Tackifier for drilling fluid, and drilling fluid

Abstract

The invention provides a tackifier for a drilling fluid. The tackifier is composed of a viscosity increasing agent and a dispersant, wherein the viscosity increasing agent is one or more of graphene-based substances, gum polymers, and nanoparticles; and the dispersant is one or more of coco glucoside, lauryl glucoside, sodium dodecylbenzenesulfonate, and sodium oleate. At the same time, the invention also provides the drilling fluid, and the drilling fluid comprises the following components in parts by weight: 64-70 parts of base oil; 1-3 parts of organic soil; 16-20 parts of calcium chloridebrine; 1-3 parts of an emulsifier; 1-3 parts of a filtrate reducer; 0.5-1.5 parts of a wetting agent; and 0.02-1.5 parts of the tackifier for the drilling fluid. Under the condition of a relatively small addition amount of the tackifier, a viscosity of the drilling fluid can be greatly increased, and the structural force of the drilling fluid is enhanced. At the same time, the drilling fluid in which the tackifier for the drilling fluid is added can improve the quality of a filter cake, a filtration loss amount of the drilling fluid is reduced, and the stability of a well wall is improved.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling chemical materials, in particular to a viscosifier for drilling fluid and drilling fluid. Background technique [0002] During the drilling process, in order to ensure that the drilling fluid has a high viscosity and good rheology under low solid phase, it is usually necessary to add a viscosifier to increase the viscosity of the drilling fluid. Drilling fluid viscosifiers are usually water-soluble polymers with very long molecular chains. The mechanism of viscosification: first, the network structure formed by the bridging of polymers can enhance the structural viscosity of drilling fluid; second, free polymer molecules Can increase the viscosity of the aqueous phase. Drilling fluid viscosifiers can not only play the role of viscosification, but also often serve as shale inhibitors (coating agents), fluid loss reducers and flow pattern improvers. Therefore, the use of viscosifiers is ...

AI Technical Summary

Problems solved by technology

The above-mentioned drilling fluid viscosifiers mainly have large dosage and performance needs to be further improved