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High-temperature-resistant high-density biomass synthetic base drilling fluid and preparation method thereof

A biomass and high-temperature resistant technology, applied in the field of drilling fluids, can solve the problems of difficult biodegradation and low environmental acceptability of synthetic-based drilling fluids, maintain suspension stability, improve sand-carrying capacity, and improve high-temperature rheology. performance effect

Active Publication Date: 2019-03-26
CHINA PETROCHEMICAL CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The application number is 201110292911.2, and the Chinese patent literature published on April 25, 2012 discloses a high-temperature-resistant high-density synthetic base drilling fluid. The base fluid used is limonene, dipentene, ethylene glycol monobutyl ether, alkanes glucoside, alcohol ether carboxylate, white oil and simethicone oil mixture, although the synthetic base drilling fluid disclosed above meets the drilling requirements of different complex wells in terms of performance, but in terms of environmental acceptability, due to the use of The base fluids are all alkane compounds, which are difficult to biodegrade. The drill cuttings produced after subsequent use are listed in the "National Hazardous Waste List" (hazardous waste list number is HW-08) because they contain hydrocarbon / water mixtures. This shows that traditional The environmental acceptability of the synthetic base drilling fluid is low

Method used

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  • High-temperature-resistant high-density biomass synthetic base drilling fluid and preparation method thereof
  • High-temperature-resistant high-density biomass synthetic base drilling fluid and preparation method thereof
  • High-temperature-resistant high-density biomass synthetic base drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] Add 6 mol of cetyl alcohol, 0.5 mol of n-pentane chloride, 0.5 mol of sodium hydroxide, and 0.02 mol of 1-butyl-3-methylimidazolium hexafluorophosphate catalyst into a reaction kettle with a stirring, condensing and heating device, Stir and mix evenly, and react at 90° C. and 300 rpm for 24 hours to obtain cetyl alcohol pentyl ether.

[0094] Carry out infrared spectrum detection to cetyl alcohol pentyl ether prepared in the embodiment of the present invention 1, detection result is as follows figure 1 shown by figure 1 It can be seen that the structural formula of the cetyl pentyl ether prepared in Example 1 of the present invention is:

[0095] CH 3 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -O-CH 2 -CH 2 -CH 2 -CH 2 -CH 3

Embodiment 2

[0097] Add 6 mol of cetyl alcohol, 1.5 mol of n-chlorohexane, 1.5 mol of potassium hydroxide, and 0.2 mol of 1-octyl-3-methylimidazolium hexafluorophosphate catalyst into a reaction kettle with a stirring, condensing and heating device, and stir Mix well, and react at 150° C. and 500 rpm for 18 hours to obtain cetyl alcohol hexyl ether.

[0098] According to the method of Example 1, the cetyl alcohol hexyl ether prepared in the embodiment 2 of the present invention is detected, and the test result is that the structural formula of the cetyl alcohol hexyl ether prepared in the embodiment 2 of the present invention is:

[0099] CH 3 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -O-CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 3

Embodiment 3

[0101] Add 6 mol of stearyl alcohol, 1 mol of n-pentane chloride, 1.2 mol of sodium hydroxide, and 0.1 mol of polyethylene glycol-600 catalyst into a reaction kettle equipped with a stirring, condensing and heating device, stir and mix evenly. The reaction was carried out at 400 rpm for 24 hours to obtain stearyl pentyl ether.

[0102] According to the method of Example 1, the octadecyl alcohol pentyl ether prepared in the embodiment 3 of the present invention is detected, and the detection result is that the structural formula of the stearyl alcohol pentyl ether prepared in the embodiment 3 of the present invention is:

[0103] CH 3 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -CH 2 -O-CH 2 -CH 2 -CH 2 -CH 2 -CH 3

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Abstract

The invention provides high-temperature-resistant high-density biomass synthetic base drilling fluid and belongs to the technical field of petroleum and gas environmental-friendly synthetic base drilling fluid. The high-temperature-resistant high-density biomass synthetic base drilling fluid provided by the invention comprises a biomass alcohol ether base solution, a CaCl2 aqueous solution, organic soil, a high-temperature-resistant emulsifier, a lubricating agent, an extraction agent, a filtrate reducer, CaO and barite, wherein the biomass alcohol ether has a structure of a formula I; the high-temperature-resistant emulsifier has a structure of a formula II; and the extraction agent has a structure of a formula III. With the adoption of the biomass alcohol ether, the high-temperature-resistant emulsifier and the extraction agent, under the comprehensive effects of the various components in the drilling fluid, the high-temperature-resistant high-density biomass synthetic base drillingfluid provided by the invention is prepared from green and environmental-friendly raw materials and has excellent biodegradability and viscosity-temperature characteristics.

Description

technical field [0001] The invention relates to the technical field of drilling fluid, in particular to a high-temperature-resistant high-density biomass synthesis-based drilling fluid and a preparation method thereof. Background technique [0002] With the increasing number of deep wells, ultra-deep wells, horizontal wells, and highly deviated directional wells, the probability of drilling into highly water-sensitive formations is getting higher and higher. Synthetic-based drilling fluids are obtained due to their excellent lubrication and inhibition properties. widely used. However, the base fluids currently used to prepare high-temperature and high-density synthetic-based drilling fluids are mainly chemical products such as mineral oil, linear α-olefins, and linear paraffins, which have certain environmental toxicity and poor biodegradability. Regional applications have been restricted. In addition, deep wells and ultra-deep wells have high formation pressure coefficien...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/24
CPCC09K8/24
Inventor 刘明华单海霞郭金爱黄桂春孙举王中华
Owner CHINA PETROCHEMICAL CORP
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