A Field Parameter Test for the Design of Seismic Survey in Highly Faulted Subsurface area Muglad Basin

Abstract

ABSTRACT

Although high resolution seismic survey techniques are powerful tools for imaging subsurface

complex geological structures, but the expensive field efforts often limit their

applications in commercial exploration projects. It will be shown that initial survey design

based on target horizons requirements, the result of pilot test of 2D seismic records, and

generation of vertical mini stack sections , these have the potential to increase significantly

the resolution of the acquired data, with less costs.

A complex geological and geophysical model extracted from existing data is used to calculate

the imaging requirements of several sub surface layers. Fifteen energy source patterns, two

receiver array patterns and three different spread geometries with three vertical mini stack

sections were tested in Nuggara Oil field, Muglad basin, to determine the optimal choice of

receiving and shooting parameters.

By adopting a certain quantitative and qualitative analysis, it is found that registered

reflection events contain high resolution when shorter spreads with smaller bin size are used

with less explosive charge size than in expected acquisition parameters.