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Synopsis

TITLE:

Reservoir Characterization with the Application of Petrophysics,Rockphysics and Seismic Inversion

INTRODUCTION:

Petrophysics transforms well logs measurement into reservoir properties i.e. porosity,

saturation, permeability mineral component volume estimation.

Rockphysics transform petrophysical result into the elastic properties that can be used for

seismic interpretation. The objective of the rockphysics is to generate elastic logs bulk

density, Vp and Vs which is free from borehole effects, invasion of borehole fluid into thereservoir and to compensate for scale and frequency difference between sonic and sonic

measurement.

Seismic inversion is a sophisticated process of inverting the seismic data into elastic

properties of the reservoir. The purpose of seismic inversion is to make quantitative

inferences about the elastic properties of the Earths subsurface from remote observations.

AIM AND OBJECTIVE:

1. To bulid a relationship model between petrophysical and rockphysics.

2. Seismic Invesion study will be done for the given area and delineate the new

prospective zone for further drilling activities.

METHODOLOGY:

1. Analysis of various Petrophysical parameter.

2. Analysis of various Rockphysical parameter.

3. With the cross-plotting data obtained from various petrophysics and rockphysics

parameter we can characterize the reservoir and its fluid content.

4. Seismic Inversion method which include both seismic data and well data where well

data serves to add the low frequency below the seismic band and to constrain the

inversion.

5. For an inversion study, elastic properties such as P-wave velocity, S-wave velocity,

and density are available from well logs.

6. Seismic data is band-limited as a result of wavelet convolution and it lacks the low

frequency content. It is therefore necessary to capture the low frequency information

from a different source and add it to the inverted seismic data.

7.

The data obtained from seismic inversion can be compared with the data obtained

from rockphysics.

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8. Various crossplots like Vp/Vs versus Vp, P-impedance versus P-velocity, etc. can be

obtained from both seismic inverted data and rockphysical data to study the

comparison.

9.

Seismic inverted analysis with the addition of petrophysics data help us to delineate

the new prospective area.

CONCLUSION:Various study of the area like Petrophysics, Rockphysics and Seismic inversion will help us

to know the area well and delineate the prospective zone both qualitatively and quantitatively

(to some extent) with much more confidence.