OIL AND GAS MIGRATION PERIODS AND ACCUMULATION PROCESS IN CENTRAL ANTICLINAL ZONE IN THE XIHU SAG, THE EAST CHINA SEA BASIN
-
摘要: 利用包裹体测温和成岩矿物伊利石测年数据资料,对东海盆地西湖凹陷中央背斜带油气运移及成藏的基本模式进行了研究。中央背斜带储层流体包裹体明显分为盐水包裹体和有机包裹体,包裹体均一化温度分为3期,其对应的地质时间分别为中中新世、中新世晚期和上新世—第四纪。储层自生伊利石同位素地质年龄自北向南分别为23.5～26.5,18.31～21.86,12.58～13.63 Ma,表明北部油气成藏时间早于中部和南部。综合分析认为中央背斜带发生过早、中、晚3期油气运移和聚集活动,以晚期最为重要,其幕式特征明显。成藏期总体时间长,多期成烃,多次充注,同期不同源,是中央背斜带油气成藏的基本模式。Abstract: By means of inclusion thermometry and authigenic illite dating data,the oil and gas migration and accumulation model in the central anticlinal zone in the Xihu Sag of the East China Sea Basin has been studied.Fluid inclusions in reservoirs in the central anticlinal zone can be divided into salt water inclusion and organic inclusion.Homogenization temperatures of inclusions can be devided into three periods and their accordingly geologic periods are Middle Miocene,Later Miocene and Pliocene to Quaternary respectively.Isotope ages of authigenic illite in reservoir are 23.5～26.5 Ma,18.31～21.86 Ma and 12.58～13.63 Ma from north to south.This shows that the time of oil and gas accumulation in the northern part is earlier than ones in the middle and southern parts.The research result shows that there are three phases of oil and gas accumulation in the central anticlinal zone and the late-accumulation phase is the most important.Multiple phases of hydrocarbon generation,multiple recharging,multiple accumulation and multiple source rocks are fundamental oil and gas accumulation models in the zone.
-
[1] 张厚福,方朝亮,张枝焕等.石油地质学[M].第2版.北京:石油工业出版社,1999.183～191. [2] 李明诚.石油与天然气运移[M].第2版.北京:石油工业出版社,1994.1～89. [3] 侯建国,任丽华,董春梅.有机包裹体技术在油气运移与聚集中的应用研究[J].石油实验地质,2005,27(4):409～413. [4] 王飞宇,郝石生.有机岩石学及其在油气勘探中的应用[J].石油大学学报(自然科学版),1996,20(6):107～115. [5] 张有瑜,罗修泉.油气储层自生伊利石K-Ar同位素年代学研究现状与展望[J].石油与天然气地质,2004,25(2):231～236. [6] 陶瑞明.东海西湖凹陷天然气成藏条件及分布规律[J].天然气工业,1996,16(5):10～15. [7] 施继锡.有机包裹体及其与油气的关系[J].中国科学(B),1987,(7):318～325. [8] 刘小平,徐健,杨立干.有机包裹体在油气运聚研究中的应用—以苏北盆地高邮凹陷为例[J].石油实验地质,2004,26(1):94～99. [9] 张金亮.利用流体包裹体研究油藏注入史[J].西安石油学院学报,1998,13(4):1～4. [10] 周瑾.西湖凹陷中央背斜带两种热机制下烃源岩的热演化[J].中国海上油气(地质),2003,17(1):64～68. [11] 王震,张明利,王子煜等.东海陆架盆地西湖凹陷不整合面剥蚀厚度恢复[J].石油实验地质,2005,27(1):90～93. [12] 王飞宇,何萍,张水昌等.利用自生伊利石K-Ar定年分析烃类进入储层的时间[J].地质论评,1997,43(5):540～545. [13] Liewig N,Clauer N,Sommer F.Rb-Sr and K-Ar dating of clay diagenesis in Jurassic sandstone oil reservoir,North Sea[J].AAPG Bull,1987,71:1467～1474. [14] 杨永泰,邹才能,李伟等.吐哈盆地鄯深构造三叠系油藏成藏期次分析[J].石油学报,2002,23(2):22～25. [15] 陈晓东.西湖凹陷黄岩7-1及14-1油气藏特征及成藏模式[J].中国海上油气(地质),2003,17(1):57～63 -
计量
- 文章访问数: 772
- HTML全文浏览量: 56
- PDF下载量: 421
- 被引次数: 0
下载:
苏公网安备32021102000780号