再论川西坳陷须家河组二段气藏地震相特征
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摘要
川西坳陷深层须家河组二段蕴含着丰富的天然气资源,但储层致密化严重,成藏机理复杂,气藏以岩性和成岩圈闭为主,具有较大的隐蔽性,勘探难度大,有利目标预测困难。为此,通过分析层序地层格架、地震相及有利沉积相分布特征,结合裂缝预测技术,预测和描述油气富集带。研究结果表明,新场地区和大邑地区的须家河组二段河口坝及其下方的前缘砂体顶部为有利油气富集相带,是最有利的勘探目标区。根据预测结果,在德阳向斜部署了一口探井。
The 2nd member of Tertiary Xujiahe Formation is characterized by huge natural gas resource,serious densification degree of reservoir,complex pooling mechanism.Gas reservoir is mainly of lithology subtle trap,it is difficult for seismic exploration and beneficial target prediction.Therefore,by analyzing sequence stratigraphic framework,seismic facies and favorable sedimentary facies,combing with fracture prediction technology,the hydrocarbon bearing belt was fine described.The result shows that the mouth bar and underlying frontier sandbodies top of the 2nd member of Tertiary Xujiahe Formation in Xinchang area and Dayi area are favorable hy- drocarbon accumulation belt,which is the favorable exploration target. In terms of prediction result,one exploration well was deployed in Deyang Syncline.
The 2nd member of Tertiary Xujiahe Formation is characterized by huge natural gas resource,serious densification degree of reservoir,complex pooling mechanism.Gas reservoir is mainly of lithology subtle trap,it is difficult for seismic exploration and beneficial target prediction.Therefore,by analyzing sequence stratigraphic framework,seismic facies and favorable sedimentary facies,combing with fracture prediction technology,the hydrocarbon bearing belt was fine described.The result shows that the mouth bar and underlying frontier sandbodies top of the 2nd member of Tertiary Xujiahe Formation in Xinchang area and Dayi area are favorable hy- drocarbon accumulation belt,which is the favorable exploration target. In terms of prediction result,one exploration well was deployed in Deyang Syncline.
引文
[1]杨克明.川西坳陷油气资源现状及勘探潜力[J].石油与天然气地质,2003,24(4):322-331
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[4]吕正祥.川西孝泉构造上三叠统超致密储层演化特征[J].成都理工大学学报,2005,2(3):22-26
[5]安凤山,岳东明,唐立章,等.川西致密碎屑岩圈闭有效性分析[C]//王庭斌.石油与天然气地质文集[第八集].北京:地质出版社,1999:52-63
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[7]安凤山,王信,叶军.川西坳陷中段须家河组天然气勘探开发战略研讨[J].天然气工业,2005,25(5):1-5
[8]甘其刚,许多.川西深层致密碎屑岩气藏储层预测方法[J].石油物探,2008,47(6):593-597
[9]叶泰然,付顺,吕启彪.多波地震联合反演预测相对优质储层[J].石油与天然气地质,2009,30(3): 357-362
[10]甘其刚,高志平.宽方位AVA裂缝检测技术应用研究[J].天然气工业,2005,25(5):42-43
[11]张虹.川西致密碎屑岩气藏描述的物探方法技术[J].石油物探,2002,41(增刊):253-260
[12]池秋鄂,龚福华.层序地层学基础及应用[M].北京:石油工业出版社,2001:130
[13]苏锦义,刘殊.川西坳陷须家河组二段气藏地震相特征研究[J].石油物探,2008,47(2):167-171
[14]周文.裂缝性油气储集层评价方法[M].成都:四川科学出版社,1998:57-58
[15]钟嘉猷.实验构造地质学及其应用[M].北京:科学出版社,1998:201 -205
[2]杨克明.川西坳陷须家河组天然气成藏模式探讨[J].石油与天然气地质,2006,27(6):786-793
[3]唐立章,张贵生,张晓鹏.川西须家河组致密砂岩成藏主控因素[J].天然气工业,2004,24(9):5-7
[4]吕正祥.川西孝泉构造上三叠统超致密储层演化特征[J].成都理工大学学报,2005,2(3):22-26
[5]安凤山,岳东明,唐立章,等.川西致密碎屑岩圈闭有效性分析[C]//王庭斌.石油与天然气地质文集[第八集].北京:地质出版社,1999:52-63
[6]王金琪.早聚晚藏——川西坳陷天然气基本特征[J].天然气工业,2001;21(1):5-12
[7]安凤山,王信,叶军.川西坳陷中段须家河组天然气勘探开发战略研讨[J].天然气工业,2005,25(5):1-5
[8]甘其刚,许多.川西深层致密碎屑岩气藏储层预测方法[J].石油物探,2008,47(6):593-597
[9]叶泰然,付顺,吕启彪.多波地震联合反演预测相对优质储层[J].石油与天然气地质,2009,30(3): 357-362
[10]甘其刚,高志平.宽方位AVA裂缝检测技术应用研究[J].天然气工业,2005,25(5):42-43
[11]张虹.川西致密碎屑岩气藏描述的物探方法技术[J].石油物探,2002,41(增刊):253-260
[12]池秋鄂,龚福华.层序地层学基础及应用[M].北京:石油工业出版社,2001:130
[13]苏锦义,刘殊.川西坳陷须家河组二段气藏地震相特征研究[J].石油物探,2008,47(2):167-171
[14]周文.裂缝性油气储集层评价方法[M].成都:四川科学出版社,1998:57-58
[15]钟嘉猷.实验构造地质学及其应用[M].北京:科学出版社,1998:201 -205
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