主控断裂在南贝尔凹陷的控藏作用
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摘要
结合岩屑录井、岩心及地震资料,对南贝尔凹陷主控断裂特征进行综合分析,系统研究了其在油气成藏过程中的控制作用。认为主控断裂在断陷期近南北向拉张应力作用下对地区的构造格局形成起到了分割作用,结构总体表现为"二洼槽,一转换带、一潜山披覆带";在左旋运动及扭压反转作用下,派生出的次级断层控制构造圈闭的形成,断陷末期,主控断裂活动减弱,该格局对地区的沉积相带、储集层条件及烃源岩的分布造成很大影响,进而控制了南贝尔凹陷的油气分布。结合完钻井的试油生产数据,提出今后该地区的油气勘探方向。
This paper studies the characteristics and control action of the master fracture in the process of hydrocarbon accumulation in south Beier depression by analyzing sieve residue log,cores and seismic data.It is believed that the main fracture had segmented the tectonic pattern in faulting period under near NS tensile stress action,generally presenting " two sags,one transition zone and one buried hill drape";the secondary faults derived from sinistral movement and transpression-inversion action had controlled the formation of structural traps;in late faulting period,the movement of the master fracture weakened;such a pattern had significant impacts on regional sedimentary facies,reservoir conditions and source rock distribution,thus controlled oil and gas distribution in south Beier depression.Exploration targets are proposed for this region in conjunction with oil testing data.
This paper studies the characteristics and control action of the master fracture in the process of hydrocarbon accumulation in south Beier depression by analyzing sieve residue log,cores and seismic data.It is believed that the main fracture had segmented the tectonic pattern in faulting period under near NS tensile stress action,generally presenting " two sags,one transition zone and one buried hill drape";the secondary faults derived from sinistral movement and transpression-inversion action had controlled the formation of structural traps;in late faulting period,the movement of the master fracture weakened;such a pattern had significant impacts on regional sedimentary facies,reservoir conditions and source rock distribution,thus controlled oil and gas distribution in south Beier depression.Exploration targets are proposed for this region in conjunction with oil testing data.
引文
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[9]付广,孟庆芬,徐琴.乌尔逊凹陷南二段油气成藏与分布主控因素及有利区预测[J].吉林大学学报:地球科学版,2004,34(3):78-382.
[10]马新海,王金奎,王有功.南凹陷基底潜山油藏储层特征及成藏模式[J].特种油气藏,2011,18(2):33-36.
[11]陈会敏,李勖.二连盆地赛汉塔拉凹陷岩性油藏勘探[J].大庆石油地质与开发2008,27(5):30-33.
[2]王燮培,严俊君.含油气盆地构造样式研究中几个问题的讨论[J].地质科技情报,1996,15(4):51-55.
[3]陈均亮,吴河勇,朱德丰,等.海拉尔盆地构造演化及油气勘探前景[J].地质科学,2007,42(1):147-159.
[4]杨海波,朱彦平,谷社峰,等.松辽盆地北部反转构造特征及对铀成矿的作用[J].大庆石油地质与开发,2012,31(5):7-11.
[5]孟玮,等.东营凹陷北部陡坡带砂砾岩体分布规律[J].特种油气藏,2009,16(5):17-19.
[6]李军亮.渤海湾盆地东营凹陷深层砂砾岩储层成岩演化特征[J].石油实验地质,2008,30(3):252-255.
[7]徐会永,蒋有录,张立强.查干凹陷构造样式及其构造演化[J].油气地质与采收率,2008,5(4):13-15.
[8]沈华,等.伸展构造体系中反转构造研究[J].特种油气藏,2005,12(1):23-25.
[9]付广,孟庆芬,徐琴.乌尔逊凹陷南二段油气成藏与分布主控因素及有利区预测[J].吉林大学学报:地球科学版,2004,34(3):78-382.
[10]马新海,王金奎,王有功.南凹陷基底潜山油藏储层特征及成藏模式[J].特种油气藏,2011,18(2):33-36.
[11]陈会敏,李勖.二连盆地赛汉塔拉凹陷岩性油藏勘探[J].大庆石油地质与开发2008,27(5):30-33.
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