Example 10
100 parts by weight of 3 #white oil and 6 parts by weight of an emulsifier (which was composed of 4 parts by weight of a primary emulsifier and 2 parts by weight of a secondary emulsifier) were taken and mixed at a stirring rate of 1,000 r/min for 10 min, 12 parts by weight of an organic clay was then added and blended at a stirring rate of 2,000 r/min for 10 min, 40 parts by weight of a calcium chloride aqueous solution (with a concentration of 25 wt %) was subsequently added and stirred at a stirring rate of 2,000 r/min for 10 min, 6 parts by weight of a wetting agent was further added and agitated at a stirring rate of 2,000 r/min for 10 min, 7 parts by weight of calcium oxide was then added and mixed at a stirring rate of 2,000 r/min for 20 min, 10 parts by weight of a filtrate reducer was subsequently added and blended at a stirring rate of 2,000 r/min for 20 min, 30 parts by weight of a weighting agent was further added and agitated at a stirring rate of 2,000 r/min for 20 min, 18 parts by weight of a plugging agent-S1 was subsequently added and stirred at a stirring rate of 2,000 r/min for 30 min, an oil-based drilling fluid (denoted as F10) was prepared.
The ingredients of F10 and contents thereof were shown in Table 1.
