低渗气藏开发的关键性技术与发展趋势

KEY PRODUCTION TECHNOLOGIES OF LOW-PERMEABILITY GAS RESERVOIRS AND THEIR DEVELOPMENT TREND

为了经济高效地开发低渗透气藏,对液相滞留、应力敏感性、水相自吸入等低渗气藏储层的主要伤害类型进行了分析,认为目前低渗气藏开发的主要关键性技术包括:①低渗气藏储层综合表征技术的应用(气藏地质和气藏工程);②低渗气藏钻井技术(水平井、大斜度井技术和气体欠平衡钻井技术);③低渗气层压裂改造技术。然后探讨了低渗气藏开发技术的发展趋势,提出需要加强发展的5个方面:加强基础理论研究;加强低渗透储层精细描述和储层预测;井间动态监测技术;低渗透气层改造技术;复杂结构井提高低渗气藏采收率技术。

In order to economically and efficiently develop low-permeability gas reservoirs, studies are performed on the main types of damage to low-permeability gas reservoirs, such as liquid phase detention, stress sensitivity, and water phase imbibition. It is believed that the following technologies are critical for recovery of low-permeability gas reservoir: ① comprehensive characterization of low-permeability gas reservoirs, such as gas reservoir geology and engineering; ②erilling technologies for low-permeability gas reservoirs, such as horizontal well, highly deviated well and underbalanced gas drilling technologies; ③fracturing of low-permeability gas reservoirs. The development trends of low-permeability gas reservoirs recovery technologies are discussed and it is proposed that studies on the following five aspects should be strengthened, including basic theory, fine description and prediction of low-permeability reservoirs, interwell performance monitoring, reformation of low-permeability gas reservoirs, and enhanced gas recovery of low-permeability gas reservoirs with complex structure wells.