROLEUM & CHEM CORP +1
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[0006] The purpose of the present invention is to provide a method for predicting the fracture development area to solve the problem that the existing methods have low prediction accuracy of the fracture scale
[0007] The second object of the present invention is to provide a computer storage medium for predicting the fracture development area, so as to solve the problem that the prediction accuracy of the fracture scale is not high in existing methods
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Embodiment 1
[0043] The prediction method of the fracture development area in this embodiment adopts the following steps:
[0044] 1) According to the coring data and logging data of horizontal wells, identify the fractures encountered in horizontal wells, and through the analysis of acoustic wave curves and resistivity curves, clarify the electrical characteristics of fractures and the scale of electrical identification fractures, specifically including the following:
[0045] 1.1 According to the number of fractures identified by well logging and the results of core analysis, determine the depth position of the fracture at the well point;
[0046] 1.2 According to the fracture development density of the horizontal well statistics, combined with the information of the acoustic wave curve and the resistivity curve of the fracture position, the intersection analysis method is used to determine the electrical characteristic data corresponding to different fracture development densities (that ...
Embodiment 2
[0061] The prediction method of the fracture development area of this embodiment is basically the same as the method of embodiment 1, the only difference is:
[0062] In step 1), when determining the sensitive parameters, according to the characteristics of the region, the acoustic wave data and the resistivity data are used as the electrical characteristic data. Specifically, the acoustic wave curve value is greater than 240, and the resistivity value is less than 30.
[0063] The dip attribute and curvature attribute are seismic feature data.
[0064] According to the sensitive parameters selected above, the fracture scale is determined accordingly.
Embodiment 3
[0066] The prediction method of the fracture development area of this embodiment is basically the same as the method of embodiment 1, the only difference is:
[0067] In step 1), when determining the sensitive parameters of electrical characteristics, according to the characteristics of the region, the acoustic wave data and resistivity data are used as the electrical characteristic data, specifically showing that the acoustic wave curve value is greater than 240 and the resistivity value is less than 30.
[0068] The coherence attribute and dip attribute are seismic characteristic data.
[0069] According to the sensitive parameters selected above, the fracture scale is determined accordingly.
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Abstract
The invention relates to a fracture development area prediction method, and a computer storage medium for predicting a fracture development area. The prediction method comprises the following steps: 1) defining electrical characteristic data, identifying a crack scale by using the electrical characteristic data, defining seismic attribute characteristic data, and identifying the crack scale by using the seismic attribute characteristic data; 2) establishing a crack indication fitting curve according to the electrical characteristic data, the electrical identification crack scale, the seismic attribute characteristic data and the seismic identification crack scale; 3) establishing a well controlinterval velocity field, and determining a time domain sparse pulse wave impedance data volume; 4) determining a depth domain sparse pulse wave impedance data volume; and 5) according to the time domain sparse pulse wave impedance data volume and the depth domain sparse pulse wave impedance data volume, carrying out inversion prediction on the fracture development area. The method can effectively predict the crack development area and the longitudinal and transverse development scale of the crack, and lays a foundation for effective development of the tight sandstone reservoir.
Description
technical field [0001] The invention belongs to the field of fracture prediction, and in particular relates to a method for predicting a fracture development area and a computer storage medium for predicting a fracture development area. Background technique [0002] With the increasing difficulty of oilfield exploration and development, the effective development of tight sandstone reservoirs has been paid more and more attention. Judging from the current exploration and development results, fractures are the main factor controlling the seepage of low-permeability reservoirs. Effective identification is crucial to the exploration and development of low-permeability reservoirs. Fractures are an important channel for underground oil and gas accumulation and migration. Fracture prediction refers to predicting the development intensity of fractures or parameters related to fracture analysis. In most cases, the fractures are mainly structural fractures, that is, fractures attribu...
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