东营凹陷王家岗构造带孔店组构造特征及其控藏作用
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摘要
针对东营凹陷王家岗构造带孔店组构造特征复杂、构造演化过程不明确等问题,利用地震、测井、录井、岩心等资料,运用断层玫瑰花图、平衡剖面法、断层封闭性分析法等技术手段,解析了王家岗构造带孔店组构造特征及其形成演化规律,揭示了其对油气成藏的控制作用。结果表明:断层主要形成于孔店组沉积时期,由于形成机制的分异性,不同走向断层活动期次具有较大差异。断层平面表现为梳状、平行式、雁列式组合型式,剖面发育阶梯状、"Y"字型、"屋脊"式组合类型。受控于郯庐断裂带和基底走滑断层形成的褶皱带经历"形成期—加剧期—定型期"3个阶段,被早期或同期断层切割,呈现多个断鼻"串珠状"分布的特点。该构造带对油气成藏具有重要的控制作用,是油气运聚最有利指向区,轴部储层物性好于两翼,断层封闭与输导性能是油气运移和聚集的关键因素,断层长度、褶皱带宽度以及储层物性决定了油气平面分布范围,断层构造样式和褶皱带幅度共同控制了油气空间分布规律。
The Kongdian Formation in Wangjiagang structural zone in Dongying depression is complex in structural characteristics,and its tectonic evolution process is still poorly understood.To solve these problems,various data including seismic,logging and core were integrated to analyze the structural characteristics of Kongdian Formation,summarize its regularity of formation and evolution,and reveal the control effect on hydrocarbon accumulation with rose diagram of faults,balanced cross section and fault-sealing analysis methods.The following results were obtained.Most faults were formed in the DongyingKongdian period.Owing to the differences of formation mechanisms,faults with different trends are different in timing and configurations.On plane view,the faults show configurations such as comb-like,parallel or echelon.While on sectional view,they show configurations such as step,"Y" shape or roof-like.Folded belts which were controlled by Tan-Lu fault zone and basement strike slip fault system have undergone three evolutionary stages including formation stage,intensification stage and finalization stage.During this period,the folded belts were cut by earlier or growth faults,resulting in moniliform fault-nose distribution.The structural zone controlled hydrocarbon pooling.It is the most favorable destination of hydrocarbon migration and has better physical properties of reservoir in the axial region than those in two wings.Fault sealing and carrier beds are the key factors controlling hydrocarbon migration and accumulation.The length of fault,the width of folded zone and reservoir physical property determine the plane distribution area of oil/gas,while the fault configuration and amplitude of fold zone jointly control the spatial distribution of oil/gas.
The Kongdian Formation in Wangjiagang structural zone in Dongying depression is complex in structural characteristics,and its tectonic evolution process is still poorly understood.To solve these problems,various data including seismic,logging and core were integrated to analyze the structural characteristics of Kongdian Formation,summarize its regularity of formation and evolution,and reveal the control effect on hydrocarbon accumulation with rose diagram of faults,balanced cross section and fault-sealing analysis methods.The following results were obtained.Most faults were formed in the DongyingKongdian period.Owing to the differences of formation mechanisms,faults with different trends are different in timing and configurations.On plane view,the faults show configurations such as comb-like,parallel or echelon.While on sectional view,they show configurations such as step,"Y" shape or roof-like.Folded belts which were controlled by Tan-Lu fault zone and basement strike slip fault system have undergone three evolutionary stages including formation stage,intensification stage and finalization stage.During this period,the folded belts were cut by earlier or growth faults,resulting in moniliform fault-nose distribution.The structural zone controlled hydrocarbon pooling.It is the most favorable destination of hydrocarbon migration and has better physical properties of reservoir in the axial region than those in two wings.Fault sealing and carrier beds are the key factors controlling hydrocarbon migration and accumulation.The length of fault,the width of folded zone and reservoir physical property determine the plane distribution area of oil/gas,while the fault configuration and amplitude of fold zone jointly control the spatial distribution of oil/gas.
引文
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[13]王冠民,庞小军,张雪芳,等.渤中凹陷古近系石南断层活动性及其对油气成藏条件的控制作用[J].石油与天然气地质,2012,33(6):859-866.Wang Guanmin,Pang Xiaojun,Zhang Xuefang,et al.Activity of Shi-nan fault and its control on hydrocarbon accumulation in the Paleo-gene in Bozhong Depression[J].Oil&Gas Geology,2012,33(6):859-866.
