The influence of reservoir rock fractures on the efficiency of geotechnical jobs on the Yamal oilfields

Abstract

Abstract At present, the majority of Yamal oilfields are characterized by low debits. That is why geotechnical jobs (GTJ) are conducted here to increase oil production. Thus, this article analyzes predicted and actual efficiency of GTJ on nineteen Yamal oilfields in 2010-2017. Therefore, the purpose of the article is to provide information on the quantity and efficiency of GTJ on Yamal oilfields as well as to interpret the results obtained. The question is how reservoir rock fractures influence GTJ. So, much attention is given to the efficiency of hydraulic fracturing operation (HFO) in relation to the rate of field tectonical diversity. In fact, our analysis shows that physical and chemical methods take the leading place among the quantity of actual operations. It was also found that the biggest incremental oil production was obtained from drilling horizontal drain holes, but the smallest quantity – from remedial cementing. Furthermore, the results presented here show the dependence of HFO efficiency on the rate of field diversity. In conclusion, actual data prove that double permeability of reservoir rock increases the efficiency of well perforation, HFO and physical and chemical methods as well as its dependence on the rate of field diversity. The findings are of direct practical relevance.