Production Evaluation Of Steam Huff And Puff Of Staged Well Completion For Horizontal Wells In Heavy Oil

With the application and promotion of staged well completion technology in heavy oil reservoirs,it is particularly important to carry out research on production changes under this type of development.On the basis of summarizing the characteristics of staged throughput production in heavy oil reservoirs,the development law of ultra-heavy oil reservoirs was understood,and the subdivision well completion technology was used to develop the type of diminishing production of such reservoirs,accurately predicting the development of sectional well completion technology.The production of heavy oil reservoirs,thus guiding development and production.The dissertation studies the characteristics of the segmented throughput of heavy oil reservoirs in the Z32 segment completion area.It is found that the segmented wells have the features of self-injection production after production of open wells,and the cycle oil production,cycle oil-gas ratio and cycle time are analyzed.Changes in the index of injection,etc.;study the law of oil production in the segmented throughput cycle of heavy oil reservoirs,and determined that the decline in production is in line with the law of exponential decline;and the numerical simulation study of the mechanism of the segmented completion technology was conducted.Sub-completion wells have better synergy effect for super heavy oil thermal recovery than ordinary completions,making the periodic peak oil production peak appear in the second cycle,showing the production characteristics of ordinary heavy oil;taking into account the different number of open sections The impact of the development of segmented well completions was studied in terms of geological parameters,staged well completion parameters,and injection and production parameters.It was found that the number of open sections was not effective for increasing production capacity;when studying the parameters of sectional completion,it was found that The number of open segments and the distance between the open channel and the end of the blind pipe have a great influence on the productivity of horizontal wells;the grey correlation analysis method is used to determine the sensitivity of various factors affecting the development effect of heavy oil segmented throughput.It was found that the cycle injection,steam dryness,and suction section length were relatively sensitive factors;finally,on the basis of numerical simulation,a multivariate linear regression method was used to establish the consistency of two-stage completion under consideration of multiple factors.Model of oil throughput throughput decline model.