| In recent years,the main oil producing countries to increase the oil recovery by gas injection(including hydrocarbon gas,CO2,N2,flue gas,air etc.),mixed phase and immiscible flooding research,field test and application of gas injection project is also increasing year by year.Application of gas injection technology in our country basic is still in the indoor experiment and field test stage,small compared with the international level.There is a larger gap.Petrochina tuha oil field gas injection development research and practice was once one of the leading enterprises in the domestic,built in 1998 and 1998,respectively,between Portugal and north oil field gas injection miscible flooding and immiscible gas injection flooding field five blocks pilot test area.The study area is located in three pond of lake basin in low permeability sandstone reservoir,low pressure and low flow degree,conventional water flooding development effect is not ideal,crude oil viscosity and water breakthrough after emulsification phenomenon.First of all,define the static in the study area and the contradictions that exist in the development of dynamic,in order to meet the current development stage of oil reservoir numerical simulation research,improve solution accuracy,for the purpose of through the latest logging interpretation results and combining with production,improve the geological model for dynamic characteristics;Secondly,through the expansion experiment and gas injection profile fitting model research optimizing gas injection displacement medium;Further combining with east history matching of the revised geological model,using orthogonal design method to optimize the proof gas injection reservoir engineering parameters,forecast the solution part research laid a solid foundation.Through the study to seek such reservoirs to improve recovery technique,forming three low note in complex reservoir,and it is concluded that the effective exploitation technology.As gas injection optimization of exploration,evaluation can also hope that through in this study,on the basis of further development is suitable for the continental reservoir optimization evaluation method of gas injection. |
