应用模糊综合评判方法优选水力压裂井

Optimizing Hydraulic Fracturing Wells with the Method of Fuzzy Comprehensive Evaluation

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 complex relationship between fracturing effect factors of hydraulic fracturing wells and each influencing factor is fuzzy in itself, it is very difficult to research these factors with the conventional method. This passage tries to optimize hydraulic fracturing wells with the method of fuzzy comprehensive evaluation. By analyzing these fracturing influencing factors, drawdown pressure, water cut, incremental oil before fracturing, porosity, permeability, influencing ive thickness of small layer, sand volumes and so on 7 main factors. The weight of each influencing factor is obtained by using the analytic hierarchy method. At last, fracturing wells are estimated with method of fuzzy comprehensive evaluation. Finally, we determine whether this well should be fractured and optimize the fracture wells. The practical application shows that this method can improve the work efficiency in the oilfleld and the objectivity of selecting well.