鄂尔多斯盆地陇东地区长4+5油层组致密砂岩储层成岩作用及成岩相
|
摘要
运用铸体薄片鉴定、扫描电镜、X-衍射及高压压汞等测试方法,系统分析了鄂尔多斯盆地陇东地区长4+5油层组砂岩储层的成岩作用特征及其对储层物性的影响,进而对储层成岩相特征及有利成岩相的分布进行了研究。结果表明:研究区长4+5储层成岩阶段总体处于中成岩阶段A-B期,压实作用与碳酸盐胶结作用造成原始孔隙的大量损失,使储集层物性变差;早期绿泥石薄膜的发育有利于原生孔隙的保存;溶蚀作用使物性得到明显改善。根据成岩作用对物性的影响,划分出绿泥石薄膜-粒间孔相、高岭石胶结-长石溶蚀相、伊利石胶结-长石溶蚀相、碳酸盐胶结相、硅质-伊利石胶结相等5种成岩相带,优质储集层与成岩相密切相关,绿泥石薄膜-粒间孔成岩相的砂体物性、含油性最好,是研究区长4+5储集层石油最富集的成岩相带。
Based on thin sections,SEM,X-ray diffraction,mercury injection,this paper analyzed the diagenesis and its impact on Chang4 + 5( the 4thand 5thMember of the Yanchang Fm) oil layers in Longdong area,Ordos Basin. Based on the analysis results,we studied the characteristics of diagenetic facies and the distribution of favorable facies. The Chang4 + 5 oil layers is at the mid-diagenetic A-B stage,and the early compaction and carbonate cementation resulted in loss of great numbers of primary pores,resulting in poor reservoir quality. However,the early chlorite thin film was favorable for the protection of primary pores and dissolution improved reservoir quality. According to the impact of the diagenesis on reservoir quality,five types of diagenetic facies were identified,namely chlorite thin film-residual intergranular pore facies, kaolinite cementation-feldspar dissolution facies,illite cementation-feldspar dissolution facies,carbonate cementation facies and siliceous-illite cementation facies. High quality reservoirs are closely related to the diagenetic facies,and the chlorite thin film-residual intergranular pore diagenetic facies is the best in reservoir physical property and petroliferous property,thus is the most favorable diagenetic facies for oil enrichment in this area.
Based on thin sections,SEM,X-ray diffraction,mercury injection,this paper analyzed the diagenesis and its impact on Chang4 + 5( the 4thand 5thMember of the Yanchang Fm) oil layers in Longdong area,Ordos Basin. Based on the analysis results,we studied the characteristics of diagenetic facies and the distribution of favorable facies. The Chang4 + 5 oil layers is at the mid-diagenetic A-B stage,and the early compaction and carbonate cementation resulted in loss of great numbers of primary pores,resulting in poor reservoir quality. However,the early chlorite thin film was favorable for the protection of primary pores and dissolution improved reservoir quality. According to the impact of the diagenesis on reservoir quality,five types of diagenetic facies were identified,namely chlorite thin film-residual intergranular pore facies, kaolinite cementation-feldspar dissolution facies,illite cementation-feldspar dissolution facies,carbonate cementation facies and siliceous-illite cementation facies. High quality reservoirs are closely related to the diagenetic facies,and the chlorite thin film-residual intergranular pore diagenetic facies is the best in reservoir physical property and petroliferous property,thus is the most favorable diagenetic facies for oil enrichment in this area.
引文
[1]Ceriani A,Giulio A D,Goldstein R H,et al.Diagenesis associated with cooling during burial:an example from Lover Cretaceous reservoir sandstones[J].AAPG Bulletin,2002,86(9):1573-1591.
[2]付晶,吴胜和,付金华,等.鄂尔多斯盆地陇东地区延长组储层定量成岩相研究[J].地学前缘,2013,20(3):86-97.Fu Jing,Wu Shenghe,Fu Jinhua,et al.Research on quantitative diagenetic facies of the Yanchang Formation in Longdong Area,Ordos Basin[J].Earth Science Frontiers,2013,20(3):86-97.
[3]陈朝兵,朱玉双,陈新晶,等.鄂尔多斯盆地姬塬地区延长组长82储层沉积成岩作用[J].石油与天然气地质,2013,34(5):685-693.Chen Zhaobing,Zhu Yushuang,Chen Xinjing,et al.Sedimentation and diagenesis of Chang 82 reservoir in the Yanchang Formation in Jiyuan region,Ordos Basin[J].Oil&Gas Geology,2013,34(5):685-693.
