Concept of production facilities’ selection on multilayer oil-gas condensate fields in Yamal-Nenets Autonomous District

Abstract

In the Russian terminology, the production facility is determined as a productive layer or a group of layers, extraction of hydrocarbons from which will be carried out by a unified well network. The gathered experience of multilayer oil and gas fields’ development sometimes demonstrates falsity of decisions in the selection of production facilities applied at the initial stages of development when the volume of initial information necessary for design is very limited. High degree of study is characteristic for drilled fields when decisions concerning selection of production facilities are already determined and only their adjustment is possible. At initial stages, practice of interconnection of a considerable number of layers in an integrated production facility was often applied that brought to insufficiently complete production of separate productive intervals, reducing the efficiency of hydrocarbon raw materials extraction from Earth subsoil. The scheme of production facilities’ selection in multilayer Southern Russian and the Beregovoye oil-gas condensate fields, which consists in the stage-by-stage analysis of each criterion, presented in the article regarding the possibility of layers’ interconnection in united development facilities, is presented in the paper. Decisions of operational objects’ selection by the presented algorithm are approved and have been used in works on the techno-economic justification of oil recovery coefficients on considered fields. The proposed solutions allow one not only to reach high rates of hydrocarbon raw materials’ extraction, but also to avoid decline in economic activity at late development stages of the field caused by the necessity of additional well stock drilling at layers’ separation, which were connected at an initial stage by mistake.