A STATIC RESERVOIR CHARACTERISATION STUDY IN A
GAS AND OIL FIELD, SOUTH CASPIAN BASIN, WESTERN TURKMENISTAN
This study
covers static reservoir characterization of a field in Western Turkmenistan.
The field produces from multi-compartment reservoirs of young clastic sedimentary rocks of Pliocene and Pleistocene in
age, called Lower Red Bed Series (LRBS).
Distribution
of reservoir parameters like shaliness, effective
porosity, net pay thickness, water and hydrocarbon
saturations is mapped for each of individual producing horizon. Besides,
seismic amplitude changes are also used for fluid type
prioritization. Then, all these data are integrated
into a new parameter called Best Reservoir Property Index (BRPI) that is
actually the arithmetical summation of normalized grid values of each of the
reservoir parameters. BRPI maps are
simple to understand and they also make interpretation
easier and faster. Thus, they can be used to derive
quicker solutions related to each producing horizon.
It has been found out that there is structural control in
distribution of hydrocarbons; gas-bearing zones being at the top, oil zones
below and water-bearing zones towards flanks of the structure.
According to
BRPI maps, northern part of the field exhibits better reservoir properties than
southern part except F2 horizon. B1, B2, D2, and E Horizons are the best
horizons where excellent reservoir characteristics observed both in northern
and southern part of the field. Southern part is usually characterized by worse
and unevenly distributed BRPI indices, especially in A2, C1, C2, D1 and G horizons.
Related Publications