关键词: 铬冻胶, 双液法, 堵剂用量, 单液法堵剂, 成冻时间, 堵水, 冻胶强度, 堵漏剂, 沉淀型, 埕东油田

Abstract: This paper introduces the results of study and application in block wide watershutoff southwest chengdong oilfield, including the evaluation and improvement of chromium gel used in single fluid method, screening of the precipitatedtype plugging agent used in double fluid method, changing the chromium gel into a plugging agent which can be used in double fluid method, introducing the chrconium gel and using leak plugging agent etc. According to the programme of watershutoff,11267m³ of above-mentione different plugging agents have been put into formation.During the test period, the annual increasing of water cut has been controlled to a level of less than 2% and increased of oil production has reached 3×l0⁴t.