桂中地区下石炭统寺门组物源特征与岩相古地理分析
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摘要
在主力勘探领域未明确的背景下,探讨桂中地区下石炭统寺门组砂岩储层物源特征,结合野外剖面和钻井薄片、砂地比和砂砾岩厚度分布、重矿物组合、古流向、地震相等资料,研究桂中地区下石炭统寺门组物源体系及沉积相展布规律。结果表明:桂中地区寺门组可分为3个物源组合区,Ⅰ区主要位于桂中西北部的南丹、环江地区;Ⅱ区主要位于桂中东部柳城、鹿寨地区;Ⅲ区为Ⅰ、Ⅱ区的混源区。母岩主要来源于北部雪峰古陆与东部云开古陆,靠近古陆发育三角洲相沉积,前缘受古地貌、潮汐及波浪影响,形成砂坝或滩。该结果为桂中地区油气勘探评价提供指导。
Guizhong depression,large scale late Paleozoic marine residual basin that formed basically in the stable craton of late Paleozoic to Mesozoic,indicates excellent oil and gas accumulation and exploration potential.Several exploration drilling operations reveal that the generation of the sand reservoir has well matched with the source rock and was covered by finely tight layers in Simen formation in the lower Carboniferous in host area.There are several major discoveries in this type of clastic reservoir in the lower Carboniferous in China,such as Tarim and Ordos basin.In the background of unclear exploration area,the study on this new type of reservoir with great potential is significant strategic.Based on research of the regional geology and analysis of geological and geophysics materials,it worked out that there were 3sources zones,zoneⅠ was mainly located in Nandan and Huanjiang areas in the northwest of Guizhong,zoneⅡ was mainly located in Liucheng and Luzhai areas in the eastern part of Guizhong,and zoneⅢ was the mixed source area.In addition,the mother rock of sandrock came from the Xuefeng landmass in north and the Yunkai landmass in east.There were delta facies near landmass and sand dam distributed in the leading edge area that influenced by ancient landforms,tides and waves.The research results provide guidance for oil and gas exploration evaluation in host area.
Guizhong depression,large scale late Paleozoic marine residual basin that formed basically in the stable craton of late Paleozoic to Mesozoic,indicates excellent oil and gas accumulation and exploration potential.Several exploration drilling operations reveal that the generation of the sand reservoir has well matched with the source rock and was covered by finely tight layers in Simen formation in the lower Carboniferous in host area.There are several major discoveries in this type of clastic reservoir in the lower Carboniferous in China,such as Tarim and Ordos basin.In the background of unclear exploration area,the study on this new type of reservoir with great potential is significant strategic.Based on research of the regional geology and analysis of geological and geophysics materials,it worked out that there were 3sources zones,zoneⅠ was mainly located in Nandan and Huanjiang areas in the northwest of Guizhong,zoneⅡ was mainly located in Liucheng and Luzhai areas in the eastern part of Guizhong,and zoneⅢ was the mixed source area.In addition,the mother rock of sandrock came from the Xuefeng landmass in north and the Yunkai landmass in east.There were delta facies near landmass and sand dam distributed in the leading edge area that influenced by ancient landforms,tides and waves.The research results provide guidance for oil and gas exploration evaluation in host area.
引文
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[15]吴国干,姚根顺,徐政语,等.桂中坳陷改造期构造样式及其成因[J].海相油气地质,2009,14(1):33-41.Wu Guogan,Yao Gengshun,Xu Zhengyu,et al.Structural patterns and origin of tectonic reformation in Guizhong depression[J].Marine Origin Petroleum Geology,2009,14(1):33-41.
[16]陈子炓,姚根顺,楼章华,等.桂中坳陷及周缘油气保存条件分析[J].中国矿业大学学报,2011,40(1):80-88.Chen Ziliao,Yao Genshun,Lou Zhanghua,et al.Study of hydrocarbon preservation condition in Guizhong depression and the margin[J].Journal of China University of Mining&Technology,2011,40(1):80-88.
[17]叶晓斌.黔南-桂中坳陷油气保存条件分析[J].南方油气,2005,18(1):16-20.Ye Xiaobin.Study on hydrocarbon preservation conditions in Qiannan-Guizhong depression[J].Southern China Oil&Gas,2005,18(1):16-20.
[18]刘东成.桂中坳陷构造演化及油气保存条件分析[D].北京:中国石油大学(北京),2009.Liu Dongcheng.The analysis of tectonic evolution and preservation condition of oil and gas in Guizhong depression[D].Beijing:China University of Petroleum(Beijing),2009.
