植物胶压裂液杀菌防腐剂的研究与应用

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％－60％，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％。

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

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