辽河坳陷曹台潜山太古宇高凝油藏封闭特征  

Sealing characteristics of the high pour-point oil reservoirs in the Archaeozoic buried hill of the Caotai area,Liaohe depression

作　　者：李军生[1,2] 庞雄奇[1] 宁金华[2] 初振淼[3] 

机构地区：[1]中国石油大学(北京)地球科学学院 [2]中国石油辽河油田公司勘探开发研究院 [3]中国石油辽河油田公司冷家油田开发公司

出　　处：《石油勘探与开发》2011年第2期191-195,共5页Petroleum Exploration and Development

基　　金：国家重点攻关课题"松辽盆地及渤海湾盆地北部复杂隐蔽油气藏地质评价和勘探开发关键技术研究"子课题(2001BA605A-08-04)

摘　　要：辽河坳陷曹台潜山埋藏较浅,缺乏良好区域盖层,油气成藏与局部封闭条件密切相关。对曹台潜山构造特征、地层特征、测井资料、油品性质进行综合分析,认为该区存在泥岩盖层封闭、异常流体压力封闭、断层封闭、岩脉封闭、物性封闭、高凝油自封闭和岩墙封闭等封闭形式,单种封闭类型和多种封闭类型的组合都能形成油气藏。从研究区已完钻井的资料分析,物性封闭、岩脉及岩墙封闭、断层封闭和高凝油自封闭是控制该区油气藏形成的主要封闭形式;古潜山具有良好的构造、储集层和油源条件,寻找和识别有效封闭盖层是寻找油气藏的关键。根据研究结果,该区已部署滚动探井多口,钻探效果明显,落实圈闭面积为5.6km2,预计可探明石油地质储量1200×104t。The Caotai buried hill is shallow and lack of good overlying regional seals.Hydrocarbon accumulation was closely related to the local sealing conditions.This study starts with the structural and stratigraphic characteristics of the Caotai buried hill,combines with logging and oil property data,and concludes after the multidisciplinary analysis that the seal types in the area include shale caprock seal,abnormal fluid pressure seal,fault seal,inclined dike seal,petrophysical seal,high pour-point oil self-seal and upstanding dike seal.Both a single seal type and the combination of multiple seal types can form hydrocarbon accumulation.According to the drilled wells in the study area,the sealing styles mainly include petrophysical seal,dike seal,fault seal,and high pour-point oil self-seal.The buried hill has good conditions of structure,reservoir and oil source,and finding and identifying effective seals is the key to discovering hydrocarbon accumulations.On the basis of this study,many progressive exploration wells have been arranged in this area and verified a promising result.The determined traps are 5.6 km2 in area,and the projected oil in place is 1 200×104 t.

关 键 词：太古宇潜山 混合花岗岩 高凝油藏 封闭特征 物性封闭 高凝油自封闭 岩墙封闭 辽河坳陷 

分 类 号：TE122.2[石油与天然气工程—油气勘探]