暂堵技术在致密气储层应用探析  

Application of Temporary Blocking Technology in Tight Gas Reservoirs

作　　者：周怡 于世虎 郭德斌 ZHOU Yi;YU Shihu;GUO Debin(Downhole Service Company,CNPC Chuanqing Drilling Engineering Co.,Ltd.,Chengdu 610051,Sichuan,China)

机构地区：[1]中国石油集团川庆钻探工程有限公司井下作业公司,四川成都610051

出　　处：《能源与节能》2023年第11期14-18,23,共6页Energy and Energy Conservation

摘　　要：随着油气资源开发力度的加大,致密气储层压裂改造向体积化、均衡化、精细化方向发展。套管变形、储层非均质性强、薄互层多、天然裂缝发育、裂缝扩展不均匀等工程地质复杂情况严重影响压裂实施及改造效果。利用高强度可溶性暂堵材料对部分炮眼或裂缝进行封堵憋压,通过人为应力干扰,达到簇间均衡、缝内扩展的目的,较好地解决了上述难题。梳理出致密气具有代表性的工程地质复杂情况,并有针对性地提出暂堵压裂技术方案,包括暂堵材料的优选、粒径组合、数量优化等,现场实施取得了良好的应用效果。暂堵技术已成为致密气均衡压裂、精细改造的重要手段,其成本低,工艺简单,对储层无污染,应用效果良好,是一种值得推广的技术。With the increase in the development of oil and gas resources,the transformation of tight gas reservoir fracturing is developing in the direction of large volume,balance and refinement.Complex engineering geology such as casing deformation,strong reservoir heterogeneity,multiple thin interbeds,development of natural fractures,and uneven fracture propagation have seriously affected the implementation and reconstruction effects of fracturing.The use of high-strength soluble temporary plugging materials to seal some blastholes or cracks and hold down pressure,through artificial stress interference,achieve the purpose of balance between clusters and expansion within the fractures,which solves the above problems well.This paper sorted out the representative engineering geological complex conditions of tight gas,and proposed a targeted temporary plugging and fracturing technical plan,including the optimization of temporary plugging materials,particle size combination,quantity optimization,etc.The on-site implementation had achieved good application results.Temporary plugging technology has become an important means of tight gas balanced fracturing and fine modification.It has low cost,simple process,no pollution to the reservoir,and good application effect.It is a technology worth promoting.

关 键 词：暂堵转向 非均质储层 套变 裂缝扩展 薄互层 

分 类 号：TD357.1[矿业工程—矿井建设]