TITLE:
Quantitative Characterization and Dynamic Law of Interlayer Interference for Multilayer Commingled Production in Heavy Oil Reservoirs by Numerical Simulation
AUTHORS:
Dong Liu, Fengyi Zhang, Qin Zhu, Xinran Wang, Jing Fan
KEYWORDS:
Heavy Oil, Interlayer Interference, Multilayer Commingled Production, Pseudo Start Pressure Gradient, Water Flooding
JOURNAL NAME:
World Journal of Engineering and Technology,
Vol.7 No.3,
August
6,
2019
ABSTRACT: This paper moves one step forward to buildanumerical model to research quantitative characterization and dynamic law for interlayer interference factor (IIF) in the multilayer reservoir which was heavy oil reservoirs and produced by directional wells. There are mainly four contributions of this paper to the existing body of literature. Firstly, an equivalent simulation method of the pseudo start pressure gradient (PSPG) is developed to quantitatively predict the value ofIIFunder different geological reservoir conditions. Secondly, the interlayer interference is extended in time, and the time period of the study extends from a water cut stage to the whole process from the oil well open to produceahigh water cut. Thirdly, besides the conventional productivity interlayer interference factor (PIIF), a new parameter, that is, the oil recovery interlayer interference factor (RIIF) is put forward.RIIFcan be used to evaluate the technical indexes of stratified development and multilayer co-production effectively. Fourthly,theeffectsof various geological reservoir parameters such as reservoir permeability and crude oil viscosity, etc. on thePIIFandRIIF’stype curvesarediscussed in detail and the typical plateisplotted. The research results provide a foundation for the effective development of multilayer heavy oil reservoirs.