Field-geophysical research of horizontal wells in low unstable inflow

UDK: УДК 550.832:622

Key words: production-logging tool in horizontal wellbore, spectral noise logging , diagnosis of intense local inflows, different time observations

Authors: A.A. Kolesnikova, M.I. Kremenetskiy, A.I. Ipatov, I.V. Kovalenko (Gazpromneft NTC LLC, RF, Saint-Petersburg, RF, Sain-Petersburg), V.S. Komarov, G.M. Nemirovich (Messoyakhaneftegaz JSC, RF, Tyumen)

local inflows, different time observations

Today Horizontal and deviated wells found strong using in the field development schedule, because of their high efficiency in the extraction of hydrocarbons. Using such wells related with significant complication works, both in drilling and the planning and conduct geophysical research and interpretation of the getting results. The article discusses the possibility of informative geophysical studies (PLT) in determining the inflow profile of horizontal wellbore under unstable flow rate and low draw down pressure. It has been shown that the addition of a standard set of PLT and water-cut log with gauges distributed over the cross section of the wellbore, and spectral noise logging allows to successfully identify contrasting inflow rates (in case with the oil reservoir with high specific yield, breaking water and gas). The control the dynamics of filling the wellbore on the unstable state start-up or change of draw down pressure is necessary condition for the effectiveness of research. Methods of geophysical investigations at this stage of knowledge of the field needs to be considered not only in the "traditional" context, as a development control tool, but also as a method of further exploration of the deposit and the possibility of obtaining additional information regarding the mining characteristics of the exposed geological bodies, the study based production potential of the effective length horizontal wells drilled in cyclites different genesis.
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