[14]童亨茂.断层开启与封闭的定量分析[J].石油与天然气地质,1998,24(5):451-455.Tong Hengmao.Quantitative analysis of fault opening and sealing[J].Oil&Gas Geology,1998,24(5):451-455.
[15]张春林,高先志,李潍莲,等.柴达木盆地奈斯断陷盆地断层封闭性及其对油气运聚的作用[J].石油与天然气地质,2004,25(6):659-665.Zhang Chunlin,Gao Xianzhi,Li Weilian,et al.Sealing capacity offaults and its control on hydrocarbon migration and accumulation inGas fault depression in Qaidam basin[J].Oil&Gas Geology,2004,25(6):659-665.
[16]Knipe R J.Faulting process and fault seal[J].Norwegian PetroleumSociety Special Publication,1992,1(3):325-342.
[17]李明义,岳湘安,江青春,等.海拉尔-塔木察格盆地中部断陷输导体系类型及其控藏作用[J].石油与天然气地质,2012,33(3):407-416.Li Mingyi,Yue Xiang’an,Jiang Qingchun,et al.Migration systemtypes and their control on hydrocarbon accumulation in central faultdepressions of Hailar-Tamtsag Basin[J].Oil&Gas Geology,2012,33(3):407-416.
[18]范柏江,刘成林,庞雄奇,等.渤海湾盆地南堡凹陷断裂系统对油气成藏的控制作用[J].石油与天然气地质,2011,32(2):192-198.Fan Bojiang,Liu Chenglin,Pang Xiongqi,et al.Control of fault sys-tem on hydrocarbon accumulation in Nanpu Sag,the Bohai Bay Basin[J].Oil&Gas Geology,2011,32(2):192-198.
[2]倪金龙,吕宝凤,夏斌.渤海湾盆地八面河缓坡带断裂系统及其对孔店组油气成藏的影响[J].天然气地球科学,2006,17(3):370-374.Ni Jinlong,LüBaofeng,Xia Bin.Fault system of gentle slope belt andits affect on the form of oil-gas reservoirs of Kongdian set in Bamian-he Ramp of Dongying depression,Eastern China[J].Natural GasGeoscinence,2006,17(3):370-374.
[3]徐义卫.济阳坳陷八面河地区古近系孔店组油气成藏特征[J].石油与天然气地质,2011,31(3):352-359.Xu Yiwei.Characteristics of hydrocarbon accumulation in the Paleo-gene Kongdian Formation of Bamianhe area,the Jiyang Depression[J].Oil&Gas Geology,2011,31(3):352-359.
[4]张升平,吕宝凤,夏斌,等.东营凹陷新生代构造转型及其控油意义[J].大地构造与成矿学,2007,31(3):281-287.Zhang Shengping,LüBaofeng,Xia Bin,et al.The Cenozoic structuraltransition and its significance for petroleum accumulation in Dongyingsag,Shandong[J].Geotectonica et Metalbgenia,2007,31(3):281-287.
[5]陈布科,刘家铎,杜贤樾.陈王断裂带的形成机制与油气勘探[J].天然气工业,1997,17(1):23-26.Chen Buke,Liu Jiaduo,Du Xianyue,et al.Formation mechanism andoil-gas exploration of Chen-Wang fault zones[J].Natural Gas Indus-try,1997,17(1):23-26.
[6]万桂梅,周东红,汤良杰.渤海海域郯庐断裂带对油气成藏的控制作用[J].石油与天然气地质,2009,28(4):1-10.Wan Guimei,Zhou Donghong,Tang Liangjie.Control of the Tan-Luzone on hydrocarbon accumulation in Bohai Sea waters[J].Oil&Gas geology,2009,28(4):1-10.
[7]刘顺,沈忠民,司建涛.郯庐断裂带演化动力学——多力源多时期分段作用模式[J].成都理工大学学报(自然科学版),2006,33(5):473-477.Liu Shun,Shen Zhongmin,Si Jiantao.Dynamics of the evolution ofthe Tanlu fault zone:a multiforce-in-multiphase acting model[J].Journal of Chengdu University of Technology(Science and Technolo-gy Edition),2006,33(5):473-477.
