Carbonate rock fault solution depicting method and apparatus

Abstract

The present invention discloses a carbonate rock fault solution depicting method and apparatus. The method comprises: establishing a formation model of a carbonate rock fault solution; dividing the formation model into a plurality of grids; for each grid, obtaining an attribute vale for reflecting each preset evaluation parameter and comparing the attribute value with a corresponding preset threshold value; assigning a value to an evaluation value of each evaluation parameter of each grid according to a comparison result; taking the sum of evaluation values of evaluation parameters of each grid as a comprehensive evaluation value of the corresponding grid; and integrating the comprehensive evaluation values of the plurality of grids to obtain a comprehensive evaluation body of the entire formation model of the carbonate rock fault solution. According to the method provided by the present invention, by setting the corresponding threshold value, the attribute values of different dimensions can be converted into the values of the same dimension, then the values can be integrated to a comprehensive evaluation body to intuitively reflect the development state and scale of the carbonaterock fault solution, and the method has practical guidance for the establishment of the geological model of the carbonate rock fault solution and for the efficient development of carbonate oil and gasreservoirs.

Description

technical field [0001] The invention relates to the field of geophysics for carbonate oil reservoir development, in particular to a method and device for describing carbonate fault-karst bodies. Background technique [0002] Carbonate fault-karst body refers to that after the carbonate rock formation is squeezed by multi-stage structures, a certain scale of broken zones develops with a deep fault zone as the core, and after multi-stage karst water seeps down along the fault or local hydrothermal fluid The upwelling caused the fractures and cracks in the fracture zone to be transformed by dissolution to form columnar dissolution pores and cave reservoirs. Under the vertical sealing of the overlying marl, mudstone and other caprocks and the lateral shielding of tight limestone, the fault-controlled A type of trap formed by irregular karst fracture-cave bodies. [0003] At present, the technical methods for carbonate rock fault-karst prediction mainly include: post-stack seism...

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Problems solved by technology

[0003] At present, the technical methods for carbonate rock fault-karst prediction mainly include: post-stack seismic attribute prediction, post-stack fracture prediction, pre-stack fracture prediction, etc. There are large differences in dimensions, so it is impossible to comprehensively study and evaluate the development state and scale of carbonate rock fault-karst bodies

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