The Reservoir Fine Description Of Es2 8-10 Sand Group In Tuo7 Block In Shengtuo Oilfield

After more than 50 years of development,Es2 8-10 sand group in tuo7 block in shengtuo oilfield has entered the later stage of development with extremely high water content,the remaining oil is highly dispersed and development costs continue to rise.There is still a lack of understanding on the sandbody architecture,dynamic heterogeneity of reservoir,residual oil distribution and other aspects of the reservoir,which brings great difficulty to the long-term economic benefit development of the old oil field.In this article,through the study of single sedimentary facies identification technique,the sedimentary facies distribution characteristics and combination mode of tuo 7 Es2 8-10 sand group were characterized,and the internal configuration of the sand body was characterized.By establishing the second interpretation model of phase-controlled logging,the accuracy of logging interpretation is effectively improved,and the changes of dynamic heterogeneity are further described,and the residual oil distribution characteristics of this block are summarized.This study provides a theoretical basis and technical method for the residual oil dredging of Es2 8-10 sand group in tuo7 block and similar blocks.By implementing specific pattern,injection-production adjustment,perfect segmentation water injection,etc,oil recovery rate of this block goes from 0.31% to 0.37%,development costs fell by 7.4%,diminishing natural control within 8%,development effect are improved significantly.