摘要
地层组成对断层结构具有重要的影响或制约作用,基于物理模拟实验研究了不同砂岩含量地层的断层结构特征.结果表明,纯砂岩即泥岩含量为0时,断层结构为二元型;泥岩含量为4%～16%时,断层发育一元型结构;泥岩含量为16%～20%时,断层发育二元型结构;泥岩含量为20%～35%时,断层发育二元或三元型结构,二元或三元型结构的界线并不很明显;泥岩含量为35%～50%时,断层又发育二元型结构;泥岩含量为50%～100%时,断层回归于一元型结构.泥岩含量与破碎带的宽度、诱导裂缝个数具有明显的正相关关系,基本上呈近似正态分布.
Stratigraphic composition has an important influence or restrict on fault structure. Fault structure characteristicswith different sandstone contents of strata have been researched based on physical simulation experiments. The experi-ments show that the fault is a binary type when the sandstone content is 100%;the fault develops into a unary type whilethe shale content is 4%-16% and a binary type while the shale content is 16%-20%;and it develops into binary or ternarytype with unclear boundaries while the shale content is 20%-35%;the fault is binary type again when the shale content is35%-50% and becomes unary type when shale content is 50%-100%. There is an apparent positive correlation among theshale content,the width of damage zone and the number of induced joints,which is an approximately normal distribution.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2015年第2期24-27,共4页
Petroleum Geology and Recovery Efficiency
基金
国家科技重大专项"渤海湾盆地精细勘探关键技术"(2011ZX05006-003)
关键词
物理模拟
地层组成
泥岩含量
破碎带宽度
诱导裂缝
断层结构
physical simulation
stratigraphic composition
shale content
width of damage zone
induced joints
fault structure
