吐哈油田裂缝-孔隙性油气藏保护技术

裂缝性储层受损害的主要原因是固相或液相的侵入。由于钻井液固相粒径与裂缝大小不匹配，使裂缝成了钻井液的流动通道，造成储层永久性损害。开发出了裂缝-孔隙性油气藏暂堵材料LF-1和EP-1，研究了保护裂缝-孔隙性油气藏钻井液性能要求及处理工艺。并对该技术在4口井上的初试做了评价。结果表明，暂堵材料LF-1和EP-1与钻井液有很好的配伍性，钻井液密度易控制，有良好的滤失造壁性和较强的抑制性，满足了裂缝-孔隙性油气藏保护的需要。为今后吐哈盆地保护裂缝-孔隙性油气藏奠定了基础。

Fractured and porous reservoir protectiontechnology in Tuha oilfield

Formation damage of fractured reservoir is mainly caused by solids and liquids invasion, and permanent damage could be caused because of the solids in drilling fluid enter into the formation fractures. Tem porary plugging agent LF-1 and FP 1 are developed. and the drilling fluid performance and field maintenance are also investigated. This technology is applied in 4 wells, and the results show good compatibility between drilling fluid and plugging agents, easy control of mud density, better filtration control and higher inhibition.