Preparation method of multielement silicon water based well drilling liquid
A drilling fluid and silicon water-based technology, applied to drilling equipment, etc., can solve problems such as high interface permeability, poor cementing quality, and poor hydrophilicity, so as to improve cementation strength, channeling resistance, and mud cake strength Effect
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[0008] The preparation method of the multi-silicon water-based drilling fluid is as follows: the base slurry formed by 4.5-5.5 parts of bentonite, 0.15-0.25 parts of anhydrous sodium carbonate and 94.75-94.85 parts of clear water is prepared by adding 2-7 parts of silanol binder 1-6 parts of carboxymethyl cellulose and 2-5 parts of film-forming agent to make multi-silicon solution, add 1.0-2.0 parts of multi-silicon solution to 100 parts of base slurry, and then add organic silicon humic acid 0.5-1.0 parts of potassium and 0.5-1.0 parts of sulfonated tannin extract, just stir evenly; and the molecular formula of the silanol binder is Na 2 O nSiO 2 +3K 2 O mSiO 2 , wherein n=1.5-2.5, m=1.5-3.5; the molecular formula of carboxymethylcellulose is (C 6 h 9 o 4 ·OCH 2 COOH) n , where n=230-260; the molecular formula of the film-forming agent is CH 3 Si(OH)OHa. The specific preparation scheme of polysilicon solution is as follows:
[0009] Add 1.0-2.0 parts of the above ...
Embodiment 1
[0012] Example 1. During the construction of Well Xing 1-320-18 in Daqing, the multi-component silicon drilling fluid prepared in Scheme 1 in the above table was used. The secondary sound change was reduced by 1.20% compared with the primary sound change. The rheological property was reasonable and the inhibition was strong. The well diameter is regular, 98.1% of the well intervals are completely cemented at the first and second interfaces, the construction process is simple, the cost is low, the drilling fluid mud cake is thin, and the cementation strength of the second interface is high.
Embodiment 2
[0013] Example 2. During the construction of Well Xing 1-332-22 in Daqing, the multi-silicon drilling fluid prepared in Scheme 2 of the above table was used, and the secondary sound change decreased by 0.77% compared with the primary sound change. It is not because the content of multi-silicon is more The more the better, but in this program is the best, the cementing quality is in the best state.
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