RU2119938C1 - Addition agent for the drilling fluid - Google Patents

Abstract

FIELD: hole drilling. SUBSTANCE: addition agent has the following components, wt. -%: nonionogenic surface-active substance of hydroxyalkylated type, 12-35; methyldiethylalkoxymethylammonium methyl sulfate of the general formula [C₁₀-C₁₈H_21-27OCH₂N(CH₃)(C₂H₅)₂]⁺SO₄CH $\genfrac{}{}{0ex}{}{\text{-}}{\text{3}}$ or bis-(alkylpolyhydroxyethylene)-phosphate of the general formula [C_nH_2n+1O(C₂H₄•O)_n]₂POOH where n = 8; m = 6, or alkyl phosphate based on C₁₀-C₁₈-higher aliphatic alcohol or alkylbenzyldimethyl-ammonium chloride of the general formula C₁₀-C₁₈H_21-37N(CH₃)₂CH₂C₆H₅]Cl^- or their mixture, 10.5-15; and hydrocarbon solution, the balance. Addition agent can be used in oil production industry. EFFECT: improved property and effectiveness of addition agent. 3 tbl

Description

 The invention relates to drilling, in particular to improving the operational properties of drilling fluids, and can be used in the oil industry.

A well-known drilling fluid additive, including the condensation product of bottoms of synthetic fatty acids with monoethanolamine and hydroxyethylated alkyl phenol and bottoms of the production of synthetic fatty alcohols of fraction C ₇ -C ₉ , or a mixture thereof (ed. St. N 1627554, MKI C 09 K 7 / 02, 1991). This additive contains a complex mixture of bottoms of production residues having an unstable composition, which leads to inconsistency of properties; and has a pour point of minus 10 to minus 16 ^o C, which makes it unsuitable for use in lower temperatures.

A well-known drilling fluid additive, including the condensation product of monoethanolamine and crude tall oils and a by-product with a boiling point of not higher than 165 ^o C production of butyl alcohols by the method of oxosynthesis from natural gas from the stage of rectification of normal butanol (ed. St. N 1792959, C 09 K 7 / 02, 1993).

 The disadvantages of this additive are: inconsistent composition of the products used, not enough high lubricity.

 Closest to the proposed invention is a drilling fluid additive comprising a mixture of block copolymers of ethylene and propylene oxides and an alkyloxyethylated amine and an aromatic solvent (ed. St. N 1313860, C 09 K 7/06, 1987) - XT-48 reagent. However, the HT-48 additive is not effective enough for various drilling fluid compositions and does not have a sufficiently low pour point.

 The basis of the present invention is the creation of additives for drilling mud with high defoaming efficiency, lubricity, improved rheological properties, resistance to salt aggression and low pour point.

The problem is solved in such a way that the drilling fluid additive, which includes a non-ionic surfactant of an oxyalkylated type and a hydrocarbon solvent, additionally contains methyldiethylalkoxymethylammonium methyl sulfate of the general formula
[C _10-18 H _21-27 OCH ₂ N (CH ₃ ) (C ₂ H ₅ ) ₂ ] ⁺ SO $\genfrac{}{}{0ex}{}{\text{-}}{\text{4}}$ CH ₃ ,
or bis (alkylpolyoxyethylene) phosphate of the general formula
[C _n H _{2n + 1} O (C ₂ H ₄ O) _m ] ₂ POOH,
Where
n = 8-10, m = 6, or alkyl phosphate based on higher fatty alcohols, with the number of carbon atoms C ₁₀ -C ₁₈ , or alkyl benzyl dimethyl ammonium chloride of the general formula
[C _10-18 H _21-37 N ⁺ (CH ₃ ) ₂ CH ₂ C ₆ H ₅ ] Cl ^-
in the following ratio of components, wt.%:
Non-ionic surfactant, oxyalkylated type - 12 - 35
Methyldiethylalkoxymethylammonium methyl sulfate of the general formula
[C _10-18 H _21-27 OCH ₂ N (CH ₃ ) (C ₂ H ₅ ) ₂ ] ⁺ SO $\genfrac{}{}{0ex}{}{\text{-}}{\text{4}}$ CH ₃
or bis (alkyl polyoxyethylene) phosphate of the general formula [C _n H _{2n + 1} O (C ₂ H ₄ O) _m ] ₂ POOH, where n = 8 - 10, m = 6, or alkyl phosphate based on higher fatty alcohols, with the number of carbon C ₁₀ -C ₁₈ atoms or alkylbenzyldimethylammonium chloride of the general formula [C _10-18 H _21-37 N ⁺ (CH ₃ ) ₂ CH ₂ C ₆ H ₅ ] Cl ^- or mixtures thereof - 10.5 - 15
Hydrocarbon Solvent - Else.

