提高大牛地气田三维地震储层预测精度的思考

大牛地气田是以岩性气藏为主的气田,煤系储层发育,储层厚度薄,横向非均质性强,储层的地质特征和煤层的强反射影响了地震资料预测储层的精度,使得有些钻井在预测的储层有利区却没有钻遇到高产气流.因此提高储层预测精度是加速大牛地气田产能建设的关键之一.为此,就如何提高大牛地气田三维地震资料储层预测的精度,从研究思路和研究方法上提出了若干思考与建议.

Considerations for improving accuracy of reservoir prediction from 3-D seismic data in Daniudi gas field

Daniudi gas field is mainly of lithologic gas pool characterized by well developed coal-bearing formation, thin reservoir thickness and good lateral anisotropy. The geological characteristics and the strong reflection of coal formations affect the reservoir prediction accuracy of seismic data, making some drillings not meet high production gas flow, which were formerly predicted to be the favorable gas-bearing area. Therefore, improving the reservoir prediction accuracy is one of the key issues for promoting productivity in Daniudi gas field. On the basis of this, some considerations and suggestions were proposed to improve the reservoir prediction accuracy of 3-D seismic data in Daniudi gas field.