The Research On The Optimization Of SAGD Heavy Oil Development Of SAGD In The Xin Jiang Oilfield Is 32 Blocks

Aimed at the development for the heavy oil,thesteam assisted gravity drainage(SAGD)is a innovation technology.Adopting reasonabledevelopment method in heavy oil reservoir,we will achieve very satisfactory results in developmenteffects and economic benefits.Therefore,the research of SAGD technology for the exploitation of heavy oil reservoirs is very important.For SAGD technology of dual horizontal wells,this paper is based on theoretical study and numerical simulation.In the theoretical study,we analyzed the basic principle of SAGD,and mainly described the flooding mechanism and well pattern of SAGD,at the same time,we studied the adaptability of the steam-assisted gravity drainage from two aspects including geological and fluid,and finally summed up the screening criteria of SAGD exploration.Based on the CMG software,this paper established the reservoir numerical model,and took up numerical simulation method.first of all,aimed at the recycle preheat phase of double horizontal wells in SAGD,this paper studied related parameters and then got the reasonable preheating parameters;Then we studied the rule of the expansion of the steam chamber for double horizontal wells and the influence factors,and selected reasonable injection-production parameters of the two wells in production stage;Finally,through the 3d model,we carried on the physics experimentby changing the injection temperature,injection rate and injection pressure,thus we obtained produced fluid and oil production of the two horizontal wells,and got the optimal experimental conditions,and verified the accuracy of the results of numerical simulation in within the scope of the physical experiment,therefore,we chose the optimal injection-production condition,in guarantee the recovery efficiency,so as to achieve the maximum of the economic effect.