渤中凹陷西次洼断裂演化特征及控藏作用
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摘要
渤中凹陷西次洼位于渤海西部海域,勘探程度相对较低,受区域应力影响,断裂特征复杂多样。为了搞清研究区断裂的发育规律及其控藏作用,利用新三维地震资料,并结合勘探实践,在不同时期形成断裂划分及特征分析的基础上,对断裂的成因演化及断裂对油气成藏的控制作用进行了探讨。研究结果表明:渤中凹陷西次洼的断裂演化阶段可以划分为早期基底断裂左旋走滑阶段、古近纪伸展作用阶段和新近纪—第四纪(新构造运动时期)双向走滑作用阶段。断裂的形成和演化控制了沉积体系的发育,形成了多种类型圈闭,为油气垂向运移提供了主要的运移通道。研究成果对该区目标优选及油气勘探评价具有指导意义。
West Subsag in Bozhong Sag is located in West Bohai,which is characterized by relatively lower exploration degree. Influenced by the regional stress,the fault characteristics are complex and diversified. In order to make clear of the development laws and controlling actions of the faults on the hydrocarbon accumulation in the study area,with the help of the new 3D seismic data and combined with the exploration practice,on the basis of the developed fault classification and the characteristic analysis in different periods,the origin evolution of the faults and their controlling actions on the hydrocarbon accumulation were discussed. The study achievements show that the evolutionary stages of West Subsag in Bozhong Sag can be divided into the sinistral strike-slip period of the early basement,Paleogene extension period and Neogene-Quaternary( new structural movement period) bidirectional strike-slip period. The development and evolution of the faults control the development of the sedimentary system,and form various types of the trap,and moreover present the main channels of the vertical petroleum migration. The research achievements have the guiding significances for the target choice and the oil-gas exploration evaluation in the area.
West Subsag in Bozhong Sag is located in West Bohai,which is characterized by relatively lower exploration degree. Influenced by the regional stress,the fault characteristics are complex and diversified. In order to make clear of the development laws and controlling actions of the faults on the hydrocarbon accumulation in the study area,with the help of the new 3D seismic data and combined with the exploration practice,on the basis of the developed fault classification and the characteristic analysis in different periods,the origin evolution of the faults and their controlling actions on the hydrocarbon accumulation were discussed. The study achievements show that the evolutionary stages of West Subsag in Bozhong Sag can be divided into the sinistral strike-slip period of the early basement,Paleogene extension period and Neogene-Quaternary( new structural movement period) bidirectional strike-slip period. The development and evolution of the faults control the development of the sedimentary system,and form various types of the trap,and moreover present the main channels of the vertical petroleum migration. The research achievements have the guiding significances for the target choice and the oil-gas exploration evaluation in the area.
引文
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[2]周士科,魏泽典,邓宏文,等.渤中凹陷古近系构造层序研究[J].中国海上油气,2006,18(4):236.
[3]徐春强,王德英,张新涛,等.渤中凹陷西次洼新近系油气成藏主控因素及有利勘探方向[J].地球科学与环境学报,2016,38(2):217-225.
[4]王启明,王德英,于海波,等.渤中凹陷西次洼东营组储层特征及其控制因素[J].沉积与特提斯地质,2013,33(1):62.
[5]庞小军,王清斌,杜晓峰,等.渤中凹陷西北缘古近系物源演化及其对储层的影响[J].大庆石油地质与开发,2016,35(5):34-41.
[6]夏庆龙,田立新,周心怀,等.渤海海域构造形成演化与变形机制[M].北京:石油工业出版社,2012.
[7]李慧勇,茆利,王粤川,等.渤海沙垒田凸起北部中央走滑带断裂对圈闭的控制[J].天然气勘探与开发,2014,37(2):1-4.
[8]陈树光,任建业,吴峰,等.渤中坳陷沙北地区古地貌恢复及其应用[J].特种油气藏,2015,22(2):52-55.
[9]王永利,陈树光.渤中坳陷沙北地区构造—沉积分析[J].油气地质与采收率,2015,22(4):26-32.
[10]孙永河,漆家福,吕延防,等.渤中坳陷断裂构造特征及其对油气的控制[J].石油学报,2008,29(5):669-675.
[11]陈书平,吕丁友,王应斌,等.渤海盆地新近纪—第四纪走滑作用及油气勘探意义[J].石油学报,2010,31(6):894-899.
[12]周心怀,牛成民,滕长宇.环渤中地区新构造运动期断裂活动与油气成藏关系[J].石油与天然气地质,2009,30(4):469-475.
[13]庞小军,王清斌,王飞龙,等.渤中凹陷西北缘边界断层面特征与油气成藏[J].特种油气藏,2016,23(5):43-47.
[14]王超.不同时期形成断裂特征及其控藏作用[J].大庆石油地质与开发,2015,34(4):28-32.
[15]龚再升,王国纯.渤海新构造运动控制晚期油气成藏[J].石油学报,2001,22(2):1-7.
[16]李大伟.新构造运动与渤海湾盆地上第三系油气成藏[J].石油与天然气地质,2004,25(2):170-174.