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Water-in-oil drilling fluid and preparation method thereof

A water-in-oil type and drilling fluid technology, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor emulsion stability and high temperature resistance, and achieve good temperature and salt resistance, filtration loss Small amount, good emulsion stability

Active Publication Date: 2018-07-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is the problem of poor stability and high temperature resistance of the water-in-oil drilling fluid emulsion in the prior art, and a new water-in-oil drilling fluid is provided

Method used

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  • Water-in-oil drilling fluid and preparation method thereof
  • Water-in-oil drilling fluid and preparation method thereof
  • Water-in-oil drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (a) Preparation of Lauroyl Hydroxyethylethylenediamine (x=2, y=1, z=0)

[0046] Add 17 parts of N-hydroxyethylethylenediamine and 1.75 parts of KOH into a reactor equipped with a sealed mechanical stirrer, a thermometer, a condenser tube, and a receiving bottle. After stirring at 120°C for 1 hour, slowly add lauric acid dropwise 35 parts of methyl esters were added dropwise within 1 hour. React at 155°C for 6 hours, the methanol generated in the reaction is collected into the receiving bottle through the condenser tube, and then the remaining low-boiling point products and reaction raw materials are distilled off under reduced pressure to obtain 39.7 parts of the target product lauroyl hydroxyethylethylenediamine .

[0047] (b) Preparation of oil-based drilling fluid compound emulsifier

[0048] In parts by mass, 50 parts of lauroyl hydroxyethyl ethylenediamine obtained in step (a), 5 parts of polyoxyethylene polyoxypropylene ether zinc acetate (m=4, n=15) and 5 parts...

Embodiment 2

[0057] (a) Preparation of Lauroyl Hydroxyethylethylenediamine (x=2)

[0058] Add 17 parts of N-hydroxyethylethylenediamine and 0.35 parts of KOH into a reactor equipped with a sealed mechanical stirrer, a thermometer, a straight condenser tube, and a receiving bottle. After stirring at 150°C for 1 hour, slowly add 70 parts of methyl laurate were added dropwise within 1 hour. React at 180°C for 16 hours, the methanol generated in the reaction is collected into the receiving bottle through a straight condenser, and the remaining low-boiling products and reaction raw materials are distilled off under reduced pressure to obtain the target product fatty acyl hydroxyethyl ethylenediamine .

[0059] (b) Synthesis of N, N'-dilauroyl hydroxyethyl ethylenediamine polyoxyethylene ether (y=5, z=0)

[0060] Add 70 parts of N, N'-dilauroyl hydroxyethyl ethylenediamine synthesized in step (a), 3.5 parts of calcium oxide and calcium hydroxide mixture (the weight ratio of calcium oxide and c...

Embodiment 3

[0066] (a) Synthesis of N, N'-bisstearyl hydroxyethyl ethylenediamine (x=2)

[0067] Add 49 parts of N-hydroxyethylethylenediamine and 2.7 parts of KOH into a reactor equipped with a sealed mechanical stirrer, a thermometer, a straight condenser tube, and a receiving bottle. After stirring at 145°C for 1 hour, slowly add 270 parts of methyl stearate were added dropwise within 1 hour. React at 165°C for 12 hours, and the methanol generated in the reaction is collected into a receiving bottle through a straight condenser. The remaining low-boiling products and reaction raw materials were distilled off under reduced pressure to obtain the target product N,N'-bisstearyl hydroxyethyl ethylenediamine.

[0068] (b) Synthesis of N, N'-distearoyl hydroxyethyl ethylenediamine polyoxypropylene ether (y=1, z=10)

[0069] 203 grams of N, N'-distearoyl hydroxyethyl ethylenediamine and 185.4 parts of propylene oxide under the action of 7.6 parts of calcium oxide and calcium hydroxide mixture...

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Abstract

The invention relates to a water-in-oil type drilling fluid and a preparation method thereof, and is used for mainly solving the problems in the prior art that a water-in-oil type drilling fluid emulsion has poor stability and is not resistant to high temperature. The problems are relatively well solved through adopting the technical schemes that the water-in-oil type drilling fluid comprises the following components in parts by mass: (1) 60-90 parts of base oil; (2) 10-40 parts of water; (3) 2-5 parts of organic soil; (4) not less than 0.5 part of a composite emulsifier comprising a main emulsifier (I) and an auxiliary emulsifier (II); (5) 0-3 parts of an alkaline substance; (6) 0.5-3 parts of a tackifier; and (7) 0.5-3 parts of a filtrate loss reducer; and the oil-based drilling fluid and the preparation method thereof are provided. The water-in-oil type drilling fluid can be used for drilling operation of a stratum with strong water sensitivity and high temperature, a special well needing large drilling displacement, an offshore horizontal well and other occasions.

Description

technical field [0001] The invention relates to a water-in-oil drilling fluid and a preparation method thereof. Background technique [0002] With the continuous reduction of oil reserves and the difficulty of mining, countries all over the world have increased investment in the exploration and development of oil and gas resources in deep formations. The development of new oil reservoirs has become an urgent requirement for the development of major oil companies today. my country's unproven oil and gas resources are mainly distributed in the Tarim, Junggar, Qaidam, Turpan-Hami, and Sichuan basins. 73% of the resources are buried in deep layers, and the underground conditions are extremely complex. Therefore, oil and gas drilling and supporting facilities for deep and ultra-deep wells Advanced development technology has become a key factor restricting the development of oil and gas resources. As the formation depth increases, the formation temperature of deep wells and ultra-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/36C09K8/035
Inventor 高磊张卫东杨一青
Owner CHINA PETROLEUM & CHEM CORP
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