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Petroleum drilling auxiliary and preparation method thereof

A technology of oil drilling and additives, which is applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of poor high temperature resistance and salt resistance, achieve good heat resistance, stable space position, and improve heat resistance The effect of salt performance

Active Publication Date: 2019-06-21
SHAANXI YANCHANG PETROLEUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a petroleum drilling aid, which solves the problems of poor high temperature resistance and salt resistance of natural polymer fluid loss control agents in the prior art

Method used

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  • Petroleum drilling auxiliary and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A petroleum drilling aid, consisting of the following mass parts: 90g modified humic acid, 25g 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, 10g maleic anhydride acylated chitosan, 10g of modified potassium hexatitanate whiskers with a diameter of 0.2 microns and a length of 8 microns, 1g of nonylphenol polyoxyethylene ether, and 450g of water;

[0037] The specific preparation method is as follows:

[0038] Step 1. Preparation of modified humic acid

[0039] Dissolve 1g of polyacrylic acid in 100g of ethanol to obtain solution A; add 2g of silane coupling agent KH550 to solution A and mix well to obtain solution B; add 20g of yellow humic acid to solution B and sonicate under 300W power Disperse uniformly for 30 minutes, then heat to 60°C, react for 5 hours at a stirring speed of 500r / min, filter after the reaction, and dry the filter residue at 60°C for 5 hours to obtain modified humic acid;

[0040] Step 2. Preparation of modified potassium hexatitanate whiskers

[0041]...

Embodiment 2

[0045] A petroleum drilling aid, consisting of the following mass parts: 80g modified humic acid, 20g 4-hydroxy-6-acetylamino-2-naphthalenesulfonic acid, 12g maleic anhydride acylated chitosan, 5g modified potassium hexatitanate whiskers with a diameter of 1.0 microns and a length of 10 microns, 1.5g of polyoxyethylene octylphenol ether, and 400g of water;

[0046] The specific preparation method is as follows:

[0047] Step 1. Preparation of modified humic acid

[0048] Dissolve 1.5g of polyacrylic acid in 100g of ethanol to obtain solution A; add 2g of silane coupling agent KH550 to solution A and mix well to obtain solution B; add 20g of yellow humic acid to solution B at 300w ultrasonic power Ultrasound for 30 minutes to disperse uniformly, then heat to 70°C, react for 4.5h at a stirring speed of 500r / min, filter after the reaction, and dry at 60°C for 5h to obtain modified humic acid;

[0049] Step 2. Preparation of modified potassium hexatitanate whiskers

[0050] Mix and dissol...

Embodiment 3

[0054] A petroleum drilling aid, consisting of the following components by mass: 100g of modified humic acid, 30g of 4-hydroxy-6-acetamido-2-naphthalenesulfonic acid, 15g of maleic anhydride acylated chitosan, 8g of modified potassium hexatitanate whiskers with a diameter of 0.6 microns and a length of 12 microns, 2g of nonylphenol polyoxyethylene ether, and 500g of water;

[0055] The specific preparation method is as follows:

[0056] Step 1. Preparation of modified humic acid

[0057] Dissolve 2g of polyacrylic acid in 100g of ethanol to obtain solution A; add 2g of silane coupling agent KH550 to solution A and mix well to obtain solution B; add 20g of yellow humic acid to solution B, under 300W ultrasonic power Ultrasound for 30 minutes, disperse uniformly, then heat to 80°C, react for 4 hours under stirring conditions, filter after the reaction, and dry the filter residue at 60°C for 5 hours to obtain modified humic acid;

[0058] Step 2. Preparation of modified potassium hexati...

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Abstract

The invention discloses a petroleum drilling auxiliary, the petroleum drilling auxiliary comprises the following components by mass: 80-100 parts of modified humic acid, 20-30 parts of 4-hydroxyl-6-acetamido-2-naphthalene sulfonic acid, 10-15 parts of maleic anhydride acylated chitosan, 5-10 parts of modified potassium hexatitanate whisker, 1-2 parts of a surfactant, and 400-500 parts of water. The invention further provides a preparation method of the petroleum drilling auxiliary. The modified humic acid and the 4-hydroxyl-6-acetamido-2-naphthalene sulfonic acid in the formula are matched inuse and produce a synergistic interaction, the effects of high temperature resistance and salt resistance of a filtrate reducer are improved, and the particularly excellent high temperature resistanceof the modified potassium hexatitanate whisker reduces the use level of the filtrate reducer in a drilling fluid. The petroleum drilling auxiliary has the functions of resisting the high temperatureof 260 DEG C and resisting saturated salt water, further effectively reduces the filter loss of the drilling fluid, and has a broad application prospect.

Description

Technical field [0001] The invention belongs to the technical field of oil exploitation aids, and specifically relates to an oil drilling aid and a preparation method thereof. Background technique [0002] Fluid loss control agent is one of the most important additives in petroleum drilling. It plays an important role in maintaining stable drilling fluid performance and safe and efficient drilling. The process of free water in the drilling fluid penetrating into the formation under the action of the pressure difference is called fluid loss. Excessive fluid loss often brings many undesirable consequences to the drilling work. For example, the mud cake produced by high fluid loss will adhere to the formation. On the well wall, the hydraulic diameter of the annular space between the wellbore and the drilling tool is reduced, which is prone to sticking accidents. In order to solve the sticking, the high suction pressure used will induce blowout, lost circulation and well collapse. I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/03
Inventor 郝琦李春霞薛迪
Owner SHAANXI YANCHANG PETROLEUM GRP
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