植物胶压裂液杀菌防腐剂的研究与应用

BACTERICIDE JA-1 AS BIODETERIORATION PREVENTOR FOR PLANT GUM BASE HYDROFRACTURING FLUIDS

华北油田在配制植物胶水基压裂液时 ,曾使用 40 %甲醛水溶液 (加量 0 .5 %— 1.0 % )为杀菌防腐剂 ,未能控制压裂液的霉腐变质 ,霉变率 (坏罐率 )高达 10 %以上。本文报道的杀菌防腐剂JA 1,为一种有机胺类制剂。在室内实验评价中 ,加量 0 .0 5 %— 0 .5 %的JA 1的防腐效果为甲醛液的 10倍 ;在低温应用条件下 (浅井压裂 )可使交联剂硼砂的用量减少 40 %— 6 0 % ,在高温应用条件下 (深井压裂 )可使压裂液冻胶的运动粘度提高 2— 3.7倍。JA 1在华北油田各地区投入使用以来 (1992— 1999) ,压裂液的霉变率 (坏罐率 )降低到平均仅为 0 .9%

An amine bactericide, JA 1, is developed to prevent plant gum base hydrofracturing fluids(HFFs) from deteriorating by microorganisms. The laboratory comparative evaluation shows that JA 1 is 100 times as effective as formalin. With 0.05—0.5% JA 1 added into HFFs, the amount of the borate needed can be reduced by 40—60% for low temmperature treatments in shallow wells or the viscosity of gelled fluids are increased by 3—4.7 times for higher temperature treatments in deep wells. At Huabei Oil Fields, the deterioration rate of the HFFs treated with JA 1 acounts only 0.9% in 1992—1999 as contrasted to>10% in 1991 when formalin was used.