AJDANLIJSKY, GEORGE K.
The Lower Triassic Sediments in the North Bulgaria are an important oil and gas reservoir. They are predominantly fluvial, braided-sandy successions with eolian intervals. The main task of the study of their reservoir properties is the correct modeling of the sedimentary geometry and numerical estimation of the reservoir capacity of these heterogeneous sediments.
Detailed lithofacial sections will be prepared using standard schematic procedure for determination of different fluvial and eolian types of selected outcrops and cores, covering all sedimentary types in the economically producing area. Architectural-element analysis with determination of 3-D architectural units of different order will be carried out using collected 2-D lithofacies data and measurements of all types of paleocurrent indicators. The porosity and permeability of selected architectural units will be measured experimentally and in thin sections with estimation of the primary porosity and degree of lithofacies alteration. The results will be used to specify internal 3-D geometry of the studied successions and for typization of the architectural unites in them according to their reservoir properties. The different, both by quality and order, reservoir unites will be defined after computer processing of the data obtained and their correlation with available logs of the outcrops and wells studied.
A complex database applicable
reinterpretations and correlations
existent well logs from
locations will be developed.
The final result
expected is to develop more
for estimation of the properties
heterogeneous oil and gas
AAPG Search and Discovery Article #90940©1997 AAPG Foundation Grants-in-Aid