歧口凹陷中部古近系沙三一亚段水下扇沉积体系内部构成分析
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摘要
歧口凹陷中部古近系沙三一亚段是重要的含油层段,其内部发育水下扇沉积体系。本文通过岩心、测井、地震资料及室内分析测试等手段,对研究区水下扇沉积体系进行了精细解剖。研究发现其内部可识别出扇面水道、非限制性朵叶体和开阔湖泊三种成因相组合,其中扇面水道由主干扇面水道和分支扇面水道两种成因相构成,非限制性朵叶体由近端朵叶体和远端朵叶体两种成因相构成。主干扇面水道切割近端朵叶体,将沉积物向盆地内部输送,在坡折带其所携带的沉积物可能在重力作用下发生再次分配,形成新的扇面水道和非限制性朵叶体;分支扇面水道多发育于远端朵叶体上部,被开阔湖泊泥岩所包围。在区域背景及生物相资料分析基础上,指出沙三一亚段歧口凹陷中部处于断陷盆地的裂陷幕,在构造坡折带或陡坡带,由于断层活动等因素影响,在半深湖-深湖背景下形成水下扇沉积体系。歧口凹陷沙三一亚段水下扇沉积体系的研究对于该区有利储集体预测具有重要指导意义。
The subaqueous fan depositional system developed in the first sub-member of the Paleogenic Sha3 member is an important oil-bearing reservoir in the center of the Qikou sag.Based on integrated well core,drilling,seismic,and lab analysis,three types of genetic facies associations were identified in the subaqueous fan depositional systems,i.e.,feeder channel,unconfined lobe,and lake deposit.The feeder channels were formed with two types of genetic facies,i.e.,main feeder channel,distributary feeder channel.The unconfined lobes compose of two types of genetic facies,i.e.,proximal lobes and distal lobes.The sediments were transported to the basin through the main feeder channels that cut the proximal lobes,and might have been distributed by the gravity in the slope-break zone and formed new feeder channels and unconfined lobes.Distributary feeder channels usually developed in the upper part of the distal lobes and surrounded by mudstone in the open lake.Analysis of the regional background and biological data show that the central part of the Qikou sag was in chasmic stage when it received the first sub-member of Paleogene Sha3 member sediments.The fault activity in the slope-break zone resulted in subaqueous fan depositional systems developed in the semi-deep lake.
The subaqueous fan depositional system developed in the first sub-member of the Paleogenic Sha3 member is an important oil-bearing reservoir in the center of the Qikou sag.Based on integrated well core,drilling,seismic,and lab analysis,three types of genetic facies associations were identified in the subaqueous fan depositional systems,i.e.,feeder channel,unconfined lobe,and lake deposit.The feeder channels were formed with two types of genetic facies,i.e.,main feeder channel,distributary feeder channel.The unconfined lobes compose of two types of genetic facies,i.e.,proximal lobes and distal lobes.The sediments were transported to the basin through the main feeder channels that cut the proximal lobes,and might have been distributed by the gravity in the slope-break zone and formed new feeder channels and unconfined lobes.Distributary feeder channels usually developed in the upper part of the distal lobes and surrounded by mudstone in the open lake.Analysis of the regional background and biological data show that the central part of the Qikou sag was in chasmic stage when it received the first sub-member of Paleogene Sha3 member sediments.The fault activity in the slope-break zone resulted in subaqueous fan depositional systems developed in the semi-deep lake.
引文
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陈守建,李荣社,计文化,赵振明,孟勇,史秉德.2007.昆仑造山带晚泥盆世沉积特征及构造古地理环境.大地构造与成矿学,31(1):44-51.
陈仲勤.1985.黄骅坳陷早第三纪沙河街组三段沉积环境分析.海洋地质与第四纪地质,5(2):37-50.
程立华,吴胜和,宋春刚,闫海军.2008.黄骅坳陷马东地区古近系重力流水道相储层特征研究.西安石油大学学报(自然科学版),23(6):33-41.
侯艳平,朱德丰,任延广,庄新国.2008.贝尔凹陷构造演化及其对沉积和油气的控制作用.大地构造与成矿学,32(3):300-307.
金振奎,邹元荣,张响响,蒋春雷.2002.黄骅坳陷古近系沙河街组湖泊碳酸盐沉积相.古地理学报,4(3):1118.
赖婉琦,顾家裕.1984.渤海湾含油气盆地中的浊积岩.沉积学报,2(4):47-56.
李廷辉,梁惠兰,胡永军,常德双,孔凡东,姚以泰,赵春段.2005.关家堡滩海区近岸水下扇体研究及勘探意义,40(5):561-564.
孙永传.1980.水下冲积扇——一个找油的新领域.石油实验地质,2(3):32-41.