[4]张纪智,陈世加,肖艳,等.鄂尔多斯盆地华庆地区长8致密砂岩储层特征及其成因[J].石油与天然气地质,2013,34(5):679-684.Zhang Jizhi,Chen Shijia,Xiao Yan,et al.Characteristics of the Chang8 tight sandstone reservoirs.and their genesis inHuaqing area,Ordos Basin[J].Oil&Gas Geology,2013,34(5):679-684.
[5]邹才能,陶士振,周慧,等.成岩相的形成、分类与定量评价方法[J].石油勘探与开发,2008,35(5):526-540.Zou Caineng,Tao Shizhen,Zhou Hui,et al.Genesis,classification and evaluation method of diagenetic facies[J].Petroleum Exploration and Development,2008,35(5):526-540.
[6]朱国华.碎屑岩储集层孔隙的形成、演化和预测[J].沉积学报,1992,10(3):114-132.Zhu Guohua.Origin and evolution and prediction of porosity in clastic reservoir rocks[J].Acta Sedimentologica Sinica,1992,10(3):114-132.
[7]陈彦华,刘莺.成岩相-储集体预测的新途径[J].石油实验地质,1994,16(3):274-281.Chen Yanhua,Liu Ying.Diagenetic facies—a new approach to the prediction of reservoir rocks[J].Experimental Petroleum Geology,1994,16(3):274-281.
[8]邹才能,陶士振,袁选俊,等.连续型油气藏形成条件与分布特征[J].石油学报,2009,30(3):324-331.Zou Caineng Tao Shizhen Yuan Xuanjun,et al.The formation conditions and distribution characteristics of continuous petroleum accumulations[J].Acta Petrolei Sinica,2009,30(3):324-331.
[9]王峰,田景春,范立勇,等.鄂尔多斯盆地三叠系延长组沉积充填演化及其对印支构造运动的响应[J].天然气地球科学,2010,21(6):882-889.Wang Feng,Tian Jingchun,Fan Li Yong,et al.Evolution of sedimentary fillings in triassic Yanchang Formation and its response to Indosinian movement in Ordos Basin[J].Natural Gas Geoscience,2010,21(6):882-889.
[10]王峰,王多云,高明书,等.陕甘宁盆地姬塬地区三叠系延长组三角洲前缘沉积微相组合及特征[J].沉积学报,2005,23(2):218-224.Wang Feng,WangDuoyun,Gao Mingshu,et al.The m icrofacies combination and characteristics of delta front in Yanchang Formation(Triassic)of Jiyuan Area Shaanxi-Gansu-Ningxia Basin[J].Acta Sedimentologica Sinica,2005,23(2):218-224.
[11]姚泾利,邓秀芹,赵彦德,等.鄂尔多斯盆地延长组致密油特征[J].石油勘探与开发,2013,40(2):150-158.Yao Jingli,Deng Xiuqin,Zhao Yande,et al.Characteristics of tight oil in Triassic Yanchang Formation,Ordos Basin[J].Petroleum Exploration and Development,2013,40(2):150-158.
[12]楚美娟,郭正权,齐亚林,等.鄂尔多斯盆地延长组长8储层定量化成岩作用及成岩相分析[J].天然气地球科学,2013,24(3):477-484.Chu Meijuan,Guo Zhengquan,Qi Yalin,et al.Quantitative diagenesis and diagenetic facies analysis on Chang 8 Reservoir of Yanchang Formation in Ordos Basin[J].Natural Gas Geoscience,2013,24(3):477-484.
[13]刘伟,窦齐丰,黄述旺,等.成岩作用的定量表征与成岩储集相研究——以科尔沁油田交2断块区九佛堂组(J3jf)下段为例[J].中国矿业大学学报,2002,31(5):399-405.Liu Wei,DouQifeng,Huang Shuwang,et al.Quantitative characterization of diagenesis and diagenesis reservoir facies——the case study of lower member of J3jf of Jiao 2 block in Kerqin oilfield[J].Journal of China University of Mining&Technology,2002,31(5):399-405.
[14]张瑞,王琪,姚泾利,等.鄂尔多斯盆地延长世湖盆中部长6段储层成岩特征[J].天然气地球科学,2010,21(6):890-896.Zhang Rui,Wang Qi,Yao Jingli,et al.Diagenetic characteristics and pore evolution from high-quality reservoirs of Yanchang Formation in the Middle of Ordos Basin[J].Natural Gas Geoscience,2010,21(6):890-896.
