应用地球化学方法评价断层的封闭性  

Evaluating Fault Sealing Using Geochemical Techniques

作　　者：侯读杰[1] 朱俊章[2] 唐友军[2] 徐新德 黄保家 

机构地区：[1]中国地质大学能源学院,北京100083 [2]长江大学分析测试研究中心,湖北荆州434023 [3]中海石油有限公司湛江分公司南海西部研究院,广东湛江524057

出　　处：《地球科学（中国地质大学学报）》2005年第1期97-101,共5页Earth Science-Journal of China University of Geosciences

基　　金：国家重点基础研究发展规划项目 (No .2 0 0 1CB2 0 91 0 0 1 )

摘　　要：断层的封闭性和连通性研究对于了解断层在油气成藏和石油开发中的影响具有重要的意义 .根据断层附近油藏的地球化学特征 ,可以研究排烃期断层的封闭性 .在涠西南凹陷油田的研究工作中 ,通过断层两端油层的化学组成指纹的差异 ,证实了断层的存在 ,虽然断距较小 ,但仍影响了油藏的连通 .对欧利坨子地区靠近断层的油藏分析表明 ,本区的深大断裂可以作为油气的有效通道 ,靠近断层油藏成熟度较高 ,且含氮化合物较丰富 .本研究提供的The fault sealing and reservoir continuity of different fault blocks is a very important issue for the study of oil filling histories and production. This study primarily considers the geochemical characteristics of petroleum reservoirs near faults, which can provide information about fault sealing in the geological record and hydrocarbons expulsion stage. Two research areas were chosen for the study of fault sealing in petroleum migration and reservoir continuity. One is in Weixinan sag, Beibuwan basin and the other is in Oulituozi region, Liaohe depression, Bohai Gulf basin. In the first locality, by analyzing geochemical chromatographic fingerprints, we found that a fault existed and was a major factor in poor reservoir continuity, although it is a small fault. The Oulituozi region geochemical and geological analysis shows that the oil pool near the fault has relatively high maturity and is abundant in pyrrolic nitrogen compounds. These results prove that the fault played an important role in petroleum migration. The two sites studied illustrate the advantages of geochemical techniques over other methods, in the study of fault sealing.

关 键 词：断层封闭性 地球化学方法 油藏地球化学 

分 类 号：P618.13[天文地球—矿床学]