Geological features and prospects for development of low-permeability carbonate reservoirs of podveryuskoye oil field

UDK: 622.276.1/4.(470.41)

Key words: revised geological model, low-permeability reservoirs, pilot development

Authors: R.S. Khisamov (Tatneft PJSC, RF, Almetyevsk), A.G. Khabibrakhmanov, V.B. Podavalov (Oil and Gas Production Department Bavlyneft, RF, Bavly), Yu.P. Kemaeva (TatNIPIneft, RF, Bugulma), L.M. Mironova (NAUKA OOO, RF, Bugulma))

The Podveryuskoye oil field in the Arkhangelsk Region is developed by Oil and Gas Production Department Bavlyneft (Tatneft PJSC). The productive intervals are made of the Ovinparmskian low-porosity and low-permeability carbonate reservoirs dated to the Lower Devonian. The field’s complex geology is attributed to faults dividing the D_I formation into separate blocks with very poor, if any, connectivity. The connectivity can only be determined in the process of field development based on pressure behavior. Productive zones with improved reservoir properties were identified based on the seismic surveys data, and the latter were used as a basis for planning of exploration and further exploration programs. Reservoir development system was selected based on geological and reservoir modeling data. Lack of infrastructure adds to difficulties. Commercial production of the Podveryuskoye oil field demands ample investments. Two exploratory wells are planned for drilling, followed by the full-scale waterflooding field development. Considering that there is no breakthrough of bottom water, hydrofracturing will be the most optimal method to enhance productivity of low-permeable reservoirs. A pilot development area in the central part of the reservoir will also be formed to test waterflooding technologies. In the process of planned wells drilling, geological parameters will be controlled by the at-bit sensor. Design solutions will be updated as new drilling and well data are available.
References
1. Patent no. 2203405 RF, MPK7 E 21 V 43/20, Method of development of oil
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6 block of Bavlinskoye oil field"), Bugul'ma, Publ. of TatNIPIneft', 2006.