Logging GeoMechanics Identify Reservoir (LogGMIR) method

Abstract

The invention provides a Logging GeoMechanics Identify Reservoir (LogGMIR) method. Starting from the perspective of rock mechanics, the method researches the relation between crustal stress and reservoir validity, establishes a reservoir effectiveness evaluation standard and recognizes high-quality reservoirs, forms a set of method and technology applicable to high and steep structure crustal stress calculation and reservoir recognition, establishes a calculation method for the crustal stress of mountain front high and steep stratums and a mechanical standard for evaluating the reservoir effectiveness, provides a brand-new technological support for logging evaluation on the deep fractured sandstone reservoir effectiveness in a work area and provides a reliable geological mechanics basis for formation testing, acidification, crushing and other layer selection processes.

Description

technical field [0001] The invention belongs to the technical field of geological exploration, in particular to a method for identifying high-quality reservoirs by LogGMIR logging in-situ stress. Background technique [0002] At present, exploration wells and development wells in the high-steep structural belt of the Kuqa piedmont in the Tarim Basin generally have a well depth of more than 6,000 meters. The pore pressure coefficient of different geological layers is different, and the difference is very large. Due to the influence of paleo-tectonic stress, especially the Yanshan Movement and Himalayan Movement, the in-situ stress in the work area is relatively strong, and the dip angle of the formation is relatively large. Large, from a few degrees to tens of degrees. Due to the extrusion of strong horizontal stress and gravity compaction, the reservoir matrix exhibits low porosity and low permeability, and natural fractures are relatively developed. For most formations, t...

AI Technical Summary

Problems solved by technology

[0013] The object of the present invention is to provide a method for Logging GeoMechanics Identify Reservoir (LoggingGeoMechanicsIdentifyReservoir) logging in-situ stress to identify high-quality reservoirs, aiming to solve the problem of inaccurate calculation of in-situ stress and the effectiveness of low-porosity and low-permeability reservoirs in abnormally high-pressure formations with high and steep structures in the piedmont Evaluation is difficult, leading to conflicts between logging reservoir interpretation (evaluation) results and oil testing conclusions

Images