龙女寺—广安地区栖霞组储层特征及主控因素
|
摘要
为了明确四川盆地龙女寺—广安地区中二叠统栖霞组储层特征与主控因素,综合利用岩心、镜下薄片、测井资料、地震预测成果分析了该地区中二叠统栖霞组储层特征,指出了其储集岩类型以残余生屑云岩、中—细晶云岩为主,储集空间中孔隙类型以晶间孔、晶间溶孔为主,溶洞类型以孔隙型溶洞为主、次为裂缝型溶洞。研究结果表明:①其储层物性为低孔—低渗背景下的局部高孔—高渗,主要储层类型为裂缝—孔隙(洞)型,白云岩储层发育受多因素控制,古地貌控制下的台内生屑滩为后期建设性成岩作用的改造提供了宝贵的物质基础;②生屑滩滩体的分布范围大致决定了储层分布范围;③后期白云石化作用和埋藏溶蚀作用是优质白云岩储层形成的决定性因素;④多期构造运动形成的构造裂缝极大地改善了白云岩储层的储渗能力。研究区栖霞组白云岩储层纵向上具有单套厚度薄、多套叠置的特点,横向则分布不连续,展现出较强的非均质性,在MX42、MX107、MX31-X1、GS16井区集中发育。
In order to figure out the reservoir characteristics and control factors of the Qixia Formation, Middle Permian in the Longnvsi-Guang'an area, the reservoir characteristics of the Qixia Formation, Middle Permian in the Longnvsi-Guang'an area were analyzed using the core, microscopic thin section, well logging and seismic prediction results comprehensively. It was pointed out the reservoirs are mainly classified into residual bioclastic dolomite and medium-fine crystalline dolomite, the porous reservoir spaces are mainly intercrystalline pore and intercrystalline dissolution pore, and the caves are primarily porous caves and secondarily fractured caves. And the follows research results were obtained. First, its physical properties are local high porosity and high permeability in the setting of low porosity and low permeability, the reservoirs are mainly of fracture-pore(cave) type, the development of dolomite reservoirs is under the control of multiple factors, and the palaeogeomorphology controlled intraplatform bioclastic beach provides the valuable material base for the transformation of constructive diagenesis in the late stage. Second, the distribution range of bioclastic beach bodies determines approximately the distribution range of reservoirs. Third, dolomitization and burial dissolution are the decisive factors for the formation of high-quality dolomite reservoirs. Fourth, the structural fractures resulted from multistage tectonic movement improve the preservation and seepage capacity of dolomite reservoirs. In conclusion, the dolomite reservoir of Qixia Formation in this area is vertically characterized by small thickness of single layer and superposition of multiple layers and laterally by discontinuous distribution and stronger heterogeneity, and it is mainly developed at Well blocks MX42, MX107, MX31-X1 and GS16.
In order to figure out the reservoir characteristics and control factors of the Qixia Formation, Middle Permian in the Longnvsi-Guang'an area, the reservoir characteristics of the Qixia Formation, Middle Permian in the Longnvsi-Guang'an area were analyzed using the core, microscopic thin section, well logging and seismic prediction results comprehensively. It was pointed out the reservoirs are mainly classified into residual bioclastic dolomite and medium-fine crystalline dolomite, the porous reservoir spaces are mainly intercrystalline pore and intercrystalline dissolution pore, and the caves are primarily porous caves and secondarily fractured caves. And the follows research results were obtained. First, its physical properties are local high porosity and high permeability in the setting of low porosity and low permeability, the reservoirs are mainly of fracture-pore(cave) type, the development of dolomite reservoirs is under the control of multiple factors, and the palaeogeomorphology controlled intraplatform bioclastic beach provides the valuable material base for the transformation of constructive diagenesis in the late stage. Second, the distribution range of bioclastic beach bodies determines approximately the distribution range of reservoirs. Third, dolomitization and burial dissolution are the decisive factors for the formation of high-quality dolomite reservoirs. Fourth, the structural fractures resulted from multistage tectonic movement improve the preservation and seepage capacity of dolomite reservoirs. In conclusion, the dolomite reservoir of Qixia Formation in this area is vertically characterized by small thickness of single layer and superposition of multiple layers and laterally by discontinuous distribution and stronger heterogeneity, and it is mainly developed at Well blocks MX42, MX107, MX31-X1 and GS16.
