四川盆地元坝气田须家河组三段气藏致密钙屑砂岩储层发育机理
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摘要
元坝气田须家河组三段钙屑砂岩储层致密且非均质性强、产能差异大,利用岩芯、薄片及电成像资料,结合水动力条件、砂体厚度、岩石骨架、裂缝作用、裂缝主导等因素,初步明确该区钙屑砂岩优质储层发育机理。优质钙屑砂岩主要受沉积水动力强弱控制,碳酸盐岩岩屑含量、岩石粒度、砂体厚度是控制优质储层发育的基础,裂缝双重渗流作用是关键,砂体内部结构的非均性是裂缝发育的主导因素。综合研究认为,单层厚度小(<3 m)、累积厚度大(> 10 m)的刚性非均质叠置砂体具有勘探开发潜力。
The calcarenaceous sandstone reservoir of the third member of Xujiahe Formation in Yuanba gas field is tight and with strong heterogeneity. The reservoir productivity varies greatly. Based on core and electro-imaging data,thin section analysis,sedimentary hydrodynamic condition,sand thickness,particle size of rock matrix,fracturing,and the leading factor of fracture,the macro mechanism of high quality calcarenaceous sandstone reservoir has been defined preliminarily. The distribution of high calcarenaceous sandstone is manly controlled by the strength of sedimentary hydrodynamics. The distribution of high quality reservoir is based on the content of carbonate rock fragments,grain size and the sand thickness,and the double seepage action of fracture is the key. The structural heterogeneity within sand body is the main factor of fracture development. Comprehensive study shows that the rigid heterogeneous stacked sand bodies with single thickness smaller than 3 meters and accumulated thickness more than 10 meters have the potential of exploration and development.
The calcarenaceous sandstone reservoir of the third member of Xujiahe Formation in Yuanba gas field is tight and with strong heterogeneity. The reservoir productivity varies greatly. Based on core and electro-imaging data,thin section analysis,sedimentary hydrodynamic condition,sand thickness,particle size of rock matrix,fracturing,and the leading factor of fracture,the macro mechanism of high quality calcarenaceous sandstone reservoir has been defined preliminarily. The distribution of high calcarenaceous sandstone is manly controlled by the strength of sedimentary hydrodynamics. The distribution of high quality reservoir is based on the content of carbonate rock fragments,grain size and the sand thickness,and the double seepage action of fracture is the key. The structural heterogeneity within sand body is the main factor of fracture development. Comprehensive study shows that the rigid heterogeneous stacked sand bodies with single thickness smaller than 3 meters and accumulated thickness more than 10 meters have the potential of exploration and development.
引文
[1]李昌峰.川东北元坝地区须三气藏致密储层特征及分布规律研究:硕士学位论文[D].成都:成都理工大学,2015.LI Chang-feng.Research on the tight gas reservoir characteristics and distribution regularities of member 3 of Xujiahe Formation in the northeastern Sichuan Basin:maseter's degree thesis[D].Chengdu:Chengdu University of Technology,2015.
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[3]王伟,王兴志,张帆,等.四川广安地区须家河组四段储层成岩作用与孔隙演化[J].世界地质,2010,29(1):96-103.WANG Wei,WANG Xing-zhi,ZHANG Fan,et al.Diagenesis and pore evolution of reservoir in the 4th Member of Xujiahe Formation in Guang'an area of Sichuan Province[J].Global Geology,2010,29(1):96-103.
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[6]单玄龙,罗洪浩,孙晓猛,等.四川盆地厚坝侏罗系大型油砂矿藏的成藏主控因素[J].吉林大学学报(地球科学版),2010,40(4):897-904.SAN Xuan-long,LUO Hong-hao,SUN Xiao-meng,et al.Main factors of Houba Jurassic large oil sands reservior in Sichuan Basin[J].Journal of Jilin Unviersity(Earth Science Edition),2010,40(4):897-904.
