Deep Seismic Bright Spots
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Prediction of Deep Bright Spots Via Gassmann Fluid Substitution and Seismic Amplitude Interpretation in the Vermilion Area, Northern Gulf of Mexico
Author | : Halil Emre Celep |
Publisher | : |
Total Pages | : |
Release | : 2012 |
Genre | : Geophysics |
ISBN | : |
Abstract: the objective of this study is to investigate the deep bright spots observed in the Vermilion area, northern Gulf of Mexico, and assess whether they represent gas sand reservoirs. The study was carried out by Gassmann fluid substitution, seismic amplitude interpretation, and Reuss bound examinations of five study areas in the region. The Davy Jones gas discovery of the McMoRan Company at about 8700 m in South Marsh Island Block 230 (close to the Vermilion area) provided both the motivation and initial reservoir parameters for this study. Tertiary Wilcox sands are the primary reservoir targets of the study. The reservoir conditions of Davy Jones were simulated by coding Gassmann's equations and Batzle's relations in Matlab to study fluid effects and bright spot signatures. Based on reservoir response, the study areas were compared by fluid substitution analysis and seismic amplitude interpretation. Examination included reservoir response for brine and gas saturated velocities, reflection coefficients, and elastic parameters. Furthermore, Reuss bound studies of the areas were originated from brine-and gas-saturated P-wave moduli bounds of Davy Jones, and they increased the confidence of the reservoir response associated with each study area. Adjusted pore pressures, formation temperatures, and stiffness parameters were found to play a key role in characterizations of the areas. The study showed that three of the study areas (N1, N2, and N3) have probable gas bright spot responses, whereas two regions (N4 and N5) show amplitude anomalies inconsistent with gas bright spots.
Seismic Interpretation: The Physical Aspects
Author | : Nigel A. Anstey |
Publisher | : Springer Science & Business Media |
Total Pages | : 641 |
Release | : 2013-11-11 |
Genre | : Science |
ISBN | : 9401539243 |
In this course we shall assume that all participants are familiar with the essentials of seismic prospecting. Thus A the rudiments of the field work -- spreads, sources, arrays B and digital recording -- are assumed known. So also are the C rudiments of processing -- such processes as gain recovery, D filtering, deconvolution, velocity analysis, and display. E Just as important, we shall assume that all participants F have some feeling for the realities of seismic work -- in the l(B) field, under real conditions. Elementary signal theory and the basic techniques of interpretation are also assumed known. However, for certainty, the following pre-course notes include sections reviewing basic signal theory, geophysical aspects of interpretation, and geological aspects of interpretation. These reviews are not intended to be comprehensive. Their function is solely to cover, with the minimum possible discussion, the essential features which will be assumed to be known in the course. None of the course time will be spent on the material of these pre-course notes. Participants are advised that they will not derive full benefit from the course if this background is not known. Most course participants will be already familiar with this material, and will need to do little more than read it through. If, before the course, any participant requires further discussion of signal theory in the same non-rigorous style, he will find it in other writings of the present author, particularly: "Wiggles", Journal of the CSEG, December 1965, pp.l3-43.
Detection of Bright Spots Using Pattern Recognition Techniques
Author | : Kou-Yuan Huang |
Publisher | : |
Total Pages | : 28 |
Release | : 1982 |
Genre | : Pattern perception |
ISBN | : |
Amplitude Studies of COCORP Deep Seismic Reflection Profiling Data from the Basin and Range and Colorado Plateau
Author | : James Roger Mayer |
Publisher | : |
Total Pages | : 158 |
Release | : 1986 |
Genre | : Seismic prospecting |
ISBN | : |
A Petroleum Geologist's Guide to Seismic Reflection
Author | : William Ashcroft |
Publisher | : John Wiley & Sons |
Total Pages | : 176 |
Release | : 2011-03-08 |
Genre | : Science |
ISBN | : 1444397869 |
This book is written for advanced earth science students, geologists, petroleum engineers and others who want to get quickly ‘up to speed’ on the interpretation of reflection seismic data. It is a development of material given to students on the MSc course in Petroleum Geology at Aberdeen University and takes the form of a course manual rather than a systematic textbook. It can be used as a self-contained course for individual study, or as the basis for a class programme. The book clarifies those aspects of the subject that students tend to find difficult, and provides insights through practical tutorials which aim to reinforce and deepen understanding of key topics and provide the reader with a measure of feedback on progress. Some tutorials may only involve drawing simple diagrams, but many are computer-aided (PC based) with graphics output to give insight into key steps in seismic data processing or into the seismic response of some common geological scenarios. Part I of the book covers basic ideas and it ends with two tutorials in 2-D structural interpretation. Part II concentrates on the current seismic reflection contribution to reservoir studies, based on 3-D data.