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Aluminum-based plugging treatment agent for drilling fluid and preparation method thereof

A drilling fluid and treatment agent technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of low compatibility and affect the rheological properties of drilling fluids, achieve easy industrialization, enhance wellbore stability, The effect of easy control of reaction temperature

Active Publication Date: 2021-03-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technology requires a pulverization process. It is a solid treatment agent, which is not compatible with the drilling fluid system and will affect the rheology of the drilling fluid during use.

Method used

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  • Aluminum-based plugging treatment agent for drilling fluid and preparation method thereof
  • Aluminum-based plugging treatment agent for drilling fluid and preparation method thereof
  • Aluminum-based plugging treatment agent for drilling fluid and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] In a 250mL three-necked bottle, add 50g AlCl 3 ·6H 2 0. 50mL of water, temperature controlled to 40°C, 5% NaOH solution was added dropwise through the dropping funnel for neutralization reaction until the pH was 7, after full reaction for 1h, the temperature was raised to 80°C, and 0.8g of stearic acid and 0.2 g sodium dodecylbenzene sulfonate, 0.25 g sodium carboxymethyl starch, react for 0.5 h, and cool down to room temperature to obtain 150 mL of aluminum-based plugging treatment agent for liquid drilling fluid.

Embodiment 2

[0024] In a 250mL three-necked bottle, add 50g Al 2 (SO 4 ) 3 18H 2 0. 50mL water, temperature control 80°C, neutralize by adding 40% NaOH solution dropwise through the dropping funnel to make the pH of the reaction solution 8, after fully reacting for 0.5h, continue to control the temperature at 10°C, add 5g magnesium stearate, 1g Sodium carboxymethyl cellulose, after reacting for 6 hours, 135mL of aluminum-based plugging treatment agent for liquid drilling fluid can be obtained.

Embodiment 3

[0026] In a 250mL three-necked bottle, add 50g KAl(SO 4 ) 2 12H 2 O, 50mL water, temperature control 10°C, dropwise add 30% KOH solution through the dropping funnel to neutralize to pH 7, after fully reacting for 24h, heat up to 50°C, add 0.25g sodium pyrophosphate, 0.1g xanthan gum in turn After reacting for 1 hour, 140 mL of aluminum-based plugging treatment agent for liquid drilling fluid can be obtained.

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Abstract

The invention relates to an aluminum base blocking treatment agent for drilling fluid and a preparation method thereof in the field of an oil gas field chemical auxiliary agent. The aluminum base blocking treatment agent for the drilling fluid is prepared from ingredients including inorganic aluminum, surface modifying agents and dispersing agents, wherein the mass ratio of the inorganic aluminumto the surface modifying agent is (10 to 500):1; the weight ratio of the organic aluminum to the dispersing agents is (50 to 500):1; the surface modifying agents are selected from at least one kind ofmaterials from stearic acid, sodium stearate, magnesium stearate, sodium dodecyl benzene sulfonate, sodium metaphosphate and sodium pyrophosphate; the dispersing agents are selected from at least onekind of materials from starch, sodium carboxymethyl starch, sodium carboxymethylcellulose, polyanionic cellulose and xanthan gum. The aluminum base blocking treatment agent for the drilling fluid isof a liquid type; the use is easy; the dust problem cannot occur; the difficult problem of obvious matching problem of the existing aluminum base treatment agent in a drilling well system can be effectively solved.

Description

technical field [0001] The invention relates to the field of chemical additives for oil and gas fields, and more particularly relates to an aluminum-based plugging treatment agent for drilling fluid and a preparation method thereof. Background technique [0002] As the formation conditions encountered become more and more complex, drilling operations have higher and higher requirements on the anti-slump performance of drilling fluid and the ability to strengthen the wellbore wall. The plugging and anti-collapse treatment agent can block the primary pores and micro-cracks of the formation, block the hydration channels, improve the plugging ability of the drilling fluid, reduce the free water in the drilling fluid from invading the formation, and reduce the collapse pressure of the formation to stabilize the well. The role of the wall. Plugging and anti-slump treatment agents mainly include asphalt treatment agents such as emulsified asphalt, sulfonated asphalt, and oxidized ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/46
CPCC09K8/426C09K8/46
Inventor 孔勇杨小华林永学王琳钱晓琳李胜杨帆张国
Owner CHINA PETROLEUM & CHEM CORP
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