准噶尔盆地西北缘百口泉区前陆冲断带撕裂断层特征及控藏作用
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摘要
以理论分析为基础,结合区域构造背景,阐述了撕裂断层的基本特征和识别标志。撕裂断层断面近直立,在地震剖面上多表现为波组错断、同相轴紊乱等特征;在水平时间切片上,表现为同相轴扭曲、宽窄和产状变化等特征;在测井曲线主要表现为隔夹层的频繁出现以及锯齿化程度的增强。研究表明,准噶尔盆地西北缘百口泉区三叠系具有一定规模的撕裂断层8条,延伸长度3~7 km。在此基础上,分析认为撕裂断层既可形成有效的运聚通道,又能够起遮挡作用而形成圈闭,对油气的运聚成藏具有重要的控制作用。
According to theoretical analysis,the features and recognition marks were described combined with the regional tectonic setting.The fault plane of tear fault is nearly vertical,and it usually shows discontinuity of wave group,disorder of seismic event on seismic section.On horizontal time slice,it reveals distortion,variation in width and attitude of seismic event.While for well logs,it results in the increase of interlayer frequency,and enhancement of sawtoothed curve.A certain size of northwest directional tear faults was firstly discovered in the northwestern margin of Junggar Basin.There are eight tear faults in Triassic strata of Baikouquan area,which extended from three to seven kilometers.The tear faults can not only be effective pathways for oil and gas migration and accumulation,but also block off the oil and gas on the side,and it has significant effects on hydrocarbon migration and accumulation.
According to theoretical analysis,the features and recognition marks were described combined with the regional tectonic setting.The fault plane of tear fault is nearly vertical,and it usually shows discontinuity of wave group,disorder of seismic event on seismic section.On horizontal time slice,it reveals distortion,variation in width and attitude of seismic event.While for well logs,it results in the increase of interlayer frequency,and enhancement of sawtoothed curve.A certain size of northwest directional tear faults was firstly discovered in the northwestern margin of Junggar Basin.There are eight tear faults in Triassic strata of Baikouquan area,which extended from three to seven kilometers.The tear faults can not only be effective pathways for oil and gas migration and accumulation,but also block off the oil and gas on the side,and it has significant effects on hydrocarbon migration and accumulation.
引文
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[10]刘和甫,夏义平,殷进垠,等.走滑造山带与盆地耦合机制[J].地学前缘,1999,(3):121-132.LIUHe-fu,XIA Yi-ping,YIN Jin-yin,et al.Couplingmechanism of strike-slip orogen and basin[J].EarthScience Frontiers,1999,(3):121-132.
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[14]王永刚,刘礼农.利用相干数据体检测断层与特殊岩性体[J].石油大学学报:自然科学版,2000,24(1):69-72.WANG Yong-gang,LIULi-nong.Automatic detection offaults and special lithologic body by using coherence al-gorithm[J].Journal of the University of Petroleum,Chi-na(Edition of Natural Science),2000,24(1):69-72.
[15]刘占军,高喜龙,李湘军,等.相干数据分析技术的应用及效果[J].油气地质与采收率,2002,9(6):18-19.LIU Zhan-jun,GAO Xi-long,LI Xiang-jun,et al.Ap-plication and effect of coherent data analysis technique[J].Petroleum Geology and Recovery Efficiency,2002,9(6):18-19.
[2]何登发,吕修祥,林永汉,等.前陆盆地分析[M].北京:石油工业出版社,1996.
[3]MORLEYC K.A classification of thrust fronts[J].AAPGBulletin,1986,10:12-25.
[4]刘和甫,梁慧社,蔡立国,等.天山两侧前陆冲断系构造样式与前陆盆地演化[J].地球科学,1994,19(6):727-741.LIU He-fu,LIANG Hui-she,CAI Li-guo,et al.Evolu-tion and structural style of Tianshan and adjacent basins,northwestern China[J].Earth Science-Journal of ChinaUniversity of Geosciences,1994,19(6):727-741.
[5]王平在,何登发,雷振宇,等.中国中西部前陆冲断带构造特征[J].石油学报,2002,23(3):11-17.WANG Ping-zai,HE Deng-fa,LEI Zhen-yu,et al.Tec-tonic features of foreland thrust belts in central and west-ern China[J].Acta Petrolei Sinica,2002,23(3):11-17.
[6]何登发,尹成,杜社宽,等.前陆冲断带构造分段特征——以准噶尔盆地西北缘断裂构造带为例[J].地学前缘,2004,11(3):91-101.HE Deng-fa,YIN Cheng,DU She-kuan,et al.Charac-teristics of structural segmentation of foreland thrustbelts——a case study of the fault belts in the northwest-ern margin of Junggar Basin[J].Earth Science Fron-tiers,2004,11(3):91-101.
[7]陶国亮,胡文?,张义杰,等.准噶尔盆地西北缘北西向横断裂与油气成藏[J].石油学报,2006,27(4):23-28.TAO Guo-liang,HU Wen-xuan,ZHANG Yi-jie,et al.NW-trending transverse faults and hydrocarbon accumula-tion in the northwestern margin of Junggar Basin[J].Ac-ta Petrolei Sinica,2006,27(4):23-28.
[8]尤姝妹.准噶尔盆地西北缘推覆构造的研究[J].新疆石油地质,1983,4(1):23-30.YOU Shu-mei.Structure study in west-north margin ofJunggar Basin[J].Xinjiang Petroleum Geology,1983,4(1):23-30.
[9]况军,齐雪峰.准噶尔前陆盆地构造特征与油气勘探方向[J].新疆石油地质,2006,27(1):5-9.KUANG Jun,QI Xue-feng.The structural characteristicsand oil-gas explorative direction in Junggar foreland basin[J].Xinjiang Petroleum Geology,2006,27(1):5-9.
[10]刘和甫,夏义平,殷进垠,等.走滑造山带与盆地耦合机制[J].地学前缘,1999,(3):121-132.LIUHe-fu,XIA Yi-ping,YIN Jin-yin,et al.Couplingmechanism of strike-slip orogen and basin[J].EarthScience Frontiers,1999,(3):121-132.
[11]漆家福,夏义平,杨桥.油区构造解析[M].北京:石油工业出版社,2006.
[12]李玲,冯许魁.用地震相干数据体进行断层自动解释[J].石油地球物理勘探,1998,33(增刊1):105-111.LI Ling,FENG Xu-kui.Automatic interpreting of faultusing seismic coherence cube[J].Oil Geophysical Pros-pecting,1998,33(sup.1):105-111.
[13]佘德平,曹辉,郭全仕.应用三维相干技术进行精细解释[J].石油物探,2000,39(2):83-88.SHE De-ping,CAO Hui,GUO Quan-shi.3-D coheren-cy cube technique applied to fine interpretation[J].Geo-physical Prospecting for Petroleum,2000,39(2):83-88.
[14]王永刚,刘礼农.利用相干数据体检测断层与特殊岩性体[J].石油大学学报:自然科学版,2000,24(1):69-72.WANG Yong-gang,LIULi-nong.Automatic detection offaults and special lithologic body by using coherence al-gorithm[J].Journal of the University of Petroleum,Chi-na(Edition of Natural Science),2000,24(1):69-72.
[15]刘占军,高喜龙,李湘军,等.相干数据分析技术的应用及效果[J].油气地质与采收率,2002,9(6):18-19.LIU Zhan-jun,GAO Xi-long,LI Xiang-jun,et al.Ap-plication and effect of coherent data analysis technique[J].Petroleum Geology and Recovery Efficiency,2002,9(6):18-19.
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