引文
[1]陈宗清.论四川盆地中二叠统栖霞组天然气勘探[J].天然气地球科学,2009,20(3):325-334.CHEN Zongqing. Discussion on Gas Explorat ion of Middle Permian Qixia Formation,Sichuan Basin[J]. Natural Gas Geoscience,2009,20(3):325-334.
[2]杨光,汪华,沈浩,等.四川盆地中二叠统储层特征与勘探方向[J].天然气工业,2015,35(7):10-16.Yang Guang,Wang Hua,Shen Hao,et al. Characteristics and exploration prosrects of Middle Permian reservoirs in the Sichuan Basin[J]. Natural Gas Industry,2015,35(7):10-16.
[3]沈平,张健,宋家荣,等.四川盆地中二叠统天然气勘探新突破的意义及有利勘探方向[J].天然气工业,2015,35(7):1-9.Shen Ping, Zhang Jian, Song Jiarong, et al. Significance of new breakthrough in and favorable targets of gas exploration in the Middle Permian system, Sichuan Basin[J]. Natural Gas Industry,2015,35(7):1-9.
[4]田景春,林小兵,张翔,等.四川盆地中二叠统栖霞组滩相白云岩多重成因机理及叠加效应[J].岩石学报,2014,30(3):679-686.Tian Jingchun,Lin Xiaobin,Zhang Xiang,et al. The genetic mechanism of shoal facies dolomiteand its additive effect of Permian Qixia Formation in Sichuan Basin[J].Acta Petrologica Sinica,2014,30(3):679-686.
[5]陈轩,赵文智,张利萍,等.川中地区中二叠统构造热液白云岩的发现及其勘探意义[J].石油学报,2012,33(4):562-569.Chen Xuan,Zhao Wenzhi,Zhang Liping,et al. Discovery and exploration significance of structure-controlled hydrothermal dolomitesIn the Middle Permian of the central Sichuan Basin[J]. Acta Petrolei Sinica, 2012, 33(4):562-569.
[6]江青春,胡素云,汪泽成,等.四川盆地中二叠统中—粗晶白云岩成因[J].石油与天然气地质,2014(4):503-510.Jiang Qingchun,Hu Suyun,Wang Zecheng,et al. Genesis of medium-macro-crystalline dolomite in the Middle Permian of Sichuan basin[J]. Oil&Gas Geology, 2014(4):503-510.
[7]胡明毅,魏国齐,胡忠贵,等.四川盆地中二叠统栖霞组层序—岩相古地理[J].古地理学报,2010,12(5):515-526.Hu Mingyi,Wei Guoqi,Hu Zhonggui,et al. Sequencelithofacies palaeogeography of the Middle Permian\Qixia Formation in Sichuan Basin[J]. Journal of Palaeogeography,2010,12(5):515-526.
[8]黄涵宇,何登发,李英强,等.四川盆地及邻区二叠纪梁山—栖霞组沉积盆地原型及其演化[J].岩石学报,2017,33(4):1 317-1 337.Huang Hanyu,He Dengfa,Li Yingqiang,et al. The prototype and its evolution of the Sichuan sedimentary basin andadjacent areas during Liangshan and Qixia stages in Permian[J]. Acta Petrologica Sinica,2017,33(4):1 317-1 337.
