应用多尺度资料研究川西大邑构造上三叠统须家河组成岩储集相
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摘要
利用丰富的岩心、测井和地震资料,以薄片镜下观察、岩心物性分析、测井曲线交会、地震速度反演等作为手段,对大邑构造上三叠统须家河组储集层成岩储集相的类型、成岩储集相的地质与测井响应特征、以及优质成岩储集相的演化序列与平面分布开展了半定量—定量研究,以期深化低渗透砂岩储集层的地质理论和指导该地区气田的高效开发。结果表明,研究区砂岩可划分为4类成岩储集相,即强破裂杂基溶孔—微孔—裂缝成岩储集相、强压实微孔成岩储集相、强压实致密成岩储集相和强胶结致密成岩储集相。采用声波、密度、电阻率和自然伽马曲线交会的方法可有效识别各类成岩储集相。强破裂杂基溶孔—微孔—裂缝成岩储集相物性最好,为优质成岩储集相,其岩石类型以石英砂岩为主,经历了强烈的压实作用和破裂作用,孔隙度3%～8%,渗透率大于0.5×10-3μm2,主要发育在构造高部位的分流河道和水下分流河道砂体中,沉积因素和构造因素对其平面分布起到了重要控制作用。
By the full use of cores,well log and seismic data,the types of diagenetic reservoir facies, geological and logging response characteristics of diagenetic reservoir facies,and the diagenetic sequence and horizontal distribution of high-quality diagenetic reservoir facies of the Upper Triassic Xujiahe Formation in Dayi Structure are semiquantitatively-quantitatively researched through several methods,such as slice observation under microscope,core physical analysis,well curve intersection,seismic velocity inversion and so on.The aims of research are to deepen geological theories of low permeability sandstone reservoir and indicate effective development of gas field in this area.The results show that diagenetic reservoir facies of sandstone in the research area can be divided into 4 types,namely,the dissolution pore-micropore-fracture diagenetic reservoir facies with strong fracture,the micropore diagenetic reservoir facies with strong compaction,the tight diagenetic reservoir facies with strong compaction and the tight diagenetic reservoir facies with strong cementation.The curve cross plots of acoustic,density,resistivity and gamma are used to effectively identify different diagenetic reservoir facies.Among 4 types of diagenetic reservoir facies,the dissolution pore-micropore-fracture diagenetic reservoir facies are the high-quality diagenetic reservoir facies,whose porosity is between 3% and 8%,permeability larger than 05×10-3 μm2.The high-quality diagenetic reservoir facies mainly develops on distributary channels and subaqueous distributary channels of the high position of structure belt and belongs to quartz sandstone sufferring strong compaction and fracture.The distribution of them are controlled by sedimentary factors and structure factors.
By the full use of cores,well log and seismic data,the types of diagenetic reservoir facies, geological and logging response characteristics of diagenetic reservoir facies,and the diagenetic sequence and horizontal distribution of high-quality diagenetic reservoir facies of the Upper Triassic Xujiahe Formation in Dayi Structure are semiquantitatively-quantitatively researched through several methods,such as slice observation under microscope,core physical analysis,well curve intersection,seismic velocity inversion and so on.The aims of research are to deepen geological theories of low permeability sandstone reservoir and indicate effective development of gas field in this area.The results show that diagenetic reservoir facies of sandstone in the research area can be divided into 4 types,namely,the dissolution pore-micropore-fracture diagenetic reservoir facies with strong fracture,the micropore diagenetic reservoir facies with strong compaction,the tight diagenetic reservoir facies with strong compaction and the tight diagenetic reservoir facies with strong cementation.The curve cross plots of acoustic,density,resistivity and gamma are used to effectively identify different diagenetic reservoir facies.Among 4 types of diagenetic reservoir facies,the dissolution pore-micropore-fracture diagenetic reservoir facies are the high-quality diagenetic reservoir facies,whose porosity is between 3% and 8%,permeability larger than 05×10-3 μm2.The high-quality diagenetic reservoir facies mainly develops on distributary channels and subaqueous distributary channels of the high position of structure belt and belongs to quartz sandstone sufferring strong compaction and fracture.The distribution of them are controlled by sedimentary factors and structure factors.
引文
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孟元林,李娜,黄文彪,等.2008.辽河坳陷西部斜坡带南段新生界成岩相分析与优质储集层预测[J].古地理学报,10(1):33-41.
宋成辉,李晓,陈剑,等.2004.储集层成岩—储集相划分方法[J].天然气工业,24(10):27-29.
王琪,禚喜准,陈国俊,等.2005.鄂尔多斯西部长6砂岩成岩演化与优质储集层[J].石油学报,26(5):17-23.
魏立花,郭精义,杨占龙,等.2006.测井约束岩性反演关键技术分析[J].天然气地球科学,17(5):731-735.
吴胜和.2009.储集层表征与建模[M].北京:石油工业出版社,215-217.
