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High-temperature resistance tackifier for drilling fluid and preparation method thereof

A viscosifying agent and high temperature resistance technology, applied in the field of petroleum drilling fluid, to achieve the effect of maintaining and protecting oil and gas layers, reducing bentonite content and maintaining stability

Active Publication Date: 2011-07-20
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After studying the existing treatment agents in the oil field, it was found that the existing treatment agents had certain technical shortcomings in terms of high temperature viscosity increase

Method used

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  • High-temperature resistance tackifier for drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Add 100g of starch, 50g of guar gum, 10ml of propylene oxide and 600ml of water into a three-neck flask, stir for 10 minutes, then add a sodium hydroxide solution made of 10g of sodium hydroxide and 30ml of water, and heat in a water bath at 10°C React at ~70°C for 2 hours, then discharge, then dry and pulverize to obtain the finished product.

Embodiment 2

[0012] Add 100g of starch, 40g of guar gum, 20ml of epichlorohydrin, 10ml of ethanol and 500ml of water into the three-necked bottle, stir for 20 minutes, then add the potassium hydroxide solution made of 18g of potassium hydroxide and 60ml of water, and put it in a water bath Heating the pot and reacting at 65°C to 120°C for 3 hours, then discharging, drying and crushing at 100°C to obtain the finished product.

[0013] The temperature-resistant viscosity-increasing performance of the high-temperature-resistant tackifier prepared in embodiment 1 and embodiment 2 in fresh water, seawater, brine is shown in the following table:

[0014]

[0015] The high temperature resistant tackifier prepared in Example 1 and Example 2 has a temperature resistance of 150°C in fresh water, a temperature resistance of 130°C in seawater, and a temperature resistance of 120°C in brine.

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Abstract

The invention relates to a petroleum drilling fluid, in particular to a high-temperature resistance tackifier for a drilling fluid and a preparation method thereof. The high-temperature resistance tackifier for the drilling fluid comprises the following components in parts by mass: 1 part of starch, 0.05-5 parts of guar gum, 0.01-2 parts of alkaline hydroxides, 0.02-6 parts of epoxide and 0-9 parts of alcohol solvent. The preparation method of the high-temperature resistance tackifier for the drilling fluid comprises the following steps of: adding the starch and the guar gum to a vessel, thenadding the epoxide and the alcohol solvent and stirring for 10-30min, then adding a water solution of alkaline hydroxides, continuously stirring and reacting for 20min-3h at 0-120 DEG C, discharging,drying and crushing to obtain a finished product. The tackifier prepared by adopting the preparation method disclosed by the invention achieves the purpose of improving the temperature resistance of a solid-free drilling fluid for a deep well and the viscosity and the shearing force of the drilling fluid.

Description

Technical field: [0001] The invention relates to a petroleum drilling fluid, in particular to a high temperature resistant viscosifier for drilling fluid and a preparation method thereof. Background technique: [0002] At present, with the development of drilling technology, the number of deep wells, ultra-deep wells and special process wells is increasing year by year, coupled with the continuous deepening of my country's development of offshore oil resources, this requires some drilling fluid treatment agents with excellent high temperature resistance and salt resistance , to meet the needs of on-site construction. After researching the existing treatment agents in the oil field, it is found that the existing treatment agents have certain technical shortcomings in terms of high temperature viscosity increase. For example: when the temperature exceeds 120°C, the commonly used viscosifier CMC, biopolymer, polyanionic cellulose, etc. in the oil field will obviously decrease i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/035
Inventor 尹志亮李燕
Owner BC P INC CHINA NAT PETROLEUM CORP
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