Abstract: Shengli Oilfield, rich in heavy oil resources, still has nearly 3.20×10⁸t proven reserves that have not been effectively developed after years of technical research and development. In order to realize the effective development of nonproducing reserves of different types of heavy oil reservoirs, the reserves characteristics and development difficulties were systematically analyzed, the heavy oil reservoirs were divided into five types, namely sensitive heavy oil, deep low-permeability heavy oil, super heavy oil, edge-bottom water heavy oil and ultra-thin layer, and development countermeasures were prepared for different types of nonproducing reserves with comprehensive application of physical modeling, numerical simulation, laboratory testing, and other methods. It was found in the study that sensitive heavy oil reservoirs could be developed with technologies such as moderate sand production, heavy oil viscosity reduction and cold recovery, and oil layer combustion; deep low-permeability heavy oil reservoirs could be developed with technologies of fracturing assisted solubilization and viscosity reduction, and viscosity reduction and displacement; super heavy oil reservoirs could be developed with E-SAGD, HECS and other EOR technologies to improve the fluidity of crude oil; edge-bottom water heavy oil reservoirs could be developed with bottom-water steam flooding, viscosity reduction and cold recovery, and microbial oil recovery to reduce the effect of edge-bottom water on development; the thin heavy oil reservoirs could be developed mainly with short-radius horizontal well, and fracturing + viscosity reduction and cold recovery to increase the controlled reserves of single well. The technologies and findings obtained in the study are of great significance in guidance and reference for the development of similar reserves at home and abroad.

Key words: heavy oil reservoirs, nonproducing reserves, reserves evaluation, development countermeasures, in-situ upgrading, Shengli Oilfield