Spectrometric nuclear-physical methods of research of wells during development and supplementary exploration of oil and gas fields under the late stage of operation

Authors: T.V. Khismetov (GEOTECHNOKIN NTC CJSC, RF, Moscow), G.G. Yatsenko (Tvergeophysics NTC OJSC, RF, Tver), I.F. Rustamov (Gazprom Neft OJSC, RF, Saint-Petersburg), D.I. Yurkov (N.L. Dukhov All-Russia Research Institute of Automatics, RF, Moscow), A.M. Brekhuntsov (Siberian Scientific and Analytical Centre, RF, Tyumen)

Key words:spectrometric nuclear physics research methods, carbon-oxide logging, deposit, residual oil saturation, dropped deposits, depletion of reserves, volumetric data, mineralogical composition of the rocks.

The article presents new opportunities and results of an effective control of the processes of the development and supplementary exploration of oil and gas fields under the late stage of operation , based on the application of complex spectrometric nuclear-physical methods of well survey. Nuclear-physical methods are the only direct methods of assessing the material constitution of the rocks of studied deposit, its saturation by formation fluids in a cased hole.

Radioactive logging multiparameter equipment , including 73 mm diameter one for wells of different design and offshoots, produced by N.L. Dukhov All-Russia Research Institute of Automatics in partnership with Tvergeophysics NTC OJSC and GEOTEKHNOKIN NTC CJSC, found its widespread industrial application at oil facilities in Russia.

Comparison of modern foreign analogues and pulsed neutron logging equipment of new generation shows, that the new domestic equipment surpasses foreign analogues in technical and economic efficiency. Program- methodical organization of processing and interpretation of the results of spectrometric nuclear-physical methods of well survey, generated in Tvergeophysics NTC, provides high efficiency of the works and reliability of the received information.

Widespread use of nuclear-physical methods of well survey complex in oil and gas fields in Western Siberia , Orenburg region , the Volga region , the Krasnodar Territory, the Komi Republic allowed to use the received results of research in the solving following problems:

- reserve addition and supplementary exploration of oil and gas deposits

- commingling and return to other process facilities;

- study of small diameter wells and offshoots;

- address technology of bottomhole formation zones treatments;

- geomodeling of deposits for operational decision-making for the geological and technical measures execution ;

- control of the parameters of the secondary formation exposing.

Practically all oil and gas facilities under operation for a long time (10-50 years and more) in Western and Eastern Siberia, Volga-Urals , Orenburg region , Stavropol and Krasnodar regions , the Komi Republic, etc. are promising to reserve addition.