西湖凹陷低孔渗储层岩石物理特征分析及叠前同步反演地震预测

Petrophysical analysis and simultaneous pre-stack inversion prediction of the low porous and permeable reservoirs in Xihu sag

西湖凹陷普遍发育低孔渗油气藏,用单一地震属性或弹性参数难以预测低孔渗储层。为有效地减少储层预测的盲目性,降低勘探开发风险,提高储层预测精度和钻探成功率,在对西湖凹陷岩石物理特征进行分析的基础上,提出了采用叠前同步反演技术进行低孔渗储层地震预测的技术方案。经过西湖凹陷的实际钻井验证,表明该技术预测精度较高。

The hydrocarbon accumulations with low porosity and permeability are common in Xihu sag, and it is difficult to predict this type of reservoirs by u- sing a single seismic attribute or elastic parameter. In order to effectively reduce the prediction blindness and the exploration and development risk and to improve the prediction accuracy and the drilling success rate, a technical solution to predict the low porous and perme- able reservoirs by applying the tool of simultaneous pre-stack inversion has been proposed on a basis of analyzing the petrophysics of rocks in Xihu sag. After the actual drilling in the sag, it has been confirmed that this solution is high in prediction accuracy.