摘要
黄骅坳陷滨海地区沙河街组三段储层是中国深部油气勘探的新层位之一。为揭示该区油气成藏演化,对储层中流体包裹体岩相学特征、产出特征、包裹体均一温度和含油包裹体丰度进行了研究。结果表明,沙河街组三段储层中存在三期油气包裹体,分别代表了三期油气注入。Ⅰ期包裹体的均一温度为86℃～126℃,GOI为15%～35%,油气充注时期为36～25 Ma,开始有油气进入到储层中;Ⅱ期包裹体的均一温度为120℃～140℃,GOI为30%～60%,油气注入时期为27～12 Ma,烃源岩进入生排烃高峰期,发生大规模油气运聚,是主要的成藏时期;Ⅲ期包裹体的均一温度为138℃～155℃,GOI为1%～8%,油气注入时期为12～6 Ma,油气运移规模急剧减小。
The Es3 reservoir of Binhai area is a new field of deep oil-gas exploration in Huanghua depression.The authors analyze the petrography,occurrence,homogenization temperature and GOI of fluid inclusions with the aim of determining the evolution of oil-gas accumulation.The results show that there are three stages of hydrocarbon inclusion in the Es3 reservoir,indicating three hydrocarbon charging histories.The values of homogenization temperature and GOI from stage Ⅰ inclusion varied from 86℃ to 126℃ and from 15％ to 35％,respectively,indicating the hydrocarbon charging occurred during 37 ～ 25 Ma,with primary migration of oil and gas.Results from stage Ⅱ inclusion,showed values of homogenization temperature and GOI from 120℃ to 140℃ and from 30％ to 60％,respectively,suggesting hydrocarbon charging occurred during 27 ～12 Ma,the period was the most important forming time of oil-gas reservoirs,which the source rock generated hydrocarbon in its maximum amount.Values of homogenization temperature and GOI from stage Ⅲ inclusion ranged from 138℃ to 155℃ and from 1％ to 8％,respectively,implying that hydrocarbon charging occurred during 12 ～6 Ma,migration of hydrocarbon reduced rapidly.
出处
《世界地质》
CAS
CSCD
2014年第2期448-456,共9页
World Geology
基金
中国石油重大专项(2008E-0601)
