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Filtrate reducer for drilling fluid and preparation method of filtrate reducer

A fluid loss control agent and drilling fluid technology, applied in drilling compositions, chemical instruments and methods, etc., can solve problems such as impact and formation damage, and achieve the effects of cost reduction, fluid loss reduction, and easy implementation.

Inactive Publication Date: 2015-03-25
JIANGSU JIANSHEN BIOLOGY AGROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the formation of the filter cake wall, too much water is lost by filtration, the filter cake is too thick, and fine clay particles enter the formation with water, which will affect normal drilling and cause damage to the formation.

Method used

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  • Filtrate reducer for drilling fluid and preparation method of filtrate reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A fluid loss control agent used in drilling fluids, including the following raw materials in parts by weight:

[0021] 8 parts of natural asphalt, 5 parts of methylene bisacrylamide, 3 parts of maleic anhydride, 6 parts of isooctyl methacrylate, 0.02 parts of sodium bisulfite, 3 parts of sodium humate, 5 parts of xanthan gum, 4 parts of polyacrylic acid Parts, 0.5 part of chlorobutanol, 0.1 part of edetate disodium, 1 part of triethanolamine, 10 parts of pentaerythritol, 50 parts of ethyl acetate.

[0022] The preparation method of the fluid loss control agent used in the drilling fluid in this embodiment includes the following steps:

[0023] Step (1), add methylene bisacrylamide, maleic anhydride and isooctyl methacrylate together into ethyl acetate, raise the temperature to 65°C, then add sodium bisulfite, and stir and react for 1 hour under a nitrogen atmosphere;

[0024] Step (2), add pentaerythritol to the reaction solution of step (1), keep the temperature, stir for 10 m...

Embodiment 2

[0026] A fluid loss control agent used in drilling fluids, including the following raw materials in parts by weight:

[0027] 20 parts of natural asphalt, 8 parts of methylene bisacrylamide, 5 parts of maleic anhydride, 10 parts of isooctyl methacrylate, 0.06 parts of sodium bisulfite, 5 parts of sodium humate, 8 parts of xanthan gum, 6 parts of polyacrylic acid Parts, 1 part of chlorobutanol, 0.3 parts of edetate disodium, 5 parts of triethanolamine, 15 parts of pentaerythritol, and 80 parts of ethyl acetate.

[0028] The preparation method of the fluid loss control agent used in the drilling fluid in this embodiment includes the following steps:

[0029] Step (1), add methylene bisacrylamide, maleic anhydride and isooctyl methacrylate together in ethyl acetate, raise the temperature to 75°C, then add sodium bisulfite, stir and react for 2h under a nitrogen atmosphere;

[0030] Step (2), add pentaerythritol to the reaction solution of step (1), keep the temperature, stir for 20 minut...

Embodiment 3

[0032] A fluid loss control agent used in drilling fluids, including the following raw materials in parts by weight:

[0033] 12 parts of natural asphalt, 6 parts of methylene bisacrylamide, 4 parts of maleic anhydride, 8 parts of isooctyl methacrylate, 0.04 parts of sodium bisulfite, 4 parts of sodium humate, 7 parts of xanthan gum, 5 parts of polyacrylic acid Parts, 0.7 parts of chlorobutanol, 0.2 parts of edetate disodium, 3 parts of triethanolamine, 14 parts of pentaerythritol, 58 parts of ethyl acetate.

[0034] The preparation method of the fluid loss control agent used in the drilling fluid in this embodiment includes the following steps:

[0035] Step (1), add methylene bisacrylamide, maleic anhydride and isooctyl methacrylate together into ethyl acetate, raise the temperature to 70°C, then add sodium bisulfite, stir and react for 1.3h under nitrogen atmosphere ;

[0036] Step (2), add pentaerythritol to the reaction solution of step (1), keep the temperature, stir for 18 min...

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Abstract

The invention relates to a filtrate reducer for drilling fluid and a preparation method of the filtrate reducer, and belongs to the technical field of oil industry drilling fluid treatment agents. The filtrate reducer for the drilling fluid comprises, by weight, 8-20 parts of natural asphalt, 5-8 parts of methylene diacrylamide, 3-5 parts of maleic anhydride, 6-10 parts of methyl methacrylate isooctyl, 0.02-0.06 part of sodium hydrogen sulfite, 3-5 parts of sodium humate, 5-8 parts of xanthan gum, 4-6 parts of polyacrylic acid, 0.5-1 part of chloretone, 0.1-0.3 part of edetate disodium, 1-5 parts of triethanolamine, 10-15 parts of pentaerythritol and 50-80 parts of ethyl acetate. The filtrate reducer has a fine filtrate reducing function and further has the advantages of fine temperature resistance, salinity resistance, collapse prevention, lubrication and the like.

Description

Technical field [0001] The invention belongs to the technical field of drilling fluid treatment agents in the petroleum industry, and particularly relates to a fluid loss control agent used in drilling fluids and a preparation method thereof. Background technique [0002] Drilling fluid is the circulating flushing medium used in the hole during drilling. Drilling fluid is the blood of drilling, also called drilling flushing fluid. Drilling fluid can be divided into clean water, mud, clay-free flushing fluid, emulsion, foam and compressed air according to its composition. Clear water is the earliest drilling fluid used, no treatment is required, easy to use, and suitable for intact rock formations and areas with sufficient water sources. Mud is a widely used drilling fluid, which is mainly suitable for unstable rock formations such as loose, well-developed cracks, easy to collapse and block, swelling and spalling in contact with water. [0003] During the drilling process, due to...

Claims

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Application Information

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IPC IPC(8): C09K8/03
CPCC09K8/03
Inventor 杨月忠
Owner JIANGSU JIANSHEN BIOLOGY AGROCHEM
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