[7]范存辉,郭彤楼,王本强,等.四川盆地元坝中部地区须家河组储层裂缝发育特征及控制因素[J].油气地质与采收率,2013,20(5):52-54.FAN Cun-hui,GUO Tong-lou,WANG Ben-qiang,et al.Characteristics and controlling factors of reservoir fractures in Xujiahe Formation,central Yuanba of Sichuan basin[J].Petroleum Geology and Recovery Efficiency,2013,20(5):52-54.
[8]肖开华,李宏涛,贾爽.川东北元坝地区须三段钙屑砂岩储层特征及控气因素[J].石油与天然气地质,2014,35(5):654-660.XIAO Kai-hua,LI Hong-tao,JIA Shuang.Characteristics of calcarenaceous sandstone reservoirs and gas accumulation control factors of the 3rd Member of Xujiahe Formation in Yuanba area,Northeast Sichuan Basin[J].Oil&Gas Geology,2014,35(5):654-660.
[9]陈波,沈均均,郝景宇,等.川东北元坝地区须家河组石英砂岩沉积与储层特征[J].沉积学报,2012,30(1):92-100.CHEN Bo,SHEN Jun-jun,HAO Jing-yu,et al.Characteristics of quartz sandstones and its reservoir significance of Xujiahe Formation in Yuanba area,northeastern Sichuan Basin[J].Acta Sedimentologica Sinica,2012,30(1):92-100.
[10]李宏涛,史云清,肖开华,等.元坝气田须三段气藏层序沉积与储层特征[J].天然气工业,2016,36(9):20-34.LI Hong-tao,SHI Yun-qing,XIAO Kai-hua,et al.Controlling factors of the sediment thickness in member 3of Xujiahe Formation in Yuanba area[J].Natural Gas Industry,2016,36(9):20-34.
[11]王先明,单玄龙.低渗透油藏储层沉积微相研究:以松辽盆地乾安油田高台子油层Ⅶ砂组为例[J].世界地质,2002,21(3):251-257.WANG Xian-ming,SHAN Xuan-long.Study on microsedimnentary facies of low permeable reservoir:example fromⅦpay set in Qian'an oil field of Songliao Basin[J].World Geology,2002,21(3):251-257.
[12]单玄龙,胡金祥,任利军,等.松辽盆地乾安地区青山组三段沉积微相特征[J].地质学报,2008,82(1):65-71.SHAN Xuan-long,HU Jin-xiang,REN Li-jun,et al.Characteristics of sedimentary facies for the third member of Qingshankou Formation in the Qian'an area of the Songliao Basin[J].Acta Geologica Sinica,2008,82(1):65-71.
[13]曾焱,黎华继,周文雅,等.川西坳陷东坡中江气田沙溪庙组复杂“窄”河道致密砂岩气藏高产富集规律[J].天然气勘探与开发,2017,40(4):1-8.ZENG Yan,LI Hua-ji,ZHOU Wen-ya,et al.Highyield enrichment laws of Shaximiao Formation tight sandstone gas reservoir of complex“narrow”channel in Zhongjiang gas field,in the eastern slope of west Sichuan depression[J].Natural Gas Exploration and Development,2017,40(4):1-8.
[2]戴建全,吕正祥.川西上三叠统须家河组超致密砂岩储层评价[J].四川地质学报,2010,30(4):450-453.DAI Jian-quan,LYU Zheng-xiang.Assessment of hypercompact sandstone reservoirs of the upper Triassic Xujiahe Formation in west Sichuan[J].Acta Geologica Sichuan,2010,30(4):450-453.
[3]王伟,王兴志,张帆,等.四川广安地区须家河组四段储层成岩作用与孔隙演化[J].世界地质,2010,29(1):96-103.WANG Wei,WANG Xing-zhi,ZHANG Fan,et al.Diagenesis and pore evolution of reservoir in the 4th Member of Xujiahe Formation in Guang'an area of Sichuan Province[J].Global Geology,2010,29(1):96-103.
[4]程洪亮,胡华伟.川西低孔低渗储层参数评价[J].世界地质,2010,29(3):459-465.CHENG Hong-liang,HU Hua-wei.Parameter evaluation for low-porosity and low-permeability reservoirs in western Sichuan[J].Global Geology,2010,29(3):459-465.
