碳酸盐岩储层流体综合预测

Integrated fluid prediction for carbonate reservoir

塔北隆起西部地区碳酸盐岩储层具有较强的空间非均质性,流体预测颇具难度。研究表明,应用Probe叠前反演流体因子软件对缝洞型碳酸盐岩储层流体预测效果比叠后属性流体预测更为有效;通过自动剩余动校正、中值滤波等叠前道集预处理方法能有效消除非储层流体因素引起的AVO假象;基于储层流体替换的正演分析证实,碳酸盐岩储层含油气之后AVO现象更趋明显;测井资料的综合应用可以降低碳酸盐岩储层流体预测风险。

It is a real challenge to predict hydrocarbon in carbonate reservoir in the western Northern Tarim Uplift because carbonates in the region have strong heterogeneity.According to our experience,the Probe AVO software is more effective to predict fluid in fracture-cavity carbonate reservoir than conventional post-stack fluid attributes.Using automatic residual NMO,median filter and amplitude equalization,we reduce partially AVO pseudomorph caused by non-reservoir and non-hydrocarbon.It proves that AVO response aroused by hydrocarbon bearings is more obviously than water bearings in carbonate reservoir after utilizing fluid substitution and AVO forward modeling.Meanwhile,we utilize well logging data interpretation to predict fluid in carbonate reservoir to reduce prediction risks.