东辛油田底辟伴生构造的形成机制与地球物理特征
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摘要
依据东辛油田高精度三维地震资料的精细解释结果对东辛油田底辟伴生构造形成机制和地球物理特征进行研究。结果表明:"Y"型断裂组合是东辛油田底辟伴生构造的普遍断裂样式,"X"型断层组合是形成断裂系统的主要因素;"X"型断层有两种切割方式,一种是在拱张集中区顶部出现,发生在同级或不同级断层间,另一种是在大断层为通道的拱张力作用造成的切割关系;断层的受力强弱应放在一定时间段来分析,在某一时间段低级序断层受到的应力会大于高级序断层,并切割高级序断层,这种新认识可以解释以往作多个砂层组图时出现的矛盾,也将一些被切断层的级序提高,有利于断层封堵性研究和合理的解释油水关系。
The forming mechanism and geophysical characteristics of associated diapir structure in Dongxin Oilfield were studied based on the seismic interpretation results of high-precision three-dimensional seismic data. The results show that "Y"-type fault combination is the common associated diapir structure in Dongxin Oilfield,and "X "type fault combination is a major factor in the formation of fault system. "X"-type faults,there are two cutting methods,one of which appears in the concentration area at the top of arch,taking place at the same grade or different grade faults; the other one is caused by tension at major faults in the arch for the passage. The pressure change of faults should be analyzed during fixed period. The pressure on lower grade faults is bigger than that on higher grade faults during certain period,and lower grade faults could cut through higher grade faults. This interpretation could solve multi-department structure mapping of the confusion,and some of the sequence was cut off grade level to improve, which could help in fault sealing analysis and reasonable interpretation of relations between oil and water.
The forming mechanism and geophysical characteristics of associated diapir structure in Dongxin Oilfield were studied based on the seismic interpretation results of high-precision three-dimensional seismic data. The results show that "Y"-type fault combination is the common associated diapir structure in Dongxin Oilfield,and "X "type fault combination is a major factor in the formation of fault system. "X"-type faults,there are two cutting methods,one of which appears in the concentration area at the top of arch,taking place at the same grade or different grade faults; the other one is caused by tension at major faults in the arch for the passage. The pressure change of faults should be analyzed during fixed period. The pressure on lower grade faults is bigger than that on higher grade faults during certain period,and lower grade faults could cut through higher grade faults. This interpretation could solve multi-department structure mapping of the confusion,and some of the sequence was cut off grade level to improve, which could help in fault sealing analysis and reasonable interpretation of relations between oil and water.
引文
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[2]于建国,李三忠,王金铎,等.东营凹陷盐底辟作用与中央隆起带断裂构造成因[J].地质科学,2005,40(1):55-68.YU Jian-guo,LI San-zhong,WANG Jin-duo,et al.Salt dlapirism and faulting of the central uplift belt in the Dongying sag Bohai bay Basin,north China[J].Chinese Journal of Geology,2005,40(1):55-68.
[3]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,LIU Li-nong.Automatic detection of faults and special lithologic body by using coherence algo-rithm[J].Journal of the University of Petroleum,China(Edition of Natural Science),2000,24(1):69-72.
[4]云金表,赵利华.东营凹陷中央隆起带构造特征、沙箱模拟与形成机制研究[J].地质力学学报,2003,9(2):113-121.YUN Jin-biao,ZHAO Li-hua.Research on molding,structural feature and formation mechanism of the central uplift belt in Dongying depression,Jiyang[J].Journal of Geomechanics,2003,9(2):113-121.
[5]王远坤.胜利油区东辛油田地质特征及含油气规律探讨[J].西安石油学院学报:自然科学版,1995,10(1):18-20.WANG Yuan-kun.Preliminary Investigation on the geo-logical features and oil bearing regularity of Dongxin Oil-field in Shengli oil area[J].Journal of Xian Petroleum Institute,1995,10(1):18-20.
[6]王伟.东营凹馅青坨子凸起馆陶组沉积相演化特征及相模式[J].石油与天然气学报,2009,31(3):167-170.WANG Wei.Facies evolution and depositional model of Guantao group in Qingtuozi heave[J].Journal of Oil and Gas Technology,2009,31(3):167-170.
[7]谢向阳,邓俊国,信荃麟,等.东辛油田断块模式及油气富集规律[J].石油勘探与开发,1997,24(2):25-27.XIE Xiang-yang,DENG Jun-guo,XIN Quan-lin,et al.Fault-block modes and hydrocarbon accumulation in Dongxin oil field[J].Petroleum Exploration and Devel-opment,1997,24(2):25-27.
[8]李春光.东营凹陷复杂断块油气田成因机制探讨[J].断块油气田,1994,1(3):3-12.LI Chun-guang.An inquiry into the formed mechanism for the complicated fault-block reservoirs in Dongying de-pression[J].Fault-Block Oil&Gas Field,1994,1(3):3-12.
[9]王伟,张世奇,纪友亮.青坨子凸起馆陶组地震相研究[J].断块油气田,2007,14(1):16-18.WANG Wei,ZHANG Shi-qi,JI You-liang.Seismic faci-es study of Guantao group in Qingtuozi heave[J].Fault-Block Oil&Gas Field,2007,14(1):16-18.
[10]蒋有录.东辛复杂断块油气田成藏特征[J].石油与天然气地质,1998,19(1):68-73.JIANG You-lu.Pool forming characters of complex fault block oil and gas fields in Dongxin[J].Oil&Gas Geol-ogy,1998,19(1):68-73.
[11]侯旭波,吴智平,李伟.济阳坳陷中生代负反转构造发育特征[J].中国石油大学学报:自然科学版,2010,34(1):18-28.HOU Xu-bo,WU Zhi-ping,LI Wei.Development char-acteristics of Mesozoic negative inversion structures in Jiyang depression[J].Journal of China University of Petroleum(Edition of Natural Science),2010,34(1):18-28.
[12]操应长,王健,刘惠民,等.东营凹陷南坡沙四上亚段滩坝砂体的沉积特征及模式[J].中国石油大学学报:自然科学版,2009,33(6):5-10.CAO Ying-chang,WANG Jian,LIU Hui-min,et al.Sedimentary characteristics and models of beach-bar sandbodies in the upper part of the fourth member of Pa-leogene in the south slope of Dongying depression[J].Journal of China University of Petroleum(Edition of Nat-ural Science),2009,33(6):5-10.
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