FIELD: oil and gas production.
SUBSTANCE: invention relates to high-mineralization clayless drilling muds to expose producing reservoirs as well as when boring clays with tendency for softening during boring with aqueous drilling fluids and during making holes in salt-bearing formations. Drilling mud containing sodium format (9-30%) as stabilizer and weighting substance, marble powder (0-12%), and water contains sulfacell as regulator of rheological and fluid loss properties. Drilling mud may further comprise foam suppressor MAS 200 dissolved in diesel fuel at ratio 1:20 and in amount 0.2-0.4%.
EFFECT: enhanced flocculation properties of drilling mud to remove sludge during cleaning operation.
2 cl, 1 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| CLAYLESS DRILLING MUD | 2004 |
|
RU2277571C1 |
| DRILLING MUD | 2004 |
|
RU2277569C1 |
| MUDMAX INHIBITED DRILLING MUD | 2020 |
|
RU2737823C1 |
| SALT-TOLERANT DRILLING MUD FOR EXPOSING PRODUCING FORMATIONS | 2004 |
|
RU2277570C1 |
| CLAY-FREE DRILLING FLUID FOR COMPLETION OF FORMATIONS OF CONTROLLED DIRECTIONAL AND HORIZONTAL WELLS IN CONDITIONS OF ABNORMALLY HIGH FORMATION PRESSURES | 2010 |
|
RU2440397C1 |
| STRENGTHENED MINERALIZED BORING SOLUTION FOR THE OPENING OF PRODUCTIVE PLATES WITH ABNORMALLY HIGH PLASTIC PRESSURE | 2018 |
|
RU2683448C1 |
| WATER-BASED HIGH-MINERALIZED WEIGHTED MUD | 2013 |
|
RU2530097C1 |
| WEIGHTED MINERALIZED CLAYLESS DRILLING MUD | 2017 |
|
RU2655276C1 |
| HIGHLY INHIBITED CLAY-FREE EMULSION DRILLING MUD | 2018 |
|
RU2698389C1 |
| CLAY-LESS POLYSACCHARIDE DRILLING AGENT | 2009 |
|
RU2427605C1 |
