摘要
利用等效井径模型和叠加原理,考虑裂缝变质量入流和非均匀裂缝参数的影响,建立了适合特低渗透致密气藏水平井分段压裂产能优化模型,并结合实例对产能敏感因素进行了优化分析。结果表明:水平井两侧裂缝入流速度大于内部裂缝入流速度;储层渗透率越大,最优裂缝导流能力越大;裂缝条数和裂缝半长不是越多越长越好,存在极限值;裂缝与井筒垂直时产量最大。研究成果致密气藏水平井分段压裂的设计提供了科学依据。
Based on the equivalent radius model and superposition potential, a productivity model for tight gas reservoirs was developed, which considered the influence of variable mass flow in fractures. Combined with examples, capacity sensitive factors were analyzed. The results show that close toe fractures inflow velocity segment has been reduced; the larger matrix permeability, the greater the optimum fracture conductivity; The number of fractures and fracture half-length is not more the longer the better, there is a limit; When fracture angle is 90°,the productivity is most. The research results provide a scientific basis for the design of multi-fractured horizontal wells in the ultra-low permeability tight gas reservoirs.
出处
《当代化工》
CAS
2015年第3期642-644,656,共4页
Contemporary Chemical Industry
基金
黑龙江省教育厅创新基金"低渗透油藏优化开采理论研究"
项目号:12511020
关键词
致密气
分段压裂
产能
优化
Tight gas
Staged fracturing
Productivity
Optimization
