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Water-based drilling fluid composition containing amine compound

A technology of water-based drilling fluids and amine compounds, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of increased fluid loss, reduced efficacy of other treatment agents, and large amount of addition, and achieves good results. control, excellent suppression performance, and broad application prospects

Inactive Publication Date: 2010-10-20
CNPC DRILLING RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing inhibitors such as potassium chloride, potassium sulfate, potassium formate, sodium formate, ammonium chloride, sulfonated asphalt, quaternary ammonium salt compounds, etc. must be added in large quantities to achieve satisfactory inhibitory performance, or they will Reduce the efficacy of other treatment agents, thereby affecting other properties of the drilling fluid, such as increased fluid loss, loss of thixotropy, etc.

Method used

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  • Water-based drilling fluid composition containing amine compound
  • Water-based drilling fluid composition containing amine compound
  • Water-based drilling fluid composition containing amine compound

Examples

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preparation example

[0074] Preparation example: Synthesis of amine compound as a new shale inhibitor

[0075] Raw material: bis(2-aminopropyl) ether, chemically pure, Sinopharm Chemical Reagent Co., Ltd.;

[0076] Ethylene oxide, chemically pure, Sinopharm Chemical Reagent Co., Ltd.;

[0077] Propylene oxide, chemically pure, Sinopharm Chemical Reagent Co., Ltd.

preparation example 1

[0079] In a small high-temperature and high-pressure reactor (volume 100 mL) equipped with a pressure gauge, agitator and temperature sensor, put 30 g of bis(2-aminopropyl) ether sample into it, raise the temperature to 80-85°C, and stir well. Under the conditions, first add about 4.0g of ethylene oxide, and after the reaction starts, add 16.0g of ethylene oxide (the amount of ethylene oxide added is 20g), the temperature rises to 110℃, and the pressure in the reactor drops After that, the temperature was raised to 125°C and the reaction was maintained for 2 hours to obtain a pale yellow viscous liquid, which was directly used as an amine compound shale inhibitor. After gas / mass spectrometry analysis and characterization by GC / MS, the light yellow viscous liquid contains the molecular formula HO-C 2 H 4 -NH-CH(CH 3 )-CH 2 -O-CH 2 -CH(CH 3 )-NH-C 2 H 4 The content of -OH is 91.4%.

preparation example 2

[0081] In a small high-temperature and high-pressure reactor (volume 100 mL) equipped with a pressure gauge, agitator and temperature sensor, put 30 g of bis(2-aminopropyl) ether sample into it, raise the temperature to 80-85°C, and stir well. Under the conditions, first add about 5g of propylene oxide, and after the reaction starts, add 21.4g of propylene oxide (the total amount of propylene oxide added is 26.4g), the temperature rises to 110°C, the pressure in the reactor drops, and the temperature rises The reaction is maintained at 125°C for 2 hours to obtain a pale yellow viscous liquid, which is directly used as an amine compound shale inhibitor. After GC / MS analysis and characterization by gas / mass spectrometry, the molecular formula HO-CH(CH 3 )CH 2 -NH-CH(CH 3 )-CH 2 -O-CH 2 -CH(CH 3 )-NH-CH 2 CH(CH 3 ) The content of -OH is 87.9%.

[0082] Preparation of water-based drilling fluid composition containing amine compound

[0083] raw material:

[0084] The amine compound pr...

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Abstract

The invention provides a water-based drilling fluid composition containing an amine compound, which comprises the following components: a 0.5 to 5 weight percent of water-based amine compound as shown in formula I: RHN-Y-[OY']X-NHR', wherein Y, Y',x, R and R' are as defined in a manual; 0.1 to 1.0 weight percent of water-based tackifier which is selected from one or more types of xanthan gum, acrylamide-acrylic copolymer and hydroxyl ethyl cellulose; 0.5 to 5 weight percent of water-based fluid loss agent which is selected from one or more types of modified lignite, acrylic polymer, modified starch and modified cellulose; 2 to 12 weight percent of water-based inhibitor which is selected from one or more types of potassium chloride, potassium sulfate, formic acid, formic acid sodium, potassium chloride and epoxypropyltrimethylammonium chloride; and the composition can also further comprises coating agent, weighting agent, lubricant, borehole stabilizer and the like. The water-based drilling fluid composition has good inhibiting performance to clay shale drilling cuttings.

Description

Technical field [0001] The invention relates to a water-based drilling fluid composition, in particular to a water-based drilling fluid composition containing an amine compound. Background technique [0002] Oil and gas drilling is inseparable from drilling fluids. The drilling fluid circulates through the wellbore, carries the cuttings generated by the drill bit, and transports the cuttings into the annulus. At the same time, the drilling fluid can cool and clean the drill bit, reducing the friction between the drill string and the well wall. A well-performing drilling fluid can form a thin and low permeability filter cake to stabilize the drilled formation and prevent the liquid phase from invading the formation. According to the fluid medium contained, drilling fluids can be divided into water-based drilling fluids, oil-based drilling fluids and gas drilling fluids, among which water-based drilling fluids have always occupied a dominant position in practical applications. [0...

Claims

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Application Information

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IPC IPC(8): C09K8/10C09K8/12
Inventor 屈沅治邹来方应江华赖晓晴王奎才孙金声
Owner CNPC DRILLING RES INST
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