石油实验地质2012，Vol.34Issue(3)：319-324,329,7.
低勘探程度盆地烃源岩热演化及排烃史研究——以东海椒江凹陷为例
Research on thermal evolution and hydrocarbon expulsion history of source rocks in low-exploration basins:a case study on Jiaojiang Sag, East China Sea Basin
摘要
Abstract
In low-exploration basins, especially offshore ones, wells are rare and usually locate in the higher positions. The source rocks in basin centers are buried deeply and are not drilled. Therefore, it is the key for basin/ sag evaluation to study the thermal evolution and hydrocarbon expulsion history of source rocks in basin centers. Case studies have been carried out in the Jiaojiang Sag of the East China Sea Basin. Based on the measured temperature and Ro data collected from wells locating in the sag edge or the higher positions, by means of forward modeling method, the lithosphere structure and thermal history of the Jiaojiang Sag have been recovered, and the thermal history of Paleocene source rocks in the whole sag have been modeled. The results show that the maximum Ro of Paleocene source rocks in the sag is 2.8% , indicating over-mature state. The total amount of oil expulsion is a little bit more than that of gas expulsion, and the amount of hydrocarbon expulsion is 33×l08 m3 oil equivalent. Hydrocarbon expulsion mainly took place before Miocene. In the future exploration, the prospects with good traps and were formed before Miocene in the central uplifts should be focused on.关键词
烃源岩热演化/正演模拟/岩石圈结构/低勘探程度盆地/东海椒江凹陷Key words
thermal evolution of source rock/ forward modeling/ lithosphere structure/ low-exploration basin/ Jiaojiang Sag of East China Sea Basin分类
能源科技引用本文复制引用
仝志刚,赵志刚,杨树春,席小应,郝建荣,喻英梅..低勘探程度盆地烃源岩热演化及排烃史研究——以东海椒江凹陷为例[J].石油实验地质,2012,34(3):319-324,329,7.基金项目
国家重大科技专项(2008ZX05023-01)资助. （2008ZX05023-01）
