AVO技术在YB地区礁滩储层预测中的应用
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摘要
通过对YB地区二叠系长兴组储层进行研究,确定该区礁滩储层地震反射为波谷,对区内已知井储层段进行AVO异常特征分析,认为该区含气层具有Ⅳ类AVO异常响应特征;含水层或非储层具有Ⅲ类AVO异常响应特征。利用AVO梯度G值异常对该区礁滩储层进行反演,预测了YB地区长兴组储层的有利含气范围,并进一步用G值剖面对正钻井的储层段进行预测。实践证明预测结果和测井资料相吻合,AVO技术可应用于礁滩储层含油气预测。
By studying Permian Changxing Formation reservoirs in YB area, it is determined that the seismic reflections ofreef-bank reservoirs in the area are wave troughs. AVO anomaly characteristics are analyzed for the reservoirs intervals of knownwells. It is believed that the gas-bearing formation has type lV of AVO anomaly response characteristics, while the aquifer and nonreservoirs have type Ⅲ. The inversion is carried out for reef-bank reservoirs using the AVO gradient and G-value anomaly. The favorable gas-bearing range of Changxing Formation is predicted, Reservoirs intervals of drilling wells are also predicted by further G-value section. Practice has proved that the predicted result corresponds to the logging data, AVO technology can be applied to the oiland gas prediction of the reservoirs.
By studying Permian Changxing Formation reservoirs in YB area, it is determined that the seismic reflections ofreef-bank reservoirs in the area are wave troughs. AVO anomaly characteristics are analyzed for the reservoirs intervals of knownwells. It is believed that the gas-bearing formation has type lV of AVO anomaly response characteristics, while the aquifer and nonreservoirs have type Ⅲ. The inversion is carried out for reef-bank reservoirs using the AVO gradient and G-value anomaly. The favorable gas-bearing range of Changxing Formation is predicted, Reservoirs intervals of drilling wells are also predicted by further G-value section. Practice has proved that the predicted result corresponds to the logging data, AVO technology can be applied to the oiland gas prediction of the reservoirs.
引文
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2朱兆林,赵爱国.裂缝介质的纵波方位AVO反演研究[J].石油物探,2005,44(5):499-503.
3潘仁芳.AVO的内涵与外延[J].石油天然气学报,2006,28(2):50-55.
4王振国,陈小宏,王学军,等.AVO方法检测油气应用实例分析[J].石油地球物理勘探,2007,42(2):194-197.
5孟翠平,谢迟初,凡睿.AVO技术在CDN地区TTB构造含气预测中的应用[J].江汉石油科技,2006,16(2):18-19.
6胡伟光,蒲勇,赵卓男,等.川东北元坝地区长兴组生物礁的识别[J].石油物探,2010,49(1):46-53.
7殷八斤,曾灏,杨在岩.AVO技术的理论与实践[M].北京:石油工业出版社,1995.
2朱兆林,赵爱国.裂缝介质的纵波方位AVO反演研究[J].石油物探,2005,44(5):499-503.
3潘仁芳.AVO的内涵与外延[J].石油天然气学报,2006,28(2):50-55.
4王振国,陈小宏,王学军,等.AVO方法检测油气应用实例分析[J].石油地球物理勘探,2007,42(2):194-197.
5孟翠平,谢迟初,凡睿.AVO技术在CDN地区TTB构造含气预测中的应用[J].江汉石油科技,2006,16(2):18-19.
6胡伟光,蒲勇,赵卓男,等.川东北元坝地区长兴组生物礁的识别[J].石油物探,2010,49(1):46-53.
7殷八斤,曾灏,杨在岩.AVO技术的理论与实践[M].北京:石油工业出版社,1995.
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