渤海湾盆地西部歧北凹陷东一段储层砂体的空间配置与成因解释
摘要
运用钻井和三维地震资料对歧北凹陷东一段储层砂体空间配置进行研究,结合岩心、录井、测井、三维地震、镜下微观特征和古生物组合等资料,对砂体成因进行解释。研究结果表明:该时期发育4个砂组,自下而上分别位于东一下段高位体系域的下部、东一下段高位体系域的上部、东一上段低位体系域和东一上段高位体系域;这4个砂组均为扇三角洲沉积体系,主要成因相为水下分流河道、河口坝和前缘泥,且Ed1x-HST(L)和Ed1s-LST砂组还发育水下重力流沉积;Ed1x-HST(L),Ed1x-HST(H)和Ed1s-LST砂组发育3条水下分流河道,而Ed1s-HST砂组仅发育2条水下分流河道;各砂组河口坝和前缘泥空间展布特征与水下分流河道的展布特征较相似,水下重力流沉积位于南大港断层下降盘区域;Ed1x-HST(L),Ed1x-HST(H)和Ed1s-HST砂组的水下分流河道砂体储集性最好,为该区域最主要的储集砂体。
The spatial combination of reservoir sandstone in the first member of the Dongying formation in the Qibei sag was depicted through the drilling data and three-dimensional seismic data.Based on the comprehensive information of well cores,drilling,logging,three-dimensional seismic,microscopic features and paleobiological association,the genesis of sandstone was analyzed.The results show that sandstone mainly develops four sand-groups,i.e.the lower of the highstand systems tract in the Ed1x,the upper of the highstand systems tract in the Ed1x,the low stand systems tract in the Ed1s,and the highstand systems tract in the Ed1s.The four sand-groups all develop into fan delta sedimentary system,which is mainly composed by subaqueous distributary channel,mouth bar and front mud,moreover,Ed1x-HST(L) and Ed1s-LST sand-groups have subaqueous gravity flow deposit.The Ed1x-HST(L),Ed1x-HST(H) and Ed1s-LST sand-groups develop three subaqueous distributary channels,while the Ed1s-HST sand-group develops only two subaqueous distributary channels,and the spatial combination of mouth bar and front mud are similar to those of subaqueous distributary channels.The subaqueous gravity flow deposit develops in the area of downthrow wall of the Nandagang fault.The subaqueous distributary channels sandstone of the Ed1x-HST(L),Ed1x-HST(H)and Ed1s-HST sand-groups are the best reservoir sandstone.
The spatial combination of reservoir sandstone in the first member of the Dongying formation in the Qibei sag was depicted through the drilling data and three-dimensional seismic data.Based on the comprehensive information of well cores,drilling,logging,three-dimensional seismic,microscopic features and paleobiological association,the genesis of sandstone was analyzed.The results show that sandstone mainly develops four sand-groups,i.e.the lower of the highstand systems tract in the Ed1x,the upper of the highstand systems tract in the Ed1x,the low stand systems tract in the Ed1s,and the highstand systems tract in the Ed1s.The four sand-groups all develop into fan delta sedimentary system,which is mainly composed by subaqueous distributary channel,mouth bar and front mud,moreover,Ed1x-HST(L) and Ed1s-LST sand-groups have subaqueous gravity flow deposit.The Ed1x-HST(L),Ed1x-HST(H) and Ed1s-LST sand-groups develop three subaqueous distributary channels,while the Ed1s-HST sand-group develops only two subaqueous distributary channels,and the spatial combination of mouth bar and front mud are similar to those of subaqueous distributary channels.The subaqueous gravity flow deposit develops in the area of downthrow wall of the Nandagang fault.The subaqueous distributary channels sandstone of the Ed1x-HST(L),Ed1x-HST(H)and Ed1s-HST sand-groups are the best reservoir sandstone.
引文
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[3]陈纯芳,赵澄林,李会军.板桥和歧北凹陷沙河街组深层碎屑岩储层物性特征及其影响因素[J].石油大学学报:自然科学版,2002,26(1):4-7.CHEN Chun-fang,ZHAO Cheng-lin,LI Hui-jun.Physical properties of reservoir and influencing factors of deep burial clastic rocks in Banqiao-Qibei sag[J].Journal of the University of Petroleum,China:Edition of Natural Science,2002,26(1):4-7.
[4]DING Wei-wei,DAI Jin-xing,CHU Feng-you,et al.Geochemical characteristics of the fluid inclusions in the Gangxi fault belt,Huanghua depression,Bohai Bay Basin,China[J].Journal of Zhejiang University:Science A,2007,8(7):1011-1020.
[5]JIN Zhen-kui,LIU Chun-hui.Quantitative study on reservoir diagenesis in northern Dagang structural belt,Huanghua depression[J].Petroleum Exploration and Development,2008,35(5):581-587.
