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建南飞三、长二储层是建南气田的主力生产层,从完井发展历程来看,先后经历了三个重要阶段。受储层差异及技术水平制约,各阶段采取了不同的完井方式。建南飞三、长二储层选用针对性的酸压工艺及配套工具,以实现建南气田高效开发。针对飞三储层,应以套管完井为主,如被迫采用裸眼完井,可以通过暂堵多级酸压工艺以提高裸眼井段的整体改造效果。酸压过程中采用“前置注入+混注”液氮技术是提高低压、低渗气藏措施液返排率的有效手段。
Jiannanfei Third, Chang2 reservoir is the main production layer in Jiannan gas field. According to the well completion history, it has gone through three important stages successively. Constrained by reservoir differences and technical levels, different phases of completion have been taken. Jiannanfei three, Chang 2 reservoirs use targeted acid pressure technology and supporting tools to achieve efficient development of Jiannan gas field. In the case of Feisan Formation, casing-completion should be the mainstay. If forced open-hole completions are to be completed, the overall reforming effect of the open-hole section can be enhanced by temporarily plugging the multi-stage acid pressure process. Acid pressure in the process using “pre-injection + mixing injection ” liquid nitrogen technology is to improve low pressure, low permeability gas reservoir measures the effective means of liquid back row rate.