Method for detecting total organic carbon content and brittleness space distribution of shale reservoir

Abstract

The invention provides a method for detecting the total organic carbon content and brittleness space distribution of a shale reservoir and relates to the technical field of petroleum geological exploration. The method comprises the following steps of building a reservoir mineral rock physical model; determining range and brittleness extreme values of correlated elastic parameters or elastic parameter assemblies of the total organic carbon content and the brittleness of the shale reservoir; acquiring the correlated elastic parameters or the elastic parameter assemblies of the total organic carbon content and the brittleness of the shale reservoir; performing horizon interpretation on the correlated elastic parameters or the elastic parameter assemblies obtained by the AVA inversion of seismic data volume according to the range and brittleness extreme values of the correlated elastic parameters or the elastic parameter assemblies, determining a gas-containing shale reservoir area and a brittleness area, and acquiring top to bottom interface data of the gas-containing shale reservoir area and the brittleness area; determining the gas-containing shale reservoir thickness distribution and the brittleness area body thickness distribution of the shale reservoir according to the top to bottom interface data of the gas-containing shale reservoir area and the brittleness area. According to the method, the problem of lacking of a parameter reference for the total organic carbon content and brittleness space distribution in shale gas exploration can be solved.

Description

technical field [0001] The invention relates to the technical field of petroleum geological exploration, in particular to a detection method for total organic carbon content and brittle space distribution of shale reservoirs. Background technique [0002] In the field of oil exploitation, shale gas, as an unconventional natural gas resource, is being widely studied, and the total organic carbon content (TOC) and brittle space distribution in shale are the focus of current research at home and abroad. [0003] Due to the complex topography of shale reservoirs, harsh exploration conditions, and changeable formation conditions, shale gas exploration and development are very difficult. At present, research on shale gas mainly focuses on the accumulation model of shale gas and the geological characteristics of shale gas. However, there are few studies on the distribution of organic carbon and brittleness in shale reservoirs based on the petrophysical characteristics of shale gas...

AI Technical Summary

Problems solved by technology

[0006] Embodiments of the present invention provide a detection method for total organic carbon content and brittle spatial distribution of shale reservoirs, so as to solve the lack of parameter basis for total organic carbon content and brittle spatial distribution in shale gas exploration in the prior art. Issues Favorable for Shale Gas Exploration and Exploitation

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