SU1771480A3 - Method for treatment of water-based drilling mud - Google Patents

Description

The invention relates to well drilling. in particular to a method for processing water-based drilling fluids.

Known methods of processing clay drilling muds by introducing the still residues of FFA [1], into the drilling fluid saponified with alkali, still residues of FFA [2].

The disadvantages of these solutions are, in the first case, low efficiency and complexity of use associated with the consistency of the reagent, the limiting factor in the second case is the peculiarities of obtaining the reagent [3].

The closest technical solution to the proposed one is a method of processing water-based drilling fluids with distillation residues of FFA in diesel fuel.

The disadvantage of the known technical solution should be attributed to the insufficient efficiency of processing of drilling fluids in this way.

This goal is achieved by the fact that in the method for treating aqueous drilling fluids with a solution of synthetic fatty acids in a hydrocarbon liquid, according to the invention, a casting binder solution of a bottoms residue obtained by distilling synthetic fatty acids in a narrow range is used as a solution of synthetic fatty acids to a hydrocarbon liquid kerosene fraction in the amount of 1-15% of the volume of the drilling fluid. Foundry binder is produced by the Volgograd Refinery according to TU 38 10741-78.

Dissolving in the kerosene fraction, the bottoms components acquire high orientational mobility, as a result of which the conditions for the physicochemical interaction of the reagent with the drilling fluid components deteriorate, and deep emulsification of the hydrocarbon phase occurs in the volume of the drilling fluid.

Hereinafter, this product will be called reagent-PR.

The properties of the PR reagent are shown in Table 1.

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ABOUT

1771480 4

Example 1. In the preliminary prog. A roted bentonite suspension of 3% by weight, p = 1.025, was introduced with stirring a nitrone reagent in an amount of 0.3% by weight, per solution volume (in terms of dry half - 5 measurements). The solution was treated with PR reagent in an amount of up to 15%. volumetric. The solutions were thermostated for an hour at a temperature of 90 ° C. with stirring to stabilize the parameters. Measurement of parameters was carried out on standard devices every other day at room temperature.

: Table. 2 shows the properties of a polymer clay solution without additives and with additives of the PR reagent. ... fifteen

PRI me R 2. Prepared a potassium solution containing 7 May,% potassium chloride. Additives of oil and reagent PR were added to the resulting solution. The pH of the solution was maintained by the additional addition of alkali - 20 l.

Then the solutions were thermostated at a temperature of 90 ° C and after a day at room temperature the parameters were measured. 25

The results are shown in table. 3.

Example 3. Lime was introduced into the reagent PR with stirring in an amount of 7.5% (wt.) Based on the weight of the reagent. This composition was used to treat a solution that did not contain an antifoam agent. The solutions were evaluated for their ability to foam.

The results are shown in table. 4.

For example, 4. Pre-hydrated bentonite suspension /? = 35 = 1.03 g / cm ^{3 was} treated with a 1% solution of the cationic polymer -DKDRILL in an amount of 0.1; 0.2; 0.3 wt% based on polymer. In order to determine the effect of the composition of the hydrocarbon phase 40 on the properties of the polymer solution, 5% of the PR reagent and 5 vol.% Of dehydrated oil were introduced into the composition 1 with stirring.

By adding alkali, the pH of the solution was adjusted. creators. The compositions were thermostated at 45 90 ° C, the parameters were measured at room temperature, on the next day, the lubricity of the solution was evaluated using a Baroid type E device. Measurement principle; a metal disk with a diameter of 34.5 mm immersed in a solution. 3.5 mm high, rotating at a speed of 812.5 rpm. pressed against a metal prism with a selected load for 5 minutes. After that, the prism 55 is removed and the wear area is measured.

According to the formula

Rpl. = 533 ^ the film strength is calculated, where W is the load, lb / in ² ;

S is the area of wear on the prism, inch ² . The rate of filtration (fluid loss) of the drilling fluid was measured using a VM-6 device, the friction coefficient of the cake was measured using a CPC-2.

The results are presented in table. five.

The examples discussed above clearly show that solutions containing the PR reagent have lower fluid loss, better lubricating characteristics in comparison with untreated solutions.

From the data table. 1 shows that the addition of the PR reagent less than 1 wt% is not very effective, and more than 10% is economically inexpedient. The pH range, in which the PR reagent works well as a lubricating additive, lies in the range of 8-10 (Table 5). ...

Example 5. For comparison with the prototype, samples of KOSZhK in diesel fuel were prepared. Samples were prepared as follows; distillation residues of FFA were introduced into diesel fuel at a ratio of 50:50. At a temperature of 90 ° C, the samples were kept for 3 hours. A sample of distillation residues in diesel fuel DL after cooling stratified, the second sample of KOSZHK in diesel fuel DZ (winter) was obtained relatively stable at a ratio of 50:50. The obtained sample of KOSZhK in diesel fuel grade DZ and a sample of the foundry binder were subjected to comparative tests.

Table 6 shows the comparative data of the proposed invention and the known one.

From the analysis of the presented data, it is obvious that the proposed technical solution is more effective than the prototype in all technological parameters. So, filtration is reduced by 1.7 times, the strength of the film is increased by 1.5 times, and the friction coefficient is reduced. ... ...