[9]姜华,汪泽成,杜宏宇,等.乐山—龙女寺古隆起构造演化与新元古界震旦系天然气成藏[J].天然气地球科学,2014,25(2):192-200.Jiang Hua,Wang Zecheng,Du Hongyu,et al. Tectonic evolution of the Leshan-LongnvsiPaleo-uplift and reservoir formation of Neoproterozoic Sinian gas[J]. Natural Gas Geoscience,2014,25(2):192-200.
[10]蒋裕强,谷一凡,李开鸿,等.四川盆地中部中二叠统热液白云岩储渗空间类型及成因[J].天然气工业,2018(2):16-24.Jiang Yuqiang, Gu Yifan, Li Kaihong, et al. Space types and origins of hydrothermal dolomite reservoirs in the Middle Permian strata, Central Sichuan Basin[J]. Natural Gas Industry,2018(2):16-24.
[11]汪华,沈浩,黄东,等.四川盆地中二叠统热水白云岩成因及其分布[J].天然气工业,2014,34(9):25-32.Wang Hua,Shen Hao,Huang Dong,et al. Origin and distribution of hydrothermal dolomites of the Middle Permian in the Sichuan Basin[J]. Natural Gas Industry,2014,34(9):25-32.
[12]刘治成,杨巍,王炜,等.四川盆地中二叠世栖霞期微生物丘及其对沉积环境的启示[J].中国地质,2015,42(4):1 009-1 023.Liu Zhicheng,Yang Wei,Wang Wei,et al. The microbial mud mound of the Middle Permian Qixia period in Sihuan basin and its indication significance to sedimentary environment[J]. Geology in China, 2015, 42(4):1 009-1 023.
[13]梅庆华,何登发,文竹,等.四川盆地乐山—龙女寺古隆起地质结构及构造演化[J].石油学报,2014,35(1):11-25.Mei Qinghua, He Dengfa, Wen Zhu, et al. Geologic structure and tectonic evolution of Leshan-Longnvsi Paleo-uplift in Sichuan Basin,China[J]. Acta Petrolei Sinica,2014,35(1):11-25.
[14]江青春,胡素云,汪泽成,等.四川盆地茅口组风化壳岩溶古地貌及勘探选区[J].石油学报,2012,33(6):949-960.Jiang Qingchun,Hu Suyun,Wang Zecheng,et al. Paleokarst landform of the weathering crust of Middle Permian Maokou Formation in Sichuan Basin and selection of exploration regions[J]. Acta Petrolei Sinica,2013,33(6):949-960.
[15]黄思静,吕杰,兰叶芳,等.四川盆地西部中二叠统白云岩/石的主要结构类型——兼论其与川东北上二叠统—三叠系白云岩/石的差异[J].岩石学报,2011,27(8):2 253-2 262.Huang Sijing,LvJie,LanYefang,et al. The main texture of dolomite of Middle Permian,westernSichuan basin:Concurrently on the differences with Upper Permian-Triassic,Northeast Sichuan basin[J]. Acta PetrologicaSinica,2011,27(8):2 253-2 262.
[16]宋金民,刘树根,李智武,等.四川盆地上震旦统灯影组微生物碳酸盐岩储层特征与主控因素[J].石油与天然气地质,2017,38(4):741-752.Song Jinmin,Liu Shugen,Li Zhiwu,et al. Characteristics and controlling factors of microbial carbonate reservoirsin the Upper Sinian Dengying Formation in the Sichuan Basin,China[J]. Oil&Gas Geology,2017,38(4):741-752.
[17]李昌峰,侯明才,张小青,等.川东北元坝地区上二叠统长兴组优质储层形成机制[J].地质力学学报,2015(2):278-289.Li Changfeng, Hou Mincai, Zhang Xiaoqing, et al.Formation Mechanism of High-Quality Reservoirs in the Upper Permian ChangXing Formationg in YuanBa Gas Field, NorthEastern Sichuan Basin[J]. Joural of Geomechanics,2015(2):278-289.
