Flow contribution of multilayer oil system

Abstract

To investigate the condition that kh rule can be applied for flow contribution of multilayer oil system. The controlling factor in case that flow contribution does not obey kh rule is investigated. The investigation used reservoir simulation generation the flow contribution on various cases. The systems for this study are two-layer system and three-layer system. The main system for study is two-layer system while three-layer system used to demonstrate or confirm conclusions for two-layer system to apply for more layer system. The controlling factors that are emphasized for this thesis are flow capacity (kh) and pore volume of layer Ah. In addition, the effect of fluid properties is investigated. From the study flow contributions are controlled by kh rule pore volume of layer Ah rule and not controlled by individual parameters in these groups. Flow contribution obeys kh rule when the flow from the system is at fully flow capacity (kh) and only at starting period of production time. Flow contribution obeys pore volume when the flow from the system is lower than flow capacity and is affected by pore volume due to oil expansion. There are other controlling factors affecting flow contribution, i.e. presence of free gas, pressure depletion, and expandable fluid. Most controlling factors affecting flow contribution are related to energy in the reservoir except kh. There exists effect of fluid properties to flow contribution in the system, but flow contribution is still under influence of flow capacity and pore volume.