苏里格东区致密气藏压裂水平井产能影响因素及其优化设计

对苏里格东区某实际致密气藏进行了压裂水平井产能影响因素分析,得到主控因素,并据此完成不同储层条件下压裂水平井参数设计的优化图版.结果表明:地层渗透率越低、各向异性越强,则水平井段和裂缝的最优长度越大,最优压裂裂缝间距越小,且各影响因素对增产效果影响具有相关性.

Factors influencing the productivity of fractured horizontal wells in the tight gas reservoir of eastern Sulige Gasfield and the optimization of them

The staged fracturing of horizontal wells is the effective stimulation measures of tight gas reservoir. There are many factors influencing the productivity of the fractured horizontal wells,including geological factors and technological factors( that is,the parameters of the fractured horizontal wells) . Under different geological conditions,the effects of technological factors on the productivity are different. The factors influencing the productivity of fractured horizontal wells in the tight gas reservoir of eastern Sulige Gasfield are analyzed,and the main factors are found. Based on these,the optimization charts of the fractured horizontal well parameters under different geological conditions are obtained. The results show that,with the reservoir permeability becoming low and anisotropy becoming strong,the optimal horizontal section and the optimal fractured fracture of the horizontal wells will be longer,and the optimal space between fractures will be less. The effects of the factors on the productivity are correlative. The research results in this paper can provide guidance for the optimization of the fracture parameters of the staged fracturing horizontal wells in the tight gas reservoir.