A Fast Interpretation Method for Faults Based on Variable Interpretation Measuring Network Density

Abstract

The invention relates to a fault fast interpretation method based on variable interpretation net density. The method comprises the following steps of: 1) performing interpretative processing on seismic data to be interpreted; 2) extracting and interpreting a variance cube attribute slice near a target layer by utilizing a variance cube technology; 3) interpreting a fault on the extracted attributeslice, and determining the number and position of inflection points of the fault on a plane; 4) respectively extracting the head end point and the tail end point passing through a fault line on the plane and the seismic section passing through each inflection point of the fault in a direction perpendicular to the trend direction of the fault, and completing the interpretation of the fault on theseismic section to form a fault interpretation of the variable interpretation net density; 5) performing internal interpolation interpretation of the fault between the seismic sections to finish the interpretation work of the fault; and 6) repeating the steps 3) -5) until the interpretation of all fault in the work area is completed. The fault fast interpretation method based on variable interpretation net density, provided by the invention, not only has higher working efficiency and interpretation precision, but also can ensure the space closure of the fault.

Description

technical field [0001] The invention relates to a fast fault interpretation method, in particular to a fast fault interpretation method for complex fault block oil and gas fields based on variable interpretation measurement network density. Background technique [0002] Due to the multi-phase development of faults and complex fault systems in complex fault-block oil and gas fields, the accuracy of seismic structural interpretation, especially fault interpretation, is also improved with the demand for remaining oil distribution prediction and well location optimization after this type of oil field enters the middle and late stages of development. for stringent requirements. In recent years, with the advancement of 3D seismic data acquisition and processing technology, the full 3D interpretation technology with 3D spatial automatic interpretation as the core has developed rapidly. The full three-dimensional interpretation technology sets spatial seed points based on geologica...

AI Technical Summary

Problems solved by technology

However, for large-scale 3D data volumes, if horizon tracking, fault interpretation, and fault plane combination are carried out according to the 2D interpretation method, there will be problems such as horizons, unclosed faults, and unreasonable fault plane combinations, which seriously affect work efficiency.

Images