王华,白云风,黄传炎,严德天,刘彦博,陈思,向雪梅,廖计华,夏存银,赵淑娥.2009.歧口凹陷古近纪东营期古物源体系重建与应用.地球科学——中国地质大学学报,34(3):448-456.
吴小红,吕修祥,加东辉,滕玉波,赖维成.2009.辽中凹陷东营组重力流发育机制及沉积构成.西南石油大学学报(自然科学版),31(4):18-23.
徐振中,陈世悦,姚军,王永诗.2008.济阳坳陷中生代构造活动与沉积作用的时空关系.大地构造与成矿学,32(3):317-325.
严德天,王华,王家豪,王清晨.2008.黄骅坳陷沙河街组层序地层样式及隐蔽圈闭预测.中国矿业大学学报,37(1):30-37.
严德天,王华,肖敦清,王家豪,廖远涛.2007.黄骅坳陷中部沙三段沉积体系分析.石油勘探与开发,34(3):328334.
张服民,简宗渝.1981.黄骤盆地早第三纪沉积史与环境特征.石油与天然气地质,2(2):141-156.
张萌,田景春.1999,近岸水下扇的命名、特征及其储集性.岩相古地理,19(4):42-52.
Catuneanu O,Hancox P J,Cairncross B and Rubidge B S.2002.Foredeep submarine fans and forebulge deltas:Orogenic off-loading in the underfilled Karoo Basin.Journal ofAfrican Earth Sciences,35(4):489-502.
Galloway W E.1998.Siliciclastic slope and base of slope depositional systems:Component facies,stratigraphic architecture and classification.AAPG Bulletin,82(4):569-595.
Richard M and Bowman M.1998.Submarine fans and relateddepositional:Variability in reservoir architecture and wireline log character.Marine and Petroleum Geology,15:821-839.
陈守建,李荣社,计文化,赵振明,孟勇,史秉德.2007.昆仑造山带晚泥盆世沉积特征及构造古地理环境.大地构造与成矿学,31(1):44-51.
陈仲勤.1985.黄骅坳陷早第三纪沙河街组三段沉积环境分析.海洋地质与第四纪地质,5(2):37-50.
程立华,吴胜和,宋春刚,闫海军.2008.黄骅坳陷马东地区古近系重力流水道相储层特征研究.西安石油大学学报(自然科学版),23(6):33-41.
侯艳平,朱德丰,任延广,庄新国.2008.贝尔凹陷构造演化及其对沉积和油气的控制作用.大地构造与成矿学,32(3):300-307.
金振奎,邹元荣,张响响,蒋春雷.2002.黄骅坳陷古近系沙河街组湖泊碳酸盐沉积相.古地理学报,4(3):1118.
赖婉琦,顾家裕.1984.渤海湾含油气盆地中的浊积岩.沉积学报,2(4):47-56.
李廷辉,梁惠兰,胡永军,常德双,孔凡东,姚以泰,赵春段.2005.关家堡滩海区近岸水下扇体研究及勘探意义,40(5):561-564.
孙永传.1980.水下冲积扇——一个找油的新领域.石油实验地质,2(3):32-41.
王华,白云风,黄传炎,严德天,刘彦博,陈思,向雪梅,廖计华,夏存银,赵淑娥.2009.歧口凹陷古近纪东营期古物源体系重建与应用.地球科学——中国地质大学学报,34(3):448-456.
吴小红,吕修祥,加东辉,滕玉波,赖维成.2009.辽中凹陷东营组重力流发育机制及沉积构成.西南石油大学学报(自然科学版),31(4):18-23.
徐振中,陈世悦,姚军,王永诗.2008.济阳坳陷中生代构造活动与沉积作用的时空关系.大地构造与成矿学,32(3):317-325.
严德天,王华,王家豪,王清晨.2008.黄骅坳陷沙河街组层序地层样式及隐蔽圈闭预测.中国矿业大学学报,37(1):30-37.
严德天,王华,肖敦清,王家豪,廖远涛.2007.黄骅坳陷中部沙三段沉积体系分析.石油勘探与开发,34(3):328334.
张服民,简宗渝.1981.黄骤盆地早第三纪沉积史与环境特征.石油与天然气地质,2(2):141-156.
张萌,田景春.1999,近岸水下扇的命名、特征及其储集性.岩相古地理,19(4):42-52.
Catuneanu O,Hancox P J,Cairncross B and Rubidge B S.2002.Foredeep submarine fans and forebulge deltas:Orogenic off-loading in the underfilled Karoo Basin.Journal ofAfrican Earth Sciences,35(4):489-502.
Galloway W E.1998.Siliciclastic slope and base of slope depositional systems:Component facies,stratigraphic architecture and classification.AAPG Bulletin,82(4):569-595.
Richard M and Bowman M.1998.Submarine fans and relateddepositional:Variability in reservoir architecture and wireline log character.Marine and Petroleum Geology,15:821-839.
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