公开(公告)号：US06176315B1

公开(公告)日：2001-01-23

申请号：US09205467

申请日：1998-12-04

申请人： Baireddy R. Reddy ,  Larry S. Eoff ,  Jiten Chatterji ,  San T. Tran ,  E. Dwyann Dalrymple

发明人： Baireddy R. Reddy ,  Larry S. Eoff ,  Jiten Chatterji ,  San T. Tran ,  E. Dwyann Dalrymple

IPC分类号： E21B33138

CPC分类号： C09K8/512 ,  Y10S507/902

摘要： The present invention provides methods of preventing the flow of water or gas or both through a subterranean zone having a high temperature and a depth such that a long pumping time is required to place a sealing composition therein. The methods basically comprise the steps of preparing a polymeric sealing composition comprised of water, a cross-linking agent and a selected water-soluble polymer which reacts with the cross-linking agent and forms a sealing gel which is stable for a desired period of time at the temperature of the zone and has a pumping time before gelation in the presence of the cross-linking agent whereby the composition can be pumped to the depth of the zone and placed therein. Thereafter, the sealing composition is pumped into the zone and allowed to form a sealing gel therein.

摘要翻译： 本发明提供了防止水或气体或两者通过具有高温度和深度的地下区域的流动的方法，使得需要长的抽吸时间以将密封组合物放置在其中。 所述方法基本上包括以下步骤：制备由水，交联剂和选定的水溶性聚合物组成的聚合物密封组合物，所述聚合物密封组合物与交联剂反应并形成密封凝胶，所述密封凝胶在期望的时间段内是稳定的 在该区域的温度下，并且在交联剂存在下具有凝胶化之前的泵送时间，由此组合物可被泵送到该区域的深度并放置在其中。 此后，将密封组合物泵入该区域并使其在其中形成密封凝胶。