石油实验地质2017，Vol.39Issue(2)：213-221,9.DOI:10.11781/sysydz201702213
胶莱盆地莱阳凹陷莱西断层断裂性质及成因机制
Fracture properties and formation mechanism of Laixi fault in Laiyang Sag, Jiaolai Basin
摘要
Abstract
The Laixi fault was identified and described, and its geometric features and formation mechanism were also analyzed based on the gravity data and new 2D seismic data of the Laiyang Sag in order to clarify the fracture properties and formation mechanism of the Laixi fault. Several structural styles were found in the Laixi fault, such as zonal distribution, flower structure and dolphin effect. The geologic bodies on both sides of the fault showed a sinistral offset of 4.4 km, indicating a typical sinistral strike-slip fault. From the Late Cretaceous to Paleocene, the tectonic stress field in the study area was NEE-SWW compression. The activity of the Muping-Jimo fault zone converted from extension to dextral strike-slip, while the Laixi fault had an opposite direction, which was a conjugate strike slip fault of the Muping-Jimo fault zone. The Laixi fault did not control the sediment of the Cre-taceous;therefore, it was not a concave boundary fault in the west of the Laiyang Sag, but an internal split fault, which cut the Laiyang Sag into two parts.关键词
共轭断层/走滑断层/牟平—即墨断裂带/莱西断层/莱阳凹陷/胶莱盆地Key words
conjugate fault/strike-slip fault/Muping-Jimo fault zone/Laixi fault/Laiyang Sag/Jiaolai Basin分类
能源科技引用本文复制引用
张波,吴智平,刘华,李众..胶莱盆地莱阳凹陷莱西断层断裂性质及成因机制[J].石油实验地质,2017,39(2):213-221,9.基金项目
中国石油化工股份有限公司油气勘探专项( P13134)资助. （ P13134）
