The experience of heavy oil deposits development using multilateral wells with simultaneous – separate operation with two elevators

UDK: 622.276.56
DOI: 10.24887/0028-2448-2017-4-96-99
Key words: drilling, carbonate reservoirs, horizontal wells, multi-branched horizontal wells, dual completion of multilateral wells with two elevators, dynamics of various constructions wells exploitation parameters, development efficiency
Authors: R.S. Khisamov (Tatneft PJSC, RF, Almetyevsk), R.R. Huzin, A.Sh. Miyassarov, D.A. Salikhov (Carbon-Oil LLC, RF, Almetyevsk), V.E. Andreev (Institute of Oil & Gas Technologies and New Materials of the Republic of Bashkortostan, RF, Ufa), I.A. Galikeev (SPC Gorizont LLC, RF, Izhevsk)

The results of drilling and exploitation of heavy oil deposits, complexly built carbonate reservoirs of the bashkirian stage wells of various constructions are seen in the article. Bashkirian stage, in its turn is characterized by high degree of heterogeneity, low capacitor filter properties, weak hydrodynamic link with a formation, together with interwell zones.

It is the first experience in Tatarstan of drilling and development of multilateral wells of complex architecture with two horizontal shafts and selective operation of each trunk using the technology of simultaneous – separate operation with two elevators. Only domestic equipment (together with whipstock) is used during the process of construction, well completion and operation.

Comparative characteristics of well performance are presented in dynamics. Accumulated oil production during the examined period of operation depending on a construction, show the efficiency of using horizontal technologies in comparison with a traditional ways of drilling out. Average results of different constructions well pressure recovery curves interpretations are given. Taking into consideration the rate of fall in actual production rates of drilled inclined and horizontal wells, an increase in the selection rate from initial to current recoverable reserves is revealed.

On the basis of actual results of wells operation technical – economic parameters of various constructions wells are calculated. The directions of further work development on the areas of horizontal technology deposits, events for increasing the wells operation efficiency are offered. Exploitation of heavy oil deposit by horizontal wells let to shorten the period of oil-field development at the expense of higher selection rates and improve economic indicators of the project


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