四川盆地铁山坡地区飞仙关组鲕滩储层地震预测

四川盆地东北部的三叠系下统飞仙关组是重要的油气储层,其储集岩体主要为经晚期白云岩化改造的鲕滩坝沉积的致密鲕粒白云岩、鲕粒灰岩.铁山坡地区位于开江-梁平海槽的东北边缘,具备发育飞仙关组鲕滩储层的条件.但是,复杂多变的围岩和严重的非均质性增加了储层预测的难度,为此,在储层预测中采用了基于信息融合理论的地质模型约束地震反演,把地质、测井、地震等多元地学信息统一到同一个模型上,将各类信息在模型空间进行有机融合,提高了反演的信息使用量、信息匹配精度和反演结果的置信度.同时,利用空间地质约束相干识别技术对储层的含气、含水及气水关系等进行了检测和识别,检测结果与钻井资料吻合.

The seismic predication of the oolitic shoal reservoirs in Feixianguan Formation, Sichuan basin

Feixianguan Formation of lower Triassic is an important reservoir, which mainly consists of the dense oolitic dolomite and limestone altered by the late dolomitization of oolitic bars. Tieshanpo area is located in the northeast edge of Kaijiang-Liangping trough during the Feixianguan Period where is very favorable to form oolitic shoal reservoir. The seismic inversion constrained by geological model and based on theory of information fusion is used in reservoir prediction. Much geosciences information is unify to the same model including geology, well logging, seismic and so on, and is fused organically in model space to increase the information, improve the information matching and confidence. At the same time, the technique of coherent interpretation constrained by geology also made preferable effect in the reservoir prediction of gas, water and their relationship.