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Hesabatlar

Regional Tectonic Features of the Middle Kura Depression

Regional Tectonic Features of the Middle Kura Depression

  • The executive companies: GIA / First Exchange Corporation
  • The year of publication: 2000
  • Code: FEC 3136
  • Volumes: total 2
    volumes with appendixes in same amount: 2

EXECUTIVE SUMMARY


Middle Kura Regional Tectonic Study, Vol.1 (Geophysical Fields and Paramaters),
Vol.2 (Geological Interpretations)


Productive Series (Middle Pliocene) widely developed in offshore Azerbaijan and adjacent onshore parts is the main petroleum-bearing suite in the region.


As to older deposits, they are prospective in the Yevlakh-Agjabedi trough. Ecomonical oil-gas content in the area has been proved already. Oil pools in the deposits of wide stratigraphic range (Akchagylian, Sarmatian, Chokrakian, Maikopian, Eocenian, and Upper Cretaceous) have been developed for an extensive period.


The region is characterized by the complicated tectonic structure, presence of some structural levels, unconformable structural layout, presence of hiatuses in sedimentation, intense dislocation of the deposits, occurrence of magmatic volcanism in the past and so on. All these created specific settings for petroleum formation and accumulation processes, development of various type traps for oil and gas including those having reservoir confined to eroded surface of effusive rocks.


In connection with the above stated, effectiveness of exploration works in the area is not sufficiently high.


To date over 60 structures were discovered within the Yevlakh-Agjabedi trough, for only 15 structures either economical oil and gas content was proved or economical oil inflow discovered.


One of the methods of raising effectiveness of petroleum exploration is a detailed study of peculiarities of regional structure of the Middle Kura depression based on the integrated reivew of all geophysical exploration methods and interpretation o their results with regard to drilling data.


Just to cover this problem this problem the Atlas is published. It includes two volumes. In the first volume, the following regional geophysical parameters are indicated:

  • Magnetic
  • Electric
  • Gravity
  • Seismic
  • Radioactivity
  • Thermal


At the same time this volume contains the study results of regional gas geochemical field of near-surface deposits.


The second volume
 contains the results of geological interpretation of geophysical fields. These studies are reflected as a series of regional structural maps on the surface of individual stratigraphic units (Miocene, Maikop, Eocene, Cretaceous), regional geological-cross-sections, regional well log correlation, regional lithofacial maps, regional thickness maps of separate stratigraphic units.


All these graphic materials are accompanied by the explanatory text. Finally, conclusions reflecting the author’s position on prospective and future directions for the search of new economical hydrocarbon accumulations are presented.


Geophysical fields (gravitational, seismic, electromagnetic, thermal, radioactive) of the Middle Kura depression are available to illustrate the regional tectonic study.

Geological Evaluation of the South Caspian Basin, Using 2-D Basin Modeling Software (SIGMA-2D) (not for sale)

Geological Evaluation of the South Caspian Basin, Using 2-D Basin Modeling Software (SIGMA-2D) (not for sale)

  • The executive companies: GIA / Japan National Oil Company
  • The year of publication: October 2001
  • Code: -
  • Volumes: total 1
    volumes with appendixes in same amount: 2

EXECUTIVE SUMMARY


Japan National Oil Company (JNOC) jointly with Geology Institute of Azerbaijan National Academy of Sciences (GIA) intended to initiate the Basin Modeling Study in order to reevaluate the hydrocarbon potential of the region by using our own simulation software called as SIGMA-2D. This internal report is aimed at reviewing the hydrocarbon potential in the South Caspian Basin anf giving the future perspectives in this region. This study mainly covers the following subjects:


Japan National Oil Company (JNOC) jointly with Geology Institute of Azerbaijan National Academy of Sciences (GIA) intended to initiate the Basin Modeling Study in order to reevaluate the hydrocarbon potential of the region by using our own simulation software called as SIGMA-2D. This internal report is aimed at reviewing the hydrocarbon potential in the South Caspian Basin anf giving the future perspectives in this region. This study mainly covers the following subjects:


The present report includes Regional Geology, Seismic Interpretation, Basin Modeling by SIGMA-2D, Input Parameters for SIGMA-2D as well as Basin Modeling Results: Burial History, Formation Temperature Calibration and Prediction, Pore Pressure Calibartion and Prediction, Source Rock Maturity Modeling, Hydrocarbon Generation Modeling, Hydrocarbon Migration and Accumulation Modeling.


