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Environmentally-friendly low-fluorescence plugging agent used for drilling fluids, and preparation method thereof

A plugging agent and an environmentally friendly technology, which is applied in the field of environmentally friendly fluorescent plugging agents for drilling fluids and its preparation, can solve the problems of unsatisfactory anti-slump drilling fluids, increased viscosity of drilling fluids, and high fluorescence levels, and achieve excellent sealing Blocking and anti-collapse performance, environmental protection, good compatibility

Active Publication Date: 2017-03-29
TIANJIN TIANCHENG TUOYUAN TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Although asphalt, paraffin, and polymeric alcohol plugging agents have been developed in the existing drilling fluid technology, they have good plugging effects under certain conditions, but the asphalt has a high fluorescence level and is limited to production wells in areas with low environmental protection requirements Practical, but paraffins and polyalcohols are prone to air bubbles and cause a significant increase in drilling fluid viscosity, which cannot meet the needs of anti-slump drilling fluids

Method used

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  • Environmentally-friendly low-fluorescence plugging agent used for drilling fluids, and preparation method thereof
  • Environmentally-friendly low-fluorescence plugging agent used for drilling fluids, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The environment-friendly low-fluorescence plugging agent for drilling fluid is prepared according to the following method:

[0018] Add 40 parts of C1618 fatty alcohol into the reaction kettle, then start stirring when heated to 65°C (rotation speed is 55r / min), then slowly add 42 parts of stearic acid and 1 part of p-toluenesulfonic acid in sequence, and then heat up to 155°C, React at constant temperature for 4 hours; then lower the temperature. When the temperature drops to 75°C, add 1 part of alkylphenol polyoxyethylene ether and 5 parts of PEG-600, stir for 30 minutes, and then slowly add light CaCO 3 15 parts, 12 parts of cotton fiber, stirred and reacted at a constant temperature of 75°C for 1 hour, then discharged, cooled to room temperature, crushed to a 20-mesh sieve with a passing rate of 95%, and the final product was obtained.

Embodiment 2

[0019] Embodiment 2: the product performance test of embodiment 1 gained

[0020] 1. Using conventional testing methods in this field, different amounts of the product of Example 1 were added to 4wt% bentonite slurry to study its performance after aging at 80°C for 16 hours. The results are shown in Table 1. The results show that with the increase of the concentration of the product, the viscosity and shear force of the drilling fluid change little, and the pH value remains basically unchanged, indicating that the product has little effect on the rheological properties and pH value of the drilling fluid.

[0021] Table 1. Effect of products on rheological properties of drilling fluid (80°C, 16h)

[0022]

[0023] 2. Using conventional test methods in this field, the product of Example 1 and the common asphalt plugging agent on the market were studied under the same conditions, and the change of its high-temperature and high-pressure filtration loss over time, the results ar...

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Abstract

The invention belongs to the field of additives for drilling fluids, and concretely discloses an environmentally-friendly low-fluorescence plugging agent used for drilling fluids, and a preparation method thereof. The plugging agent is prepared from, by weight, 35-45 parts of C1618 fatty alcohol, 40-45 parts of stearic acid, 2-6 parts of polyethylene glycol, 0.5-1.5 parts of p-toluenesulfonic acid, 0.5-1.5 parts of alkylphenol polyoxyethylene, 10-16 parts of lightweight CaCO3 and 10-15 parts of cotton fibers. The plugging agent has the advantages of low fluorescence grade, biodegradability, facilitation of environmental protection, and integration of the excellent plugging and anti-sloughing performances and the oil reservoir protection effect of an asphalt product.

Description

technical field [0001] The invention belongs to the field of additives for drilling fluids, in particular to an environment-friendly fluorescent plugging agent for drilling fluids and a preparation method thereof. Background technique [0002] Although asphalt, paraffin, and polymeric alcohol plugging agents have been developed in the existing drilling fluid technology, they have good plugging effects under certain conditions, but the asphalt has a high fluorescence level and is limited to production wells in areas with low environmental protection requirements Practical, but paraffins and polyalcohols are prone to bubbles and cause a significant increase in the viscosity of drilling fluids, which cannot meet the needs of anti-slump drilling fluids. Therefore, it is urgent to develop a new type of plugging agent for drilling fluid, which has low fluorescence intensity, good plugging performance at high temperature, no viscosity increase and no thickening, and can be used in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/44C09K8/467C09K8/03
CPCC09K8/03C09K8/5086
Inventor 杨静冯海平刘学明王义虎全晓虎冯奇刘传海李昂
Owner TIANJIN TIANCHENG TUOYUAN TECH DEV
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