Abstract:
The Purpose of this study is to unveil the reservoir properties of Lower Goru
sands of Kadanwari area in order to estimate the reservoir potential by carrying out
Formation Evaluation technique, supported by computer generated attributes, and
understand the general structural framework 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 i) The Cretaceous uplift of Kadanwari area towards north and west. ii)
The sets of basement-rooted wrench faults oriented in north-west to south- east
fashion in late Paleocene to early Eocene age. iii) The large scale basin inversion
associated with basement related structural elements. The study area is structurally
derived by normal and transtensional nature of forces which exhibits deep rooted and
vertical to sub-vertical faults. The petroleum system in the area is proven and
productive as there are several producing fields nearby. A base map of scale 1:340699
has been produced using KINGDOM 8.4 seismic workstation in order to carry out the
seismic interpretation. Due to data quality constraints, only Kadanwari-3 and
Kadanwari-10 well data have been used to run the petrophysical analysis of the study
area. The horizons marked are Sui main Limestone, Upper Goru, Lower Goru, E and
D Sands, (Based on ENI nomenclature of Lower Goru sand intervals) and Chiltan
Limestone. Time and depth maps have been prepared to acknowledge the extent and
dynamics of the structure at reservoir level which shows that the horizons are
deepening towards east and south of the study area and general trend of the faults lie
in north-west to south-east direction over the study area making structural-cumstratigraphic
traps. The Petrophysical analysis has been conducted for E sand intervals
in both Kadanwari-3 and Kadanwari-10 to test their hydrocarbon potential and carry
out their evaluation. In both wells the E sand interval have been declared as the
effective gas producing reservoir due to its high porosity-permeability and low water
saturation as compared to other sand intervals.
