Biology modified silicate drilling fluid system
A biological modification and silicate technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of shale collapse, wellbore pressure imbalance, etc., and achieve good environmental protection performance and good compatibility. Effect
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[0026] Put 20m3 of fresh water in the circulation pool, mix it well and make it into a pre-hydrated soil slurry. The hydration time of the pre-hydrated slurry should not be less than 6 hours. Add 30kg xanthan gum, 150kg low-viscosity polyanionic cellulose, 900kg sulfonated phenolic resin, 1500kg methyl glucoside, 600kg non-penetrating treatment agent, 600kg / m3 hydroxyl film-forming agent, 600g low-fluorescence asphalt , 600kg of extreme pressure lubricant, 900kg of sodium silicate, 900kg of potassium chloride, add fresh water to 30m3, and stir well to form the drilling fluid system described in this article.
[0027] Present embodiment also can use seawater, if be seawater, should add 450kg caustic soda earlier, the soda ash of 300kg, react not less than 30 minutes after adding alkali. Then add components such as bentonite, specifically the same process as the above-mentioned method using fresh water.
[0028] Performance experiment data of prepared water-based bio-modified s...
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