Low-soil-phase high-density calcium-resistant saturated salt water drilling fluid system
A high-density, soil-phase technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of water sensitivity of high salinity formations, reduce the compactness of mud cakes, and have great influence on rheology, and achieve resistance to water. Inferior soil has strong pollution ability, improved calcium resistance and low filtration effect
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[0033] Example 1
[0034] Weigh according to the amount of each component of Example 1 in Table 1, and add the drilling fluid in turn under high-speed stirring (11000 r / min).
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[0035] Example 2
[0036] Weigh according to the amount of each component of Example 2 in Table 1, and add the drilling fluid in turn under high-speed stirring (11000 r / min).
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[0037] Example 3
[0038] Weigh according to the amount of each component of Example 3 in Table 1, and add the drilling fluid in turn under high-speed stirring (11000 r / min).
[0039] Table 1 Example 1-3 Low-soil phase high-density calcium-resistant saturated brine drilling fluid system formula composition
[0040]
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