熊琦华,王志章,吴胜和,等.2010.现代油藏地质学理论与技术篇[M].北京:科学出版社,224-231.
徐樟有,魏萍,熊琦华.1995.枣南油田孔店组成岩作用及孔隙演化模式[J].石油大学学报(自然科学版),19(1):7-12.
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杨晓萍,赵文智,邹才能,等.2007.低渗透储集层成因机理及优质储集层形成与分布[J].石油学报,28(4):57-61.
应凤祥,何东博,龙玉梅,等.2003.碎屑岩石成岩阶段划分(SY/T5477-2003)[M].北京:石油工业出版社,1-14.
张一伟,熊琦华,吴胜和.1997.陆相油藏描述[M].北京:石油工业出版社,103-117.
邹才能,侯连华,匡立春,等.2007.准噶尔盆地西缘二叠—三叠系扇控成岩—储集相成因机理[J].地质科学,42(3):587-601.
Ehrenberg S N.1993.Preservation of anomalously high porosity in deeplyburied sandstones by grain-coating chlorite:Examples from the Nor-wegian continental shelf[J].AAPG Bulletin,77(7):1260-1286.
Hearn C L,Ebanks W J Jr,Tyer S,et al.1984.Geological factors influen-cing reservoir performance of the Hartzog Dra field,Wyoming[J].Journal of Petroleum Technology,36:1335-1344.
胡明毅,李士祥,魏国齐,等.2008.川西前陆盆地上三叠统须家河组沉积体系及演化特征[J].石油天然气学报,37(2):5-10.
黄述旺,窦齐丰.2002.吉林四五家子油田下白垩统泉二段储集层成岩—储集相及储集空间演化[J].地球科学——中国地质大学学报,27(6):723-728.
季玉新,陈娟,谢雄举.2004.测井曲线精细处理解释技术在复杂储集层预测中的应用[J].石油物探,43(2):139-144.
蒋凌志,顾家裕,郭彬程.2004.中国含油气盆地碎屑岩低渗透储集层的特征及形成机理[J].沉积学报,22(1):13-18.
李海燕,彭仕宓.2007.苏里格气田低渗透储集层成岩—储集相特征[J].石油学报,28(3):100-104.
李海燕,彭仕宓,黄述旺,等.2004.山东渤南油田古近系沙河街组沙二段及沙三段低渗透储集层成岩—储集相[J].古地理学报,6(4):503-513.
刘金华,张世奇,孙耀庭,等.2007.川西前陆盆地上三叠统须家河组地层的划分对比及沉积演化[J].地质学杂志,37(2):191-196.
孟元林,李娜,黄文彪,等.2008.辽河坳陷西部斜坡带南段新生界成岩相分析与优质储集层预测[J].古地理学报,10(1):33-41.
宋成辉,李晓,陈剑,等.2004.储集层成岩—储集相划分方法[J].天然气工业,24(10):27-29.
王琪,禚喜准,陈国俊,等.2005.鄂尔多斯西部长6砂岩成岩演化与优质储集层[J].石油学报,26(5):17-23.
魏立花,郭精义,杨占龙,等.2006.测井约束岩性反演关键技术分析[J].天然气地球科学,17(5):731-735.
吴胜和.2009.储集层表征与建模[M].北京:石油工业出版社,215-217.
熊琦华,王志章,吴胜和,等.2010.现代油藏地质学理论与技术篇[M].北京:科学出版社,224-231.
徐樟有,魏萍,熊琦华.1995.枣南油田孔店组成岩作用及孔隙演化模式[J].石油大学学报(自然科学版),19(1):7-12.
徐樟有,吴胜和,张小青,等.2008.川西坳陷新场气田上三叠统须家河组须四段和须二段储集层成岩—储集相及其成岩演化序列[J].古地理学报,10(5):447-458.
杨晓萍,赵文智,邹才能,等.2007.低渗透储集层成因机理及优质储集层形成与分布[J].石油学报,28(4):57-61.
应凤祥,何东博,龙玉梅,等.2003.碎屑岩石成岩阶段划分(SY/T5477-2003)[M].北京:石油工业出版社,1-14.
张一伟,熊琦华,吴胜和.1997.陆相油藏描述[M].北京:石油工业出版社,103-117.
邹才能,侯连华,匡立春,等.2007.准噶尔盆地西缘二叠—三叠系扇控成岩—储集相成因机理[J].地质科学,42(3):587-601.
Ehrenberg S N.1993.Preservation of anomalously high porosity in deeplyburied sandstones by grain-coating chlorite:Examples from the Nor-wegian continental shelf[J].AAPG Bulletin,77(7):1260-1286.
Hearn C L,Ebanks W J Jr,Tyer S,et al.1984.Geological factors influen-cing reservoir performance of the Hartzog Dra field,Wyoming[J].Journal of Petroleum Technology,36:1335-1344.
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