Analyzing confirmation of productivity criteria of the pre-jurassic complex by operational drilling results as a means of unlocking the target potential

Lapshina Ya.A. yalapshina@tnnc.rosneft.ru “Tyumen petroleum research center” LLC Tyumen
Ermakov P.V. “Tyumen petroleum research center” LLC Tyumen
Khazipov R.L. “Tyumen petroleum research center” LLC Tyumen
Patrakov D.P. “Tyumen petroleum research center” LLC Tyumen
Zharkov A.V.2, Nabokin I.R. “RN-Nyaganneftegaz” JSC Nyagan
Nabokin I.R. “RN-Nyaganneftegaz” JSC Nyagan
DOI: 10.24412/2076-6785-2022-8-44-47

Abstract
“RN-Nyaganneftegaz” JSC is developing two license blocks within Krasnoleninskoye oil and gas condensate field with unique reserves:
Em-Egovsky + Palyanovsky and Kamenny (Western part) blocks.
The study and development of the pre-jurassic complex is associated with a number of complications:
•    low coverage by core studies;
•    the lack of unambiguous methods for interpreting net-reservoirs within the complex based on well logging data;
•    low correlation between well productivities and oil net pays, taking into account fracturing, which complicates the estimation of start-up flow rates;
•    high variability in the startup performance of wells drilled at a short distance at similar geological conditions.

Materials and methods
One of the development targets is the pre-jurassic complex which
is being developed within the Kamenny (Western part) license block. Despite the insignificant initial recoverable reserves of the target,
0,6 % of the total Kamenny block reserves, the startup flow rates
of up to 80 t/day (the average startup rates for directional wells are about 20–25 t/day) produced by some directional wells indicate a significant development potential of this target.

Keywords
kamenny license block, pre-jurassic complex, fracturing, BH acid treatment, seismic attributes
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