东营凹陷古近系超压顶界面分布特征及其影响因素
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摘要
对比分析利用实测压力和超压层段的测井响应特征两种方法研究超压顶界面的优缺点,认为后者具有更加坚实的理论基础,并采用该方法对东营凹陷古近系超压顶界面的分布特征及其影响因素进行研究。结果表明:古近系超压顶界面主要分布于沙三中亚段的厚层泥岩中,反映在地震层序上为T4与T6反射界面之间,表现出一定的"层控性"特征,其埋藏深度主要为2.4～2.8 km,在平面上表现为凹陷中心深而边缘浅的特征;超压顶界面之下的岩性为一套以深灰色泥岩、灰质泥岩及砂质泥岩为主的泥质岩组合,泥质岩的岩性构成及沉积速率在一定程度上控制了超压顶界面的层位分布,而抬升剥蚀、断裂活动及盐底辟作用是造成部分地区超压顶界面变浅的主要因素。
Pressure measurement and logging response analysis are two common methods used to study the top of overpressure(TOO) in petroleum industry.Due to the more reliable theory basis,the latter was used to analyze the distribution and influencing factors of the Paleogene TOO in Dongying depression,Jiyang Basin.The results show that the Paleogene TOO is mainly restricted within the thick mudstones in the middle part of the third member of Shahejie formation and corresponds to the interval between T4 and T6 reflecting interfaces in seismic sequences,which suggests the feature of strata-controlled.The burial depth of this TOO ranges from 2.4 km to 2.8 km and shallows from the central to the margin.Sedimentary rocks below the TOO are composed of dark grey mudstone,calcareous mudstone and sandy mudstone.The horizontal distribution of TOO is partly controlled by lithology and deposition rate of underlying argillaceous rock,while tectonic uplift and denudation,faulting movement as well as salt diapirsm are the primary causes of the shallowing of the TOO in certain areas.
Pressure measurement and logging response analysis are two common methods used to study the top of overpressure(TOO) in petroleum industry.Due to the more reliable theory basis,the latter was used to analyze the distribution and influencing factors of the Paleogene TOO in Dongying depression,Jiyang Basin.The results show that the Paleogene TOO is mainly restricted within the thick mudstones in the middle part of the third member of Shahejie formation and corresponds to the interval between T4 and T6 reflecting interfaces in seismic sequences,which suggests the feature of strata-controlled.The burial depth of this TOO ranges from 2.4 km to 2.8 km and shallows from the central to the margin.Sedimentary rocks below the TOO are composed of dark grey mudstone,calcareous mudstone and sandy mudstone.The horizontal distribution of TOO is partly controlled by lithology and deposition rate of underlying argillaceous rock,while tectonic uplift and denudation,faulting movement as well as salt diapirsm are the primary causes of the shallowing of the TOO in certain areas.
引文
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[18]张善文,张林晔,张守春,等.东营凹陷古近系异常高压的形成与岩性油藏的含油性研究[J].科学通报,2009,54(11):1570-1578.ZHANG Shan-wen,ZHANG Lin-ye,ZHANG Shou-chun,et al.Formation of abnormal high pressure and itsapplication in the study of oil-bearing property of lithol-ogic hydrocarbon reservoirs in the Dongying sag[J].Chingese Sci Bull,2009,54(11):1570-1578.
[19]张守春.东营凹陷异常压力形成机制及其与成烃成藏的关系[D].青岛:中国石油大学地球科学与技术学院,2010.ZHANG Shou-chun.The relationship between the mech-anism of abnomal pressure formation and hydrocarbongeneration and entrapment in the Dongying depression[D].Qingdao:School of Geosciences in China Universi-ty of Petroleum,2010.
[20]郝芳.超压盆地生烃作用动力学与油气成藏机理[M].北京:科学出版社,2005.
[2]HUNT J M.Generation and migration of petroleum fromabnormal pressure fluid compartment[J].AAPG Bulle-tin,1990,74(1):1-12.
[3]郝芳,董伟良.沉积盆地超压系统演化、流体流动与成藏机理[J].地球科学进展,2001,16(1):79-85.HAO Fang,DONG Wei-liang.Evolution of fluid flow andpetroleum accumulation in overpressured systems in sedi-mentary basins[J].Advance in Earth Sciences,2001,16(1):79-85.
[4]张义纲,张抗,胡惕麟,等.天然气的生成聚集和保存[M].南京:河海大学出版社,1991.
[5]杨智,何生,何治亮,等.准噶尔盆地腹部超压层分布与油气成藏[J].石油学报,2008,29(2):199-205.YANG Zhi,HE Sheng,HE Zhi-liang,et al.Distributionof overpressure stratum and its relationship with hydrocar-bon accumulation in the central part of Junggar Basin[J].Acta Petrolei Sinica,2008,29(2):199-205.
