冀中坳陷前第三系顶面不整合结构特征及油气藏类型
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摘要
前第三系顶面不整合在冀中坳陷油气成藏和潜山形成过程中起重要作用.利用地震资料将冀中坳陷前第三系顶面不整合划分为断层-超覆不整合、削截-超覆不整合、断褶不整合、削截不整合和平行不整合等5种类型,其中断层-超覆不整合分布于陡坡带,削截-超覆不整合分布于缓坡带,断褶不整合多分布于中央隆起带,削截不整合多分布在凸起上,平行不整合则分布在生烃区.通过野外踏勘、岩心观察、录井与测井综合解释以及钻井泥浆漏失统计,将冀中坳陷前第三系顶面不整合纵向上划分为底砾岩、风化黏土层及风化淋滤带3层结构,其中风化淋滤带溶蚀孔、洞、缝十分发育,是油气运移和聚集的良好场所.目前已发现削截-超覆型油气藏、侵蚀潜山型油气藏和断褶不整合型油气藏等3类与不整合相关的油气藏.
The unconformities on the top of Pre-Tertiary play an important role in the accumulation of hydrocarbon and the formation of buried hill in Jizhong Depression.By the analyses of seismic data,the unconformities on the top of Pre-Tertiary can be divided into five types:fault-overlap unconformity,truncation-overlap unconformity,fault-fold unconformity,truncation unconformity and parallel unconformity.The fault-overlap unconformities distribute in steep slope belt;the truncation-overlap unconformities distribute in gentle slope belt;the fault-fold unconformities distribute in central uplift belt;the truncation unconformities distribute in uplift region;the parallel unconformities distribute in hydrocarbon generation region.By field investigation,core observation,well-logging response and drilling data,the unconformities on the top of Pre-Tertiary are vertically divided into three parts:basal conglomerate,weathered clay layer and leached zone.There are massive solution pores,holes and fractures in the leached zone,which is a good place where hydrocarbon migrates and accumulates.Currently,it is discovered that there are three types of oil and gas reservoirs related to the unconformities,they are runcation-overlap unconformity reservoirs,corrosion buried-hill reservoirs and fault-fold unconformity reservoirs.
The unconformities on the top of Pre-Tertiary play an important role in the accumulation of hydrocarbon and the formation of buried hill in Jizhong Depression.By the analyses of seismic data,the unconformities on the top of Pre-Tertiary can be divided into five types:fault-overlap unconformity,truncation-overlap unconformity,fault-fold unconformity,truncation unconformity and parallel unconformity.The fault-overlap unconformities distribute in steep slope belt;the truncation-overlap unconformities distribute in gentle slope belt;the fault-fold unconformities distribute in central uplift belt;the truncation unconformities distribute in uplift region;the parallel unconformities distribute in hydrocarbon generation region.By field investigation,core observation,well-logging response and drilling data,the unconformities on the top of Pre-Tertiary are vertically divided into three parts:basal conglomerate,weathered clay layer and leached zone.There are massive solution pores,holes and fractures in the leached zone,which is a good place where hydrocarbon migrates and accumulates.Currently,it is discovered that there are three types of oil and gas reservoirs related to the unconformities,they are runcation-overlap unconformity reservoirs,corrosion buried-hill reservoirs and fault-fold unconformity reservoirs.
引文
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[20]刘波,王英华,钱祥麟.华北奥陶系两个不整合面的成因与相关区域性储层预测[J].沉积学报,1997,15(1):25-30.LIU Bo,WANG Ying-hua,Qian Xiang-lin.The two ordovi-cian unconformities in N.China:Their origins and relatedregional reservoirs′prediction[J].Acta SedimentologicaSinica,1997,15(1):25-30.
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[22]苏立萍,罗平,邹伟宏,等.冀中坳陷斜坡带奥陶系潜山油气成藏条件分析[J].大地构造与成矿学,2003,5(2):191-196.SU Li-ping,LUO Ping,ZOU Wei-hong,et al.Hydrocarbonaccumulation conditions of the ordovician buried hills inthe slope zone of the Jizhong Depression[J].GeotectonicaEt Metallogenia,2003,5(2):191-196.
[23]韩宝平,陈锁忠,冯启言.任丘油田古潜山储集孔隙特征研究[J].中国矿业大学学报,1997,6(2):46-29.HAN Bao-ping,CHEN Suo-zhong,FENG Qi-yan.Study onstructure of pore and fissure of carbonate reservoir of buri-al hill in Renqiu Oilfield[J].Journal of China Universityof Mining&Technology,1997,6(2):46-29.
