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Si X.-Q.,Henan Institute of Engineering | Si X.-Q.,Drilling Fluids Technology Company | Si X.-Q.,China University of Petroleum - East China | Wang Z.-H.,Henan Institute of Engineering | And 6 more authors.
Oilfield Chemistry | Year: 2013

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°c 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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