Fractured reservoir prediction and evaluation method
An evaluation method and technology for fractured reservoirs, applied in the field of geophysical exploration, can solve the problems of inaccurate prediction and evaluation of fractured reservoirs, and achieve the effects of improving fracture prediction accuracy, broad application prospects and simple principles
Active Publication Date: 2021-05-11
BC P INC CHINA NAT PETROLEUM CORP +1
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[0004] The main purpose of the present invention is to provide a method for predicting and evaluating fractured reservoirs to solve the problem of inaccurate prediction and evaluation of fractured reservoirs in the prior art
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[0029] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0030] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by those of ordinary skill in the art to which this application belongs.
[0031] In the present invention, unless stated otherwise, the used orientation words such as "upper, lower, top, bottom" are usually for the directions shown in the drawings, or for the parts themselves in the vertical, In terms of vertical or gravitational direction; similarly, for the convenience of understanding and description, "inner and outer" refer to the inner and outer relative to the outline of each component itself, but the above orientation words ...
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The invention provides a fractured reservoir prediction and evaluation method. The fractured reservoir prediction and evaluation method comprises the following steps: determining fracture development basic parameters of a fractured reservoir according to geological data; carrying out intersection analysis on logging characteristics of the fractured reservoir, and determining a geophysical identification basis of the fractured reservoir; carrying out single-well fractured reservoir interpretation, determining longitudinal development characteristics of the fractured reservoir, and determining a development law of the fractured reservoir; combining the logging characteristics of the fractured reservoir and DST testing, and carrying out effectiveness single well research of the fractured reservoir; determining a predicted offset distance and an azimuth angle of a pre-stack five-dimensional fracture by using the logging characteristics of the fractured reservoir, and calculating the development strength and the trend of the fractured reservoir; determining an effective fracture development zone in combination with a fracture effectiveness evaluation result; and completing reservoir comprehensive evaluation and well location suggestion in combination with a structural reservoir research result. According to the method, the problem of inaccurate prediction and evaluation of the fractured reservoir in the prior art is solved.
Description
technical field [0001] The invention relates to the technical field of geophysical exploration, in particular to a method for predicting and evaluating fractured reservoirs. Background technique [0002] Prediction and effectiveness evaluation of fractured reservoirs is one of the key problems in oil and gas exploration and development. At present, fracture prediction research is generally based on the theory of material mechanics, using geological, drilling and logging data to establish geological models, mechanical models and mathematical models, and using numerical simulation methods to simulate the stress field, so as to obtain the distribution of principal strain and principal stress , combined with seismic attributes and formation velocity changes to predict fracture distribution, trend and development degree, and delineate fracture development zones. Limited by the aspect ratio, signal-to-noise ratio and frequency characteristics of conventional seismic data, the pre...
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Login to View More IPC IPC(8): E21B47/00E21B47/002
CPCE21B47/00
Inventor 窦立荣魏小东王景春王仁冲
Owner BC P INC CHINA NAT PETROLEUM CORP