沁水盆地郑庄示范区CRP地震储层预测实践
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摘要
随着地震勘探技术在沁水盆地的不断深入,从二维到三维,发展到利用CRP(共反射接收点道集)角道集进行煤层气储层预测,使得煤层气储层预测技术方法不断完善。以沁水盆地郑庄示范区为例,三维在精度上明显优于二维,能够较准确地预测煤层的分布范围及厚度情况,但含气性、微裂缝预测精度不理想;而利用CRP角道集数据开展AVO反演、应力场数值模拟及各向异性裂缝检测,效果较显著。预测结果可为该示范区井位部署提供参考依据,为其他地区煤层气地震储层预测提供借鉴。
With the deeping of seismic exploration technology in Qinshui Basin,The technology and methods on predicting coalbed gas reservoir is developed from 2Dseismic data to 3Dseismic data,to CMP seismic data.Zhenzhuang Area is taken for example of coalbed gas field in Qinshui Basin.In view of coal distribution and coal seam thickness,The Precision is more better by 3Dseismic data than by 2Dseismic data;in view of coalbed gas,it is no good by CMP seismic data,it mainly uses the methods of the prestack seismic stress field modeling and AVO inversion and anisotropic fracture testing.The good result offeres reliable proof for well location deployment,and the methods sets an example for predicting coalbed gas reservoir in other basins.
With the deeping of seismic exploration technology in Qinshui Basin,The technology and methods on predicting coalbed gas reservoir is developed from 2Dseismic data to 3Dseismic data,to CMP seismic data.Zhenzhuang Area is taken for example of coalbed gas field in Qinshui Basin.In view of coal distribution and coal seam thickness,The Precision is more better by 3Dseismic data than by 2Dseismic data;in view of coalbed gas,it is no good by CMP seismic data,it mainly uses the methods of the prestack seismic stress field modeling and AVO inversion and anisotropic fracture testing.The good result offeres reliable proof for well location deployment,and the methods sets an example for predicting coalbed gas reservoir in other basins.
引文
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[2]赵晨光.薄互层地震反射特征分析[J].石油地球物理勘探,1986,21(1):32-46.
[3]凌云研究组.地震分辨率极限问题的研究[J].石油地球物理勘探,2004,39(4):435-442.
[4]赵政璋,赵贤正,王英民,等.储层地震预测理论与实践[M].北京:科学出版社,2005:234-243.
[5]王捷.油藏描述技术——勘探阶段[M].北京:石油工业出版社,1996:160-165.
[6]沈财余,崔汝国.影响测井约束地震反演地质效果因素的分析[J].物探与化探,2003,27(2):123-127.
[7]宋维琪.应用地震属性与测井数据反演储层参数[J].勘探地球物理进展,2003,26(3):216-219.
[8]印兴耀,韩文功,李振春,等.地震技术新进展(下)[M].东营:中国石油大学出版社,2006.
[9]彭苏萍,高云峰.含煤地层振幅随偏移距变化正演模型研究[J].科学通报,2005,50(增刊Ⅰ):131-137.
[10]彭晓波,彭苏萍,詹阎,等.P波方位AVO在煤层裂缝探测中的应用[J].岩石力学与工程学报,2005,24(16):2960-2965.
[11]冯小英,秦凤启,焦勇,等.沁水盆地煤层气地震储层预测技术方法研究[J].中国煤层气,2011,6(8):8-12.
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