FIELD: oil and gas production.
SUBSTANCE: drilling mud for productive formation entering includes water, stabiliser of filtration and structure rheological indices and structure-forming agent, xanthane bio-polymer is used as structure-forming agent, the mixture of triethanolamine and toll oil is used as stabiliser of filtration and structure rheological indices with the following component ratio, wt %: bio-polymer 0.2-0.4, triethanolamine 5-10, toll oil 3-4, water is the rest. Note that the drilling mud can additionally include carbonate weighting additive taken in quantity necessary for obtaining drilling mud of design density.
EFFECT: improvement of structure rheological characteristics at low speed of mud flowing and reduction of filtration index value.
2 cl, 3 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| DRILLING AGENT | 2007 |
|
RU2362793C2 |
| ALCOHOL DRILLING FLUID | 2012 |
|
RU2501828C1 |
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|
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| WEIGHTED MINERALIZED CLAYLESS DRILLING MUD | 2017 |
|
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|
RU2601635C1 |
| DRILLING FLUID FOR FLUSHING OF LONG-DISTANCE STEEPLY INCLINED WELLS UNDER CONDITIONS OF PERMAFROST AND HIGHLY COLLOIDAL CLAY ROCKS, AND ITS APPLICATION METHOD | 2011 |
|
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| INHIBITING BIOPOLYMER SOLUTION | 2020 |
|
RU2756264C1 |
| HIGHLY INHIBITED CLAY-FREE EMULSION DRILLING MUD | 2018 |
|
RU2698389C1 |
| MUDMAX INHIBITED DRILLING MUD | 2020 |
|
RU2737823C1 |
| HIGHLY INHIBITION DRILLING FLUID | 2021 |
|
RU2777003C1 |
