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考虑到水力压裂井压裂效果影响因素之间的关系复杂,且各影响因素本身具有模糊性,这些因素很难用常规方法量化研究,尝试应用模糊综合评判的方法进行水力压裂井优选.通过对影响压裂效果的各个因素进行分析,优选出生产压差、含水率、压前增油量、孔隙度、渗透率、小层有效厚度、加砂量等7个主要因素,并应用层次分析法得到各个影响因素的权重,最后采用模糊综合评判方法对水力压裂井进行评估,最终判定其是否适合压裂并对压裂井进行优选,现场实际应用表明,该方法可以提高现场的工作效率和选井的客观性、准确性.
Considering the complicated relationship between the influencing factors of fracturing effect of hydraulic fracturing wells and the inherent fuzzy factors, it is very difficult to quantitatively study these factors by conventional methods. At the same time, the method of fuzzy comprehensive evaluation is suggested to optimize the hydraulic fracturing wells. Based on the analysis of various factors that affect the fracturing effect, seven major factors such as pressure difference, water cut, oil increase before PRI, porosity, permeability, effective thickness of sand layer and sand content were optimized. The weight of each influencing factor is obtained through the analysis method. Finally, the fuzzy comprehensive evaluation method is used to evaluate the hydraulic fracturing well, and finally determine whether it is suitable for fracturing and optimize the fracturing well. The practical application shows that this method can improve the work in the field Objectivity and Accuracy of Efficiency and Well Selection.