[19]白忠峰.桂中坳陷构造特征及其与油气关系[D].北京:中国地质大学(北京),2006.Bai Zhongfeng.Structural characteristics and the relation with the Petruleum and gas in Guizhong depression[D].Beijing:China U-niversity of Geosicences(Beijing),2006.
[20]胡东风,李宇平,段金宝,等.桂中地区泥盆纪碳酸盐岩沉积特征与孤立台地礁滩演化[J].岩石学报,2017,33(4):1135-1147.Hu Dongfeng,Li Yuping,Duan Jinbao,et al.Sedimentary features of carbonates and evolution of isolated platforms in Devonian in Guizhong area[J].Acta Petrologica Sinica,2017,33(4):1135-1147.
[21]张矿明,范志伟,罗彦萍,等.桂中坳陷泥盆纪层序岩相古地理与孤立丘台礁滩发育特征[J].沉积学报,2017,35(1):102-116.Zhang Kuangming,Fan Zhiwei,Luo Yanping,et al.Sequence litho-paleogeography and ccharacteristics of Devonian isolated reef in Guizhong depression[J].Acta Sedimentologica Sinica,2017,35(1):102-116.
[22]Galloway W E.Genetic Stratigraphic sequence in basin analysis I:Architecture and genesis of flooding-surface bounded depositional units[J].AAPG Bulletin,1989,17(6):29-34.
[23]刘磊,朱博华,刘显太,等.中国滩坝砂勘探现状与储层基本特征分析[J].特种油气藏,2013,20(5):14-19.Liu Lei,Zhu Bohua,Liu Xiantai,et al.Exploration status and basic characteristics of beach-bar sand reservoirs in China[J].Special Oil&Gas Reservoirs,2013,20(5):14-19.
[2]李亚龙,于兴河,单新,等.鄂尔多斯盆地东南部下石盒子组盒8段物源特征与沉积相[J].东北石油大学学报,2016,40(3):51-60.Li Yalong,Yu Xinghe,Shan Xin,et al.Provenance and sedimentary facies of He8member of Xiashihezi formation in southeastern Ordos basin[J].Journal of Northeast Petroleum University,2016,40(3):51-60.
[3]刘璇,丁晓琪,万友利,等.鄂尔多斯盆地长9段沉积物源分析[J].东北石油大学学报,2014,38(1):10-16.Liu Xuan,Ding Xiaoqi,Wan Youli,et al.Sedimentary source study of Chang 9interval of Yanchang formation,Ordos basin[J].Journal of Northeast Petroleum University,2014,38(1):10-16.
[4]孙晓.大牛地气田大35-大47井区太2段气层沉积相研究[D].北京:中国矿业大学,2008.Sun Xiao.Study on sedimentary facies of Tai 2member gas zone in Daniudi gas field Da 35-Da 47well areas[D].Beijing:China University of Mining&Technology,2008.
[5]岳艳.浅谈重矿物物源分析方法[J].科技情报开发与经济,2010,20(12):138-139.Yue Yan.Introduction of the provenance analysis of heavy mineral[J].Sci-Tech Information Development&Economy,2010,20(12):138-139.
[6]姜在兴.沉积学[M].北京:石油工业出版社,2003:87-112.Jiang Zaixing.Sedimentary[M].Beijing:Petroleum Industry Publishing Press,2003:87-112.
[7]何幼斌,王广文.沉积岩与沉积相[M].北京:石油工业出版社,2007:132-135.He Youbin,Wang Guangwen.Sedimentary rocks and sedimentary faces[M].Beijing:Petroleum Industry Publishing Press,2007:132-135.
[8]梅冥相,马永生,高金汉,等.滇黔桂盆地及其邻区晚古生代层序地层格架及相对海平面变化[J].现代地质,2002,16(4):365-373.Mei Mingxiang,Ma Yongsheng,Gao Jinhan,et al.Carboniferous to Permian sequence stratigraphic framework of the YunnanGuizhou-Guangxi basin and its adjacent areas and global correlation of third-order sea-level change[J].GeoScience,2002,16(4):365-373.
[9]焦大庆,马永生,邓军,等.黔桂地区石炭纪层序地层格架及古地理演化[J].现代地质,2003,17(3):294-302.Jiao Daqing,Ma Yongsheng,Deng Jun,et al.Sequence stratigrapy framework and evolution of litho-paleogeographic in Carboniferous in southern Guizhong-middle Guangxi area[J].GeoScience,2003,17(3):294-302.
[10]赵明鹏,陈敏.广西罗城-鹿寨地区石炭系沉积相类型及沉积环境演化[J].地质论评,1995,41(6):517-524.Zhao Mingpeng,Chen Min.Sedimentary facies types and evolution of depositional environments of the Carboniferous strata in the Luocheng-Luzhai region,Guangxi[J].Geology review,1995,41(6):517-524.
