जर्नल ऑफ़ फिजिकल केमिस्ट्री एंड बायोफिज़िक्स
खुला एक्सेस

अमूर्त

Effects of Polymer Injectivity Concentration on Time-Variation Relative Permeability

Mahamat Tahir Abdramane Mahamat Zene, Ruizhong Jiang, Liu Xiu Wei

Polymer flooding is a set Enhance Oil Recovery (EOR) which is considered as best candidate for the mature hydrocarbon reservoir. Many polymer flooding projects been carried on successfully around the world, but there are still non understood effects of polymer flooding. One of the main effects is the polymer injectivity loss or polymer plugging which is the major affecting factor on the reservoir. The increase in polymer viscosity injection is a major influence for polymer injectivity reduction, as well others mechanism such as; mechanical, debris, permeability reduction, and water quality.

In this research some effects of polymer injectivity concentration time-variation are investigated as following:

Polymer entrapment during polymer injectivity, left debris in the reservoir, polymer rheology, mechanical degradation, and permeability reduction are the main effecting factors.

When the liquid rate decreased in function of polymer injectivity time-variation phase change concentration, production rate has improved in function of time-variation phase change.

The dynamic change of reservoir in each iteration step is updated to achieve stable, reliable and continuous characterization of reservoir permeability changes, and objectively reflects the changes in the permeability of long term polymer flooding reservoirs and the effects of oil-water motion laws. The stability and reliability of the reservoir numerical results are guaranteed.