[18]钱程,赵少泽,郭磊,等.川中南部栖霞—茅口组沉积相特征及滩相展布[J].天然气技术与经济,2015,9(6):9-12.Qian Cheng,Zhao Shaoze,Guo Lei,et al. Sedimentary-facies Features and shoal-facies distribution of Xixia-Maokou Formations,south of Central Sichuan Basin[J]. Natural Gas Technology and Economy, 2015, 9(6):9-12.
[2]杨光,汪华,沈浩,等.四川盆地中二叠统储层特征与勘探方向[J].天然气工业,2015,35(7):10-16.Yang Guang,Wang Hua,Shen Hao,et al. Characteristics and exploration prosrects of Middle Permian reservoirs in the Sichuan Basin[J]. Natural Gas Industry,2015,35(7):10-16.
[3]沈平,张健,宋家荣,等.四川盆地中二叠统天然气勘探新突破的意义及有利勘探方向[J].天然气工业,2015,35(7):1-9.Shen Ping, Zhang Jian, Song Jiarong, et al. Significance of new breakthrough in and favorable targets of gas exploration in the Middle Permian system, Sichuan Basin[J]. Natural Gas Industry,2015,35(7):1-9.
[4]田景春,林小兵,张翔,等.四川盆地中二叠统栖霞组滩相白云岩多重成因机理及叠加效应[J].岩石学报,2014,30(3):679-686.Tian Jingchun,Lin Xiaobin,Zhang Xiang,et al. The genetic mechanism of shoal facies dolomiteand its additive effect of Permian Qixia Formation in Sichuan Basin[J].Acta Petrologica Sinica,2014,30(3):679-686.
[5]陈轩,赵文智,张利萍,等.川中地区中二叠统构造热液白云岩的发现及其勘探意义[J].石油学报,2012,33(4):562-569.Chen Xuan,Zhao Wenzhi,Zhang Liping,et al. Discovery and exploration significance of structure-controlled hydrothermal dolomitesIn the Middle Permian of the central Sichuan Basin[J]. Acta Petrolei Sinica, 2012, 33(4):562-569.
[6]江青春,胡素云,汪泽成,等.四川盆地中二叠统中—粗晶白云岩成因[J].石油与天然气地质,2014(4):503-510.Jiang Qingchun,Hu Suyun,Wang Zecheng,et al. Genesis of medium-macro-crystalline dolomite in the Middle Permian of Sichuan basin[J]. Oil&Gas Geology, 2014(4):503-510.
[7]胡明毅,魏国齐,胡忠贵,等.四川盆地中二叠统栖霞组层序—岩相古地理[J].古地理学报,2010,12(5):515-526.Hu Mingyi,Wei Guoqi,Hu Zhonggui,et al. Sequencelithofacies palaeogeography of the Middle Permian\Qixia Formation in Sichuan Basin[J]. Journal of Palaeogeography,2010,12(5):515-526.
[8]黄涵宇,何登发,李英强,等.四川盆地及邻区二叠纪梁山—栖霞组沉积盆地原型及其演化[J].岩石学报,2017,33(4):1 317-1 337.Huang Hanyu,He Dengfa,Li Yingqiang,et al. The prototype and its evolution of the Sichuan sedimentary basin andadjacent areas during Liangshan and Qixia stages in Permian[J]. Acta Petrologica Sinica,2017,33(4):1 317-1 337.
[9]姜华,汪泽成,杜宏宇,等.乐山—龙女寺古隆起构造演化与新元古界震旦系天然气成藏[J].天然气地球科学,2014,25(2):192-200.Jiang Hua,Wang Zecheng,Du Hongyu,et al. Tectonic evolution of the Leshan-LongnvsiPaleo-uplift and reservoir formation of Neoproterozoic Sinian gas[J]. Natural Gas Geoscience,2014,25(2):192-200.
