摘要
为了解决克拉苏构造带西段新生代砾岩层引起的速度变化和工程决策问题,利用高分辨率的三维地震数据体、非地震电阻率数据体、地震-非地震联合反演阻抗体、野外地质露头信息和钻井岩屑等资料,对砾岩层的沉积特征及分布规律进行了系统研究.认为库车坳陷新近系-第四系砾岩层可以划分为四期,具有冲积扇、扇三角洲及冲积平原三种沉积成因,它们的规模、水动力条件及沉积构造等具有较大差异.以冲积扇砾岩层规模大,冲积平原相规模次之,扇三角洲相砾岩层发育规模最小.砾岩层整体具有纵向上多期次连续发育、相带差异明显,横向上相变快、集中分布的特点,新生代构造演化、构造样式及南北向断裂是控制砾岩层发育、沉积特点及分布规律的主要因素.
Based on the outcrop investigation,high resolution 3 D seismic data,3 D resistivity data and core borings identification,we systematically studied the cycle of development,the sedimentary and distribution characteristics of Neogene-Quaternary gravel layers of westen Kelasu structure belt in Kuqa Depression,to solve the problems of velocity changes and engineering decision. We analysed the thicknes,lithology,structures,tectonic and gravel composition of different outcrops and rock debris,and correlate gravel layers of all period. We presume that there were four periods which developed thick gravel layers,and the sedimentary origins of gravel layers could be alluvial fan,fan delta and fluvial plain. All gravels had four provenance systems,in which there developed different gravel composition. The gravel layers of westen Kelasu structure belt continuously developed in different periods vertically,and had different facies which changed fast laterally. The tectonic evolution,tectonic style,and the north-south faults were the main factors which influenced the sedimentary characteristics,distribution of the gravel layers.
作者
李磊
刘永雷
刘晓光
丁嘉
李炎
王井伶
蔡剑锋
LI Lei;LIU Yonglei;LIU Xiaoguang;DING Jia;LI Yan;WANG Jingling;CAI Jianfeng(BGP Inc.,China National Petroleum Corporation,Korla 841000,Xinjiang China;China University of Petroleum(BeiJing),BeiJing 102249,China)
出处
《河南科学》
2019年第10期1659-1664,共6页
Henan Science
基金
国家科技重大专项资助（2016ZX05053）
关键词
克拉苏构造带西段
砾岩层
地震-非地震联合反演
冲积扇
构造演化
western Kelasu structural belt
gravel layers
joint seismic and non-seismic inversion
alluvial fan
structure evolution
