天然气与石油2024，Vol.42Issue(4)：11-21,11.DOI:10.3969/j.issn.1006-5539.2024.04.002
基于裂缝形成机理分析的潜山裂缝地震预测技术
Seismic prediction technology for buried hill fracture reservoirs based on fracture formation mechanism analysis
摘要
Abstract
Due to factors such as large burial depth,high difficulty in seismic imaging,and low data resolution,it is extremely challenging to predict fine,high-angle,and small-scale fractures using wide-azimuth seismic data in the deep metamorphic rock buried hill gas reservoirs of the Archean period.The multiple stages of fracture development and complex and variable strike and dip angles further exacerbate the difficulty of using seismic amplitude to invert fracture information.In response to the above difficulties,this paper starts with an analysis of the formation mechanism of fractures in metamorphic rock matrix,evaluates the feasibility of using seismic data to predict the formation ability of fractures in metamorphic rock,and based on this,utilizes azimuthal anisotropy information for fracture density prediction.Firstly,a geophysical applicable evaluation model for the formation ability of fractures in buried metamorphic rocks is proposed.The model innovatively combines the critical strain energy release rate and brittleness index to evaluate the formation ability of fractures in buried hill of metamorphic rocks.Through petrographic definition,seismic inversion,and statistical classification,quantitative seismic interpretation of fracture formation capability is achieved.Concurrently the HTI(Horizontal Transverse Isotropy)rock physics simulation technology based on the Chapman model is used to develop a fitting relationship between fracture density and azimuthal anisotropy strength of different fracture formation capability of rock facies.Based on this,accurate prediction of fracture density by rock facies is carried out based on the interpretation of fracture formation capability.The above technology has been successfully applied to the structure B of buried hill in Bohai.The research results can provide reference for seismic prediction of fractures in similar metamorphic rock buried hill.关键词
变质岩潜山/裂缝密度预测/裂缝形成机理/统计分类/Chapman模型/HTIKey words
Metamorphic rock buried hill/Fracture density prediction/Formation mechanism of fractures/Statistical classification/Chapman model/HTI引用本文复制引用
明君,黄江波,王建立,王林..基于裂缝形成机理分析的潜山裂缝地震预测技术[J].天然气与石油,2024,42(4):11-21,11.基金项目
中海石油(中国)有限公司重大科技项目"渤海复杂潜山油气藏精细油藏描述及高效开发技术研究"(CNOOCKJ135ZDXM36TJ03TJGD2020-01) （中国）
