Reverse-flushing strike-slip fracture fold grading and partitioning analysis and three-dimensional characterization method

Abstract

The invention discloses a backwash strike-slip fracture wrinkle grading and partitioning analysis and three-dimensional characterization method. The method comprises the following steps: firstly, carrying out fractured stratum partitioning division and comparison by adopting a four-step method and depending on sedimentary cycle and a key marker bed; a differential geology-logging-earthquake 2D / 3D window fusion technology is adopted to analyze a master control second-level fault, third-level faults, fourth-level faults and fifth-level faults with obvious earthquake and logging characteristics, and third-level faults and fourth-level faults with only obvious earthquake characteristics; and carrying out three-dimensional modeling and panoramic representation on the multi-scale and multi-type fracture wrinkles: carrying out stepped grid modeling on the multi-scale and multi-type fracture wrinkles by adopting a four-step method in an angular point grid system according to a hierarchical classification analysis result, and completing multi-view panoramic visualization representation on the multi-scale and multi-type fracture wrinkles. According to the method, accurate identification, reasonable combination, reliable inspection, three-dimensional modeling and panoramic characterization of all levels and various types of fault wrinkles in the backwash strike-slip fracture wrinkle system are realized.

Description

technical field [0001] The invention relates to the technical field of structural geology and oil and gas exploration and development, in particular to a method for grading and zoning analysis and three-dimensional characterization of thrust strike-slip fault folds. Background technique [0002] Thrust strike-slip fault folds are widely distributed in central and western China, such as the Kunbei fault terrace and Altun Mountain fault zone in the Qaidam Basin, the northwestern margin fault terrace and Tianshan fault zone in the Junggar Basin, and the Liupanshui fault in the Ordos Basin. belt, the Longmenshan fault zone in the Sichuan Basin, etc. Thrust strike-slip fault folds not only store fluid minerals such as oil and natural gas, but also contain coal, iron, copper and other solid minerals, which are the main target areas for the exploration and development of various types of minerals. , characterization and modeling, not only have important academic research value, bu...

AI Technical Summary

Problems solved by technology

[0005] The commonly used fault combination method is mainly completed based on the structural style of the fault, which has great experience and uncertainty, and it is difficult to complete the thrust strike-slip fault system with different fault properties, geometric shapes and occurrence scales. scientific and reasonable combination of

[0006] Thrust strike-slip fault folds are widely distributed in the central and western regions of China. Using the theory of fault-related folds, researchers have basically clarified the structural deformation characteristics, deformation mechanism, formation mechanism, and kinematic and dynamic processes of such faults. The strata and faults of this kind of fault-fold system are broken, the properties of the main fault and its induced faults are different, the geometric shape and occurrence scale are also quite different, the logging and seismic response are messy, and identification, combination, characterization and modeling are difficult. There are accurate identification, reasonable combination, reliable inspection, three-dimensional modeling and panoramic characterization technologies for this kind of fault folds, but it is impossible to accurately identify all levels and types of fault folds in the thrust strike-slip fault fold system

Images