Development and evaluation of water-plugging materials used in screen horizontal wells

Annular chemical packer (ACP) technology is an effective technique method for separating the horizontal section in screen tube horizontal well, but the performance of core ACP material still cannot meet the requirement of the process. The high-strength self-degradation ACP material used in screen tube horizontal well water plugging was developed to solve the problems of conventional plugging material with low strength, horizontal annulus incomplete filling and difficult degradation. The new developed material took guar gum and mannase as its components, which broke the research limitation of conventional gel material. The features of gelling, annulus filling and degradation performance were investigated in detail. And the feasibility of newly developed material applied in annulus packer in horizontal well water plugging was verified through the full-size horizontal well screen tube model and field tests.