摘要
针对烷基糖苷钻井液在现场应用中出现的问题，中原油田钻井液技术公司首次将阳离子烷基糖苷(CAPG)引入钻井液。CAPG钻井液的优化配方为：375 mL自来水+6% CAPG+0.6%降滤失剂LV-CMC+0.6%流型调节剂黄原胶+0.4%增黏剂HV-CMC+3%封堵剂WLP+0.4% NaOH+0.2% Na2CO3+24% NaCl+0.4%抗氧化剂NaHSO3。CAPG钻井液的相关性能测试结果表明，该钻井液体系在抑制性、抗温性、润滑性、滤液表面活性、抗污染性、降滤失性及储层保护等方面性能优良。岩屑一次回收率99.15%，相对回收率99.45%，相对抑制率91.4%，抗温达160℃，极压润滑系数0.097，滤液表面张力19.52 mN/m，滤失量4.0 mL，抗NaCl 36%（质量分数，后同），抗CaCl2 5%，抗膨润土10%，抗钻屑10%，抗水侵20%，抗原油10%，岩心的静态渗透率恢复值大于93%，动态渗透率恢复值大于92%。其各方面性能均优于烷基糖苷钻井液，在油气勘探开发中的应用前景良好。
Abstract
In view of the problems which were found in field application of alkyl glucoside drilling fluid, the cationic alkyl glucoside (CAPG) was firstly introduced into drilling fluid system by drilling fluid technology company of Zhongyuan oilfield. The optimum formula of CAPG drilling fluid was obtained as follows: 375 mL water, 6% CAPG, 0.6% filtrate reducer LV-CMC, 0.6% flow regulator xanthan gum, 0.4% thickening agent HV-CMC, 3% plugging agent WLP, 0.4% NaOH, 0.2% Na2CO3, 24% NaCl and 0.4% antioxidant NaHSO3. The performance test results showed that CAPG drilling fluid had excellent performances including inhibition, temperature resistance, lubricity, filtrate surfactivity, pollution resistance and reservoir protection, such as 99.15% cuttings first recovery, 99.45% cuttings relative recovery, 91.4% relative inhibition rate, 160℃ resistance temperature, 0.097 extreme pressure lubrication coefficient, 19.52 mN/m surface tension of filtration solution, 4.0 mL filtrate volume. Excellent pollution resistance was revealed, according to the mass fraction, the antipollution results were showed as follows: 36% NaCl, 5% CaCl2, 10% bentonite, 10% drilling cuttings, 20% water, 10% crude oil. The static core permeability recovery value was greater than 93%, and the dynamic permeability recovery value was greater than 92%. All the performance of CAPG drilling fluid was superior to that of alkyl glucoside drilling fluid. The application prospect of cationic alkyl glucoside was well in exploration and development of oil and gas.
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