Claims (1)

Claim A method for treating water-based drilling fluids by introducing a solution of synthetic fatty acids in a hydrocarbon liquid, which is distinguished by the fact that, in order to improve the lubricating and filtration properties of solutions, a foundry binder is used as a solution of synthetic fatty acids in a hydrocarbon liquid VAT residue obtained by distillation of synthetic fatty acids in a narrow kerosene fraction, in the amount of 1-15% of the volume of the drilling fluid. Table 1 Indicator name Norm 1 Appearance Homogeneous dark oily liquid 2 Mass fraction of water. % 0.3 3 Density, at 20 ° С, kg / m ^3, no more 900 4 Acid number, KOH per 1 g 25-55 five Flash point in an open crucible, not lower 54 ° C Table 2 p / p Additive to the solution reagent PR, vol _. % Indicators of properties of the solution ί sec P> g / cm ³ I f, 3 Pa j cm ³ I Pa ί mPa "s 1 1 Without additives 7 1.025 0/0 11 19 ι4 2 + 1% PR 7 1.025 0/1 9.5 22 15 3 + 5% PR 8 1.02 5/8 4.5 24 18 4 + 10% PR 13 1.01 7/15 2 * 5 39 23 5 + 15% PR 15 1.00 9/20 2.3 120 33 Note: the stock solution contains 3 wt% bentonite and 0.3 wt.% Nitrone reagent, calculated as polymer. Table 3. Solution composition, wt% Additive for solution, wt% Solution parameters —- Gl KOH | KCCG CIC T-66 CS1 n _g o B from r / CH ^J EPa Ф, I pH cm ² j KON | nR | Oil 1 five 0,4 3 0.3 7 7 The rest - - - ten 1.11 20/20 12.5 Yu, 5 new 30/35 ' 10.6 2 five . 0,4 3 0.3 7 7 Also - - 4.15 fourteen 1.1 12 3 five 0,4 3 0.3 7 7 '0.1 *>, 15 - 7 1.1 20/25 5.5 10.2 k five 0,4 3 0.3 7 7 0.04 2.05 2.05 eleven 1.1 65/70 4 10.65! five five 0,4 3 0.3 7 7 -AND- - - 8.3 23 1.09 20/40 ten 10.45 6 five 0,4 3 oh, 3 Ί 7 "·’ " 0.2 8.3 - five 1, oe 2 / 2.5 6 10.2 7 five 0,4 3 oh, 3 Ί 7 „41_ 0.1 4.15 4.15 25 1.09 45/60 4.5 10.05 • - d Table ¹ ! p / p Solution composition, wt% Additive for solution, wt% CaO ί Ttr66 | Oil [OL Solution parameters Gl KOH CSSC KSC CS1 _and n 0 T, sec hLm ' SNS _{4 / (0)} Pa ¢, cm ³ pH _βι> fifteen 2 5 3 5 0,4 0,4 0,4 3 0.3 5 Rem. - - - - 3 0.3 5 Rem. - 5 8.3 3 0.3 5 Rem. 0.09 - - 12 13 1.09 50/60 10 10.7 10 9 1, 08 30/40 9.5 S, 5 4 8 1.08 25/30. 4 10.4 2 Tables ·; 1YAG p / i Sows "p" st "hmm, May." Pact parameters Note Gly on | DC-Drilt con r ί “ 1: -1 '₽ · r / s "1 “” “., I ♦. (he is 1 ’EL · | si’ | I ί 1., t, Ito I ml "* s CORII. MPa 4 0.1 ten 1.03 7 / e 13.0 9.1 - - 0.0349 Manos Without becoming. 2 AND 0.2 1E 1.03 10/12 10.0 3.21 49 15.7 0.0437 Then to F-p flocculated J 6 0.J 50 1.0) 70/80 4.0 9.0 - - 0.0542 · ♦ "· 4 H 0.1 5.0 - 17 1.025 37/43 4.0 7.45 47 10.5 0.0548 14.9 five 4 0.1 0.1 5.0 - 17 1.025 27/40 4.5 8.37 62 18.7 0.0481 19.4 6 4 0.1 0.2 5.0 12 1.025 6/8 4.0 9.44 44 eleven 0.0218 19.4 1 4 0.1 5.0 10.7. 1.025 18/34 4.0 9.13 43 10.4 0.0437 5.78 Partially entered oil eight 4 0.1 0.05 ... 5.0 10.5 1.025. 10/23 5.8 10.02 24 13.4 0.1341 7.44 N "" walks nine 4 0.1 0.1 - 5.0 3.5 1.025 5/13 6.2 10.98 fourteen 12.6 0.1718 7.4 Also Table b HW Added to p / p solution While. hotels properties of solution ra Antiwear Notes 7.0. ... 0, ciic g. V TIMM € C4p dPa mPa s dPa »· - ····· - PlUf NA 1 Without additives 7 6.5 0/1 nineteen 35 0.0875 . ·· *! Wear on the entire surface of the prism 2 1% PR eight 5: 2 1/2 21 41 0.0745 7A.5 The drilling fluid is homogeneous 3 2% PR nine M 2/4 23 52 0.0481 16.5 The drilling fluid is homogeneous 4 3% PR eleven 3.7 3/6 26 60 0.034E 16.0 The drilling fluid is homogeneous five 1% KOSYAK in design fuel eight 5.0 1/2 nineteen 39 0.0787 9.7 On the surface of the film KOSYAK 6 21 SCATTER on diesel fuel eight 5.5 1/2 nineteen 45 0.0659 10.0 On the surface of the film KOSYAK 7 3% KOSYAK in design nine 5.0 2/4 20 50 0.0524 10.5 Flakes on the surface fuel KOSYAK Note: the polymer solution is prepared on the basis of a preliminary hydrated suspension treated with 0.5% (calculated on dry matter) hydrolyzed polyacrylonitrile.