摘要
针对延长气田气井压裂效果的影响因素,依据延长气田山2段地质、压裂及试井资料,通过定性及灰色关联分析方法,综合分析延长气田山2段25口气井压裂后对无阻流量的影响程度。研究结果表明,影响延长气田山2段气井压裂效果的主要因素依次为渗透率、生产层厚度、储层中部压力、加砂量、压裂液返排率和孔隙度。在其他条件相同的情况下,优选气层厚度大、渗透率高的井进行压裂,能够获得较高的产能。基于灰色关联法的分析结果,确定了压裂效果影响因素的优先顺序及影响程度大小,并优选3口典型井进行压裂,取得了良好的压裂效果。
Aimed at the influencing factors of gas wells fracturing effects in Yanchang gas field,according to geology,fracturing and well test data in the Shan 2,through qualitative and grey correlation analysis method,this paper analyzed the influencing degree on open flow capacity of 25 fractured wells in Shan 2.The result shows that the major influencing factors on the fracturing effects are permeability,productive layer thickness,central reservoir pressure,volume of sand,fracturing fluid flowback rate and porosity.The higher production can be achieved by optimizing the fractured wells which have the great gas layer thickness and high reservoir permeability on condition that others are same.Based on the results of gray correlation analysis,the priorities and influence degrees of fracturing effects are obtained,and the preferably three typical fracturing wells achieved good results.The conclusions and results can provide guidance and reference for Yanchang follow-up development.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2014年第4期603-609,共7页
Journal of Northwest University（Natural Science Edition）
基金
国家重大专项基金资助项目(2011ZX05051)
关键词
气井压裂
无阻流量
压裂效果
影响因素
灰色关联分析
gas well fracturing
open flow capacity
fracturing effect
influencing factor
gray correlation analysis
