Anti clay swelling agent

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In a broad sense, all inorganic salts can play an anti-swelling role in clay, but they usually refer to high-valence metal particles such as kh, nh4, Ca2 + and a13. Through cation exchange, they are exchanged to the surface of clay particles, thus effectively inhibit the surface permeation and hydration of clay. The inorganic base is mainly koh,. In addition to the inhibition of hydration by k +, the passivation between oh and clay surface results in the decrease of hydration ability, which takes place at a higher temperature (above 100 ℃) and a longer period of time. In deep well, the effect is obvious. The advantages of this kind of clay anti-swelling agent are wide source, low price and simple use method. It is especially suitable for short-term stabilization of clay. However, because it acts through ion exchange adsorption, it is reversible. That is, when the ion environment changes, they may be replaced or desorbed, thus returning to the original state of water sensitivity. Therefore, its stability effect on clay is conditional, it is difficult to stabilize clay for a long time under dynamic conditions, and it is not easy to be long-term. At the same time, it can only inhibit hydration and can not effectively prevent the migration of particles.

It is a kind of high efficient clay expansion inhibitor, which is developed for formation clogging of stratum clay expansion. It is the purpose of preventing clay expansion and reducing reservoir damage by exchanging the polymer ion and inhibiting the diffusion double layer effect of clay.

Alias: Clay inhibitors

Specification ：

Appearance: white or light yellow powder

PH value : 8.5-7.5

Solid content (Solids/%) ：95±2

Ion type: cationic copolymers

Features:

high temperature, shear resistance. Not sensitive to pH value. It can be soluble in water in any ratio.

Uses and advantages:

as anti swelling agent, anti swelling rate ≥ 90%, the dosage of 1-3%.

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