川南嘉陵江组隐蔽油气藏勘探的启示
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摘要
为探讨勘探开发实践中隐蔽油气藏的表征和本质,启发类似油气藏的勘探,以四川盆地南部沈17井嘉二~1亚段隐蔽油气藏为例,从构造-沉积格架、储层盖层组合特征着手,结合钻探历程、测井、试油、生产等现场资料,采用"表象—本质—表象"的思路方法进行分析,认为该油气藏具有特征性隐蔽和技术性隐蔽双重隐蔽性的表征,储层隐蔽性强是根源。研究表明,由于双重隐蔽性,嘉陵江组油气探明率相对较低,下步勘探潜力较大。受此启发,针对该类油气藏的勘探开发提出建议:一是随着地质理论、物探技术和勘探实践的发展,早期勘探程度相对较低的区块或层系,仍值得深化研究和勘探;二是持续提升钻井储层保护技术,是保障勘探发现的重要途径;三是整装油气藏势必会伴生具较大储量的、分散的隐蔽油气藏,开展老井复试,利用"过路井"对隐蔽性强的层系作兼探,兼顾此类"小气田、高产井"隐蔽性油气藏的勘探,对增储上产、提高采收率具有现实意义。
The Jialingjiang-2~1 subtle reservoir in southern Sichuan Basin is studied to explore the characterization and essence of subtle reservoir in exploration and development practices and inspire similar reservoir exploration.The "representation-essence-representation" method is used in the analysis based on the tectonic-sedimentary framework and reservoir-caprock combination pattern. It is considered that the subtle reservoir is characterized by both characteristic and technical concealments,which mainly results from the strong reservoir concealment. Research indicates that there is a relatively low hydrocarbon proven rate in the Jialingjiang Formation due to the dual concealments. Several suggestions were made for the subtle reservoir exploration and development according to this inspiration. First,with the development of geological theory,geophysical technique and exploration practice,the block or stratum with relatively low early exploration level is still worthy of further research and exploration. Second,continuous improvement of reservoir protection technology in drilling operation is an important way to ensure exploration breakthrough. Third,large-scale hydrocarbon reservoir is bound to be accompanied by scattered subtle reservoirs with relatively large reserves. Retests pf both old well and "crossing-well" can be used in the combined exploration of stratum series with strong concealment. Consideration of the "small-scale gasfield,high-production well" subtle reservoir exploration is of practical significance for reserve and recovery enehancement.
The Jialingjiang-2~1 subtle reservoir in southern Sichuan Basin is studied to explore the characterization and essence of subtle reservoir in exploration and development practices and inspire similar reservoir exploration.The "representation-essence-representation" method is used in the analysis based on the tectonic-sedimentary framework and reservoir-caprock combination pattern. It is considered that the subtle reservoir is characterized by both characteristic and technical concealments,which mainly results from the strong reservoir concealment. Research indicates that there is a relatively low hydrocarbon proven rate in the Jialingjiang Formation due to the dual concealments. Several suggestions were made for the subtle reservoir exploration and development according to this inspiration. First,with the development of geological theory,geophysical technique and exploration practice,the block or stratum with relatively low early exploration level is still worthy of further research and exploration. Second,continuous improvement of reservoir protection technology in drilling operation is an important way to ensure exploration breakthrough. Third,large-scale hydrocarbon reservoir is bound to be accompanied by scattered subtle reservoirs with relatively large reserves. Retests pf both old well and "crossing-well" can be used in the combined exploration of stratum series with strong concealment. Consideration of the "small-scale gasfield,high-production well" subtle reservoir exploration is of practical significance for reserve and recovery enehancement.
引文
[1]庞雄奇,陈冬霞,张俊.隐蔽油气藏成藏机理研究现状及展望[J].海相油气地质,2007,12(1):56-62.
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[6]张善文.济阳坳陷第三系隐蔽油气藏勘探理论与实践[J].石油与天然气地质,2006,27(6):731-730.
[7]周心怀,王德英,张新涛.渤海海域石臼坨凸起两个亿吨级隐蔽油气藏勘探实践与启示[J].中国石油勘探,2016,21(4):30-37.
