Synthesis and Evaluation of a High Temperature Water Base Drilling Fluid Filter Loss Reducer
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摘要: 针对牛东区块钻探过程中使用的抗高温降滤失剂价格高、增加生产成本的问题,开发了高温性能稳定且成本相对低廉的钻井液用抗高温降滤失剂BZ-HTF。用单因素实验法优选出最优合成参数:单体浓度为30%,反应时间为4 h,反应温度为55℃,引发剂用量为0.10%,AM、AMPS和IA质量比为42:40:18,水解度为30%。BZ-HTF抗温达220℃,且性能稳定;在淡水、盐水、复合盐水和饱和盐水基浆中均具有较好的降滤失能力,且对钻井液黏度、切力影响不大;与国外产品Driscal D性能相当,但商品估价只有其四分之一,具有较好的发展前景。Abstract: A high temperature water base drilling fluid filter loss reducer, BZ-HTF, was developed for use in Block Niudong, Qinghai. BZ-HTF was synthesized with monomers AM, AMPS and IA in a mass ratio of 42:40:18, and initiator concentration of 0.10%. Total concentration of the monomers was 30%. The reaction lasted for 4 hours at 55℃. BZ-HTF has a degree of hydrolysis of 30%, and remains effective at temperatures as high as 200℃. It has good filtration control capacity in fresh water base mud, brine mud and saturated saltwater mud, and does not greatly increase the viscosity and gel strengths of the muds. BZ-HTF has filtration control capacity comparable to Drispac D, while its cost is only one fourth of the latter.
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