常见酸压压降评价方法与储层特征相关性研究

Common Acid Pressure Reduction Evaluation Methods and the Correlation with Reservoir Characteristics

通过对碳酸盐岩不同储层类型酸压后评价体系的研究,建立了G函数曲线评价、裂缝净压力双对数曲线评价、酸压后不稳定试井曲线评价等3种酸压压降评价方法,分析了3种评价方法对储层特征定性判别的系统评价体系,定性地判断出井周围的缝洞发育情况,有效地指导下一步的酸压设计和施工。以某井区A井酸压施工层段为例,运用3种评价方法对储层特征有较明确的认识,建立了一套酸压压降评价方法对储层特征判别的评价体系。

By researching on the evaluation system of different reservoir types of carbonate rocks after acid fracturing,three methods of acid pressure reduction evaluation,namely the evaluation of G function curve,double logarithmic curve of fractural net pressure and unstable well testing curve after acid fracturing were established.Also,based on the three methods,a systematic evaluation system for qualitative analysis of reservoir characteristics was analyzed,aqualitative evaluation was given to the development of fractures and caverns around the well and it provided guidance for the subsequent acid pressure design and operation.Based on the well section operation of A Well in a wellblock and by applying these three evaluation methods relatively clear cognition of the reservoir characteristics are obtained,an obvious response of the corresponding reservoir characteristics is also obtained.