复杂岩性地区岩性识别与储层预测

中国陆相地层岩性成分较为复杂，岩性波阻抗值常呈多极分布。水动能强度的急剧变化、高频率的水进水退等沉积背景造成了薄互层广泛发育的特点。储层间干涉现象普遍存在，直接影响到地震岩性解释的精度。针对复杂岩性地区岩性–波阻抗关系复杂的特点，系统分析了造成传统地震储层预测方法解释误差的原因。根据复杂岩性的地球物理响应特点，选取对区分复杂岩性敏感的测井参数。同时，将90° 相位化地震数据作为测井参数反演的相对波阻抗约束数据体。研究结果表明，该方法对复杂岩性进行了有效的区分，达到了精细描述复杂岩性地区储层空间发育及平面展布特点的目的。

Lithologies Recognition and Reservoir PredictionLithologies Area

In most petroleum-bearing basins of China，the lithologies of continental deposition strata are complex. The overlappingranges of acoustic impedance values of different lithologies lead to the non-uniqueness of lithological seismic interpretation.Rapid change of fluvial energy，high frequency of transgression and regression contribute to the wide development of thininter-bedding. The interferences between thin inter-bedding are universal，which affect the precision of seismic interpretation.Aiming at the complex lithology-acoustic impedance relationship，the difficulties of traditional seismic reservoir predictionmethods in identifying complex lithologies have been analyzed systematically. Also，according to the geophysical responsefeatures of the complex lithologies，the sensitive well logging parameter of identifying complex lithologies is chosen. Theninety-degree phasing of seismic traces in a relative impedance sense is selected to serve as a constrained role in well loggingparameter inversion. The result shows that this method is capable of recognizing complicate lithologies efficiently and the goalof explicit reservoir characterization in complex lithologies area can be obtained.