FIELD: oil, gas and coke-chemical industries.
SUBSTANCE: invention relates to oil and gas industry. Weighted saline drilling fluid for the opening of productive layers with abnormally high reservoir pressure contains, wt. %: sodium formate 37–40; polysaccharide of the xanatan type “Glamin” 0.20–0.25; modified starch "MK-3" 1.10–1.20; hydrophobic liquid "Basis-GS" 1.00–1.20; lubricant additive "SMEG" 1.25–1.50; Polydefom defoamer 0.15–0.20; clogging additive MP-4 10; water is the rest; weighting additive to the required density in excess of 100 wt. %.
EFFECT: technical result is preservation of reservoir properties and prevention of complications during drilling and primary opening of productive formations in conditions characterized by high bottomhole temperatures and abnormally high reservoir pressures.
3 cl, 1 dwg, 2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| WEIGHTED MINERALIZED CLAYLESS DRILLING MUD | 2017 |
|
RU2655276C1 |
| MUDMAX INHIBITED DRILLING MUD | 2020 |
|
RU2737823C1 |
| HIGHLY INHIBITED CLAY-FREE EMULSION DRILLING MUD | 2018 |
|
RU2698389C1 |
| DRILLING MUD FOR WELL CONSTRUCTION UNDER CONDITIONS OF ABNORMALLY HIGH FORMATION PRESSURES AND HIGH TEMPERATURES | 2019 |
|
RU2728910C1 |
| WEIGHTED INVERT-EMULSION DRILLING MUD | 2017 |
|
RU2655035C1 |
| WEIGHTED INHIBITED DRILLING MUD | 2017 |
|
RU2655281C1 |
| DRILLING FLUID FOR FLUSHING OF LONG-DISTANCE STEEPLY INCLINED WELLS UNDER CONDITIONS OF PERMAFROST AND HIGHLY COLLOIDAL CLAY ROCKS, AND ITS APPLICATION METHOD | 2011 |
|
RU2483091C1 |
| WEIGHTED DRILLING MUD ON HYDROCARBON BASE | 2019 |
|
RU2733622C1 |
| CLAY-FREE DRILLING FLUID FOR COMPLETION OF FORMATIONS OF CONTROLLED DIRECTIONAL AND HORIZONTAL WELLS IN CONDITIONS OF ABNORMALLY HIGH FORMATION PRESSURES | 2010 |
|
RU2440397C1 |
| CLAYLESS LOADED DRILLING MUD | 2011 |
|
RU2481374C1 |
