FIELD: oil and gas production. SUBSTANCE: water-based displacement fluid contains, wt. %: carboxymethylcellulose, 0.45-0.8; nitrilomethylphosphonic acid, 0.02-0.05; weighting agent, 0-70; and, additionally, carbonate alkali agent, 8-12. EFFECT: reduced water loss ensuring reliable separation of drilling fluids from grouting mortars due to eliminated thickening of contact zones and also ensured high sedimentation stability due to higher weight and prevented formation of sedimentation clogs and getting displacement fluid filtrate into production strata. 2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| UNIVERSAL BUFFER LIQUID | 2003 |
|
RU2253008C1 |
| COMPLEX POWDER COMPOSITION FOR STRUCTURED SPACER FLUID PREPARATION | 2010 |
|
RU2439118C1 |
| BASE OF WEIGHTED PLUGGING MORTAR | 2001 |
|
RU2194844C2 |
| COMPLEX REAGENT FOR HIGH-TEMPERATURE GROUTING MORTARS | 2005 |
|
RU2298576C1 |
| WEIGHTED BUFFER LIQUID | 1999 |
|
RU2154083C1 |
| COMPOSITION OF STRUCTURED BUFFER LIQUID | 2023 |
|
RU2813585C1 |
| BUFFER FLUID FOR SEPARATING DRILLING MUD AND CEMENTING FLUID | 0 |
|
SU1155723A1 |
| BASE OF A WEIGHTED HEAT-RESISTANT GROUTING SOLUTION | 2020 |
|
RU2763195C1 |
| EKOGUM POWDERY MIXTURE FOR PREPARATION OF DISPLACEMENT FLUID AND MUDS TREATMENT | 1992 |
|
RU2099504C1 |
| WEIGHTED DISPLACEMENT FLUID | 2014 |
|
RU2561134C1 |
