钻井液用抗高温降滤失剂FRT-1的合成及性能

Synthesis and Evaluation on High-temperature Filtrate Reducer FRT-1 Used in Drilling Fluid

由丙烯腈(AN)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)和带环状侧取代基乙烯单体(CV)聚合制备了1种水基钻井液用新型抗高温降滤失剂FRT-1,评价了其在不同钻井液中的应用性能,并与国外市售的TEMP、Cal D、4706进行了对比。加入1%FRT-1,可将淡水基浆高温高压滤失量降低50%、盐水基浆高温高压滤失量降低78%、海水基浆高温高压滤失量降低83%;在海上使用的甲酸钾钻井液中加入1%FRT-1,可将高温高压滤失量(150℃)控制在10 mL左右;在海上使用的聚磺钻井液中加入1%～1.5%FRT-1,可将高温高压滤失量(180℃)控制在25mL左右,FRT-1体现出较好的抗温性和降滤失性,达到国外市场样品同等水平。

A High-temperature filtrate reducer, FRT-1, is synthesized with acrylonitrile (AN), 2-acryamido-2-methylpropane-sulfonate (AMPS) and vinyl having cycle substituting group (CV).The HTHP filtration loss value of different drillingfluid systems with 1% FRT-1 are evaluated that the fresh water, salt water and sea water are reduced by 50%, 78%and 83%, moreover, the filtration loss value of formate potassium and polysulfonate drilling fluid systems are 10 mL(150℃),25mL(180℃).