SU857210A1 - Hydrophobic emulsion solution for drilling and damping wells - Google Patents

Description

one

The invention relates to the oil industry, in particular to hydro, phobic-emulsion solutions used in drilling and killing wells.

Known invert emulsion drilling muds, including water with varying degrees of mineralization, oil and emulsifier from the class of esters of unsaturated higher acids and polyatomic alcohols l.

However, these solutions have low stability and low resistance to the cut out rock.

The closest in technical essence to the present invention is an invert emulsion drilling fluid 2, containing, vol.%:

Water 60 -90

Oil product3 -35

Emultal 0,5-2,5

Oxidized

petrolatum2-5

Structural and mechanical properties of this solution, characterized by an indicator, and static shear stress, allow to keep a solid phase in it, in particular, solid matter (barite, hematite, etc.),

which is necessary both for drilling mud and for killing wells.

In this solution, sufficient values of static shear stress are achieved due to the increased content of the aqueous phase. However, experience with this solution has shown that, due to the increased water content, it has operational characteristics.

10 disadvantages, namely, low aggregate stability and high viscosity, which significantly limits the possibilities of its use in drilling and killing wells. In addition, the emultant included in the hydrophobic emulsion solution is characterized by a high cost of 1,300 rubles. for 1 t.

20

The purpose of the invention is to increase the aggregative stability and decrease the viscosity of the solution.

The goal is achieved by the fact that a hydrophobic-emulsion solution containing petroleum products, mineralized water and oxidized petrolatum, additionally contains hydrochloric acid salts from the production of high molecular weight amines with the following composition, wt.%:

30 Hydrocarbons 33.4 - 35.9 Primary. . amines 23.7-24.9 Secondary amines 39.2 - 42.9 and the ratio of ingredients is as follows, wt.%: Oil product 30 -80 Mineralized water 16 -69.7 Oxidized petrolatum0, 1-2 Salt salts from the production of the residue high molecular weight amines 0.2-2; petroleum, diesel fuel, bitumen distillate, etc. can be used as petroleum products. Mineralized water is aqueous solutions of calcium chloride or magnesium, hydroxyl acid. calcium, produced water, etc. Oxidized petrolatum (TU 38 UCL 201154 73) is the P15 mode of oxidation of a mixture of paraffins and ceresins and contains in its composition high molecular weight fatty acids (acid number 60-70 mg.conicum per 1 g of product) . The hydrochloric acid salts of amines are obtained by the action of hydrochloric acid on the bottoms from the production of high molecular weight amines C-i-io (TU 6-02-750 73). The bottom residue is a light brown solid that melts when it contains ,, wt.%: 33.4 - 35.9 Hydrocarbons Primary 23.7 - 24.9 Secondary 39.2 - 42 , 9 Sulfuric acid salts from the production of high molecular weight amines -20 are obtained by adding to them with stirring 40% by weight of hydrochloric acid amines of 25% concentration, the reaction temperature is 80–85 ° С, time is 15–20 min. Succinic salts of the bottom residue - a burgundy solid with a density of 0.96 gf / cm, flattened at 50-54 s, the surface tension of a 1% solution in kerosene at the boundary with distilled water of 6.7 erg / cm, dissolves into water and hydrocarbons, low toxicity. Hydrophobic emulsion solutions are prepared as follows. Oxidized petrolatum and hydrochloric acid salts of the bottom residue from the production of high molecular weight amines (SCR) are introduced into the oil product (oil from the Romashkinskoye field) with stirring. Then, saline water (for example, a solution of calcium chloride with a density of 1.18 g / cm) is gradually added and the solution is vigorously stirred to a constant value of the electrical test voltage (electrical stability) characterizing the aggregative stability of the solution. Under laboratory conditions, comparative standard tests of hydrophobic-emulsion solutions of various compositions were carried out to evaluate their aggregative stability and rheological properties. Aggregative stability was assessed by the electrical stability parameter (c) on an IGER-1 device, viscosity (s) on an VP-5 device, and static shear stress (mg / cm) on a CHC-2 device. The compositions of the solutions and the results of the tests are summarized in the table. As follows from these tables, the optimal concentration of hydrochloric acid salts of the bottoms amines in the solution is 0.2-2 wt.%. At a concentration of 0.1%, a sharp drop in electrical stability is observed; at a concentration exceeding 2%, there is no improvement in the basic parameters of the solution. The data also indicate significant advantages of the proposed solution compared with the known. The effectiveness of the proposed solution is expressed in the fact that if there are structural and mechanical properties (static static shear stress) desired to retain solid particles, the proposed solution has 1.752 times, 5 times higher electrical stability and 2-4.8 times lower values viscosity compared with the known. Oil product 46.0 Oxidized petrolatum 1.5 320 75 6.8 13 СКА0,2 Mineralized water

857210

Continued Nefteprodukt table 46 oxidized petrolatum 1, mineralized water Nefteprodukt46 Oxidized petrolatum1,5 SKA2 mineralized voda50,5 Nefteprodukt46 Oxidized petrolatum mineralized water 0.1 52.4 Nefteprodukt 46 oxidized petrolatum 1.5 2.1 SKA mineralized Water 50.4 NeLteproVO C ucts . 22.5 Oxidized petrolatum 5 Emultal 2.5 Mineralized water 70

Claims (2)

DETAILED DESCRIPTION OF THE INVENTION A hydrophobic-emulsion solution for drilling and plugging wells, containing petroleum products, oxidized petrolatum, and saline water, characterized in that, in order to increase the aggregative stability and decrease the viscosity of the solution, it additionally contains hydrochloric acid stills from the production of amino-molecular amines. having the following composition, wt.%: Hydrocarbon coal 33.4 - 35.9 Primary 23.7 - 24.9 amines Secondary amines J9.2 - 42.9 and the ratio of ingredients is as follows, wt ..%: Oil product 30 -80 Mineralization water 16 -69.7 Oxidized 0.1-2.0 petrolatum Sulfate salts from the production of high molecular weight amines 0.2-2.0 Sources of information taken into account during the examination 1. USSR author's certificate 234285, cl. From 09 to 7/04, 2. USSR author's certificate 570626, cl. From 09 K 7/02, 1973 (prototype).