鄂西-渝东区长兴组礁滩体发现及相带分布
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摘要
开江-梁平陆棚周缘的台缘相带是大型天然气藏发育的有利地区,陆棚相带的分布控制和影响长兴组—飞仙关组礁滩相带的展布。为了准确描述其分布,通过对岩心、岩屑、薄片等分析测试资料的研究,系统分析了岩石的颗粒结构、生物构成、结构类型等特征。利用三维地震资料对生物礁、滩体的形态及分布进行了预测。同时综合钻井资料、露头及地震资料精细刻画了长兴组沉积相带的展布。研究表明,箭竹溪生物礁是典型台地边缘相生物礁,具有明显的丘状外形、近南北向展布;在生物礁底部发育的浅滩白云岩分布范围较大,其主体位于箭竹溪生物礁的东部,与台地紧密相连;开江-梁平陆棚经过箭竹溪生物礁西侧向东南延伸与鄂西盆地相通,且箭竹溪生物礁与普光地区生物礁处于同一个台地边缘相带上。
Platform margin facies belts surrounding Kaijiang-Liangping continental shelf are favorable for the development of large gas field.The distribution of the continental shelf controls the distribution of reef and shoal facies belts.In order to accurately map the distribution of reef and shoal facies belts,the core,cutting and thin section data were integrated to systematically analyze the grain size,fossil composition and structure types.Moreover,3D seismic data were used to predict the appearance and distribution of the reefs and shoals,and the sedimentary faces in Changxing Formation were mapped by integrating drilling and outcrops data.The nearly NS-trending dome-shaped Jianzhuxi bioherm is of typical platform margin facies.The shoal-facies dolomite at the bottom of the bioherm is large in lateral distribution and its major part is located in the east of the bioherm and is closely interconnected with the platform.The Kaijiang-Liangping continental shelf extends southeastwards across the western part of the Jianzhuxi bioherm and is connected with to West Hubei marine basin.The Jianzhuxi bioherm is located in the same platform margin facies belts with that of the bioherms in Puguang areas.
Platform margin facies belts surrounding Kaijiang-Liangping continental shelf are favorable for the development of large gas field.The distribution of the continental shelf controls the distribution of reef and shoal facies belts.In order to accurately map the distribution of reef and shoal facies belts,the core,cutting and thin section data were integrated to systematically analyze the grain size,fossil composition and structure types.Moreover,3D seismic data were used to predict the appearance and distribution of the reefs and shoals,and the sedimentary faces in Changxing Formation were mapped by integrating drilling and outcrops data.The nearly NS-trending dome-shaped Jianzhuxi bioherm is of typical platform margin facies.The shoal-facies dolomite at the bottom of the bioherm is large in lateral distribution and its major part is located in the east of the bioherm and is closely interconnected with the platform.The Kaijiang-Liangping continental shelf extends southeastwards across the western part of the Jianzhuxi bioherm and is connected with to West Hubei marine basin.The Jianzhuxi bioherm is located in the same platform margin facies belts with that of the bioherms in Puguang areas.
引文
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[2]王一刚,文应初,洪海涛,等.四川盆地北部晚二叠世—早三叠世碳酸盐岩斜坡相带沉积特征[J].古地理学报,2009,11(2):143-156.Wang Yigang,Wen Yingchu,Hong Haitao,et al.Carbonate slopefacies sedimentary characteristics of the late Permian to early Triassicin northern Sichuan basin[J].Journal of Palaeogeography,2009,11(2):143-156.
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[4]陈洪德,钟怡江,侯明才,等.川东北地区长兴组-飞仙关组碳酸盐岩台地层序充填结构及成藏效应[J].石油与天然气地质,2009,30(5):539-547.Chen Hongde,Zhong Yijiang,Hou Mingcai,et al.Sequence stylesand hydrocarbon accumulation effects of carbonate rock platform inthe Changxing-Feixianguan Formations in the Northeastern SichuanBasin[J].Oil&Gas Geology,2009,30(5):539-547.
