The Study of High Capacity Channels Genesis and Formation Conditions in Block M Liaohe Oilfield

摘要

In high water cut stage, reservoir heterogeneity is the main cause leading to uneven use of the reservoir and increasing the development difficulty of remaining oil. High capacity channels is a direct result of development differences. The determination of high capacity channels formation conditions has important guiding significance to determine the distribution rule of high capacity channels and make enhanced oil recovery. In this paper, with the data of different periods coring wells, dynamic and static data of production wells, the causes and conditions for the formation of are analyzed, then it's concluded that unconsolidated rock, high oil viscosity, long-term high intensity of water is the main reason for the formation of high capacity channels, the key condition for the formation of high capacity channels is reservoir properties and heterogeneities, high capacity channels are More easily formed in reservoirs where permeability is between 100-10000, porosity is between 25-30%, Heterogeneity coefficient is greater than 2 and thickness is greater than 3m.