公开(公告)号：US20040106525A1

公开(公告)日：2004-06-03

申请号：US10605687

申请日：2003-10-17

申请人： SCHLUMBERGER TECHNOLOGY CORP.

发明人： Dean Willberg ,  Keith Dismuke

IPC分类号： E21B043/00

CPC分类号： C09K8/06 ,  C09K8/03 ,  C09K8/5045 ,  C09K8/506 ,  C09K8/72 ,  C09K8/74 ,  Y10S507/923 ,  Y10S507/933

摘要： A composition and method are given for self-destructive fluid loss additives and filter cakes in wellbores and subterranean formations. The fluid loss additives and filter cakes are formed from a mixture of particulate solid acid-precursors, such as a polylactic acid or a polyglycolic acid, and particulate solid acid-reactive materials, such as magnesium oxide or calcium carbonate. In the presence of water, the solid acid-precursors hydrolyze and dissolve, generating acids that then dissolve the solid acid-reactive materials. The composition is used in oilfield treatments such as drilling, completion and stimulation where it disappears when it is no longer needed without the use of mechanical means or injection of additional fluids.

摘要翻译： 给出了在井筒和地下地层中自毁失水添加剂和滤饼的组合物和方法。 流体损失添加剂和滤饼由颗粒状固体酸前体如聚乳酸或聚乙醇酸和颗粒状固体酸反应性材料如氧化镁或碳酸钙的混合物形成。 在水的存在下，固体酸前体水解和溶解，产生酸，然后溶解固体酸反应性材料。 该组合物用于油田处理，例如钻井，完井和刺激，当不再需要机械装置或注入另外的流体时，它就不再需要。