Study On Cyclic Steam Stimulation In Low Permeability High Viscosity Thin Oil Reservoir

This research is based on thermal recovery method pilot area of ChaoYangGou as an example, conducts the low permeability thin reservoir cyclic steam stimulation research, through the steam injection mechanism analysis, the oil reservoir and the intermediate layer attribution research, proved the feasibility of cyclic steam stimulation and the technical application. After the computation analysis the insulating pipe column on the effect of the cyclic steam stimulation, the reasonable tube is designed. In order to enhance the cyclic steam stimulation development effect, the commercial software STARS thermal recovery model was used to conduct the cyclic steam stimulation numerical simulation separate study for the Chao146-70 well group and 142-69 well group. The research taking Chao 146-70 well composition the region as the simulator study region, additional, taking Chao146-70 well as the cyclic steam injection well, when did the research starts, the first turnover cycle has been completed, the certain performance data was obtained, this well group water drive stage, the cyclic steam stimulation first cycle was chose to carry on the historical matching, optimizing second cycle the injected parameter. the parameter mainly includes: injection rate, injection quantity, injection cycle, shut-in time, the production well drainage quantity and so on. Basing on the obtaining the cyclic steam stimulation numerical simulation study experience, carrying on the water drive stage history matching to Chao 142-69 well group, and the development effect of the turnover are predicted, the finally development effect of the different turnover plans has given about the region, the reasonable development plan are optimized, that used to guide the cyclic steam stimulation lease test for this well group. Finally, through the analysis of actual development condition for the pilot area, from the three respect of the technical maturation, the development index and the economic index has made the overall estimation about the development effect, the condition...