Joint reports


Neogene Prospectivity Review


  • The executive companies: Geology Institute, BP and STATOIL ALLIANCE
  • The year of publication: May 1995
  • Code: EXT 69900
  • Volumes: total 2. Volumes with appendixes in same amount: 1
     


EXECUTIVE SUMMARY


This report presents the results of a joint study between the Geology Institute of the Azerbaijan Academy of Sciences (GIA) and the BP and Statoil Alliance to investigate the remaining prospectivity within the essentially Pliocene "Productive Series" succession of Azerbaijan.


The South Caspian Basin contains prolific hydrocarbon reserves. An estimated 26 billion barrels (oil equivalent) have been found to date and some yet to find estimates are as high as a further 30 billion barrels oil equivalent. 99% of known reserves are within reservoirs of the Productive Series. However, hydrocarbon production in Azerbaijan is currently in decline and new reserves need to be located. This study therefore addresses the question of what prospects remain for finding more hydrocarbons within the Productive Series, and in particular, for locating them in regions outside of the main area of structures which have already been drilled and which have been producing hydrocarbons for many years.


Two case studies are presented, one looking at the potential of the Lower Kura region (particularly in the relatively unexplored Lower Productive Series); the other considering the prospectivity of the Mugan Homocline region (south-west of the Kura Valley), where pinch-out of the Productive Series provides a series of underexplored plays.


To supplement these case studies and to build on previous collaborative studies between the GIA and the BP and Statoil Alliance, field work and various sample analyses have been carried out. This field work has concentrated on two aspects of Productive Series geology: firstly, the upper part of the Productive Series, which was relatively unexamined during our earlier joint work; and secondly, localities outside the Apsheron Peninsula region, which allow for a comparison of the sedimentation styles, petrography and prospectivity of the Palaeo-Kura and Palaeo-Volga river systems which were the prevalent depositional controls during Productive Series sedimentation. Detailed sedimentological logging, followed by petrographic and biostratigraphic analyses have improved our understanding of the depositional environments, stratigraphy, reservoir connectivity, reservoir architecture and reservoir quality of the Productive Series and thus provided major insights into the future hydrocarbon prospectivity of Azerbaijan.
 

CONTENTS


(i) Executive summary
(ii) Contents List


1. INTRODUCTION

1.1 Aims and Scope of the Study
1.2 Methods
1.3 Report Organisation
1.4 Roles and Responsibilities


2. SEDIMENTOLOGY

2.1 Introduction
2.2 Outcrop Sedimentology
2.3 Petrography and Reservoir Quality
2.4 Conclusions


3. FAULTING WITHIN THE PRODUCTIVE SERIES

3.1 Introduction and Objectives
3.2 Kirmaky Valley
3.3 Balakhany Quarry
3.4 Balakhany Foreshore
3.5 Aktapa Bridge
3.6 Conclusions


4. BIOSTRATIGRAPHY

4.1 Introduction
4.2 Results of Outcrop Studies
4.3 Conclusions


5. PROSPECTIVITY WITHIN THE PRODUCTIVE SERIES OF THE LOWER KURA VALLEY

5.1 Introduction
5.2 History of Exploration and Production
5.3 Lithofacies Characterisation
5.4 Depositional Environments
5.5 Future Prospectivity


6. PROSPECTIVITY WITHIN THE MUGAN HOMOCLINE REGION

6.1 Introduction
6.2 History of Research
6.3 Lithostratigraphy
6.4 Structure and Tectonics
6.5 Future Prospectivity
6.6 Conclusions


7. SELECTED BIBLIOGRAPHY


APPENDIX 1: Graphic Logs
APPENDIX 2: Petrographic Analyses
APPENDIX 3: Reservoir Quality Tables
APPENDIX 4: Biostratigraphic Data