摘要
从聚合物分子能在砂岩表面形成牢固吸附出发设计聚合物组成，从聚合物分子线团能进入低渗透地层孔隙出发确定聚合物的分子量，研制了两性离子聚合物YHL961，其1％地层水溶液的表现粘度为4-7mPa·s，易泵送易注入，耐盐性好，在人造中低渗透岩心上进行封堵实验，堵水率在98％以上，堵油率低于30％。
Amphoteric polymer YHL961 (Mw=69700) is prepared by copolymerizing DMDAAC, AM, monomers containing carboxyl and sulfono groups according to a molecular design. The apparent viscosities of YHL961 solutions in a fresh, a field produced, and a salt (20% NaCl) waters at 21℃ and 65-70℃ are determined. 1% solution in produced water (TSD= 2.0 ×105 ppm) has viscosities 4-7mPa·s. In core flow experiments on waterand oil-saturated cores with this YHL961 solution, high water blocking rates (＞～80%) are observed initially and increase gradually in the course of followed water flood to＞90% (21℃) and to＞99% (65-70℃) at＞50 PV water injected; the oil blocking rates are lower (～70%) initially and decrease with followed water flood to～28% at 300PV water injected.
出处
《油田化学》
CAS
CSCD
北大核心
1998年第3期257-260,共4页
Oilfield Chemistry
关键词
两性聚合物
水溶液型
堵水剂
油井
Selective Water Blockage Agent, Amphoteric Polymer, Molecular Design, Polymer Solutionsfor Water Control, Water/Oil Blocking Abilities, Medium-Low Permeable Reservoirs
