SU1382843A1 - Hydrocarbon-base drilling fluid - Google Patents

Abstract

The invention relates to oil and gas and allows to increase sedimentation stability. drilling mud (P) while simultaneously improving its rheological parameters. Drilling R includes diesel fuel, oxidized petroletum, water-soluble iron salt, calcium hydroxide and chloride, chalk, barite, water, and the product of sodium alkyl benzene sulfonate (PVAN) with the number of hydrocarbon atoms from 16 to 28 and iron chloride (LC). The ratio of ingredients P is as follows, wt.%: Oxidized petrolatum 1.0 2.0; chalk 6, 5; water-soluble iron salt 1.1-1.8; calcium hydroxide 1.0-2.0; barite 53-59; PVAN with the number of hydrocarbon atoms from 16 to 28 and W 0.02-0.06; calcium chloride 4.6-7.2; water 9.0-11.2; diesel fuel else. Said PVAN is a product resulting from a decrease in aqueous P sulfonol NP-3 and ChG. The product is introduced into P as P in an organic solvent at a concentration of 30-50% by mass (RGPTF-1). After the preparation of RGPTF-1, the emulsion and the introduction of barite pulp into the emulsion P is ready for use. 2 tab. with (L with with SH) to 00 4 00

Description

The invention relates to oil | and gas production, in particular, to hydrocarbon-based drilling fluids used for flushing wells in complex geological conditions.

The aim of the invention is to increase the sedimentation stability of a hydrocarbon-based 10 mud solution while improving. its rheological parameters.

Hydrocarbon-based drilling fluid containing diesel fuel, oxidized petrolatum, burnt lime, calcium chloride, iron salt, barite and water are additionally injected with chalk and a reagent that is the product of the interaction of sodium alkyl benzenesulfonate with carbon 20 native atoms from 16 to 28 and ferric chloride, in the following ratio of ingredients, wt.%:

Oxidized petro

latum1 2 25

Water soluble

iron salt ,, 8

Calcium chloride 4,, 2

Water9.0 P, 2

Barit53 59 30

Mel6.0-9.5

Product interaction

VIA alkyl benzene

sodium background with numbers

carbon atom scrapj

 and chloride jelly

for 0, 06

Diesel, Fuel Else

The product of the interaction of alkyl benzene sulphonate with the number of carbon atoms of 40 to 16 to 28 and ferric chloride is a product formed by reducing aqueous solutions of sulphonol and ferric chloride. It is introduced into the drilling fluid in the form of a d solution in an organic solvent concentration (RGPTF 1).

In tab. 1 shows the compositions of the proposed drilling fluids; Table 2 shows their technological parameters.

one

Preparation of RGPTZ 1. In 7 ml of O, N of the sulfonol solution with stirring on a laboratory mixer, 3 ml of a 0.1 M solution of ferric chloride are injected. The precipitate obtained is washed on a filter, dried 0.2 g of the precipitate is dissolved in 0.2 g of xylene, 0.4 g of the RTGF reagent is obtained.

Emulsion preparation. With stirring, 202.3 g of diesel fuel injected 2 g of oxidized petrolatum, 125 g of chalk, 60 ml of ferric chloride solution, 200 ml of calcium chloride, 14.5 g of oxidized petrolatum, and 20 g of quicklime. Stir for 2 hours.

Preparation of barite pulp. In 124.8 g of diesel fuel, 0.4 g of previously prepared RGPTF reagent and 1200 g of b.arite are introduced. Stir 30 min.

After introducing barite pulp into the prepared emulsion, the solutions are ready for use.

The composition of the drilling fluid, wt.%: Diesel 15.98 Oxidized petrolatum 1.50 Mel6,10

Ferric Chloride 1.10 Calcium Chloride 4.6 Fast Lime 1.0 Water 11.20

Barit58,5

RGPTF 10.02

From Tables 1 and 2 it can be seen that an increase in the concentration of RGPTS leads to hydrophobic flocculation of barite (state 2), a decrease in the concentration of RP1TF leads to a loss of sedimentation stability of the solution and insufficient hydrophobization of the barite surface (composition 4) an increase in statistical stress, viscosity (composition 5), and a decrease in the chalk concentration leads to a decrease in the aggregative stability of the solution (composition 6).

Claims (1)

Invention Formula Hydrocarbon-based drilling fluid, including diesel fuel, oxidized petrolatum, water-soluble iron salt, calcium hydroxide, calcium chloride, chalk, barite, and water, so as to improve the sedimentation stability of the drilling fluid while improving its rheological parameters, it additionally contains the product of the interaction of sodium alkyl benzene sulfonate with the number of carbon atoms from 16 to 28 and ferric chloride with the following ratio of ingredients, wt%: Oxidized petrolatum 1,, 0 Mel6,, 5 Water soluble salt gland Calcium hydroxide Barite Interaction product alkyl benzene sulfonate sodium with the number of coal native atoms from 16 up to 28 and ferric chloride, 06 Calcium chloride 4,, 2 Water9.0-11.2 Diesel TollEmortal T a b l itz i CM l tf s h y T) H d with 01 t and and cfl f-i n) -in d CJ p) m o from l h about e Us S R. H E-1 S rt f. t5 О С p - l CO O) but sh to t-l o