As a non-ionic surfactant of the oxyalkylated type, the additive contains the product of the addition of ethylene and propylene oxides to ethylene diamine - Diproxamine 157 - 65 M according to TU 6-14-614-76 or Proxamine NR-71 (Reference "Surfactants" under the editorship of A.A. Abramzon, L.: "Chemistry", 1979, p. 315) or the product of addition of ethylene and propylene oxides to alkylphenol is a trademark of Prevocel GE 10/16 (Buna Germany), or the product of addition of ethylene and propylene oxides to fatty alcohols - Genapol B-211 ("Hoechst" Germany, "Surface phenomena I and surfactants "under the editorship of A.A. Abramzon, L .; Chemistry 1984, p.246), or the product of the addition of ethylene and propylene oxides to polyhydric alcohols - Laprol 3663 according to TU 6-05-1854-78, or the product of the addition of ethylene oxide to a fatty amine - Oxamine L-15, or the product of the addition of ethylene oxide to fatty alcohols - Preparation 0-18, or the product of the addition of ethylene oxide to fatty acids - Laurox-9 (Reference "Surfactants" under. ed. A.A. Abramzona, L .: Chemistry, 1979, p.303, 306, 309), or ethoxylated alkyl phenols - Neonols AF _9-p , where n = 4, 6, 10, 12 according to TU 38-507-63- 300-93.

Methyldiethylalkoxymethylammonium methyl sulfate of the general formula [C _10-18 H _21-27 OCH ₂ N (CH ₃ ) (C ₂ H ₅ ) ₂ ] ⁺ SO $\genfrac{}{}{0ex}{}{\text{-}}{\text{4}}$ CH ₃ has the technical name Alkamon D and is produced according to TU 6-14-19-28-86.

Bis (alkylpolyoxyethylene) phosphate of the general formula [C _8-10 H _16-21 O (C ₂ H ₄ O) ₆ ] ₂ POOH has the technical name Oxyphos KD-6 and is produced according to TU 6-02-1148-78.

Alkyl phosphates based on higher fatty alcohols (fractions C ₁₀ -C ₁₈ ), technical name Polyphos 108 (Chistyakov B.E., Polkovnichenko IT, Chaplanov P.E. et al. Phosphorus-containing surfactants - M .: TSNIITEneftekhim, 1979. - Tem. review - p. 6-8).

Alkylbenzyldimethylammonium chloride of the formula [C _10-18 H _21-37 N ⁺ (CH ₃ ) ₂ CH ₂ C ₆ H ₅ ] Cl ^is catamine according to TU 6-01-816-95.

 As a solvent, the proposed additive contains a mixture of aromatic hydrocarbons - Nefras Ap 120/200 according to TU 38-101809-90 or ethylbenzene fraction (EBF) according to TU 38.30225-81, or diesel fuel according to GOST 305-82, or ethyl alcohol according to GOST 17299- 78, or isopropyl alcohol (IPS) according to GOST 9805-84 or butyl alcohol (BS) according to GOST 5208-81, or mixtures thereof.

 An analysis of the well-known technical solutions selected in the search process showed that in science and technology there is no object similar in terms of the claimed combination of features and advantages, which allows us to conclude that the criteria of “novelty” and “inventive step” are met.

