Drilling mud treating agent containing humic acid

Abstract

The invention provides a drilling mud treating agent containing humic acid. The treating agent is prepared from the following substances by weight: 5-15 parts of modified humic acid, 1-10 parts of maleic anhydride acylated chitosan, 2-9 parts of modified potassium hexatitanate whiskers, 9-18 parts of nonylphenol polyoxyethylene ether, 2-15 parts of linear polysiloxane, 5-20 parts of microcrystalline wax, 1-6 parts of hydroxyl aluminum, 45-50 parts of polyacrylamide, 8-12 parts of potassium hydroxide, 20-30 parts of carboxymethyl cellulose, 8-10 parts of sodium lignosulphonate, 0.1-0.5 part ofsodium tetraborate, and 0.2-0.9 part of a polyacrylonitrile amine salt. Through compounding of the components, the drilling mud treating agent has the functions of a filtrate reducer, also has the functions of high temperature resistance and salt resistance, and is stable in property.

Description

technical field [0001] The invention relates to the field of petroleum exploitation, in particular to a drilling mud treatment agent containing humic acid. Background technique [0002] In oil drilling, the stability of mud performance plays an important role in the safety of the well and the improvement of drilling efficiency, and it can form pancakes on the well wall to prevent collapse, reduce fluid loss and protect the wall. [0003] Filtrate reducer is one of the most important additives in petroleum drilling, it plays an important role in maintaining the stability of 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 pressure difference is called fluid loss. Excessive fluid loss often brings many adverse consequences to the drilling work. For example, the mud cake produced by high fluid loss will adhere to the On the well wall, the hydraulic diameter of the annu...

AI Technical Summary

Problems solved by technology

Natural polymer fluid loss control agents such as humic acid, cellulose, lignin, starch, etc. are widely used in oil extraction because of their low price and wide range of sources. For high-temperature and high-salt reservoirs, these natural polymer fluid loss control agents generally do not have the functions of high temperature and salt resistance, which limits their application range

[0004] When solving the problem that the fluid loss control agent containing humic acid does not have the functions of high temperature resistance and salt resistance, the inventor found that simply compounding high temperature resistance and salt resistance components with humic acid would easily cause the fluid loss control agent to be unstable. prone to accidents

Images