[24]赵红格,刘池洋.大兴断裂分段性研究[J].石油与天然气地质,2002,23(4):368-371.ZHAO Hong-ge,LIUChi-yang.Research on the segmenta-tion of Daxing fault[J].Oil&Gas Geology,2002,23(4):368-371.
[2]宁方兴.东营凹陷乐安油田不整合结构与油气聚集[J].中国石油勘探,2008(3):18-22.NING Fang-xing.Unconformity configuration and hydro-carbon accumulation in Lean Oilfield[J].China Petrole-um Exploration,2008(3):18-22.
[3]陈钢花,张蕾,宋国奇,等.测井资料在确定不整合面深度中的应用[J].石油物探,2008,47(3):311-314.CHEN Gang-hua,ZHANG Lei,SONG Guo-qi,et al.Ap-plication of logging data in identifying the depth of uncon-formity[J].Geophysical Prospecting for Petrdeum,2008,47(3):311-314.
[4]张营革,苏朝光,高秋菊,等.济阳坳陷不同序级不整合构造特征与地层油藏[J].大地构造与成矿学,2008,32(2):171-178.ZHANG Ying-ge,SU Chao-guang,GAO Qiu-ju,et al.Re-lationship between structural characteristics of various un-conformities and stratigraphic hydrocarbon accumulationin jiyang depression[J].Geotectonica Et Metallogenia,2008,32(2):171-178.
[5]陈涛,蒋有录,宋国奇,等.济阳坳陷不整合结构地质特征及油气成藏条件[J].石油学报,2008,29(4):499-503.CHEN Tao,JIANG You-lu,SONG Guo-qi,et al.Geolog-ical features and hydrocarbon reservoir of unconformitystructures in Jiyang Depression[J].Acta Petrolei Sinica,2008,29(4):499-503.
[6]隋风贵,赵乐强.济阳坳陷不整合结构类型及控藏作用[J].大地构造与成矿学,2006,30(2):161-167.SUI Feng-gui,ZHAO Le-qiang.The unconformity configu-ration type and its reservoir forming control in Jiyang de-pression[J].Geotectonica Et Metallogenia,2006,30(2):161-167.
[7]罗晓容,张立宽,廖前进,等.埕北断阶带沙河街组油气运移动力学过程模拟分析[J].石油与天然气地质,2004,19(1):19-23.LUO Xiao-rong,ZHANG Li-kuan,LIAO Qian-jin,et al.Simulation of hydrocarbon migration dynamics in ShahejieFormation of Chengbei fault step zone[J].Oil&Gas Ge-ology,2004,19(1):19-23.
[8]吴孔友,查明,肖敦清,等.黄骅坳陷埕北断坡不整合特征与油气成藏[J].古地理学报,2008,10(5):545-554.WUKong-you,ZHA Ming,XIAO Dun-qing,et al.Charac-teristics of unconformity and hydrocarbon accumulation inChengbei fault slope of Huanghua Depression[J].Journalof Palaeogeography,2008,10(5):545-554.
[9]陈涛,蒋有录,宋国奇,等.不整合研究中的化学风化指标[J].西南石油大学学报:自然科学版,2009,31(1):41-44.CHEN Tao,JIANG You-lu,SONG Guo-qi,et al.Applica-tion of chemical weathering indices in the study on uncon-formity[J].Journal of Southwest Petroleum University:Science&Technology Edition,2009,31(1):41-44.
[10]杨明慧,刘池阳,杨斌谊.冀中坳陷中生代构造变形的转换及油气[J].大地构造与成矿学,2001,6(2):113-119.YANG Ming-hui,LIU Chi-yang,YANG Bin-yi.Tec-tonic transform of the mesozoic and their relations to hy-drocarbon traps in the Jizhong(Central Hebei Province)Basin,China[J].Geotectonica Et Metallogenia,2001,6(2):113-119.
[11]杜金虎,邹伟宏,费宝生,等.冀中拗陷古潜山复式油气聚集区[M].北京:科学出版社,2002:490-496.
[12]彭兆蒙,彭仕宓,吴智平,等.华北地区三叠纪盆地格局及演化分析[J].西安石油大学学报:自然科学版,2009,24(2):34-38.PENG Zhao-meng,PENG Shi-mi,WU Zhi-ping,et al.Ba-sin pattern and evolution of Triassic in North China[J].Journal of Xi'an Shiyou University:Natural Science Edi-tion,2009,24(2):34-38.
