Abstract:
The Purpose of this study is to unveil the reservoir properties of Lowe Goru sands of Kadanwari
area in order to estimate the reservoir potential by carrying out Fonnation Evaluation technique,
supported by computer generated attributes, and understand the general structural framework
deciphered through integrated approach of seismic interpretation. The Kadanwari area belongs to
the Middle Indus Basin where the stratigraphic sequence ranges from middle Jurassic to upper
Pliocene ages. The area has been subject to complex deformation and declared to be evolved in
three main tectonic events 1) The Cretaceous uplift of Kadanwari area towards north and west. 2)
The sets of basement-rooted wrench faults oriented in north-west to southeast fashion in late
Paleocene to early Eocene age. 3) The large scale basin inversion associated with basement related
structural elements. The study area is structurally derived normal and trans tensional nature of
forces which exhibits deep rooted and vertical to sub-vertical faults that emerges in negative
flower structure at shallow level.
Although the quality of the seismic data is not effective enough to resolve discrete geological
features at deeper level due to complex structuration and dynamic forces, but the seismic
signatures somehow reveal very critical discontinuities among the Goru reservoirs when aided by
seismic attributes. The petroleum system in the area is proven and productive as there several
producing fields nearby. A base map of scale 1:50000 meters have been produced using Geoframe
2012/Petrel seismic workstation in order to carry out the seismic interpretation and attribute
analysis. Due to data quality constraints, only K-3 well data well have been used to run the
petrophysical analysis of the study area.
The horizons marked are G Sands, E Sands, and D Sands ( Based on ENI nomenclature of Lower
Goru sand intervals ). Time and depth maps have been prepared to acknowledge the extent and
dynamics of the structure at reservoirs level which shows that the horizons are deepening towards
east and west of the study area and general trends of the faults lie in north-west to south-east
direction over the study area making structural-cum-stratigraphic traps. The Isopach map of G
sand suggests that the area is variable in thickness from north-west to south-east. The seismic
attributes show that E sand has the satisfactory amplitude and frequency response that is required
to meet the criteria of any gas bearing zone within the formation.
