SU1126589A1 - Reagent for treating invert-emulsion drilling muds - Google Patents

Abstract

1. REAGENT FOR TREATING INVERTED EMULSION DRILLING SOLUTIONS, containing a filler modified with an organosilicone liquid, characterized in that, in order to increase the strength of the drilling fluids and the amount of clay intensity, the reagent contains - thermal zone heat. % by weight: Si0238-51 AljO, 17-24 Fe.O, 6-8 MgO1.1-1.6 CaO2.8-4.5 Other impurities Else, the reagent ingredients taken in the following ratio, wt. %: Ash - ablation of thermal power plants 99.7-99.8, organosilicon silicon Liquid 0.2-0.3 S 2. Reagent according to claim 1, characterized in that the filler is modified with a silicone fluid, sodium methyl silicate or sodium ethyl silicate. §

Description

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The invention relates to the oil industry, in particular to the drilling of oil and gas wells using oil-based drilling fluids.

A known method of treating hydrocarbon-based bzgrovyh solutions, which consists in the fact that leather dust is introduced into the solution as a filler.

The disadvantage of this treatment method is the loss of stability of the solutions upon their elimination up to 8 g / cm, which is important for preventing the emission of oil or gas.

The closest technical solution to the invention is a reagent for treating invert emulsion drilling muds with modified aerosil and / or white carbon in an amount of 0.1–5 wt.%. At the same time, aero.sil is modified with the groups —OH, -0 (CH2) 2COOH and / or —CH;}, and the soot soot has dimethyldichlorosilane 2J,

The disadvantages of treating drilling fluids with these reagents are loss of stability when they are adjusted to a shot frequency of more than 0.2 g / cm, low clay content (susceptibility to slimeing of drill cutting up to 40%) and the use of expensive raw materials (5–11 thousand rubles for 1 t. depending on the type of modifier used).

The purpose of the invention is to increase the stability when ut invert emulsion drilling muds and their clay content are desired.

This goal is achieved by the fact that the reagent for the treatment of inert emulsion drilling fluids, containing a modified silica gel filler, as the latter contains ashes of thermal power plants of the following composition, wt.%:

SiO 38-51

Aljo 17-24

 6-8

M O M-1.6

CaO 2.8-4.5

Other

impurities Rest and the ingredients of the reagent are taken up in the following ratio, wt.%:

Ash - heat loss

power plants 99.7-99.8

Organosilicon,;

cal liquid 0,2-0,3

The reagent contains sodium methylsiliconate or sodium ethylsiliconate as organosilicon liquid.

Ash - TPP ablation is an unburned part of coal consisting of heterogeneous particles of organic and mineral origin. Mineralogical | 5: the composition of fly ash TPPs is represented by amorphous clay matter, carbonaceous residues, glass (colorless and colored) and crystalline phase in the form of quartz, mullite, hematite, and occasionally field Spar.

The choice of silicone fluids GKZH-10 and GKLS-11, among other reasons, is based on the fact that they are manufactured on the basis of the domestic industrial scale and are the cheapest (70 kop. 1 kg), are physiologically harmless and, with maximum ease of application, provide the possibility of mass production of modified ash - ablation TPP.

Modification of fly ash TPPs is carried out using the mechanochemical method (1-2 hours), followed by drying at 140-180 ° C for 1-1.5 hours to fix the modifier on the surface.

The average diameter of the modified particles of ash - ash TSZ 1-10 microns. 5 И-р and мер 1. 997 g of fly ash of TPP composition, wt.%:

SiO-z 45.0

AljO 24.0

RegO7.0

MgO1.5

CaO3,5

Other impurities of 19.0 and 30 g of sodium methylsiliconate (NGL-10) are stirred in a ball mill for 5 hours for 1.5 hours. To fix the modifier on the surface of ash particles of the TPP, the reagent is held for 1.5 hours at 180.i.

Reagent is injected into inert emulsion drilling solutions with continuous stirring (until a homogeneous state is obtained) in an amount of 1.0-6.0 wt.%.

Example 2. Prepared invert 5 emulsion drilling mud (by known technology) by mixing for 20 min on a laboratory mixer the calculated amount of the aqueous phase (mineralized water, saturated with NaCl (200 ml) and the hydrocarbon environment of diesel fuel (200 ml) with emulsifier - emultal (16.84, 0%).

In the prepared emulsion was injected gradually in small portions with continuous stirring for 10 minutes ashes - TPP ash, modified with 0.25 wt.% Of NGL-10, in an amount of 3 wt.% (12.6 g) (Tables 1 and 2 , solution 2).

Example 3. Prepare an invert emulsion solution by stirring for 20 minutes on a mixer of a hydrocarbon medium (200 ml) of diesel fuel in which an emulsifier (18 g - 6%), namely, a fatty acid salt, is dissolved. (CJC-C Q) and monoethanolamine, and the aqueous phase, which is a coherent solution of calcium hydroxide (132 g). .

In the resulting emulsion, the ash — the TPP ablation, modified by 0.3% by weight of NGL-11, in an amount of 1% by weight (3 g) (Table; 1 and 2) was gradually added in small portions with continuous stirring for 10 minutes. solution 9)

In tab. 1 and 2 presents the compositions and parameters of the resulting drilling fluids.

The amount of 0.2-0.3% by weight of NGL-10 or NGL-11 is explained by the fact that in this case a chemisorbed monomolecular layer c is formed on the surface of ash particles — the ash of the TPP. oriented carbon

hydrogen radicals, which gives the particles of ash - ablation maximum hydrophobicity. The amount of 0.3 wt.% Leads to layering on the primary chemisorbed layer of a layer with a disordered orientation, often weakly bonded to the surface, with the result that the hydrophobicity decreases, which degrades the quality of hydrocarbon-based drilling fluids.

The amount of 1-6 wt.% Of modified fly ash from TPPs is due to the fact that in this case the densest covering of the particles with emulsion globules occurs, in piesyiibfa-r those of which the drilling fluid has the greatest stability.

As can be seen from the above examples, the introduction of ash — entrainment of thermal power plants with modified silicone fluids GYUK-10 or GKZH-11, the surface u, allows to increase the stability when Q-19% invert emulsion drilling muds and their clay content are 15–23%. This is probably due to both the greater mechanical strength of ash particles — TPP ablation, which is a mixture of heat-treated aluminosilicates, as compared to amorphous aerosil particles, and the fact that, upon interaction of ash — TPP ash with organic liquid GKZh- 10 or NGL-11, along with bonds of 6-0 (as in the case of aerosil), Ab-O-- bonds of which are higher are formed as well.

Table 2

Claims (2)

1. REAGENT FOR TREATMENT OF INVERT EMULSION DRILLING SOLUTIONS, containing a filler modified with an organosilicon liquid, characterized in that, in order to increase stability during weighting of drilling fluids and their clay content, the reagent contains a zone of entrainment of thermal power plants as a filler next composition May.%: SiO ₂ 38-51 ai ₂ o, 17-24 Fe.O, 6-8 Ngs ³ 1.1-1.6 CaO 2.8-4.5 Other impurities Rest with the ingredients reagent taken the following ratio, wt.%: Ash - entrainment of thermal power plants 99.7-99.8, · Organosilicon liquid 0.2-0.3 2. The reagent according to claim 1, characterized in that the filler is modified with an organosilicon liquid — sodium methylsiliconate or sodium ethylsiliconate. sl sl 00 se 1 1126589 2