胜坨地区沙三下亚段砂砾岩体沉积特征及沉积模式
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摘要
砂砾岩扇体是胜坨地区沙三下亚段最重要的沉积体系,形成于坡度陡、物源近、构造活动强烈的深湖环境。根据岩心观察并结合地震、测井等资料,识别出了近岸水下扇及与之相关的重力流水道和滑塌浊积扇沉积。近岸水下扇多夹于暗色泥岩之中,垂向上具有向上变细的正旋回特征,平面上主要分布于陈南断层东段下降盘,根部紧贴基岩断面。重力流水道岩性主要为暗色泥岩夹砾岩和砾状砂岩,反映了块体搬运的特征,垂向上缺乏浊积扇的扇相层序。滑塌浊积砂体具线状物源,缺乏主水道,岩性较细,部分砂层发育典型的鲍马层序。各沉积体系的形成受构造特征、古地貌和物源区性质等因素的影响,断裂活动十分活跃,是该区复合沉积体系形成的决定性因素。
The sand-conglomerate fans are the major depositional systems in the lower third member of Shahejie Formation in Shengtuo area,which formed in the deep lacustrine environment characterized by steep slope gradient,near sources and intensive tectonic activity.The near-shore subaqueous fans and its relative gravity channel and fluxoturbidite fan depositions were identified according to observation and description of cores combined with the numerous data of seismic and logging.The near-shore subaqueous fans mainly mingled within dark mudstones and located on the downcast side of the east Chennan fault in the horizontal direction.The grain size of the near-shore subaqueous fans became smaller from bottom to top in vertical direction.The bottom of those fans closely attached to the basement.The gravity channels and fluxoturbidite fans developed simultaneously.The gravity channels are the dark mudstones mingled with conglomerate and sandy conglomerate.The turbidity fan sequences are absent in the vertical direction.The fluxoturbidite fans have the linear provenance and fine grain size.The major channels are absent.The classic Bouma sequences developed in partial sandstones.The structural feature,palaeogeomorphology and provenance controlled the depositional system.The intense fault activity is the crucial factor for the formation of the complex depositional systems.
The sand-conglomerate fans are the major depositional systems in the lower third member of Shahejie Formation in Shengtuo area,which formed in the deep lacustrine environment characterized by steep slope gradient,near sources and intensive tectonic activity.The near-shore subaqueous fans and its relative gravity channel and fluxoturbidite fan depositions were identified according to observation and description of cores combined with the numerous data of seismic and logging.The near-shore subaqueous fans mainly mingled within dark mudstones and located on the downcast side of the east Chennan fault in the horizontal direction.The grain size of the near-shore subaqueous fans became smaller from bottom to top in vertical direction.The bottom of those fans closely attached to the basement.The gravity channels and fluxoturbidite fans developed simultaneously.The gravity channels are the dark mudstones mingled with conglomerate and sandy conglomerate.The turbidity fan sequences are absent in the vertical direction.The fluxoturbidite fans have the linear provenance and fine grain size.The major channels are absent.The classic Bouma sequences developed in partial sandstones.The structural feature,palaeogeomorphology and provenance controlled the depositional system.The intense fault activity is the crucial factor for the formation of the complex depositional systems.
引文
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[14]王建功,王天琦,梁苏娟,等.松辽盆地北部葡萄花油层事件沉积[J].石油学报,2005,26(6):20-24.Wang Jiangong,Wang Tianqi,Liang Sujuan,et al.Accident sedi-mentary of Putaohua Formation in the north of Songliao Basin[J].Acta Petrolei Sinica,2005,26(6):20-24.
[15]卓勤功.断陷盆地洼陷带岩性油气藏成藏机理及运聚模式[J].石油学报,2006,27(6):19-23.Zhuo Qingong.Reservoir-forming mechanism and migration-accumulation mode of lithological pool in deep sub-depression ofrift-subsidence basin[J].Acta Petrolei Sinica,2006,27(6):19-23.
[16]陈萍.泌阳凹陷陡坡带砂砾岩体预测[J].石油勘探与开发,2006,33(2):198-200.Chen Ping.Sand reservoir prediction of steep slope zone in Biy-ang Sag[J].Petroleum Exploration and Development,2006,33(2):198-200.
[17]孙连浦,刘招君,李本才,等.水下扇岩相特征及形成机制[J].世界地质,2001,20(3):249-256.Sun Lianpu,Liu Zhaojun,Li Bencai,et al.Submarine fans:Char-acteristics of rock facies and mechanisms of deposition[J].WorldGeology,2001,20(3):249-256.
[18]张荣红,余素玉,邬金华.陆相湖盆中沉积物供给因素对层序地层分析的影响[J].地球科学———中国地质大学学报,1997,22(2):139-144.Zhang Ronghong,Yu Suyu,Wu Jinhua.The effect of sedimentssupply condition on sequence stratigraphy analysis in continentallacustrine basins[J].Earth Science:Journal of China Universityof Geosciences,1997,22(2):139-144.
[2]王寿庆.扇三角洲模式[M].北京:石油工业出版社,1993.Wang Shouqing.Fan-delta model[M].Beijing:Petroleum Indus-try Press,1993.
[3]张金亮,沈凤.乌尔逊凹陷大磨拐河组近岸水下扇储层特征[J].石油学报,1991,12(3):25-35.Zhang Jinliang,Shen Feng.Characteristics of nearshore subaque-ous fan reservoir in Damoguaihe Formation,Wuerxun Depres-sion[J].Acta Petrolei Sinica,1991,12(3):25-35.
