The usage of impulse-code interference technology during water flooding in difficult geological conditions

UDK: 622.
DOI: 10.24887/0028-2448-2018-6-102-106
Key words: areas of reserves recovery, interwell space, impulse-code interference, reservoir pressure maintenance
Authors: I.V. Kovalenko (Gazpromneft NTC, LLC, RF, Saint-Petersburg), G.M. Nemirovich (Messoyakhaneftegas JSC, RF, Tyumen), I.R. Iliasov (Messoyakhaneftegas JSC, RF, Tyumen), A.V. Buyanov (Polycod LLC, RF, Moscow), D.N. Gulyaev (Polycod LLC, RF, Moscow)

During the oil reservoir development it is very important not only to know the correct prediction of wells behavior but also areas of reserves recovery for proper waterflooding management and for the planning of new wells drilling. This knowledge will allow to make simulation model not only on the basis of data from wells but also on the data from crosshole space that will certainly increase the quality of geological model and understanding of the dynamics of processes occurring in reservoir.

This paper presents the interwell space researching during the work of oil and water injection wells by the method of pulse-code interference. The proposed approach allows specifying geological model of the reservoir by direct measurement of the instrument and giving recommendations to the development of the considered oilfield.

We give an example of use of pulse-code interference at highly compartmentalized area with low reservoir properties of the layer PK1-3 of Vostochno-Messoyakhskoye fields. The research was made on the well cluster No. 39 in the cyclite B. Modes of operation of two injection wells were changed for a given algorithm. In producing oil wells the incoming disturbance were recorded with decoding of the received signals. As a result of research the response of the pressure disturbance were successfully detected in the majority of intervals, effective oil-saturated thicknesses in the inter-well space were refined. It was also determined that the front of water takes place primarily in net pay thickness (there were suggestions that the water will go down into the underlying water thickness). During water injection it is not expected to have fast water breakthroughs by thin highly permeable layers.

After these researches recommendations were given for expansion of the system of reservoir pressure maintenance by water injection in areas with similar geological structure of the PK1-3 of Vostochno-Messoyakhskoye oilfield.


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