摘要
基于三维地震解释,对克拉苏构造带地下盐岩的空间展布形态进行分析,通过井震结合,建立盐内地震相模式,探讨研究区盐内变形特征和对高压盐水层分布的影响。研究表明,克拉苏构造带克深和大北工区地下盐岩的空间展布存在较大差异,先存的底辟构造、古隆起和盐岩的原始沉积边界导致不同区域的盐岩分布存在差异。研究区盐内可识别出的地震相模式可分为沉积型、流动型、褶皱型和断层型4类,不同类型的地震相指示了盐内不同的流变状态。纺锤型地震相是研究区最常见的、发育高压盐水的地震相,鞘褶皱的核部及平卧褶皱和断层共同封闭的空间也容易发育高压盐水。在钻遇上述地震相时,需要谨慎操作,可减少甚至避免钻井事故的发生。
3D seismic interpretation is used to analyze the special distribution of underground salt rock in Kelasu tectonic zone. The seismic facies modes within salt rock are established by well-seismic combination to explore the effect of salt rock deformation on the distribution of high-pressure saline aquifer. Research shows a significant difference in the spatial distribution of underground salt rock between Keshen and Dabei workareas. The differences in regional salt rock distributions result from the original sedimentary boundaries of previous diapir,palaeohigh and salt rock. The seismic facies modes of salt rock within the workarea that can be identified are classified into 4 categories,namely sedimentation,flow,fold and fault. Different seismic facies modes indicate different rheology states in the salt rock. Fusiform seismic facies with well-developed high-pressure saline aquifer is the most widely developed in this work area. High-pressure saline aquifer generally develops in the core of sheath fold and the area enclosed by both recumbent fold and fault. Careful operation is necessary when drilling above seismic facies,which could reduce or even prevent drilling accidents.
出处
《特种油气藏》
CAS
CSCD
北大核心
2016年第4期20-24,151-152,共5页
Special Oil & Gas Reservoirs
基金
国家重点基础研究发展计划"973"项目"火山岩油气藏的形成机制与分布规律"(2009CB219302)
关键词
库车前陆
中断带
克拉苏构造带
盐岩变形
高压盐水层
Kuqa foreland thrust belt
Kelasu tectonic zone
salt rock deformation
high-pressure saline aquifer
作者简介
王洪浩（1989-），男，2012年毕业于北京大学地质学专业，现为该校构造地质学专业在读博士研究生，从事盐构造相关研究工作。