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[9]赵永刚,陈景山,雷卞军,等.川中-川南过渡带嘉二气藏成藏条件分析及有利区块评价[J].大庆石油地质与开发,2006,25(5):17-21.
[10]李延钧,李其荣,杨坚,等.泸州古隆起嘉陵江组油气运聚规律与成藏[J].石油勘探与开发,2005,32(5):20-24.
[11]李其荣,王廷栋,李延钧,等.泸州古隆起嘉陵江组油气成藏期的确定[J].天然气工业,2005,25(7),7-13.
[12]张廷山,陈晓慧,姜照勇,等.泸州古隆起对贵州赤水地区早、中三叠世沉积环境和相带展布的控制[J].沉积学报,2008,26(4):583-592.
[13]朱其,李国荣,乔占峰,等.四川盆地泸州古隆起嘉陵江组储层特征研究[J].四川地质学报,2008,28(1):30-34.
[14]乔占峰,李国蓉,李弢,等.泸州古隆起地区嘉陵江组层序特征及其对碳酸盐岩储层的控制[J].沉积学报,2008,26(1):92-99.
[15]李弢,陈克勇.川南嘉陵江组天然气成藏类型及控制因素探讨[J].物探化探计算技术,2008,30(3):206-211.
[16]罗洋,杨扬,邓飞涌,等.泸州古隆起嘉陵江组油气成藏规律及有利勘探方向[J].天然气工业,2013,33(增刊1):46-50.
[2]郝芳,邹华耀,方勇.隐蔽油气藏研究的难点和前沿[J].地学前缘,2005,12(4):481-488.
[3]HALBOUTY M T.The deliberate search for the subtle trap[M].Oklahom:The American Association of Petroleum Geologists Tulsa,1982:1-8.
[4]胡见义,徐树宝,刘淑萱,等.非构造油气藏[M].北京:石油工业出版社,1986:69-98.
[5]庞雄奇,陈冬霞,张俊.隐蔽油气藏的概念与分类及其在实际应用中需要注意的问题[J].岩性油气藏,2007,19(1):1-8.
[6]张善文.济阳坳陷第三系隐蔽油气藏勘探理论与实践[J].石油与天然气地质,2006,27(6):731-730.
[7]周心怀,王德英,张新涛.渤海海域石臼坨凸起两个亿吨级隐蔽油气藏勘探实践与启示[J].中国石油勘探,2016,21(4):30-37.
[8]张健,张奇.四川盆地油气勘探---历史回顾及展望[J].天然气工业,2002,22(5):3-7.
[9]赵永刚,陈景山,雷卞军,等.川中-川南过渡带嘉二气藏成藏条件分析及有利区块评价[J].大庆石油地质与开发,2006,25(5):17-21.
[10]李延钧,李其荣,杨坚,等.泸州古隆起嘉陵江组油气运聚规律与成藏[J].石油勘探与开发,2005,32(5):20-24.
[11]李其荣,王廷栋,李延钧,等.泸州古隆起嘉陵江组油气成藏期的确定[J].天然气工业,2005,25(7),7-13.
[12]张廷山,陈晓慧,姜照勇,等.泸州古隆起对贵州赤水地区早、中三叠世沉积环境和相带展布的控制[J].沉积学报,2008,26(4):583-592.
[13]朱其,李国荣,乔占峰,等.四川盆地泸州古隆起嘉陵江组储层特征研究[J].四川地质学报,2008,28(1):30-34.
[14]乔占峰,李国蓉,李弢,等.泸州古隆起地区嘉陵江组层序特征及其对碳酸盐岩储层的控制[J].沉积学报,2008,26(1):92-99.
[15]李弢,陈克勇.川南嘉陵江组天然气成藏类型及控制因素探讨[J].物探化探计算技术,2008,30(3):206-211.
[16]罗洋,杨扬,邓飞涌,等.泸州古隆起嘉陵江组油气成藏规律及有利勘探方向[J].天然气工业,2013,33(增刊1):46-50.