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Analysis of wells interaction based on algorithms of complexing geological and field data

UDK: 622.276.34
DOI: 10.24887/0028-2448-2019-1-36-39
Key words: reservoir engineering, wells stimulation, carbonate reservoir, simulation model, formation pressure maintenance
Authors: A.V. Chorniy (Zarubezhneft JSC, RF, Moscow), I.A. Kozhemyakina (VNIIneft JSC, RF, Moscow), N.Yu. Churanova (VNIIneft JSC, RF, Moscow), A.V. Solovyev (VNIIneft JSC, RF, Moscow), M.M. Khairullin (VNIIneft JSC, RF, Moscow), E.V. Yudin (Gazpromneft LLC, RF, Saint-Petersburg)

An important task of field development on the stage of production decline is to enhance oil recovery using well stimulation and waterflooding optimization. Key feature of the article is based on handling with carbonate reservoir. Those types of oil fields involve more detailed studying and detailed acquisition, accurate evaluation of geological-geophysical and field production data. This approach is intended to organize the process of studying carbonates and increase exploration maturity and particularization before development decision is made. Reserves decline of oil fields with fractured carbonate reservoir is crucially complicated due to formation vertical heterogeneity, occurrence of separate filtration pathways and as a consequence poor sweep efficiency of reservoir development both in vertical and lateral direction. As a result – there is a failure to achieve expected level of recovery factor.

There is no clear understanding of mechanism of reserves recovery, quite how the process of oil displacement happens: either in vertical direction or in a layered way. More uncertainties in the research process are brought by active aquifer, reservoir pressure maintenance system directly below the OWC and nonuniform recovery at vertical scale.

In this article various approaches are reviewed to analyze, organize and primary evaluation of field development status using example of locally isolated area of one of the major fields at Central Khoreiver Uplift, consisted of carbonate reservoir. The item is divided into several stages, which form the base of decision-making of field development. A simulation model is chosen as a base tool for project development, which stores findings of primary analysis. Resultant model allows evaluating inter-well effects and choosing maximum preferable variant.


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