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Raduzhny, Russia

Klyushin I.G.,RN Management OJSC Branch in Tyumen | Novikov N.V.,RN Management OJSC Branch in Tyumen | Gilmutdinov B.R.,RN Management OJSC Branch in Tyumen | Ryazanov A.A.,Samotlorneftegaz OJSC | And 2 more authors.
Neftyanoe Khozyaistvo - Oil Industry | Year: 2013

To enhance acid treatment efficiency in saline well stock wells it has been suggested to add powder oxyethylidenediphosphonic acid to fluid solutions. Laboratory tests showed that this results in calcite dissolving and acid penetrating into the formation rock capacities efficiency enhancement and also it effects in dissolving and prevention of secondary precipitation of iron hydroxide sedimentation. Acid solutions tests with addition of the oxyethylidenediphosphonic acid in field conditions showed high efficiency of these treatments for scaling inhibition after putting wells back on production. Some wells were indicated to show efficient acid treatment. Achieved productivity index ration was also preserved for a longer period of time. Source

Romanchev M.A.,Varyoganneftegaz OJSC | Chernyh D.G.,Varyoganneftegaz OJSC | Kirillov A.I.,Varyoganneftegaz OJSC | Zelenov I.A.,Varyoganneftegaz OJSC | Nakraynikov A.A.,Varyoganneftegaz OJSC
Neftyanoe Khozyaistvo - Oil Industry | Year: 2013

A comprehensive approach was proposed to improve the efficiency of development of complex and large field with low permeability reservoir. The approach included testing of the development technology of multi stage hydraulic fracturing in horizontal wells and well operation with step-by-step implementation of additional study program. The project was launched in November 2012 when two first directional wells were spudded. These wells were used for studies: core was taken, extended logging suite was carried out, production logging program was completed and formation fluid samples were taken. First project stage resulted in almost complete removal of subsurface uncertainties concerning well placing which led to change of well direction. Also the height and the direction of fracture were determined with the help of tools and fracture propagation in horizontal wellbore was estimated. Such approach when a wide set of challenges at initial stage is met allows us to be sure that chosen engineering solutions are suitable. Source

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