1. JGD
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  3. 1(10), 2011
  4. Lithologic, petrophysical and oil recovery properties of reservoir rocks in pakerort horizon and deymenask series of the Baltic sea oil area

Lithologic, petrophysical and oil recovery properties of reservoir rocks in pakerort horizon and deymenask series of the Baltic sea oil area

JGD.
2011;
Volume 10, Number 1
: 94-102
https://doi.org/10.23939/jgd2011.01.094
Received: April 18, 2011
Authors:
  1. M. Yu. Nesterenko
  2. A. Kleinаs
  3. Y.M. Vikhot
  4. A.B. Bodnarchuk
  5. V.V. Ivanov
  6. L.V. Havrylets
1
Lviv branch of UkrGGRI, Lviv Integrated Research Center of UkrNIIgazu
2
ZAO Manifoldas, Gargždai; Institute of Geology and Geography at the Center for Nature Studies
3
Subbotin Institute of geophysics of National Academy of Sciences of Ukraine
4
Lviv branch of UkrGGRI
5
Lviv branch of UkrGGRI
6
Lviv branch of UkrGGRI

According to the results of litho-petrographic investigations the rock reservoirs discovered by Lyzhiay-1 (2129 m), Vezhaiciay-11 (2046,8 m ) boreholes were formed under the coastal-marine conditions, and discovered by the Lyzhiay-1 (2127,6 m) borehole they were formed under the sea shelf conditions. Matrix of the rocks is characterized by high reservoir properties: permeability (taking into consideration the Klinkenberg effect) changes from 0,1×10-15 м2 to 80,1×10-15 м2 and open porosity changes from  4,1 to 13,3 %.

The experiment has shown that in relation to the volume of effective pores and depending on the level of rock permeability, the structure of oil saturation is the following: free oil – 34–67 %, film oil – 30–41 %, absorbed oil – 2–30 %. The coefficient of water-oil displacement  during waterless period is 0,34–0,67 and the maximum coefficient with the usage of secondary oil recovery enhancement methods during watering is 0,46-0,77.

reservoir-rock
open
effective and dynamic porosity
oil saturation structure
oil displacement coefficient
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