Study On The Gravity Fire-flooding Exploiting Technology In Heavy Oil Block,Liaohe Oilfield

At present,as in China a number of heavy-oil reservoirs have entered high rounds steam stimulating stage,ISC is a technology with great potential to succeed while gravity-fire flooding technology is an improved in-situ combustion technology,which introduces a horizontal production well and gravity drainage on the basis of conventional fire flooding techniques as an advanced fire-flooding mining technology in fire flooding.However,the gravity fire flooding technology is not yet widely applied and its succeeding rate is not relatively high induced by the distribution network of the area well,therefore it's urgent to develop well patterns of gravity-fire flooding technologies and optimize the scientific researching system.This study takes heavy-oil blocks in Liaohe oilfield as the typical researching objective,analyses deeply the mechanism of gravity fire-flooding mining technology from theoretical analysis and laboratory experiments angle,and finally verifies the feasibility combining the characteristics of Liaohe heavy-oil reservoirs;then,it analyses the process of physical change and chemical reaction from the quantitative perspective,and builds the mass conservation equation and energy conservation equation;lastly,the study mainly analyzes five kinds of well pattern of the pros and cons,screens the pattern which are applied to thin heavy-oil reservoirs or a thick layer of heavy oil reservoirs cloth well program by CMG reservoir numerical simulation and explores the key sensitive factors in-depth.This researching results will provide a good foundation parameters and assessment program for heavy-oil reservoirs,which is of great significance and value.