裂缝性气藏压裂关键技术

摘要

During fractured gas reservoir fracturing, natural fracture unblock to cause serious fracturing fluid loss and hard to generate major fracture, so it's easy to bring sand plug at the low sand concentration step and high pressure. The applications of fracture diagnosing technology before Frac and the comprehensive decreasing fluid loss technology,real time fracture diagnosing technology at Frac are key to make sure generate major fracture with definite slot width. It provides safeguard for later sand fracturing.%结合川西和国内外裂缝性油气藏在压裂施工实际,在裂缝性气藏压裂施工过程中,由于天然裂缝开启导致的压裂液过量滤失、主裂缝难以形成和延伸,施工过程中表现出高的施工压力和低砂比阶段快速砂堵等难点,通过压前裂缝诊断技术、压裂施工过程中的综合降滤、实时裂缝诊断技术是确保裂缝性气藏压裂避免沿天然裂缝延伸形成张开程度不一的多支缝,确保施工过程中形成具有一定缝宽的主裂缝的关键.为后期加砂压裂提供了基础保障.