FIELD: oil and gas production.
SUBSTANCE: invention relates to drilling oil and gas wells, namely to clayless biopolymer drilling muds used to expose productive formations of horizontal wells and inclined wells deviating from vertical by more than 1000 m, represented by carbonate and terrigenous reservoirs, as well as to restore wells by drilling second wellbores under different geologic conditions. Drilling mud contains, wt %: biopolymer (ASG-1 or Ritizan-M) 0.3-0.8, modified starch 1.0-2.5, organic inhibitory additive (FK-2000 Plus M) 8-12, potassium chloride 1.5-3.0, marble crumb 1.5-3.0, and water - the rest.
EFFECT: reduced drilling mod filtration and enhanced surface-active properties with regard to formation fluid.
1 tbl, 4 ex
| Title | Year | Author | Number |
|---|---|---|---|
| HIGHLY INHIBITION DRILLING FLUID | 2021 |
|
RU2777003C1 |
| CLAY-FREE DRILLING FLUID FOR COMPLETION OF FORMATIONS OF CONTROLLED DIRECTIONAL AND HORIZONTAL WELLS IN CONDITIONS OF ABNORMALLY HIGH FORMATION PRESSURES | 2010 |
|
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| DRILLING MUD | 2015 |
|
RU2661172C2 |
| HYDROGEL DRILLING FLUID | 2023 |
|
RU2804068C1 |
| CLAYLESS DRILLING MUD BASICALLY DESIGNED FOR BORING HORIZONTAL HOLES (VERSIONS) | 2001 |
|
RU2186819C1 |
| POLYMERIC DRILLING FLUID FOR EXPOSING PRODUCTION FORMATIONS | 2004 |
|
RU2266312C1 |
| MUDMAX INHIBITED DRILLING MUD | 2020 |
|
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| CLAY-LESS POLYSACCHARIDE DRILLING AGENT | 2009 |
|
RU2427605C1 |
| DRILL MUD FOR PRIMARY OPENING OF PRODUCTIVE FORMATION | 2018 |
|
RU2695201C1 |
| INHIBITING BIOPOLYMER SOLUTION | 2020 |
|
RU2756264C1 |
