东营凹陷压力系统特征分析  

Analysis on the features of pressure system in Dongying sag.

作　　者：何新贞[1] 

机构地区：[1]胜利油田有限公司物探研究院

出　　处：《油气地质与采收率》2002年第4期21-23,共3页Petroleum Geology and Recovery Efficiency

摘　　要：在分析超压和低压形成机制的基础上 ,采用声波时差和地震速度的方法计算地层压力 ,研究了东营凹陷压力系统及其分布特征 ,分析认为凹陷内主要以利津洼陷和牛庄洼陷为中心构成两个超高压—高压系统 ,环利津洼陷和牛庄洼陷的断裂带为泄压区 ;在民丰洼陷和博兴洼陷只有小范围的超压区。压力系统的环带状分布受断裂和边缘粗碎屑沉积体分布的控制。在洼陷内部 ,断裂对压力系统起着明显的分隔作用。On the basis of the analysis about the origin of overpressure and lowpressure, pressure system of Dongying sag and its distribution features are studied, and formation pressure is calculated by the method of interval transit time and seismic velocity. It is considered that two super high pressure to high pressure systems exist in the sag mainly taking Lijin subsag and Niuzhuang subsag as center respectively; fault zones around Lijin subsag and Niuzhuang subsag are decompression area; overpressure area appears limited in scope in Minfeng subsag and Boxing subsag. The annularshape distribution of the system is controlled by the distribution of fractures and marginal coarse fragment sedimentary system. The fractures play a clear role of seperation in the pressure system inside the subsag.

关 键 词：东营凹陷 压力系统 特征分析 油气地质 流体压力 超压 泄压 

分 类 号：P618.130.2[天文地球—矿床学] TE12[天文地球—地质学]