Viscoelastic Surfactant Diverting Agent AC-VES
Product Detail:
Diverting acid is an acid system that contains no solid particles or polymers and is mainly composed of viscoelastic surfactants. Under fresh acid conditions, diverting acid has low viscosity, which helps reduce the frictional resistance of the acid and makes it suitable for high-displacement pumping. As the diverting acid reacts with the carbonate rock in high-permeability zones, the acid concentration decreases continuously, and a large amount of MgCl₂ and CaCl₂ are generated. This reduces the electrostatic repulsion between molecules, forming a gel system with a three-dimensional network structure, and the acid viscosity increases rapidly. Thereby, it selectively plugs the high-permeability zones, forces the acid to flow into low-permeability zones, and achieves the purpose of self-diversion.
AC-VES diverting agent is a viscoelastic surfactant with a relatively special structure. When used at a low dosage and combined with specific auxiliaries such as corrosion inhibitors and iron ion stabilizers, it can form a diverting acid system with excellent self-diversion characteristics. Additionally, this diverting acid system exhibits good high temperature resistance and shear resistance, along with a low corrosion rate and excellent compatibility with crude oil and formation water. When mixed with crude oil, it can achieve rapid gel breaking, thereby improving flowback efficiency.
Features:
Low dosage with higher peak viscosity over 1000mPas(60°C , 10s-1).
Excellent High Temperature and Shear Resistance.
The compatibility, corrosion resistance, iron ion stability, demulsification and other properties of the diverting acid system all exhibit excellent performance, with outstanding diversion performance.
VES Acidizing system has good temporary plugging and diversion capacity and can effectively improve the reservoir utilization degree.
Application :
Applicable to diverting acid systems, it enables the stimulation of multi-layer and heterogeneous reservoirs. Compared with traditional acidizing technology, this diverting acid features ready-to-use formulation, low fluid loss, easy flowback, and low formation damage. It can achieve non-damaging in-situ self-diversion of acid, so as to reach the goal of uniform acidizing for heterogeneous carbonate reservoirs.
Parameters:
| Item | Specification |
| Appearance | Colorless to light yellow transparent liquid |
| pH | 5-7 |
| Density | 0.85-1.0 |
| Peak viscosity(20%HCI+4%AC-VES), 60°C , 10s-1 | ≥ 700mpas |