[10]蒋裕强,谷一凡,李开鸿,等.四川盆地中部中二叠统热液白云岩储渗空间类型及成因[J].天然气工业,2018(2):16-24.Jiang Yuqiang, Gu Yifan, Li Kaihong, et al. Space types and origins of hydrothermal dolomite reservoirs in the Middle Permian strata, Central Sichuan Basin[J]. Natural Gas Industry,2018(2):16-24.
[11]汪华,沈浩,黄东,等.四川盆地中二叠统热水白云岩成因及其分布[J].天然气工业,2014,34(9):25-32.Wang Hua,Shen Hao,Huang Dong,et al. Origin and distribution of hydrothermal dolomites of the Middle Permian in the Sichuan Basin[J]. Natural Gas Industry,2014,34(9):25-32.
[12]刘治成,杨巍,王炜,等.四川盆地中二叠世栖霞期微生物丘及其对沉积环境的启示[J].中国地质,2015,42(4):1 009-1 023.Liu Zhicheng,Yang Wei,Wang Wei,et al. The microbial mud mound of the Middle Permian Qixia period in Sihuan basin and its indication significance to sedimentary environment[J]. Geology in China, 2015, 42(4):1 009-1 023.
[13]梅庆华,何登发,文竹,等.四川盆地乐山—龙女寺古隆起地质结构及构造演化[J].石油学报,2014,35(1):11-25.Mei Qinghua, He Dengfa, Wen Zhu, et al. Geologic structure and tectonic evolution of Leshan-Longnvsi Paleo-uplift in Sichuan Basin,China[J]. Acta Petrolei Sinica,2014,35(1):11-25.
[14]江青春,胡素云,汪泽成,等.四川盆地茅口组风化壳岩溶古地貌及勘探选区[J].石油学报,2012,33(6):949-960.Jiang Qingchun,Hu Suyun,Wang Zecheng,et al. Paleokarst landform of the weathering crust of Middle Permian Maokou Formation in Sichuan Basin and selection of exploration regions[J]. Acta Petrolei Sinica,2013,33(6):949-960.
[15]黄思静,吕杰,兰叶芳,等.四川盆地西部中二叠统白云岩/石的主要结构类型——兼论其与川东北上二叠统—三叠系白云岩/石的差异[J].岩石学报,2011,27(8):2 253-2 262.Huang Sijing,LvJie,LanYefang,et al. The main texture of dolomite of Middle Permian,westernSichuan basin:Concurrently on the differences with Upper Permian-Triassic,Northeast Sichuan basin[J]. Acta PetrologicaSinica,2011,27(8):2 253-2 262.
[16]宋金民,刘树根,李智武,等.四川盆地上震旦统灯影组微生物碳酸盐岩储层特征与主控因素[J].石油与天然气地质,2017,38(4):741-752.Song Jinmin,Liu Shugen,Li Zhiwu,et al. Characteristics and controlling factors of microbial carbonate reservoirsin the Upper Sinian Dengying Formation in the Sichuan Basin,China[J]. Oil&Gas Geology,2017,38(4):741-752.
[17]李昌峰,侯明才,张小青,等.川东北元坝地区上二叠统长兴组优质储层形成机制[J].地质力学学报,2015(2):278-289.Li Changfeng, Hou Mincai, Zhang Xiaoqing, et al.Formation Mechanism of High-Quality Reservoirs in the Upper Permian ChangXing Formationg in YuanBa Gas Field, NorthEastern Sichuan Basin[J]. Joural of Geomechanics,2015(2):278-289.
[18]钱程,赵少泽,郭磊,等.川中南部栖霞—茅口组沉积相特征及滩相展布[J].天然气技术与经济,2015,9(6):9-12.Qian Cheng,Zhao Shaoze,Guo Lei,et al. Sedimentary-facies Features and shoal-facies distribution of Xixia-Maokou Formations,south of Central Sichuan Basin[J]. Natural Gas Technology and Economy, 2015, 9(6):9-12.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |