岩溶储层综合预测技术在四川盆地Y地区的应用

Karst reservoir prediction in Area Y,Sichuan Basin

四川盆地Y地区主要目的层雷口坡组受印支运动影响发育一套岩溶性储层。该套储层厚度薄,且具有低孔、低渗特征,导致储层预测难度加大,难以厘清气藏的成藏控制因素。针对该区岩溶储层的发育特点,综合利用钻井、测井及地震资料,运用古地貌恢复、模型正演分析及多属性综合分析等技术手段综合预测了Y地区雷口坡组岩溶储层分布的有利区带,预测结果与实际钻井资料较好吻合,取得了较好的应用效果。

The target in Area Y,Sichuan Basin is Leikoupo Formation,which consist of sets of karst reservoirs developed by the Indosinian movement.These reservoirs are characterized by small thickness,low porosity,and low permeability,which are very difficult to be predicted.And the controlling factors of reservoirs are also very difficult to be identified.So we propose here a comprehensive reservoir prediction method based on multi-discipline data.Based on development characteristics of karst reservoirs combined with drilling,logging,and seismic data in the area,we predict karst reservoirs in Area Y with paleo-geomorphilogy restoration,forward modeling,and multi-attributes.The prediction results match very well with the later drilling.