摘要
水力压裂工艺是低渗透气田的一项主要增产措施。影响气层压后效果的因素有很多,分析各影响因素对压裂后无阻流量的影响程度,对改善压裂开发效果和提高单井产量具有重要意义。文中利用灰色关联法,对鄂尔多斯盆地盒8低渗透气层的29口压裂井进行分析,研究结果表明:影响压后产量的主要因素依次为储层渗透率、砂量、排量和气层厚度;在其他条件相同的情况下,优选渗透率高、气层厚度大的压裂井,在合理的范围内采用较大的排量和砂量进行压裂施工,能获取较高的产能。文中研究方法为压裂效果影响因素的量化分析提供了新的思路,所得结论为低渗透气层的压裂设计和效果评价提供了可靠的依据。
Hydraulic fracturing is a major stimulation approach in the development of low permeability gas reservoir. There are many factors which affect postfracture response. Analyzing the effect of these faetors on open flow eapacity is of great significance in improving postfracture response and increasing the single well production rate.Based on gray relevance analysis method, this paper had analyzed 29 fractured wells in the He 8 low permeability reservoir of OMos Basin. The resuh shows that the major influencing factors on the productivity are sueeessively reservoir permeability, proppant amount, pumping rate and gas zone thickness. When the other reservoir conditions are same, through optimizing the fractured wells which have the high reservoir permeability and great pay zone thickness and using the great pumping rate and proppant amount within reason in the process of fracturing operation, the high production rate can be achieved. The research provides a new quantitative analysis method for evaluating the influencing factors on postfracture response and presents the reliable basis for fracturing design and resuh evaluation in low permeability gas reservoir.
出处
《断块油气田》
CAS
2013年第1期133-136,共4页
Fault-Block Oil & Gas Field
基金
陕西省科学技术研究发展计划项目"井下裂缝导流能力测试解释技术"(2011K08-13)
关键词
气层压裂
压裂效果
影响因素
灰色关联分析
无阻流量
gas zone fractufing
postfracture response
influencing factor
gray correlation analysis
open flow capacity
