塔南凹陷基底潜山油藏储层特征及成藏模式
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摘要
通过大量的岩屑、岩心观察描述和统计分析,总结出塔南凹陷潜山油藏储层岩性以凝灰岩为主,储集空间类型以裂缝为主,其中裂缝结合孔洞型储层是最有利的储层储集空间类型。综合构造应力分析、基底岩性、基底地层地震属性分析等多个因素,认为塔南凹陷基底潜山油藏有利储层主要分布在塔南凹陷中部断裂潜山带中南部和北部。依据断裂和基底地层组合方式、圈闭类型和油气主要的运移方式,将塔南凹陷基底潜山油藏总结为3种成藏模式:不整合面输导结合有利砂岩层输导油气的上盘披覆式潜山油藏、断层输导结合不整合面输导油气的反向断层遮挡式潜山油藏和断层输导油气的古隆起式潜山油藏。
Observation of a substantial amount of cuttings and cores and statistical analysis have concluded that the buried hill reservoirs in the Tanan depression are dominated by tuff in lithology,by fractures in reservoir space,with fractures combining with cavities being the most favorable reservoir space.Comprehensive analysis of tectonic stress,basement lithology and seismic attribute indicates that favorable reservoirs distribute in the mid-south and north of the fractured buried hill belt in the middle of the Tanan depression.The basement buried hill reservoirs in the Tanan depression are classified into three types according to the configuration of fractures and basement formation,trap type and the way of hydrocarbon migration,including hanging wall drape type with unconformity surface and sand layer as hydrocarbon carrier,antithetic fault barrier type with faults and unconformity surface as the carrier,and palaeohigh type with faults as the carrier.
Observation of a substantial amount of cuttings and cores and statistical analysis have concluded that the buried hill reservoirs in the Tanan depression are dominated by tuff in lithology,by fractures in reservoir space,with fractures combining with cavities being the most favorable reservoir space.Comprehensive analysis of tectonic stress,basement lithology and seismic attribute indicates that favorable reservoirs distribute in the mid-south and north of the fractured buried hill belt in the middle of the Tanan depression.The basement buried hill reservoirs in the Tanan depression are classified into three types according to the configuration of fractures and basement formation,trap type and the way of hydrocarbon migration,including hanging wall drape type with unconformity surface and sand layer as hydrocarbon carrier,antithetic fault barrier type with faults and unconformity surface as the carrier,and palaeohigh type with faults as the carrier.
引文
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[2]刘传虎.潜山油气藏概论[M].北京:石油工业出版社,2006:132.
[3]张吉昌,綦玉明.裂缝型底水块状变质岩古潜山油藏改善开发效果研究[J].特种油气藏,2005,12(1):43-45.
[4]薛尚义.大民屯凹陷安福屯潜山油藏特征及油层分布[J].河南石油,2006,12(1):8-13.
[5]刘淑华,等.南堡油田古生界古潜山油藏裂缝描述预测及勘探[J].特种油气藏,2007,14(1):41-44.
[6]周英杰.裂缝性潜山油藏储集层识别与预测[J].中外能源,2006,11(3):21-25.
[7]刑玉忠,等.沈229潜山油藏裂缝分布规律研究[J].石油天然气学报,2006,28(3):32-34.
[8]张家震,王永诗,王学军,等.富台油田下古生界潜山油藏特征[J].油气地质与采收率,2003,10(4):23-25.
[9]张吉光.海拉尔盆地不整合的形成及其油气地质意义[J].大庆石油地质与开发,2002,21(5):8-10.
[10]付广,杨勉.断陷盆地油气成藏模式及分布特征[J].石油实验地质,2001,23(4):408-411.
[11]张文宾,陈守田,周俊宏.海拉尔盆地油气分布规律及成藏模式[J].大庆石油学院学报,2004,28(6):8-10.
[12]窦立荣.苏丹迈努特盆地油气成藏机理和成藏模式[J].矿物岩石地球化学通报,2005,24(1):50-56.
[13]陈章明,徐景祯.油气圈闭评价方法[M].哈尔滨:哈尔滨工业大学出版社,1998:13-22.
[14]罗群,白新华.断裂控烃理论与实践——断裂活动与油气聚集研究[M].武汉:中国地质大学出版社,1998:34-94.
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