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:FW调剖剂是用聚丙烯酰胺 (PAM)与木质素磺酸盐 (Ca -LS)的缩合产物为主体剂 (PS) ,用K2 Cr2 O7与硫脲氧化还原体系为交联剂而形成的凝胶 .主体剂PS的合成条件 :PAM溶液的质量分数为 0 .3% ,催化剂的质量分数为 0 .1% ,Ca -LS的质量分数为 1.5 % ,反应温度为 6 0℃ ,反应产物的特性粘数为 3 .0 5L·g- 1 ,凝胶强度小于 2 0 0mPa·s ;FW调剖剂的基本配方 :主体剂PS的质量分数为 1.8% ,交联剂重铬酸钾与硫脲的质量分数分别为 0 .2 %与 0 .4% ,该调剖剂成胶时间为 10～ 40h ,凝胶强度为 2 0～ 6 0Pa·s.在大庆油田注水井上应用后 ,与 7口调剖注水井相连通的 2 1口油井 ,平均日增油6 8t,含水率降低了 1.84% ,增油效果明显
: FW profile control agent is the condensation product of polyacrylamide (PAM) and lignin sulfonate (Ca-LS) as the main agent (PS), with K2 Cr2 O7 and thiourea redox system as a crosslinking agent to form The main agent PS synthesis conditions: mass fraction of PAM solution was 0.3%, the mass fraction of the catalyst was 0.1%, Ca-LS mass fraction of 1.5%, the reaction temperature was 60 ° C, the reaction The intrinsic viscosity of the product is 3.05L · g-1, the gel strength is less than 200mPa · s; The basic formulation of FW profile control agent: the mass fraction of the main agent PS is 1.8%, the crosslinking agent potassium dichromate And thiourea were 0.2% and 0.4% respectively, the gelling time of the profile control agent was 10-40h, and the gel strength was 20-60Pa · s. After the application of water injection wells in Daqing oilfield, The 21 oil wells connected with 7 profile injection wells have an average daily oil yield of 68t and the water cut rate has decreased by 1.84%