[5]郭彤楼.川东北地区飞仙关组鲕滩储层成岩作用——以宣汉-达县及元坝区块为例[J].石油与天然气地质,2010,31(5):620-631.Guo Tonglou.Diagenesis of the Feixianguan oolitic shoal reservoirs inthe northeastern Sichuan Basin—examples from Xuan-han-Daxianand Yuanba areas[J].Oil&Gas Geology,2010,31(5):620-631.
[6]刘彬,付孝悦,刘国萍,等.川东北河坝地区储层预测与评价[J].石油与天然气地质,2008,29(5):690-696.Liu Bin,Fu Xiaoyue,LiuGuoping,et al.Prediction and evaluation ofreservoirs in Heba area,the northeastern Sichuan basin[J].Oil&Gas Geology,2008,29(5):690-696.
[7]张建勇,周进高,郝毅,等.四川盆地环开江-梁平海槽长兴组—飞仙关组沉积模式[J].海相油气地质,2011,16(3):45-54.Zhang Jianyong,Zhou Jingao,Hao Yi,et al.A sedimentary model ofChangxing and Feixianguan reservoirs around Kaijiang-Liangpingtrough in Sichuan basin[J].Marine Origin Petroleum Geology,2011,16(3):45-54.
[8]魏国齐,谢增业,刘满仓,等.四川盆地长兴-飞仙关组的有利储集相带[J].天然气工业,2009,29(9):35-38.Wei Guoqi,Xie Zengye,Liu Mancang,et al.Favorable reservoir faciestracts in the Changxing-Feixianguan formations of Sichuan basin[J].Natural Gas Industry,2009,29(9):35-38.
[9]马永生,蔡勋育.四川盆地川东北区二叠系-三叠系天然气勘探成果与前景展望[J].石油与天然气地质,2006,27(6):741-750.Ma Yongsheng,Cai Xunyu.Exploration achievements and prospectsof the Permian-Triassic natural gas in northeastern Sichuan Basin[J].Oil&Gas Geology,2006,27(6):741-750.
[10]范文科,张福东,王宗礼,等.中国石油“十一五”天然气勘探新进展与未来大气田勘探新领域分析[J].中国石油勘探,2012,(1):8-13,18.Fan Wenke,Zhang Fudong,Wang Zongli,et al.New progress in natu-ral gas exploration during“11th Five-Year Plan”Period and analysison PetroChina’s new domains of large gas field exploration in future[J].China Petroleum Exploration,2012,(1):8-13,18.
[11]钟怡江,陈洪德,林良彪,等.川东北地区长兴期—飞仙关期沉积体系分析[J].石油物探,2010,49(5):522-530.Zhong Yijiang,Chen Hongde,Lin Liangbiao,et al.Depositional sys-tem of Changxing-Feixianguan period in northeastern Sichuan basin[J].Geophysical Prospecting for Petroleum,2010,49(5):522-530.
[12]张奇,文龙,徐亮,等.四川盆地二、三叠系碳酸盐岩大气田类型及其成藏规律[J].天然气工业,2012,32(1):33-38.Zhang Qi,Wen Long,Xu Liang,et al.Types and gas accumulationpatterns of large Permian and Triassic carbonate gas reservoirs inSichuan basin[J].Natural Gas Industry,2012,32(1):33-38.
[13]牟传龙,马永生,王瑞华,等.川东北地区上二叠统盘龙洞生物礁成岩作用研究[J].沉积与特提斯地质,2005,25(1-2):198-202.Mu Chuanlong,Ma Yongsheng,Wang Ruihua,et al.Diagenesis of theUpper Permian Panlongdong organic reefs in northeastern Sichuan[J].Sedimentary Geology and Tethyan Geology,2005,25(1-2):198-202.
[14]马永生,牟传龙,郭彤楼.四川盆地东北部长兴组层序地层与储层分布[J].地学前缘,2005,12(3):179-185.Ma Yongsheng,Mu Chuanlong,Guo Tonglou.Sequence stratigraphyand reservoir distribution of the Changxing Formation in northeasternSichuan Basin[J].Earth Science Frontiers,2005,12(3):179-185.
