Abstract:
This thesis is based on 2D seismic reflection data and well logs to find the
porosities from seismic velocities and correlate with total porosities from well data. The
data is acquired from the area of Meyal, Upper Indus Basin (Punjab) of Pakistan, provided
by the Landmark Resources (LMKR) with the permission of Directorate General of
Petroleum Concession (DGPC). Five seismic sections having line numbers along with
Base Map are 97-MYL-10, 97-MYL-11, 93-MYL-02, 97-MYL-06, and 97-MYL-12 lines.
Out of these five seismic lines; 97-MYL-10, 97-MYL-11, 93-MYL-02 and 97-MYL-06
are dip lines. The remaining line, 97-MYL-12 is a strike line. Root mean square are also
provided with the seismic section at selected Common Depth Points (CDPS) and are used
for the calculation of velocities to convert the given time into depth. Five reflectors were
marked due to their prominent reflection on the seismic sections. The two way travel time
structural map for each reflector has been drawn and depth contour map of reservoirs has
also been drawn by using velocity and one way travel time. Moreover, cross sections in
time and depth domains have also been drawn.TheMeyalarea is dominated by
compressional regime where the thrust faults are dominated. By using well log data of
Meyal-08P, the petrophysical analysisshows the characteristics of hydrocarbon bearing
zone which confirms the results of the 2D seismic interpretation. The porosities calculated
from seismic velocities Vp using the relation of Gardner equation to find the density and
then applying the Time- Average equation and confirming the result by comparing with
the result of porosities from petrophysical analysis. The total porosities are preferred in
comparing with seismic velocities because both seismic and total porosities give the
overall pore voids in a rock.
