地质通报2011，Vol.30Issue(6)：911-915,5.
内蒙古西部额济纳旗及邻区二叠系烃源岩热演化与油气的关系
The relationship between the thermal evolution of Permian source rocks and oil and gas in Ejin Banner and its vicinities, western Inner Mongolia
摘要
Abstract
This research aims at analyzing the relationship between the geothermal evolution of Permian source rocks and hydrocarbon generation in Ejin Banner and its vicinities. Based on the information of vitrinite reflectance, temperature data of liquid-phase indusions and apatite fission tracks, the authors measured the paleogeothermal gradient of Ejin Banner area when it reached maximum gradient. Based on an analysis of the geothermal evolution history of Ejin Banner area, the authors investigated the relationship between the geothermal evolution and hydrocarbon generation. The results indicate that Ejin Banner area reached maximum gradient in Cretaceous period, with the paleogeothermal gradient being 4.1～5.5℃/100m. A comparison with the neighboring Chagan sag has revealed that the paleogeothermal gradient of Ejin Banner area was higher than its modern geothermal gradient. The Permian source rock geothermal evolution was mainly controlled by the paleogeothermal field. The research on the relationship between the geothermal evolution history and hydrocarbon generation indicates that some parts of Ejin Banner area entered into the hydrocarbon generation period in Late Permian. During the hydrocarbon-forming phase, the dry gas was dominant. In the Early Cretaceous period, the geothermal evolution of this area reached its maximum level.关键词
额济纳旗地区/二叠纪/热演化史/古地温梯度/磷灰石裂变径迹Key words
Ejin Banner area/ Permian/ thermal history/ geothermal gradient/ apatite fission-track path分类
天文与地球科学引用本文复制引用
韩伟,姜亭,李玉宏,魏建设..内蒙古西部额济纳旗及邻区二叠系烃源岩热演化与油气的关系[J].地质通报,2011,30(6):911-915,5.基金项目
中国地质调查局国土资源大调查项目《西北地区中小盆地群油气资源远景调查》(编号:1212010733506)资助 （编号:1212010733506）
