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Water-in-oil drilling fluid and preparation method thereof

A technology of water-in-oil drilling fluid and base oil, which is applied in chemical instruments and methods, drilling compositions, inorganic pigment treatment, etc., can solve the problems of poor stability of water-in-oil drilling fluid, etc., and achieve good system stability. , good dispersing performance, remarkable effect

Active Publication Date: 2016-09-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One of the technical problems to be solved by the present invention is the poor stability of water-in-oil drilling fluid 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

[0042] Synthesis of Amyl (R=5) Phenol Polyoxyethylene Ether (n=2) Sodium Carboxylate Betaine Modified Organic Soil

[0043] (1) Disperse 50 g of commercially available sodium bentonite into 600 g of water, and after high-speed stirring, remove impurities by suspension method to form a stable suspension system a;

[0044] (2) Mix 25g of amyl (R=5) phenol polyoxyethylene ether (n=2) sodium carboxylate betaine (40% by mass fraction) with 150g of water to form a homogeneous system b;

[0045] (3) Add b dropwise to a under high-speed stirring, and react at 30°C for 20 hours under normal pressure;

[0046] (4) Wash the product obtained in step (3) 5 times, then dry the product at 80°C, and pulverize it to obtain particles with a particle size below 78 μm, that is, amyl (R=5) phenol polyoxyethylene ether ( n=2) Sodium carboxylate betaine modified organic soil.

[0047] figure 1 Amyl (R=5) phenol polyoxyethylene ether (n=2) sodium carboxylate betaine modified organic soil and comme...

Embodiment 2

[0051] Steps (1) to (4) are the same as [Example 1], except that amyl (R=5) phenol polyoxyethylene ether (n=2) hydroxysulfonate sodium betaine is used to replace amyl (R=5) phenol Polyoxyethylene ether (n=2) sodium betaine carboxylate was used as modifier of organic soil.

[0052] figure 2 Amyl (R=5) phenol polyoxyethylene ether (n=2) hydroxysulfonate sodium betaine modified organic soil and commercially available sodium bentonite infrared absorption spectra, it can be seen that amyl (R=5) phenol The infrared absorption spectrum of organic soil modified by polyoxyethylene ether (n=2) sodium hydroxysulfonate betaine at 2935cm -1 and 2856cm -1 Presents an obvious C-H stretching vibration peak at 1464cm -1 The bending vibration peak of C-H appears at 1510cm -1 The stretching vibration peak of the benzene ring appears. It can be seen that the difference between the organic modified soil and the original soil in the infrared absorption spectrum is mainly due to the change of ...

Embodiment 3

[0055] Synthesis of Nonyl (R=9) Phenol Polyoxyethylene Ether (n=7) Sodium Carboxylate Betaine Modified Organic Soil

[0056] (1) Disperse 45g of commercially available sodium bentonite into 600g of water, and after high-speed stirring, remove impurities by suspension method to form a stable suspension system a;

[0057] (2) Mix 9 g of nonyl (R=9) phenol polyoxyethylene ether (n=7) sodium betaine carboxylate (50% by mass fraction) with 100 g of water to form a homogeneous system b;

[0058] (3) Add b dropwise to a under high-speed stirring, and react at 80°C for 4 hours under normal pressure;

[0059] (4) Wash the product obtained in step (3) for 3 times, then dry the product at 120°C, and pulverize it to obtain particles with a particle size below 78 μm, that is, nonyl (R=9) phenol polyoxyethylene ether (n =7) Sodium carboxylate type betaine modified organic soil.

[0060] image 3 It is the XRD spectrum of nonyl (R=9) phenol polyoxyethylene ether (n=7) sodium betaine carbo...

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Abstract

The invention relates to a water-in-oil drilling fluid and a preparation method thereof, and aims to solve the problem of bad stability of water-in-oil system formed by organic soil bought from the market in the prior art. The water-in-oil drilling fluid comprises basic oil, water, organic soil, emulsifier, a filtrate-loss reducer, and a pH value adjusting agent, well solves the problem mentioned above, and is capable of being applied to the special drilling operation in strong water sensitive and high temperature stratum.

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): C09K8/36C09K8/03C09C1/42C09C3/08C09C3/10
CPCC09C1/42C09C3/006C09C3/08C09C3/10C09K8/03C09K8/36
Inventor 沈之芹张卫东何秀娟吴国英
Owner CHINA PETROLEUM & CHEM CORP
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