[5]曾小英,张小青,钟玉梅.川西坳陷中段须家河组四段钙屑砂岩气层的成因[J].沉积学报,2007,25(6):896-902.ZENG Xiao-ying,ZHANG Xiao-qing,ZHONG Yu-mei.Origin of calcarenaceous sandstone gas formation of the4th member of Xujiahe Formation in the middle part of western Sichuan depression[J].Acta Sedimentologica Sinica,2007,25(6):896-902.
[6]单玄龙,罗洪浩,孙晓猛,等.四川盆地厚坝侏罗系大型油砂矿藏的成藏主控因素[J].吉林大学学报(地球科学版),2010,40(4):897-904.SAN Xuan-long,LUO Hong-hao,SUN Xiao-meng,et al.Main factors of Houba Jurassic large oil sands reservior in Sichuan Basin[J].Journal of Jilin Unviersity(Earth Science Edition),2010,40(4):897-904.
[7]范存辉,郭彤楼,王本强,等.四川盆地元坝中部地区须家河组储层裂缝发育特征及控制因素[J].油气地质与采收率,2013,20(5):52-54.FAN Cun-hui,GUO Tong-lou,WANG Ben-qiang,et al.Characteristics and controlling factors of reservoir fractures in Xujiahe Formation,central Yuanba of Sichuan basin[J].Petroleum Geology and Recovery Efficiency,2013,20(5):52-54.
[8]肖开华,李宏涛,贾爽.川东北元坝地区须三段钙屑砂岩储层特征及控气因素[J].石油与天然气地质,2014,35(5):654-660.XIAO Kai-hua,LI Hong-tao,JIA Shuang.Characteristics of calcarenaceous sandstone reservoirs and gas accumulation control factors of the 3rd Member of Xujiahe Formation in Yuanba area,Northeast Sichuan Basin[J].Oil&Gas Geology,2014,35(5):654-660.
[9]陈波,沈均均,郝景宇,等.川东北元坝地区须家河组石英砂岩沉积与储层特征[J].沉积学报,2012,30(1):92-100.CHEN Bo,SHEN Jun-jun,HAO Jing-yu,et al.Characteristics of quartz sandstones and its reservoir significance of Xujiahe Formation in Yuanba area,northeastern Sichuan Basin[J].Acta Sedimentologica Sinica,2012,30(1):92-100.
[10]李宏涛,史云清,肖开华,等.元坝气田须三段气藏层序沉积与储层特征[J].天然气工业,2016,36(9):20-34.LI Hong-tao,SHI Yun-qing,XIAO Kai-hua,et al.Controlling factors of the sediment thickness in member 3of Xujiahe Formation in Yuanba area[J].Natural Gas Industry,2016,36(9):20-34.
[11]王先明,单玄龙.低渗透油藏储层沉积微相研究:以松辽盆地乾安油田高台子油层Ⅶ砂组为例[J].世界地质,2002,21(3):251-257.WANG Xian-ming,SHAN Xuan-long.Study on microsedimnentary facies of low permeable reservoir:example fromⅦpay set in Qian'an oil field of Songliao Basin[J].World Geology,2002,21(3):251-257.
[12]单玄龙,胡金祥,任利军,等.松辽盆地乾安地区青山组三段沉积微相特征[J].地质学报,2008,82(1):65-71.SHAN Xuan-long,HU Jin-xiang,REN Li-jun,et al.Characteristics of sedimentary facies for the third member of Qingshankou Formation in the Qian'an area of the Songliao Basin[J].Acta Geologica Sinica,2008,82(1):65-71.
[13]曾焱,黎华继,周文雅,等.川西坳陷东坡中江气田沙溪庙组复杂“窄”河道致密砂岩气藏高产富集规律[J].天然气勘探与开发,2017,40(4):1-8.ZENG Yan,LI Hua-ji,ZHOU Wen-ya,et al.Highyield enrichment laws of Shaximiao Formation tight sandstone gas reservoir of complex“narrow”channel in Zhongjiang gas field,in the eastern slope of west Sichuan depression[J].Natural Gas Exploration and Development,2017,40(4):1-8.