利用地震方法识别简单斜坡断层位移褶皱及相关圈闭——以文安斜坡中南部为例  

Fault displacement folds in simple slope and its related traps: a case study on the south central Wen'an slope

作　　者：刘峻桥 吕延防[1] 张梦迪[1] 孙同文[1] 曹兰柱 王彪[3] 刘哲[1] 

机构地区：[1]东北石油大学地球科学学院,大庆163318 [2]中国石油华北油田公司,任丘062552 [3]大庆油田有限责任公司第八采油厂,大庆163000

出　　处：《地球物理学进展》2017年第3期1181-1189,共9页Progress in Geophysics

基　　金：国家重大科技专项(2016ZX05007003);国家自然科学基金项目(41372154;41602164);东北石油大学研究生创新科研项目(YJSCX2016-001NEPU);中国石油科技创新基金项目(2015D-5006-0103)联合资助

摘　　要：简单斜坡是具有构造平缓和低断裂密度特征的弱构造带,断层位移褶皱作为简单斜坡内一种常见的断层相关褶皱类型,能够形成重要的油气圈闭构造.为了准确识别断层位移褶皱及其相关油气圈闭,以三维地震为基础,结合不同生长阶段断层位移变化来阐明不同类型断层位移褶皱形成机制,应用断层分段性和断层平面分段生长阶段定量表征方法来识别断层位移褶皱的类型及发育部位.同时,以文安斜坡中南部为研究靶区,探讨位于文安油田内史各庄和议论堡地区主要含油区附近断层形成的断层位移褶皱类型,阐明其相关圈闭构造与油气分布关系.研究结果表明,王仙庄断层和SGZ1断层都处于"硬连接"生长阶段,能够形成"硬连接"断层位移褶皱,SGZ2和SGZ3断层处于相互作用的"软连接"阶段,形成"软连接"断层位移褶皱.断层位移褶皱相关圈闭发育部位与文安油田油气分布关系表明断层位移褶皱相关圈闭构造是文安油田主要的含油气圈闭类型,富集了文安油田大部分的油气储量.Simple slope is a weak structural belt which has characteristics of flat structure and low fault density, fault displacement fold is a common type of fault-related folds which can form important oil-gas traps. To identify fault displacement folds and its related traps accurately,the formation mechanism of different types of fault displacement folds have been illuminated on the basis of 3D seismic data and combining with displacement variation in the different growth stage,this study applied a method to identify the type and development position of fault-displacement fold by quantitative characterization of fault segmentation growth and fault segmentation growth stage discrimination criterion. Taking Wen‘an oil field as a study example,the type of fault-displacement folds in the area of Shigezhuang and Yilunpu of Wen＇an oil field have been discussed and illustrated the relationship between its related traps and oil-gas distribution. The research shows,Both Wangxianzhuang fault and SGZ1 fault which are in the stage of ＂hard-linkage＂can form＂hard-linkage＂fault displacement folds,SGZ2 fault and SGZ3 fault which are in the stage of ＂soft-linkage＂interacting with each other can form＂soft-linkage＂fault displacement fold. The relation between fault displacement folds and oil-gas distribution in Wen＇an oil field show that fault displacement fold related traps is the main type of petroliferous traps in Wen ＇an oil field which accumulated almost all the oil and gas reserves.

关 键 词：简单斜坡 断层位移褶皱 分段生长 圈闭 文安斜坡 

分 类 号：P631[天文地球—地质矿产勘探]