摘要
对昌都盆地上三叠统采集的25块流体包裹体样品进行了显微观察和显微测温、测盐等系统分析。显微观察结果证实了研究区古油藏的存在,同时指示晚三叠世早期存在活跃的油气运聚过程,晚期受热改造破坏而残留大量沥青。显微测温结果表明上三叠统发生过至少6幕流体充注,第1～4幕含烃流体活动明显。结合埋藏史分析可知,可能存在两期流体活动,分别发生在188.6～181.8Ma(早侏罗世中期)和174.0～157.1Ma(中侏罗世早期到晚侏罗世中期),其中第2期流体活动特征表现为连续充注的过程。
25 fluid inclusion samples have been taken the Upper Triassic in Changdu Basin. These samples are investigated by microscopic observations and micro-thermometry of homogenization temperature systematically. Microscopic observations indicate that the paleo-reservoir exists in the study area with active hydrocarbon generation-migration-accumulation processes in the early stage,but these processes must have been destroyed and reliced,leaving much bitumen. Micro-thermal analysis shows that there are six episodes of thermal fluid flow in the Upper Triassic,but the hydrocarbon fluid also appears in the first to the fourth episodes. Based on the homogenization temperatures,coupled with thermal and burial histories of the sedimentary basin,two fluid flow charging stages are determined to be 188.6-181.8 Ma（the Middle Early Jurassic） and 174.0-157.1 Ma（the Early Middle Jurassic-the Middle Late Jurassic）,and the second fluid flow charging stage is a continuous process.
出处
《地质科技情报》
CAS
CSCD
北大核心
2010年第2期82-86,共5页
Geological Science and Technology Information
基金
教育部重点科学技术研究项目(106113)
中国石油化工股份有限公司南方勘探开发分公司前瞻性课题(G0800-07-ZS-82)
