元坝地区长兴组超深层礁滩储层地震预测

Seismic Prediction of Deep Reef-Bank Reservoirs in the Changxing Formation in the YB Area

礁滩储层非均质性强,地震识别困难,采用波阻抗反演以及常规地震属性等储层预测方法预测难度较大。针对这一问题,根据近年来在元坝(以下简称YB)地区储层预测方面的实践,形成了一套以数值建模为基础,以波形分类及地震属性切片为指导,以相控储层精细预测及叠前流体检测技术为核心的超深层碳酸盐岩储层精细预测方法,并在YB地区的应用中获得了良好的效果。落实了YB地区长兴组台缘礁滩勘探目标,已完钻的井钻遇礁滩储层综合成功率达92.3%,表明该技术方法的有效性,并为其他礁滩储层发育区的高效勘探提供了技术参考。

Organic reef-bank reservoirs with the characteristic of significant heterogeneity are hard to distinguish in the seismic profile. Meanwhile, the wave impedance inversion and seismic attributes have failed in the prediction. To solve this problem, according to the practice of reef-bank reservoir prediction in the YB area in recent years, a reservoir prediction method for carbonate reservoir has been studied, which was based on numerical modeling, waveform classification and seismic attribute slices. It used reservoir prediction under facies constraint and pre-stack fluid detection technology as the core technique. It has been used in YB area. Exploration targets of organic reef-bank reservoirs were confirmed. The comprehensive success rate of drilled wells which drilled reef beach reservoir was up to 92.3%. It showed the validity of the method and provided a technical reference for the efficient exploration of other reef-bank reservoir development area.