[4]Prabir D.Architecture and facies pattern of a sublacustrine fan,Jharia Basin,India[J].Sedimentary Geology,2002,148(3/4):373-387.
[5]何仕斌,张功成,米立军,等.南海北部大陆边缘盆地深水区储层类型及沉积演化[J].石油学报,2007,28(5):51-56.He Shibin,Zhang Gongcheng,Mi Lijun,et al.Reservoir type andsedimentary evolution in the continental margin deepwater areaof the northern South China Sea[J].Acta Petrolei Sinica,2007,28(5):51-56.
[6]吴崇筠,薛叔浩.中国含油气盆地沉积学[M].北京:石油工业出版社,1993:66-75.Wu Chongjun,Xue Shuhao.Sedimentology of oil and gas bearingbasin in China[M].Beijing:Petroleum Industry Press,1993:66-75.
[7]宋万超,孙焕泉,孙国,等.油藏开发流体动力地质作用———以胜坨油田二区为例[J].石油学报,2002,23(3):52-55.Song Wanchao,Sun Huanquan,Sun Guo,et al.Dynamical geo-logic process of development liquid:Taking Shengtuo Oilfield asan example[J].Acta Petrolei Sinica,2002,23(3):52-55.
[8]孙永壮.东营凹陷胜坨地区沙河街组沉积体系及其油气源特征[J].中国石油大学学报:自然科学版,2006,30(6):24-30.Sun Yongzhuang.Depositional system and its hydrocarbon char-acteristics of Shahejie group of Shengtuo region in Dongying de-pression[J].Journal of China University of Petroleum:NaturalScience Edition,2006,30(6):24-30.
[9]孔凡仙.东营凹陷北带砂砾岩扇体勘探技术与实践[J].石油学报,2000,21(5):27-31.Kong Fanxian.Exploration technique and practice of sandy con-glomeratic fans in the northern part of Dongying Depression[J].Acta Petrolei Sinica,2000,21(5):27-31.
[10]孔凡仙.东营凹陷北部陡坡带砂砾岩体的勘探[J].石油地球物理勘探,2000,35(5):669-676.Kong Fanxian.Prospecting for sand-gravel body in northernsteep slope of Dongying Depression[J].Oil Geophysical Prospec-ting,2000,35(5):669-676.
[11]宋鹍,吴胜和,朱文春,等.黄骅坳陷唐家河油田古近系沙河街组沙一段下部储层质量研究[J].古地理学报,2005,7(2):275-282.Song Kun,Wu Shenghe,Zhu Wenchun,et al.Reservoir quality ofthe lower part of Member1of Shahejie Formation of Paleogenein Tangjiahe Oilfield,Huanghua Depression[J].Journal of Palae-ogeography,2005,7(2):275-282.
[12]陈全红,李文厚,郭艳琴,等.鄂尔多斯盆地南部延长组浊积岩体系及油气勘探意义[J].地质学报,2006,80(5):656-663.Chen Quanhong,Li Wenhou,Guo Yanqin,et al.Turbidite sys-tems and the significance of petroleum exploration of YanchangFormation in the Southern Ordos Basin[J].Acta Geologica Sini-ca,2006,80(5):656-663.
[13]刘招君.湖泊水下扇沉积特征及影响因素———以伊通盆地莫里青断陷双阳组为例[J].沉积学报,2003,21(1):148-154.Liu Zhaojun.Lacus subaqueous fan sedimentary characteristicsand influence factors:A case study of Shuangyang Formation inMoliqing fault subsidence of Yitong Basin[J].Acta Sedimento-logica Sinica,2003,21(1):148-154.
[14]王建功,王天琦,梁苏娟,等.松辽盆地北部葡萄花油层事件沉积[J].石油学报,2005,26(6):20-24.Wang Jiangong,Wang Tianqi,Liang Sujuan,et al.Accident sedi-mentary of Putaohua Formation in the north of Songliao Basin[J].Acta Petrolei Sinica,2005,26(6):20-24.
[15]卓勤功.断陷盆地洼陷带岩性油气藏成藏机理及运聚模式[J].石油学报,2006,27(6):19-23.Zhuo Qingong.Reservoir-forming mechanism and migration-accumulation mode of lithological pool in deep sub-depression ofrift-subsidence basin[J].Acta Petrolei Sinica,2006,27(6):19-23.
[16]陈萍.泌阳凹陷陡坡带砂砾岩体预测[J].石油勘探与开发,2006,33(2):198-200.Chen Ping.Sand reservoir prediction of steep slope zone in Biy-ang Sag[J].Petroleum Exploration and Development,2006,33(2):198-200.
[17]孙连浦,刘招君,李本才,等.水下扇岩相特征及形成机制[J].世界地质,2001,20(3):249-256.Sun Lianpu,Liu Zhaojun,Li Bencai,et al.Submarine fans:Char-acteristics of rock facies and mechanisms of deposition[J].WorldGeology,2001,20(3):249-256.
[18]张荣红,余素玉,邬金华.陆相湖盆中沉积物供给因素对层序地层分析的影响[J].地球科学———中国地质大学学报,1997,22(2):139-144.Zhang Ronghong,Yu Suyu,Wu Jinhua.The effect of sedimentssupply condition on sequence stratigraphy analysis in continentallacustrine basins[J].Earth Science:Journal of China Universityof Geosciences,1997,22(2):139-144.
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