首页 | 本学科首页   官方微博 | 高级检索  
     

鄂尔多斯南部上古生界泥岩突破压力测井解释及区域预测
引用本文:石鸿翠,周江羽,王龙樟,等. 鄂尔多斯南部上古生界泥岩突破压力测井解释及区域预测[J]. 物探与化探, 2014, 0(1): 63-70
作者姓名:石鸿翠  周江羽  王龙樟  
作者单位:中国地质大学构造与油气资源教育部重点实验室,湖北武汉430074
基金项目:国家科技重大专项(2011ZX05005-002-007HZ).
摘    要:突破压力是泥质盖层封闭性能评价的关键参数,通过岩心实测数据与测井参数的相关分析,建立了声波时差与突破压力的关系,并依据此关系研究了鄂尔多斯盆地南部地区上古生界泥岩突破压力的垂向和平面分布规律。结果表明,突破压力西高东低、北高南低,且东西向压力差异显著。中二叠世早期开始,盆地南部湖相分布广泛,沉积速率快,泥质含量高,晚三叠世—早侏罗世盆地快速沉降,上石盒子组泥岩在叠加压实过程中排液受阻,发育异常高压,突破压力总体表现较低。下石盒子组沉积期及其以前,突破压力高值沿庆阳、延安及宜川呈弧形展布,低值沿南西向分布,从上石盒子时期开始,突破压力低压值的分布方向由研究区的南西向逐渐变化为南东向,高值则由东部和东北部迁移到西部及西南部。

关 键 词:盖层  突破压力  测井解释  异常高压  鄂尔多斯盆地

LOGGING INTERPRETATION AND REGIONAL PREDICTION OF MUDSTONE BREAKTHROUGH PRESSURES IN THE UPPER PALEOZOIC,SOUTH ORDOS BASIN
SHI Hong-cui,ZHOU Jiang-yu,WANG Long-zhang,SUN Mei-jing,XIANG Yuan-gao. LOGGING INTERPRETATION AND REGIONAL PREDICTION OF MUDSTONE BREAKTHROUGH PRESSURES IN THE UPPER PALEOZOIC,SOUTH ORDOS BASIN[J]. Geophysical and Geochemical Exploration, 2014, 0(1): 63-70
Authors:SHI Hong-cui  ZHOU Jiang-yu  WANG Long-zhang  SUN Mei-jing  XIANG Yuan-gao
Affiliation:( Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geoscienees, Wuhan 430074, China )
Abstract:The breakthrough pressure is the key parameter in evaluating the sealing capabilities of mudstone caprock. Through the cor-relation analysis of measured core pressures and logging data, the equation between the acoustic transit time and the breakthrough pres-sure was established and, on such a basis, the vertical and plane variation characteristics of mudstone breakthrough pressures in the Upper Paleozoic of south Ordos Basin were studied. The result showed that pressure values in the west and north areas were higher than those in the south and east, and pressure differences in the east-west direction were remarkable. Due to high deposition rate and clay content in the wide lake facies developed from early Middle Permian and rapid subsidence of basin from Late Triassic to Early Juassic, liquid discharge of mudstone in the Upper Shihezi Formation was blocked during the overlying compaction that caused abnormal high pressures and relatively low breakthrough pressures. Before and during the deposition of Lower Dhihezi Formation, high breakthrough pressures were distributed in arc along Qingyang, Yanan and Yichuan, low pressures were in the SW direction of the study area, while from the Upper Shihezi Formation period, low pressure distribution direction changed gradually southeastward and high pressures trans-ferred from the east and northeast of the study area to the west and southwest.
Keywords:caprock  breakthrough pressure  logging interpretation  abnormal high pressure  Ordos Basin
本文献已被 CNKI 维普 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号