[6]隋风贵.东营断陷盆地地层流体超压系统与油气运聚成藏[J].石油大学学报:自然科学版,2004,28(3):17-22.SUI Feng-gui.Effect of formation superpressure system onhydrocarbon migration and accumulation in Dongying faultbasin[J].Journal of the University of Petroleum,China(Edition of Natural Science),2004,28(3):17-22.
[7]刘震,许晓明,谢启超,等.渤海湾盆地异常高压晚期形成特征分析[J].现代地质,2006,20(2):259-267.LIU Zhen,XU Xiao-ming,XIE Qi-chao,et al.Analysison late origin of overpressure in Bohai Bay Basin[J].Ge-oscience,2006,20(2):259-267.
[8]陈中红,査明.东营凹陷烃源岩超压封存箱与油气聚集[J].沉积学报,2006,24(4):607-615.CHEN Zhong-hong,ZHA Ming.Over-pressured fluidcompartment and hydrocarbon migration and accumulationin Dongying depression[J].Acta Sedmentologica Sini-ca,2006,24(4):607-615.
[9]解习农,刘晓峰.超压盆地流体动力系统与油气运聚关系[J].矿物岩石地球化学通报,2000,19(2):103-108.XIE Xi-nong,LIU Xiao-feng.Related to black shale se-ries fluid dynamic system and relationship with accumula-tion of hydrocarbon in overpressured basin[J].Bulletinof Mineralogy,Petrology and Geochemisty,2000,19(2):103-108.
[10]刘晓峰,解习农.超压释放及其对油气运移和聚集的意义[J].地质科技情报,2001,20(4):51-56.LIU Xiao-feng,XIE Xi-nong.Overpressure relief andits implication to hydrocarbon migration and accumula-tion[J].Geological Science and Technology Informa-tion,2001,20(4):51-56.
[11]刘晓峰.超压传递:概念和方式[J].石油实验地质,2002,24(6):533-536.LIU Xiao-feng.Overpressure transference:concept andways[J].Petroleum Geology&Experiment,2002,24(6):533-536.
[12]王志战.沉积盆地异常压力体系及其预监测:以济阳坳陷为例[D].西安:西北大学地质学系,2006.WANG Zhi-zhan.Abnormal pressure regimes in sedi-mentary basins and their prediction and detection:a casein Jiyang Basin[D].Xian:Department of Geology inNorthwest University,2006.
[13]HERMANRUD C,WENSAAS L,TEIGE G M G,et al.Shale porosities from well logs on Haltenbanken(Off-shore Mid-Norway)show no influence of overpressureing[C]//LAW B E,ULMISHEK G F,SLAVIN V I.Ab-normal pressures in hydrocarbon environments.AAPGMemoir,1998,70:65-85.
[14]TEIGE G M G,HERMANRUD C,WENSAAS L.et al.The lack of relationship between overpressure and poros-ity in North Sea and Haltenbanken shales[J].Marineand Petroleum Geology,1999,16(4):321-335.
[15]何生,何治亮,杨智,等.准噶尔盆地腹部侏罗系超压特征和测井响应以及成因[J].地球科学——中国地质大学学报,2009,34(3):457-470.HE Sheng,HE Zhi-liang,YANG Zhi,et al.Character-istics,well-log responses and mechanisms of overpres-sures within the Jurassic formation in the central part ofJunggar Basin[J].Earth Science—Journal of China U-niversity of Geoscience,2009,34(3):457-470.
[16]杨姣,何生,王冰洁.东营凹陷牛庄洼陷超压特征及预测模型[J].地质科技情报,2009,28(4):34-40.YANG Jiao,HE Sheng,WANG Bing-jie.Characteris-tics and prediction model of overpressures in the Ni-uzhuang sag of Dongying depression[J].Geological Sci-ence and Technology Information,2009,28(4):34-40.
[17]张林晔,刘庆,张春荣.东营凹陷成烃与成藏关系研究[M].北京:地质出版社,2005.
[18]张善文,张林晔,张守春,等.东营凹陷古近系异常高压的形成与岩性油藏的含油性研究[J].科学通报,2009,54(11):1570-1578.ZHANG Shan-wen,ZHANG Lin-ye,ZHANG Shou-chun,et al.Formation of abnormal high pressure and itsapplication in the study of oil-bearing property of lithol-ogic hydrocarbon reservoirs in the Dongying sag[J].Chingese Sci Bull,2009,54(11):1570-1578.
[19]张守春.东营凹陷异常压力形成机制及其与成烃成藏的关系[D].青岛:中国石油大学地球科学与技术学院,2010.ZHANG Shou-chun.The relationship between the mech-anism of abnomal pressure formation and hydrocarbongeneration and entrapment in the Dongying depression[D].Qingdao:School of Geosciences in China Universi-ty of Petroleum,2010.
[20]郝芳.超压盆地生烃作用动力学与油气成藏机理[M].北京:科学出版社,2005.
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