[15]倪新锋,陈洪德,韦东晓.礁滩复合型气藏物质聚集分布及储层特征研究——以川东北地区普光气田长兴组—飞仙关组为例[J].中国地质,2007,34(6):1045-1054.Ni Xinfeng,Chen Hongde,Wei Dongxiao.Distribution and accumula-tion of materials inshoal-reef compound gas deposits and reservoircharacteristics—a case study of the Changxing-Feixian Formation inthe Puguang gas field,northeastern Sichuan[J].Geology in China,2007,34(6):1045-1054.
[16]马永生.四川盆地普光超大型气田的形成机制[J].石油学报,2007,28(2):9-14,21.Ma Yongsheng.Generation mechanism of Puguang gas field in Si-chuan Basin[J].Acta Petrolei Sinica,2007,28(2):9-14,21.
[17]马永生,郭旭升,郭彤楼,等.四川盆地普光大型气田的发现与勘探启示[J].地质论评,2005,51(4):35-43.Ma Yongsheng,Guo Xusheng,Guo Tong,et al.Discovery of the large-scale Puguang gas filed in the Sichuan basin and its enlightenment forhydrocarbon prospecting[J].Geological Review,2005,51(4):35-43.
[18]刘全有,金之钧,高波,等.四川盆地二叠系烃源岩类型与生烃潜力[J].石油与天然气地质,2012,33(1):10-18.Liu Quanyou,Jin Zhijun,Gao Bo,et al.Types and hydrocarbon gene-ration potential of the Permian source rocks in the Sichuan Basin[J].Oil&Gas Geology,2012,33(1):10-18.
[19]张俊,蔡镠璐,向雷,等.川东北地区飞仙关组成岩晚期白云石溶解作用[J].石油与天然气地质,2012,33(4):599-606.Zhang Jun,Cai Liulu,Xiang Lei,et al.Late diagenetic dissolution ofdolomites in the Feixianguan Formation,northeastern Sichuan Basin[J].Oil&Gas Geology,2012,33(4):599-606.
[20]张汉荣,孙跃峰,窦齐丰,等.孔隙结构参数在普光气田的初步应用[J].石油与天然气地质,2012,33(6):877-882.Zhang Hanrong,Sun Yuefeng,Dou Qifeng,et al.Preliminary applica-tion of the frame flexibility factor in Puguang gas field[J].Oil&GasGeology,2012,33(6):877-882.
[21]刘文波,汪益宁,赖枫鹏.四川东北部长兴-飞仙关组沉积相展布及储层发育[J].科学技术与工程,2011,11(28):6952-6955.Liu Wenbo,Wang Yining,Lai Fengpeng.Northeast Sichuan Chang-xing-Feixianguan sedimentary facies and reservoir development[J].Science Technology and Engineering,2011,11(28):6952-6955.
[22]管宏林,蒋小琼,王恕一,等.普光气田与建南气田长兴组、飞仙关组储层对比研究[J].石油实验地质,2010,32(2):130-135.Guan Honglin,Jiang Xiaoqiong,Wang Shuyi,et al.A comparativestudy of reservoirs of the Changxing and Feixianguan formation be-tween Puguang gas-field and Jiannan gas-field in Sichuan basin[J].Petroleum Geology and Experiment,2010,32(2):130-135.
[23]董霞,郑荣才,罗爱军,等.开江—梁平台内海槽东段长兴组层序岩相古地理特征[J].沉积学报,2009,27(6):1124-1130.Dong Xia,Zheng Rongcai,Luo Aijun,et al.Characteristics ofsequence-based lithofacies and paleogeography of the Changxing For-mation in the eastern Kaijiang-Liangping intra-platform trough[J].Acta Petrolei Sinica,2009,27(6):1124-1130.
[24]郑有恒,刘漪,徐鸿娟,等.鄂西渝东区晚二叠世长兴组沉积期沉积相及礁、滩分布规律[J].石油天然气学报,2010,32(5):31-35.Zheng Youheng,Liu Yi,Xu Hongjuan,et al.The rules of sedimentaryfacies,reef and bank distribution of Western Hubei-Eastern Chongqingarea of Changxing formation at late Permian stage[J].Journal of Oiland Gas Technology,2010,32(5):31-35.
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