[8]韩登林,李忠,寿建峰.背斜构造不同部位储集层物性差异:以库车坳陷克拉2气田为例[J].石油勘探与开发,2011,38(3):282-286.Han Denglin,Li Zhong,Shou Jianfeng.Reservoir property differencebetween structural positions in the anticline:a case study from Kela-2gas field in the Kuqa Depression,Tarim Basin,NW China[J].Petro-leum Exploration and Development,2011,38(3):282-286.
[9]张凤奇,王震亮,范昌育,等.库车坳陷构造挤压对流体动力的影响[J].石油与天然气地质,2012,33(2):208-216.Zhang Fengqi,Wang Zhenliang,Fan Changyu,et al.Effects of tecto-nic compression on hydrodynamic force in Kuqa Depression[J].Oil&Gas Geology,2012,33(2):208-216.
[10]Worden R H,Mayall M,Evans I J.The effect of ductile-lithic sandgrains and quartz cement on porosity and permeability in Oligoceneand Lower Miocene clastics,South China Sea:prediction of reservoirquality[J].AAPG Bulletin,2000,84:345-359.
[11]张琴,朱筱敏.山东省东营凹陷古近系沙河街组碎屑岩储层定量评价及油气意义[J].古地理学报,2008,10(5):465-472.Zhang Qin,Zhu Xiaomin.Quantitative assessment of clastic reservoirof the Paleogene Shahejie Formation in Dongying Sag of ShandongProvince and its hydrocarbon significance[J].Journal of Palaeogeog-raphy,2008,10(5):465-472.
[12]时丕同,王秀红,陈涛.泥岩涂抹长度定量计算及应用[J].中国石油大学学报,2009,26(1):60-65.Shi Pitong,Wang Xiuhong,Chen Tao.Quantitative calculation andapplication of shale smear length[J].Journal of China University ofPetroleum(Edition of Natural Science),2009,26(1):60-65.
[13]王冠民,庞小军,张雪芳,等.渤中凹陷古近系石南断层活动性及其对油气成藏条件的控制作用[J].石油与天然气地质,2012,33(6):859-866.Wang Guanmin,Pang Xiaojun,Zhang Xuefang,et al.Activity of Shi-nan fault and its control on hydrocarbon accumulation in the Paleo-gene in Bozhong Depression[J].Oil&Gas Geology,2012,33(6):859-866.
[14]童亨茂.断层开启与封闭的定量分析[J].石油与天然气地质,1998,24(5):451-455.Tong Hengmao.Quantitative analysis of fault opening and sealing[J].Oil&Gas Geology,1998,24(5):451-455.
[15]张春林,高先志,李潍莲,等.柴达木盆地奈斯断陷盆地断层封闭性及其对油气运聚的作用[J].石油与天然气地质,2004,25(6):659-665.Zhang Chunlin,Gao Xianzhi,Li Weilian,et al.Sealing capacity offaults and its control on hydrocarbon migration and accumulation inGas fault depression in Qaidam basin[J].Oil&Gas Geology,2004,25(6):659-665.
[16]Knipe R J.Faulting process and fault seal[J].Norwegian PetroleumSociety Special Publication,1992,1(3):325-342.
[17]李明义,岳湘安,江青春,等.海拉尔-塔木察格盆地中部断陷输导体系类型及其控藏作用[J].石油与天然气地质,2012,33(3):407-416.Li Mingyi,Yue Xiang’an,Jiang Qingchun,et al.Migration systemtypes and their control on hydrocarbon accumulation in central faultdepressions of Hailar-Tamtsag Basin[J].Oil&Gas Geology,2012,33(3):407-416.
[18]范柏江,刘成林,庞雄奇,等.渤海湾盆地南堡凹陷断裂系统对油气成藏的控制作用[J].石油与天然气地质,2011,32(2):192-198.Fan Bojiang,Liu Chenglin,Pang Xiongqi,et al.Control of fault sys-tem on hydrocarbon accumulation in Nanpu Sag,the Bohai Bay Basin[J].Oil&Gas Geology,2011,32(2):192-198.
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