[15]程晓玲.粘土矿物转化与储层孔隙演化的规律性研究——以苏北盆地台兴油田阜三段储层为例[J].大庆石油地质与开发,2006,25(1):43-45.Cheng XiaoLing.Laws of clay mineral transformation and reservoir porosity evolution:a case study of FuⅢMember of Taixing Oil Field in Subei Basin[J].Petroleum Geology&Oilfield Development in Daqing,2006,25(1):43-45.
[16]张志飞,王启明.陕北鄂尔多斯盆地三叠系泥岩中粘土矿物在埋藏变质过程中的转化[J].中国科学(B辑),1992,(7):759-767.Zhang Zhifei,Wang Qiming.The transformation of clay minerals in mudstone in the process of burial metamorphism of Triassic in the ordos basin in northern shaanxi[J].Science in China,Series B,1992,(7):759-767.
[17]Scherer M.Parameters influencing porosity in sandstone:a model for sandstone porosity prediction[J].AAPG Bullitin,1987,71(5):485-491.
[18]Beard D C,Weyl P K.Influence of texture on porosity and permeability of unconsolidated Sand[J].AAPG Bulletin,1973,57(2):349-369.
[19]吴小斌,侯加根,孙卫.特低渗砂岩储层微观结构及孔隙演化定量分析[J].中南大学学报(自然科学版),2011,42(11):3438-3446.Wu XiaoBin,Hou Jiagen,Sun Wei.Microstructure characteristics and quantitative analysis on porosity evolution of ultra-low sandstone reservoir[J].Journal of Central South University(Science and Technology),2011,42(11):3438-3446.
[20]程新虎,柳益群,陈魏巍,等.鄂尔多斯盆地张家山区长8储集层成岩作用及有利相带[J].新疆石油地质,2012,33(3):316-320.Cheng Xinhu,Liu Yiqun,Chen Weiwei,et al.Diagenesis and favorable facies of Chang-8 reservoir in Zhangjiashan Area in Ordos Basin[J].Xinjiang Petroleum Geology,2012,33(3):316-320.
[2]付晶,吴胜和,付金华,等.鄂尔多斯盆地陇东地区延长组储层定量成岩相研究[J].地学前缘,2013,20(3):86-97.Fu Jing,Wu Shenghe,Fu Jinhua,et al.Research on quantitative diagenetic facies of the Yanchang Formation in Longdong Area,Ordos Basin[J].Earth Science Frontiers,2013,20(3):86-97.
[3]陈朝兵,朱玉双,陈新晶,等.鄂尔多斯盆地姬塬地区延长组长82储层沉积成岩作用[J].石油与天然气地质,2013,34(5):685-693.Chen Zhaobing,Zhu Yushuang,Chen Xinjing,et al.Sedimentation and diagenesis of Chang 82 reservoir in the Yanchang Formation in Jiyuan region,Ordos Basin[J].Oil&Gas Geology,2013,34(5):685-693.
[4]张纪智,陈世加,肖艳,等.鄂尔多斯盆地华庆地区长8致密砂岩储层特征及其成因[J].石油与天然气地质,2013,34(5):679-684.Zhang Jizhi,Chen Shijia,Xiao Yan,et al.Characteristics of the Chang8 tight sandstone reservoirs.and their genesis inHuaqing area,Ordos Basin[J].Oil&Gas Geology,2013,34(5):679-684.
[5]邹才能,陶士振,周慧,等.成岩相的形成、分类与定量评价方法[J].石油勘探与开发,2008,35(5):526-540.Zou Caineng,Tao Shizhen,Zhou Hui,et al.Genesis,classification and evaluation method of diagenetic facies[J].Petroleum Exploration and Development,2008,35(5):526-540.
[6]朱国华.碎屑岩储集层孔隙的形成、演化和预测[J].沉积学报,1992,10(3):114-132.Zhu Guohua.Origin and evolution and prediction of porosity in clastic reservoir rocks[J].Acta Sedimentologica Sinica,1992,10(3):114-132.
[7]陈彦华,刘莺.成岩相-储集体预测的新途径[J].石油实验地质,1994,16(3):274-281.Chen Yanhua,Liu Ying.Diagenetic facies—a new approach to the prediction of reservoir rocks[J].Experimental Petroleum Geology,1994,16(3):274-281.
[8]邹才能,陶士振,袁选俊,等.连续型油气藏形成条件与分布特征[J].石油学报,2009,30(3):324-331.Zou Caineng Tao Shizhen Yuan Xuanjun,et al.The formation conditions and distribution characteristics of continuous petroleum accumulations[J].Acta Petrolei Sinica,2009,30(3):324-331.