[11]隆轲.黔南-桂中地区石炭纪层序岩相古地理特征及演化[D].成都:成都理工大学,2010.Long Ke.Carboniferous sequence lithofacies palaeogeography charateristic and its evolution in south Guizhou and middle Guangxi[J].Chengdu:Chengdu University of Technology,2010.
[12]马永生,楼章华,郭彤楼,等.中国南方海相地层油气保存条件综合评价技术体系探讨[J].地质学报,2006,80(3):406-417.Ma Yongsheng,Lou Zhanghua,Guo Tonglou,et al.An exploration on a technological system of petroleum preservation evaluation for marine strata in south China[J].Acta Geologica Sinica,2006,80(3):406-417.
[13]蔡勋育,黄仁春.桂中坳陷构造演化与油气成藏[J].南方油气,2003,16(3):6-9.Cai Xunyu,Huang Renchun.Tectonic evolution and hydrocarbon accumulation of the Guizhong depression[J].Southern China Oil&Gas,2003,16(3):6-9.
[14]楼章华,尚长健,姚更顺,等.桂中坳陷及周缘海相地层保存条件[J].石油学报,2011,32(3):432-440.Lou Zhanghua,Shang Changjian,Yao Gengshun,et al.Hydrocarbon preservation conditions in marine strata of the Guizhong depression and its margin[J].Acta Petrolei Sinica,2011,32(3):432-440.
[15]吴国干,姚根顺,徐政语,等.桂中坳陷改造期构造样式及其成因[J].海相油气地质,2009,14(1):33-41.Wu Guogan,Yao Gengshun,Xu Zhengyu,et al.Structural patterns and origin of tectonic reformation in Guizhong depression[J].Marine Origin Petroleum Geology,2009,14(1):33-41.
[16]陈子炓,姚根顺,楼章华,等.桂中坳陷及周缘油气保存条件分析[J].中国矿业大学学报,2011,40(1):80-88.Chen Ziliao,Yao Genshun,Lou Zhanghua,et al.Study of hydrocarbon preservation condition in Guizhong depression and the margin[J].Journal of China University of Mining&Technology,2011,40(1):80-88.
[17]叶晓斌.黔南-桂中坳陷油气保存条件分析[J].南方油气,2005,18(1):16-20.Ye Xiaobin.Study on hydrocarbon preservation conditions in Qiannan-Guizhong depression[J].Southern China Oil&Gas,2005,18(1):16-20.
[18]刘东成.桂中坳陷构造演化及油气保存条件分析[D].北京:中国石油大学(北京),2009.Liu Dongcheng.The analysis of tectonic evolution and preservation condition of oil and gas in Guizhong depression[D].Beijing:China University of Petroleum(Beijing),2009.
[19]白忠峰.桂中坳陷构造特征及其与油气关系[D].北京:中国地质大学(北京),2006.Bai Zhongfeng.Structural characteristics and the relation with the Petruleum and gas in Guizhong depression[D].Beijing:China U-niversity of Geosicences(Beijing),2006.
[20]胡东风,李宇平,段金宝,等.桂中地区泥盆纪碳酸盐岩沉积特征与孤立台地礁滩演化[J].岩石学报,2017,33(4):1135-1147.Hu Dongfeng,Li Yuping,Duan Jinbao,et al.Sedimentary features of carbonates and evolution of isolated platforms in Devonian in Guizhong area[J].Acta Petrologica Sinica,2017,33(4):1135-1147.
[21]张矿明,范志伟,罗彦萍,等.桂中坳陷泥盆纪层序岩相古地理与孤立丘台礁滩发育特征[J].沉积学报,2017,35(1):102-116.Zhang Kuangming,Fan Zhiwei,Luo Yanping,et al.Sequence litho-paleogeography and ccharacteristics of Devonian isolated reef in Guizhong depression[J].Acta Sedimentologica Sinica,2017,35(1):102-116.
[22]Galloway W E.Genetic Stratigraphic sequence in basin analysis I:Architecture and genesis of flooding-surface bounded depositional units[J].AAPG Bulletin,1989,17(6):29-34.
[23]刘磊,朱博华,刘显太,等.中国滩坝砂勘探现状与储层基本特征分析[J].特种油气藏,2013,20(5):14-19.Liu Lei,Zhu Bohua,Liu Xiantai,et al.Exploration status and basic characteristics of beach-bar sand reservoirs in China[J].Special Oil&Gas Reservoirs,2013,20(5):14-19.