Industrial experiment at the Novo-Khazinskaya area of the Arlan field – 60 years later

Abstract

The article presents the results of the Novo-Khazinsky industrial experiment on the well grid density (WGD), taking into account the change in the understanding of the geological structure and current development indicators. The final oil recovery factor was determined, conclusions about the effect of well grid compaction on this indicator were summarized. It is shown that the well grid compaction at an early development stage in the conditions of heterogeneous layers of the Lower Carboniferous terrigenous strata (LCTS) of the Arlan field is expedient and significantly affects the final oil recovery factor (ORF). The increase in the final oil recovery factor from the WGD compaction from 14.7 to 10.3 ha/well with the organization of a rigid reservoir pressure maintenance system (RPM) is estimated at 0.125-unit fraction. The absence of the WGD influence on the geological and technological measures (GTM) effectiveness in terms of restoring oil production has been established. The efficiency of such well interventions is largely influenced by the geological and physical parameters of the well bottomhole formation zones and the well operation technological parameters. The results obtained can be used to analyze and improve the efficiency of existing development systems. Further study of the WGD impact on development indicators (on the example of a field experiment at the Akineevsky and Cherlak experimental sites of the Arlanskoye field) is of significant scientific and practical interest. Keywords: oil fields development; Arlan oil field; Novo-Khazinsky experiment; well grid density; oil recovery factor.