 To prove the compliance of the proposed solution with the criterion of "industrial applicability" we give examples of the preparation of the additive.

Example No. 1 (prototype)
A sample of the reagent HT-48 is taken in finished form.

Example No. 2 (proposed)
To 12 g of Genapol B-211 add 15 g of Alcamone D, mix, add 73 g of Nefras Ap 120/200 solvent, heat to 60 ^o C, mix thoroughly until a homogeneous solution is obtained.

 Similarly perform examples 3, 4, 5, 12, 13, 15, 16, 17, 20, 21, 25, 32, 33, 36, 37, changing the quantitative and qualitative ratio of the components according to the table. one.

 Example 6

To 23.5 g of Genapol B-211 add 10.5 g of Polyphos-108, previously dissolved in 20 g of technical ethyl alcohol, mix thoroughly, add 46.0 g of Ap 120/200 nephras, heat to 60 ^o C and mix until homogeneous solution.

 Examples 7, 14, 15, 18, 19, 21, 22, 23, 24, 26, 27, 28, 31, 34, 35, 38, 39 are performed similarly, changing the quantitative and qualitative ratio of the components according to the table. one.

 Example 8

To 23.5 g of Genapol B-211 add 10 g of Alcamone D and 5 g of Oxyfos-6, add 61.5 g of solvent - EBP, heat to 60 ^o C and mix thoroughly until a homogeneous solution is obtained.

 Example 9

To 23.5 g of Genapol B-211, add 5 g of Oxyphos-6 and 47.5 ml of Nephras Ap 120/200, mix until completely dissolved, then add 10 g of Polyphos 108, previously dissolved in 20 g of technical ethanol, the mixture is heated to 60 ^o C and stirred until a homogeneous solution.

 Similarly prepare examples 10, 11, 29, 30.

 Example 40

To 21.5 Neonol Af 9-4 add 12 g of Alkamon D and 49 g of Nefras Ap 120/200, mix thoroughly, add 2.5 g of Neonol Af 9-10, dissolved in 15 g of technical ethyl alcohol, the mixture is heated to 50 ^o C and stirred until a homogeneous solution. Similarly, according to table. 1 prepare examples 41, 44, 45.

 Example 42

To 21.5 g of Neonol Af 9-4 add 46 g of EBF, mix thoroughly, then add 2.0 g of Neonol Af 9-12 and 10.5 g of Polyphos 108 dissolved in 20 g of isopropyl alcohol, the mixture is heated to 50 ^o C and mixed until a homogeneous solution.

 Similarly prepare examples 43, 46, 47.

 Example 48

To 12 g of Genapol B-211, 17.5 g of Neonol Af 9-4 and 10.5 g of Alkamon D are added, then 38 g of Nefras Ap 120/200 are added, the mixture is stirred until complete dissolution, then 2.0 g of Neonal Af 9 is added. -10, dissolved in 20 g of technical ethyl alcohol, is heated to 60 ^o C and stirred until a homogeneous solution. Similarly prepare examples 49, 52, 54, 58, 60, 62.

 Example 50

To 15 g of Diproxamine D-157 add 18 g of Neonol Af 9-4.25 g EBF, mix thoroughly, add 1.5 g Neonol Af 9-10, 10.5 g Polyphos-108 dissolved in 20 g of isopropyl alcohol, a mixture heated to 50 ^o C and stirred until a homogeneous solution. Similarly prepare example 57.

 Example 53

To 18 g of Proxamine HP-71 add 11.0 g of Neonol AF9-6, 5.5 g of Oxyphos-6 and 39 g of EBF, the mixture is stirred, add 1.5 g of Neonol Af 9-12.5 g of Polyphos-108, dissolved in 20 g of isopropyl alcohol, the mixture is heated to 50 ^o C and stirred until a homogeneous solution. Similarly prepare examples 55, 57, 59, 61, 63.

The resulting drilling fluid additive is a light yellow to dark brown fluid with a density of d $\genfrac{}{}{0ex}{}{\text{20}}{\text{4}}$ = 830-1120 kg / m ³ , viscosity η = 8-86 mm ² / s and pour point below minus 35 ^o C.

