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抗温耐盐环保型降滤失剂的研制及性能评价
Development and performance evaluation of temperature-resistant and salt-tolerant and environment-friendly filtrate reducer
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- DOI:
- 作者:
- 侯珊珊 1，2，3 ，鄢祥玉 1 ，吴素珍 1
Hou Shanshan1, 2, 3, Yan Xiangyu1 , Wu Suzhen1
- 作者单位:
- 1. 荆州嘉华科技有限公司；2. 油气田清洁生产与污染物控制湖北省工程研究中心； 3. 长江大学非常规油气湖北省协同创新中心
1. Jingzhou Jiahua Technology Co., Ltd.,； 2. Hubei Engineering Research Centers for Clean Production and Pollution Control of Oil and Gas Fields; 3. Hubei Cooperative Innovation Center of Unconventional Oil and Gas, Yangtze University
- 关键词:
- 环保盐水钻井液；纤维素衍生物；接枝共聚；抗温耐盐；增黏降滤失
environment-friendly brine drilling fluid; cellulose derivatives; graft copolymerization; temperature and salt tolerance; increasing viscosity and reducing filtrate loss
- 摘要:
- 针对目前天然高分子材料纤维素的常规改性过程中耐高温、耐盐性难以进一步提升的问题，以聚阴离子纤维素（PAC）为原料，2-丙烯酰胺基-2-甲基丙磺酸(AMPS）、N,N-二甲基丙烯酰胺(DMAM）、二烯丙基二甲基氯化铵(DMDAAC）为接枝单体，采用接枝共聚法制备了一种抗温耐盐增黏降滤失剂 PAC-ADD。并评价了其在淡水浆、4%盐水浆、饱和盐水浆和环保盐水钻井液中的增黏降滤失效果。结果表明：PAC- ADD 在基浆中抗温达 160 ℃，2%加量时各基浆黏切提高超过 3 倍，API（American Petroleum Institute）滤失量降低超过 80%；该剂在钻井液体系中抗温达到 180 ℃，2%加量时即具有优异的流变和降滤失性能，明显优于常规改性的纤维素衍生物材料，在生态敏感地区高温复杂井中具有广阔的应用前景。
To address the challenge of improving the high -temperature resistance and salt tolerance of conventional modified
natural polymer cellulose materials, a temperature-resistant and salt-tolerant viscosity-increasing and fluid-loss reducer named
PAC-ADD was prepared via graft copolymerization using polyanionic cellulose (PAC) as the raw material, and 2-acrylamido-2-
methylpropanesulfonic acid (AMPS), N,N-dimethylacrylamide (DMAM), and dimethyldiallylammonium chloride (DMDAAC) as
grafting monomers. The viscosity-increasing and fluid-loss control effects of PAC-ADD were evaluated in freshwater slurry, 4%
saline slurry, saturated saline slurry, and environmentally friendly saline drilling fluids. The results indicated that PAC -ADD
exhibits a temperature resistance of up to 160 ℃ in the base slurry. At a 2% dosage, the viscosity and shear force of each base
slurry increased by more than three times, and the API fluid loss decreased by over 80%. In drilling fluid systems, this agent
demonstrates a temperature resistance of up to 180 ℃. At a 2% dosage, it provides excellent rheological and fluid-loss control
performance, significantly outperforming conventionally modified cellulose derivative materials. It holds promising application
prospects for high-temperature complex wells in ecologically sensitive areas.