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Low-foaming and low-fluorescence lubricant for drilling fluid and preparation method thereof

A low-fluorescence, drilling fluid technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems affecting the oil and gas layers of mud logging workers, affecting the performance of well mud, drilling fluid viscosity, shear force increase, etc. , to achieve the effect of no adverse effect on well mud performance, low fluorescence level and low foaming performance

Active Publication Date: 2017-12-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The general lubricants currently used, due to their fluorescence, have a great impact on geological mud logging during use in exploration wells and some key wells, seriously affecting mud logging workers to discover new oil and gas layers in mud logging; The agent has foaming properties, which affects the performance of the well mud, increases the viscosity and shear force of the drilling fluid, and is not conducive to the maintenance and treatment of the drilling fluid on site

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Add 25 parts of 150SN and 60 parts of glycerin fatty acid ester into the reaction kettle, raise the temperature to 50°C, stir at high speed for 0.5h, slowly add 10 parts of Span-80, stir at high speed for 0.5h, raise the temperature to 70°C, slowly add 5 parts The antifoaming agent silicone continued to stir for 0.5h, and cooled to obtain a low-foaming and low-fluorescence lubricant for drilling fluid 1 # .

Embodiment 2

[0022] Add 30 parts of 150SN and 56 parts of propylene glycol monooleate into the reaction kettle, raise the temperature to 80°C, stir at high speed for 0.5h, slowly add 8 parts of Tween-80, stir at high speed for 0.5h, raise the temperature to 100°C, slowly add 6 part of antifoaming agent modified silicone and continue to stir for 0.5h, and cool down to obtain low-foaming and low-fluorescence lubricant for drilling fluid 2 # .

Embodiment 3

[0024] Add 30 parts of 60SN and 56 parts of propylene glycol monooleate into the reaction kettle, raise the temperature to 70°C, stir at high speed for 0.5h, slowly add 8 parts of MOA-4, stir at high speed for 0.5h, raise the temperature to 90°C, slowly add 6 part of antifoaming agent glycerol polyether and continue to stir for 0.5h, then cool to obtain low-foaming and low-fluorescence lubricant for drilling fluid 3 # .

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PUM

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Abstract

The invention discloses a low-foam low-fluorescence lubricant for a drilling fluid and a preparation method thereof, and relates to the technical field of a lubricant for a water-based drilling fluid. The lubricant is characterized by comprising the following ingredients, by weight, 20-40% of base oil, 40-60% of fatty acid ester, 5-10% of a surfactant and 3-10% of an antifoaming agent. the preparation method of the lubricant comprises the following steps: respectively adding the above base oil and fatty acid ester according to the above ratio into a reaction still, warming to 50-80 DEG C, stirring at high speed for 0.5h, slowly adding the surfactant, stirring at high speed for 0.5h, warming to 70-100 DEG C, adding the antifoaming agent and continuously stirring for 0.5h, and cooling to obtain the low-foam low-fluorescence lubricant for the drilling fluid. As the lubricant has low fluorescence level, the lubricant has no negative effects on geological logging, the condition that real rock debris cannot be dredged out on logging will not happen, and discovery of new hydrocarbon reservoir also will not be influenced. In addition, the lubricant has poor foaming property such that the lubricant has no adverse effects on properties of well mud.

Description

technical field [0001] The invention relates to a lubricant for drilling fluid and a preparation method thereof, in particular to a low-foaming and low-fluorescence lubricant for drilling fluid and a preparation method thereof. Background technique [0002] With the increasing number of horizontal wells, directional wells and highly deviated wells, in the oil drilling process, it is often necessary to use a large amount of drilling fluid lubricants to reduce the friction between the well wall and the drilling tool, and between the drilling tool and the casing , reduce downhole complex situations, and increase drilling speed. The general lubricants currently used, due to their fluorescence, have a great impact on geological mud logging during use in exploration wells and some key wells, seriously affecting mud logging workers to discover new oil and gas layers in mud logging; The agent has foaming properties, which affects the performance of the well mud, increases the visco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035
CPCC09K8/035C09K2208/34
Inventor 逯贵广封心领袁俊秀徐冬梅
Owner CHINA PETROLEUM & CHEM CORP
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