SU1146307A1 - Hydrophobic emulsion drilling mud - Google Patents

Abstract

HYDROPHOBIC EMULSION DRILLING SOLUTION containing diesel fuel, saturated sodium chloride solution, bentonite clay, ut emulsifier and emulsifier, which in oils with concentrated aqueous solutions of sodium silicate and iron salts, taken p mass ratio, respectively 4.5-5.5: 1.8-2.2: 0.15-0.25 in the following ratio of components, wt.%: Diesel fuel 18.0-42.1 Saturated aqueous solution of sodium chloride 18.0-42.1 Bentonite clay. 5.4-12.0 The product of the interaction of foliar oil with concentrated aqueous solutions (L of sodium silicate and iron salt, taken in a mass ratio of 4.5-5.5: 1.8-2.2: 0, respectively; 15-0,25 2,4-6,0 The rest is UT 4 O5 Co

Description

one . The invention relates to the drilling of wells in unstable and chemogenic rocks, as well as the opening of productive formations with carbon-based solutions. A hydrophobic emulsion drilling fluid (HEBR) is known, which contains a hydrocarbon base (oil or diesel fuel), a builder (clay powder), an extract agent (barite), water, sulfoolein, and ferric chloride. The disadvantages of this solution are its low stability, low resistance to the drilled rock, relatively high cost and deficiency of emulsifiers used, which makes it difficult to use them widely. The closest to the invention is GEBR C2 1, containing, in wt%: Diesel fuel 18.0-41, Excelent aqueous solution of NaCl18.0-42, Bentonite clay 5.4-12, The product of the interaction of crude deciduous oil with a concentrated aqueous solution Sodium aluminate, taken in a mass ratio of 5: 2, 1.2-7.2%, is desirable 18.0-36. A disadvantage of the known solution is its relatively low resistance to the contaminating action of drill cuttings. The purpose of the invention is to increase the stability of the solution to the contaminating action of drill cuttings particles. The goal is achieved by the fact that in a hydrophobic emulsion drilling fluid containing diesel fuel, a saturated aqueous solution of sodium chloride, bentonite clay, and the emulsifier as emulsifier it contains the product of the interaction of crude deciduous oil with concentrated aqueous solutions of sodium silicate and iron salts, taken in a mass ratio of 4.5-5.5: 1.8-2.2: 0, 15-0.25, respectively, with the following Component wt.%: Diesel fuel 18.0-42, Saturated aqueous solution of sodium chloride 18.0-42, Bentonite clay 5.4-12, 7i The product of the interaction of crude deciduous oil with concentrated aqueous solutions of sodium silicate and iron salt, taken in the mass ratio, respectively, 4.5-5.5: 1.8-2.2:: 0.15-0.252.4-6.0% of the total quantity of crude deciduous oil (Spec. op 61-77), obtained during the processing of hardwood, mixtures of fatty (35-55%) and resin (30-55%) acids, as well as neutral substances (4-20%) are included. Fatty acidic acids are represented by oleic (28-43%), linoleic (38-65%), linolenic (0.5-2%), stearic (4-10%), palmitic (4-10%) and abietic (20 -55%) acids. P p i. measure 1. Getting the drilling fluid. In 300 g (30%) of diesel fuel, 29.2 g of deciduous oil is dissolved within 3 minutes, then concentrated aqueous solutions of sodium silicate and iron salts are introduced, the content of respectively 11.7 g and 1.1 g (total 4, 2%) of the main substance. The mixture is stirred for 3 minutes, after which 300 g (30%) of mineralized (30% NaCl) water and 87 g (8.7%) of bentonite clay are added. After the last two components have been introduced, the solution is stirred for 30 and 20 minutes, respectively. The solution is quenched with a dry standard utler in an amount of 271 g (27.1%). The remaining compositions of the hydrophobic emulsion drilling fluid, according to the indicated limits, are prepared analogously to Example 1. The resulting solutions are tested according to conventional methods. The resistance of the EBRB to drill cuttings is studied according to the method consisting in that 20% of bentonite clay is added to the drilling fluid, heated to 115 ° C with drainage for 24 hours, after which its technological properties are analyzed. The results of the n {) implemented tests are presented in the table. As can be seen from the table, the use of the proposed emulsifier makes it possible to increase the resistance of the emulsion drilling mud to drill cuttings. The obtained positive effect is achieved by the fact that a three-dimensional hydrophilic-lipophilic structured polymer film is formed at the interface of the interface due to the interaction of the molecules of the organic compounds with the inorganic polymer, which prevents the coalescence of the dispersed phase droplets with the solid filler, as well as the hydrophobic agent, and the pyx-ja – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – j – jh-chj – j – j – j – j – j – j – j – jh-ch-chemically synthesized, polymeric polymeric film to the interfacial interface is formed. An increase in the amount of Bbmie emulsifier of 6.0% leads to thickening of the emulsion, and its content below 2.4% is not enough to obtain a solution with good technological properties. Non-observance of the limits of the ratio of the components of the emulsifier leads to a sharp deterioration in the technological properties of the EBRD.

Diesel 30.0 30% solution of NaCl30.0

Emulsifier (5: 2: 0.2 ratio) 4.2 Clay8.7

Ut zhelitel 27.1

. The composition of example 1 + 20% clay

.Diesel 30% aqueous solution of NaCl Emulsifier (ratio 5: 2: 0.2)

Clay Uth the Wishlist

. The composition of example 3 + 20% clay

.Diesel 30% aqueous solution of NaCl

2.1 Emulsifier (5: 2: 0.2 ratio)

6.0 12.0 Clay 21.9 Ut

. The composition of example 5 + 20% clay

.Diesel fuel

42.1 18 30% aqueous solution of NaCl

", 1 Emulsifier (1p (5: 2: 0.2 ratio)

4.8 Clay 11.0

33/68

220

0.012

Oh oh

220

0.029 250 0.001

Prod / stsenie table

Famous

45

Diesel fuel 30 Saturated aqueous solution of NaCl 30 Emulsifier 4.2 Clay8.7

Ut zhelitel 27.1

Composition according to example 69 1 7 + 20% clay

0,010

220

73/102

0.035

190

80/101

Claims (3)

HYDROPHOBIC EMULSION DRILLING SOLUTION containing diesel fuel, saturated sodium chloride solution, bentonite clay, weighting agent and emulsifier, characterized in that, in order to increase the stability of the solution to the polluting action of drill cuttings, it contains the product of the interaction of crude deciduous oil with concentrate aqueous solutions of sodium silicate and iron salts, taken in the mass ratio, respectively 4.5-5.5: 1.8-2.2: 0.15-0.25 with the following ratio of components, May 2: Diesel fuel 18.0-42.1 Saturated aqueous solution of sodium chloride Bentonite clay Raw interaction product 18.0-42.1 5.4-12.0 deciduous oil with concentrated aqueous solutions of sodium silicate and iron salts, taken in the mass ratio, respectively 4.5-5.5: 1.8-2.2: : 0.15-0.25 2.4-6.0 Weighting Rest SU,. „1146307