[13]杨明慧,刘池阳,孙冬胜,等.冀中坳陷北区古近纪构造-沉积关系双向研究[J].西安石油学院学报:自然科学版,2002,17(6):12-15.YANG Ming-hui,LIU Chi-yang,SUN Dong-sheng,et al.Coupling relationship between structure and sedimentationin the north of Jizhong Basin during paleogene[J].Journalof Xi'an Shiyou University:Natural Science Edition,2002,17(6):12-15.
[14]曲江秀,查明,田辉,等.准噶尔盆地北三台地区不整合与油气成藏[J].新疆石油地质,2003,10(5):386-398.QU Jiang-xiu,ZHA Ming,TIAN Hui,et al.Unconformitiesand hydrocarbon accumulation in Beisantai Area,JunggarBasin[J].Xinjiang Petroleum Geology,2003,10(5):386-398.
[15]邹华耀,向龙斌,梁宏斌,等.冀中坳陷潜山油气运聚动力学特征及其类型[J].地球科学(中国地质大学学报),2001,1(1):67-72.ZOU Hua-yao,XIANG Long-bin,LIANG Hong-bin,et al.Dynamic models of petroleum migration and accumulationfor paleozoic-proterozoic buried hills in Jizhong depres-sion,Bohai Bay Basin[J].Earth Science(Journal of ChinaUniversity of Geosciences),2001,1(1):67-72.
[16]吴孔友,查明,洪梅.准噶尔盆地不整合结构模式及半风化岩石的再成岩作用[J].大地构造与成矿学,2003,27(3):270-276.WU Kong-you,ZHA Ming,HONG Mei.Structural modelsof unconformity and recurrent diagenesis of semi-weathe-ring rock in Junggar Basin[J].Geotectonica Et Metalloge-nia,2003,27(3):270-276.
[17]杨勇,查明.准噶尔盆地乌尔禾-夏子街地区不整合发育特征及其在油气成藏中的作用[J].石油勘探与开发,2007,6(3):304-309.YANG Yong,ZHAMing.Development of unconformity andits effect on the migration and accumulation of hydrocar-bon in Wu erhe-Xiazijie area,Junggar Basin[J].Petrole-um Exploration and Development,2007,6(3):304-309.
[18]陆克政.关于不整合的分类及其与油气藏的关系运聚[J].华东石油学院学报,1980(3):10-18.
[19]吴孔友,查明,柳广弟.准噶尔盆地二叠系不整合面及其油气运聚特征[J].石油勘探与开发,2002,29(2):53-57.WUKong-you,ZHAMing,LIUGuang-di.The unconformi-ty surface in the Permian of Junggar Basin and the charac-ters of oil-gas migration and accumulation[J].PetroleumExploration and Development,2002,29(2):53-57.
[20]刘波,王英华,钱祥麟.华北奥陶系两个不整合面的成因与相关区域性储层预测[J].沉积学报,1997,15(1):25-30.LIU Bo,WANG Ying-hua,Qian Xiang-lin.The two ordovi-cian unconformities in N.China:Their origins and relatedregional reservoirs′prediction[J].Acta SedimentologicaSinica,1997,15(1):25-30.
[21]周小军,林畅松,李三忠,等.沉积盆地内不整合界面组合样式[J].西南石油大学学报:自然科学版,2008,30(4):6-10.ZHOU Xiao-jun,LIN Chang-song,LI San-zhong,et al.Spatial pattern of unconformities in depositional basin[J].Journal of Southwest Petroleum University:Science&Technology Edition,2008,30(4):6-10.
[22]苏立萍,罗平,邹伟宏,等.冀中坳陷斜坡带奥陶系潜山油气成藏条件分析[J].大地构造与成矿学,2003,5(2):191-196.SU Li-ping,LUO Ping,ZOU Wei-hong,et al.Hydrocarbonaccumulation conditions of the ordovician buried hills inthe slope zone of the Jizhong Depression[J].GeotectonicaEt Metallogenia,2003,5(2):191-196.
[23]韩宝平,陈锁忠,冯启言.任丘油田古潜山储集孔隙特征研究[J].中国矿业大学学报,1997,6(2):46-29.HAN Bao-ping,CHEN Suo-zhong,FENG Qi-yan.Study onstructure of pore and fissure of carbonate reservoir of buri-al hill in Renqiu Oilfield[J].Journal of China Universityof Mining&Technology,1997,6(2):46-29.
[24]赵红格,刘池洋.大兴断裂分段性研究[J].石油与天然气地质,2002,23(4):368-371.ZHAO Hong-ge,LIUChi-yang.Research on the segmenta-tion of Daxing fault[J].Oil&Gas Geology,2002,23(4):368-371.
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