六盘山盆地南部白垩系油气成藏条件分析
|
摘要
六盘山盆地白垩系为主要勘探层系之一,在南部下白垩统中见较多油气显示,展示较好的勘探潜力。通过对烃源岩、储盖特征、圈闭以及油气运聚史等各种地质要素进行梳理和评价,明确其对油气成藏的控制作用。结果表明,盆地南部下白垩统李洼峡组中段和马东山组两套烃源岩具有一定的生烃能力,白垩系发育两套储盖组合,其中储集层具有低孔低渗、与烃源岩相互叠置且累计厚度大的特点;受构造活动的影响,油气在晚白垩世和渐新世晚期发生过两个期次充注;盆地南部各成藏要素间时空匹配关系较为合理,弱改造区的古油藏以及强改造区的完整构造圈闭为下一步勘探的有利方向。
Liupanshan Cretaceous basin is one of the most important exploration strata and there are more hydrocarbon shows in lower Cretaceous in the south,which shows a good exploration potential in this area.Through analysis and evaluation of hydrocarbon accumulation elements such as hydrocarbon source rocks,reservoir-cover features,trap,hydrocarbon migration and accumulation history,the controlling effect of these geological elements on hydrocarbon accumulation has been clarified.The results indicate two sets of source rocks,namely the middle member of Liwaxia formation and Madongshan formation from lower Cretaceous in southern Liupanshan basin,are considered to be capable of generating hydrocarbon.Two sets of reservoir-cap assemblages have been developed,among which the reservoir is characterized by low porosity and low permeability,superimposing with source rocks and large gross thickness.Influenced by the tectonic activities,two phase of hydrocarbon filling have occurred in late Cretaceous and late Oligocene.The matching relationship among different accumulation elements is reasonable,the paleo-oil reservoir in weakly reworked area and complete structural traps in intensely reworked area are the most favorable targets for further exploration.
Liupanshan Cretaceous basin is one of the most important exploration strata and there are more hydrocarbon shows in lower Cretaceous in the south,which shows a good exploration potential in this area.Through analysis and evaluation of hydrocarbon accumulation elements such as hydrocarbon source rocks,reservoir-cover features,trap,hydrocarbon migration and accumulation history,the controlling effect of these geological elements on hydrocarbon accumulation has been clarified.The results indicate two sets of source rocks,namely the middle member of Liwaxia formation and Madongshan formation from lower Cretaceous in southern Liupanshan basin,are considered to be capable of generating hydrocarbon.Two sets of reservoir-cap assemblages have been developed,among which the reservoir is characterized by low porosity and low permeability,superimposing with source rocks and large gross thickness.Influenced by the tectonic activities,two phase of hydrocarbon filling have occurred in late Cretaceous and late Oligocene.The matching relationship among different accumulation elements is reasonable,the paleo-oil reservoir in weakly reworked area and complete structural traps in intensely reworked area are the most favorable targets for further exploration.
引文
[1]宗立一,李陇堂,温万成,等.宁夏六盘山盆地中新生代地质演化研究[J].宁夏大学学报(自然科学版),2012,33(2):214-219.
[2]杨福忠,社荣.六盘山盆地中、新生代构造演化和油气勘探[J].新疆石油地质,2001,22(3):192-195.
[3]汤济广,梅廉夫,李祺,等.六盘山盆地构造演化及对成藏的控制[J].石油天然气学报(江汉石油学院学报),2009,31(5):1-6.
[4]万丛礼,付金华,张军.鄂尔多斯西缘前陆盆地构造热事件与油气运移[J].地球科学与环境学报,2005,27(2):43-47.
[5]赵海华,崔红庄,王军,等.六盘山盆地西南缘构造样式及勘探意义[J].东北石油大学学报,2013,37(4):9-17.
[6]杨东,方小敏,宋友桂,等.六盘山西侧山麓剥蚀面的发育与新构造隆升[J].沉积学报,2002,20(2):282-287.
[7]王伟.东营凹陷新近系馆陶组油气成藏条件分析[J].石油地质与工程,2012,26(3):28-31.
[8]郇玉龙,崔红庄,尚应军,等.六盘山盆地构造样式与油气分布[J].海洋地质前沿,2011,27(5):31-34.
[9]刘进.流体包裹体在盆地热史研究中的应用与问题讨论[J].河南石油,2006,20(4):13-17.
[10]郑德文,张培震,万景林,等.六盘山盆地热历史的裂变径迹证据[J].地球物理学报,2005,48(1):157-164.
[11]任战利.中国北方沉积盆地热演化史的对比[J].石油与天然气地质,2000,21(1):33-37.
[12]杨建鹏.鄂尔多斯盆地合水地区长4+5储层特征与低渗成因探讨[J].石油地质与工程,2011,25(2):23-26.
[13]张驰,王峰,田景春,等.鄂尔多斯盆地马岭地区延长组长8段储层特征及综合评价[J].石油地质与工程,2015,29(1):45-48.
[14]郑丹,赵海华,王军.六盘山盆地西南缘马东山断层活动性分析[J].江汉石油职工大学学报,2015,28(1):1-3.
[2]杨福忠,社荣.六盘山盆地中、新生代构造演化和油气勘探[J].新疆石油地质,2001,22(3):192-195.
[3]汤济广,梅廉夫,李祺,等.六盘山盆地构造演化及对成藏的控制[J].石油天然气学报(江汉石油学院学报),2009,31(5):1-6.
[4]万丛礼,付金华,张军.鄂尔多斯西缘前陆盆地构造热事件与油气运移[J].地球科学与环境学报,2005,27(2):43-47.
[5]赵海华,崔红庄,王军,等.六盘山盆地西南缘构造样式及勘探意义[J].东北石油大学学报,2013,37(4):9-17.
[6]杨东,方小敏,宋友桂,等.六盘山西侧山麓剥蚀面的发育与新构造隆升[J].沉积学报,2002,20(2):282-287.
[7]王伟.东营凹陷新近系馆陶组油气成藏条件分析[J].石油地质与工程,2012,26(3):28-31.
[8]郇玉龙,崔红庄,尚应军,等.六盘山盆地构造样式与油气分布[J].海洋地质前沿,2011,27(5):31-34.
[9]刘进.流体包裹体在盆地热史研究中的应用与问题讨论[J].河南石油,2006,20(4):13-17.
[10]郑德文,张培震,万景林,等.六盘山盆地热历史的裂变径迹证据[J].地球物理学报,2005,48(1):157-164.
[11]任战利.中国北方沉积盆地热演化史的对比[J].石油与天然气地质,2000,21(1):33-37.
[12]杨建鹏.鄂尔多斯盆地合水地区长4+5储层特征与低渗成因探讨[J].石油地质与工程,2011,25(2):23-26.
[13]张驰,王峰,田景春,等.鄂尔多斯盆地马岭地区延长组长8段储层特征及综合评价[J].石油地质与工程,2015,29(1):45-48.
[14]郑丹,赵海华,王军.六盘山盆地西南缘马东山断层活动性分析[J].江汉石油职工大学学报,2015,28(1):1-3.