 The additive is tested on a drilling fluid prepared in accordance with TU 39-9-22-74, the tests are carried out according to RD 39-2-645-81 "Methodology for monitoring the parameters of drilling fluids."

The effectiveness of the additive is evaluated by the following indicators: K _p - coefficient of density recovery, which is the ratio of the density of the solution after entering the additive (ρ) and the original (ρ _ref ) - characterizing antifoam properties.

K_т - коэффициент тиксотропии, характеризующий реологические свойства бурового раствора и представляющий собой отношение CHC 10/CHC 1, где CHC - предельное статическое напряжение сдвига во времени соответственно за 10 и 1 мин;
σ - - межфазное натяжение фильтрата бурового раствора с добавкой присадки на границе с гептаном, мН/м, характеризует поверхностно-активные свойства присадки;
θ^° - угол смачивания фильтрат-гептан, характеризует смачивающие и гидрофобизирующие свойства присадки.

K _t - thixotropy coefficient characterizing the rheological properties of the drilling fluid and representing the ratio CHC 10 / CHC 1, where CHC is the ultimate static shear stress in time for 10 and 1 min, respectively;
σ - is the interfacial tension of the drilling fluid filtrate with the addition of an additive at the border with heptane, mN / m, characterizes the surface-active properties of the additive;
θ ^° is the wetting angle of the filtrate-heptane, characterizes the wetting and hydrophobizing properties of the additive.

 The test results are presented in table. 2 at an additive concentration of 0.75% by weight of the drilling fluid.

An increase in resistance to salt aggression while reducing surface tension is achieved by using water-and oil-soluble surfactants in the additive of equimolar compositions (Example 48 - 65 of Table 1). The results are presented in Table. 3 for drilling mud treated with 10% NaCl solution, 5% CaCl ₂ solution, 5% MgCl ₂ solution.

In the table. 3 presents the test results of the proposed additive for resistance to salt aggression (salt tolerance), which is characterized by the preservation of the thixotropy coefficient and the coefficient of density recovery when processing a drilling fluid containing an additive with saline solution (10% NaCl; 5% CaCl ₂ ; 5% MgCl ₂ .

 Analysis of the data given in table. 2 and 3 shows that the proposed additive has a high defoaming efficiency, lubricity, improved rheological properties, resistance to salt aggression and low pour point.

Claims (1)

A drilling fluid additive comprising a non-ionic surfactant of an oxyalkylated type and a hydrocarbon solvent, characterized in that it further comprises methyldiethylalkoxymethylammonium methyl sulfate of the general formula

or bis (alkylpolyoxyethylene) phosphate of the general formula [C _n H _{2n + 1} O (C ₂ H ₄ O) _m ] ₂ POOH, where n = 8 - 10, m = 6, or alkyl phosphates based on higher fatty alcohols with the number of carbon atoms C ₁₀ - C ₁₈ , or alkylbenzyldimethylammonium chloride of the general formula [C _10-18 H _21-37 N ⁺ (CH ₃ ) ₂ CH ₂ C ₆ H ₅ ] Cl ^- , or a mixture thereof in the following ratio, wt.%:
Non-ionic surfactant, oxyalkylated type - 12 - 35
Methyldiethylalkoxymethylammonium methyl sulfate of the general formula

or bis (alkylpolyoxyethylene) phosphate of the general formula [C _n H _{2n + 1} O (C ₂ H ₄ O) _m ] ₂ POOH, where n = 8 - 10, m = 6, or alkyl phosphates based on higher fatty alcohols with the number of carbon atoms C ₁₀ - C ₁₈ , or alkylbenzyldimethylammonium chloride of the general formula [C _10-18 H _21-37 N ⁺ (CH ₃ ) ₂ CH ₂ C ₆ H ₅ ] Cl ^- , or mixtures thereof - 10.5 - 15
Hydrocarbon Solvent - Remaining

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