[9]王峰,田景春,范立勇,等.鄂尔多斯盆地三叠系延长组沉积充填演化及其对印支构造运动的响应[J].天然气地球科学,2010,21(6):882-889.Wang Feng,Tian Jingchun,Fan Li Yong,et al.Evolution of sedimentary fillings in triassic Yanchang Formation and its response to Indosinian movement in Ordos Basin[J].Natural Gas Geoscience,2010,21(6):882-889.
[10]王峰,王多云,高明书,等.陕甘宁盆地姬塬地区三叠系延长组三角洲前缘沉积微相组合及特征[J].沉积学报,2005,23(2):218-224.Wang Feng,WangDuoyun,Gao Mingshu,et al.The m icrofacies combination and characteristics of delta front in Yanchang Formation(Triassic)of Jiyuan Area Shaanxi-Gansu-Ningxia Basin[J].Acta Sedimentologica Sinica,2005,23(2):218-224.
[11]姚泾利,邓秀芹,赵彦德,等.鄂尔多斯盆地延长组致密油特征[J].石油勘探与开发,2013,40(2):150-158.Yao Jingli,Deng Xiuqin,Zhao Yande,et al.Characteristics of tight oil in Triassic Yanchang Formation,Ordos Basin[J].Petroleum Exploration and Development,2013,40(2):150-158.
[12]楚美娟,郭正权,齐亚林,等.鄂尔多斯盆地延长组长8储层定量化成岩作用及成岩相分析[J].天然气地球科学,2013,24(3):477-484.Chu Meijuan,Guo Zhengquan,Qi Yalin,et al.Quantitative diagenesis and diagenetic facies analysis on Chang 8 Reservoir of Yanchang Formation in Ordos Basin[J].Natural Gas Geoscience,2013,24(3):477-484.
[13]刘伟,窦齐丰,黄述旺,等.成岩作用的定量表征与成岩储集相研究——以科尔沁油田交2断块区九佛堂组(J3jf)下段为例[J].中国矿业大学学报,2002,31(5):399-405.Liu Wei,DouQifeng,Huang Shuwang,et al.Quantitative characterization of diagenesis and diagenesis reservoir facies——the case study of lower member of J3jf of Jiao 2 block in Kerqin oilfield[J].Journal of China University of Mining&Technology,2002,31(5):399-405.
[14]张瑞,王琪,姚泾利,等.鄂尔多斯盆地延长世湖盆中部长6段储层成岩特征[J].天然气地球科学,2010,21(6):890-896.Zhang Rui,Wang Qi,Yao Jingli,et al.Diagenetic characteristics and pore evolution from high-quality reservoirs of Yanchang Formation in the Middle of Ordos Basin[J].Natural Gas Geoscience,2010,21(6):890-896.
[15]程晓玲.粘土矿物转化与储层孔隙演化的规律性研究——以苏北盆地台兴油田阜三段储层为例[J].大庆石油地质与开发,2006,25(1):43-45.Cheng XiaoLing.Laws of clay mineral transformation and reservoir porosity evolution:a case study of FuⅢMember of Taixing Oil Field in Subei Basin[J].Petroleum Geology&Oilfield Development in Daqing,2006,25(1):43-45.
[16]张志飞,王启明.陕北鄂尔多斯盆地三叠系泥岩中粘土矿物在埋藏变质过程中的转化[J].中国科学(B辑),1992,(7):759-767.Zhang Zhifei,Wang Qiming.The transformation of clay minerals in mudstone in the process of burial metamorphism of Triassic in the ordos basin in northern shaanxi[J].Science in China,Series B,1992,(7):759-767.
[17]Scherer M.Parameters influencing porosity in sandstone:a model for sandstone porosity prediction[J].AAPG Bullitin,1987,71(5):485-491.
[18]Beard D C,Weyl P K.Influence of texture on porosity and permeability of unconsolidated Sand[J].AAPG Bulletin,1973,57(2):349-369.
[19]吴小斌,侯加根,孙卫.特低渗砂岩储层微观结构及孔隙演化定量分析[J].中南大学学报(自然科学版),2011,42(11):3438-3446.Wu XiaoBin,Hou Jiagen,Sun Wei.Microstructure characteristics and quantitative analysis on porosity evolution of ultra-low sandstone reservoir[J].Journal of Central South University(Science and Technology),2011,42(11):3438-3446.
[20]程新虎,柳益群,陈魏巍,等.鄂尔多斯盆地张家山区长8储集层成岩作用及有利相带[J].新疆石油地质,2012,33(3):316-320.Cheng Xinhu,Liu Yiqun,Chen Weiwei,et al.Diagenesis and favorable facies of Chang-8 reservoir in Zhangjiashan Area in Ordos Basin[J].Xinjiang Petroleum Geology,2012,33(3):316-320.