| 摘要 |
FIELD: oil and gas production. SUBSTANCE: invention, in particular, relates to drilling muds used when drilling high-permeation or unstable rocks and also for opening productive collectors with high residual water saturation. Fluid contains, wt %: polyacrylamide or polysaccharide 0.2-2.0, additive (product based on hydrolyzed synthetic fatty acid production still residues containing at least 1.7 mg-equiv/l of fatty acid soaps and no higher than 1.0 of free alkali on conversion to active principle) 0.1-0.5, and water - the balance. EFFECT: improved quality of fluid due to reduced rate of filtration, improved waterproofing properties of fluid with respect to permeable rocks, and retention of permeability for hydrocarbon liquid. 2 tbl
|
