Hui Pu

A Numerical Simulation Study on Surfactant Flooding and Its Field Application in Daqing's Pilot Test

Abstract Based on the characteristics of surfactant flooding, a mathematical model for surfactant flooding was established. The changes in adsorption-retention, convection, diffusion of surfactant, and influence of concentration upon the relative permeability curve are included. The novel description of the adsorption quantity of surfactant and the relative permeability curve are presented. The model was applied to surfactant flooding in a surfactant flooding pilot test at Daqing, and the influences of surfactant concentration, amount of injection, and slug combination mode on development effect and economic benefit are quantitatively analyzed, and the injection plan is optimized. After the implementation of surfactant plans in the oilfield, we obtained the desired results.

ASPECTS OF COALBED NATURAL GAS WATER AND OIL RECOVERY 1

The application of coalbed natural gas (CBNG) water injection to improved oil recovery is being investigated. Such application can be permitted as Class II injection. This is more advantageous economically than Class V injection. Therefore CBNG water injection for improved oil recovery is value- added disposal. Use of CBNG water for oil recovery will also reduce the depletion of fresh water aquifers currently used in Wyoming as a source of injection water. The potential for application of low salinity flooding to a specific reservoir requires tests on cores and crude oil obtained from that reservoir. Information will be presented on the Tensleep reservoir rock from the Teapot Dome field that was selected for laboratory tests of CBNG water injection in Wyoming oil reservoirs.