[6]黄传炎,王华,周立宏,等.黄骅坳陷涧南潜山构造演化对层序样式的控制[J].中南大学学报:自然科学版,2010,41(2):692-699.HUANG Chuan-yan,WANG Hua,ZHOU Li-hong,et al.Sequence pattern controlled by structural evolution of Jiannan buried-hill in Huanghua depression[J].Journal of Central South University:Science and Technology,2010,41(2):692-699.
[7]鲁超,焦养泉,吴立群,等.渤海湾盆地歧北凹陷古近系沙二段复合三角洲内部结构及空间演化[J].现代地质,2010,24(2):311-320.LU Chao,JIAO Yang-quan,WU Li-qun,et al.Inner structure and spatial evolution of complex delta of the second member of Shahejie formation of paleogene in Qibei sag,Bohai bay basin[J].Geoscience,2010,24(2):311-320.
[8]QU Fang,CHEN Qing-hua,LIAN Cheng-bo,et al.Distribution and accumulation of oil and gas in southern Huanghua depression[J].Petroleum Exploration and Development,2008,35(3):294-300.
[9]SU Ni-na,JIN Zhen-kui,SONG Fan.Distribution and genesis of secondary pores in paleogene clastic reservoirs of Beidagang structural belt in the Huanghua depression[J].Mining Science and Technology,2010,20(1):115-120.
[10]严德天,王华,肖敦清,等.黄骅坳陷中部沙三段沉积体系分析[J].石油勘探与开发,2007,34(3):328-334.YAN De-tian,WANG Hua,XIAO Dun-qing,et al.Sedimentary systems of the third member of Shahejie formation,central Huanghua depression[J].Petroleum Exploration and Development,2007,34(3):328-334.
[11]白云风,张兵,王华,等.黄骅坳陷古近纪东营组物源方向研究[J].石油天然气学报,2006,28(3):17-19.BAI Yun-feng,ZHANG Bin,WANG Hua,et al.Research on the source direction of palaeogene Dongying formation in Huanghua depression[J].Journal of Oil and Gas Technology,2006,28(3):17-19.
[12]WANG Hua,HUANG Chuan-yan,ZHAO Shu-e,et al.Paleogeomorphy,provenance system and sedimentary system of the Dongying formation in the Qikou sag[J].Mining Science and Technology,2009,19:800-806.
[13]王华,廖远涛,陆永潮,等.中国东部新生代陆相断陷盆地层序的构成样式[J].中南大学学报:自然科学版,2010,41(1):277-285.WANG Hua,LIAO Yuan-tao,LU Yong-chao,et al.Sequence architecture styles of Cenozoic continental rift basins in east China[J].Journal of Central South University:Science and Technology,2010,41(1):277-285.
[14]林畅松.沉积盆地的构造地层分析—以中国构造活动盆地研究为例[J].现代地质,2006,20(2):185-194.LIN Chang-song.Tectono-stratigraphic analysis of sedimentary basins:A case study on the inland tectonically active basins in China[J].Geoscience,2006,20(2):185-194.
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[16]焦养泉,陈安平,王敏芳,等.鄂尔多斯盆地东北部直罗组底部砂体成因分析—砂岩型铀矿床预测的空间定位基础[J].沉积学报,2005,23(3):371-379.JIAO Yang-quan,CHEN An-ping,WANG Min-fang,et al.Genetic analysis of the bottom sandstone of Zhiluo formation,northeastern Ordos basin:Predictive base of spatial orientation of sandstone-type uranium deposit[J].Acta Sedimentologica Sinica,2005,23(3):371-379.
[17]焦养泉,李思田,杨士恭,等.湖泊三角洲前缘砂体内部构成及不均一性露头研究[J].地球科学:中国地质大学学报,1993,18(4):441-452.JIAO Yang-quan,LI Si-tian,YANG Shi-gong,et al.An outcrop study on internal architecture and heterogeneity of lacustrine delta front sand bodies[J].Earth Science Journal of China University of Geosciences,1993,18(4):441-452.
[18]焦养泉,吴立群,杨生科,等.铀储层沉积学-砂岩型铀矿勘查与开发的基础[M].北京:地质出版社,2006:6-9.JIAO Yang-quan,WU Li-qun,YANG Sheng-ke,et al.Sedimentary of uranium reservoir-the exploration and production base of sandstone-type uranium deposits[M].Beijing:Geological Press,2006:6-9.
[19]YU Xing-he,LI Sheng-li,ZHAO Shu,et al.Constraining method of stochastic modeling for fluvial petroleum reservoir controlled by depositional facies using wells and seismic data[J].Earth Science Frontiers,2008,15(4):33-41.
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