CONTENTS

1. Executive Summary


2. Introduction


3. Regional Geology

3.1 Tectonic Setting3.2 Basement Rocks of the South Caspian Basin3.3 Plate Reconstruction of the South Caspian Basin3.4 Stratigraphy3.4.1. Basements3.4.2. Oligocene3.4.3. Miocene to Pliocene3.4.4. Pleistocene to Holocene3.5. Petroleum Geology3.5.1. Source Rocks3.5.2. Reservoir Rocks


4. Seismic Interpretation

4.1. Seismic Data4.1.1. Seismic Data Utilized in This Study4.1.2. Data Quality of Seimic Data4.2. Preparation of Submarine Topographical Map4.2.1. General Features4.2.2. Licensing / Rightholding Blocks4.3. Interpretation of Seismic Data4.3.1. Seismic Resolution4.3.2. Interpreted Horizon4.3.3. Interpretation Results4.3.4. Depth Conversion4.4. Explored Structures4.4.1. Nakhchevan Field4.4.2. Neft Dashlari Field4.4.3. Guneshli / Chirag / Azeri Fields4.4.4. Kapaz Field4.4.5. Tegiev Zeinalabdin Structure4.4.6. Shah Deniz Field4.4.7. Umid Structure4.4.8. Inam Structure4.4.9. Kurdashi and Araz Deniz Structures4.4.10. Talysh Deniz Structure4.5. Unexplored Prospects and Leads4.5.1. Nakhchevan Lead4.5.2. Yanan Tava and Atashkakh Leads4.5.3. Satalyn Block4.5.4. Eastern Outside of Inam Block4.5.5. Lerik Deniz, Dalga, Janub & Savalan Block4.5.6. C Memmedguluzade Lead (D8, 10 Block)4.5.7. Verizov Lead (Zafar & Mashar Block)4.5.8. Alov, Araz & Sharg Block4.5.9. Cobanzade Lead


5. Basin Modeling by SIGMA-2D

5.1. Petroluem Geology5.1.1. Oil and Gas Fields in the South Caspian Basin5.1.2. Source Rock5.1.3. Reservoir Rocks5.1.4. Seal Rock5.2. Well Log Data Analyses5.2.1. Horizon Setting5.2.2. Sand Ratio Map5.2.3. Sand Distribution and Paleo-Delta System5.3. Petroluem Geochemistry5.3.1. Source Rock Potential
 

  • Maykop Formation
  • Diatom Formation


5.3.2. Oil-Source Rock Correlation5.3.3. Source Rock Maturity5.3.4. Crude Oil-Source Rock Correlation5.4. Basin MOdeling by SIGMA-2D5.4.1. Role of Basin Modeling in Exploration Work5.4.2. Outline of SIGMA-2D5.4.3. Modeling Lines5.5. Input Parameters for SIGMA-2D5.5.1. Stratigraphy5.5.2. Thermal History5.5.3. Lithology5.5.4. Source Rock Potential5.5.5. Fluid Properties5.6 Basin Modling Results5.6.1. Burial History5.6.2. Formation Temperature Calibration and Prediction5.6.3. Pore Pressure Calibration and Prediction5.6.4. Source Rock Maturity Modeling5.6.5. Hydrocarbon Generation Modeling5.6.6. Hydrocarbon Migration and Accumulation ModelingPetroleum System


6. Conclusion


Akcnowledgement


References


List of Figures


List of Tables


List of Enclosures


Attachment

Stratigraphic Model of Deposits in South Caspian Basin

Stratigraphic Model of Deposits in South Caspian Basin

  • The executive companies: GIA / Mobil
  • The year of publication: 1994
  • Code: -
  • Volumes: total 1
    volumes with appendixes in same amount: 1

EXECUTIVE SUMMARY


It was studied a total of eight (80) thin sections from the South Caspian Basin of Azerbaijan and Turkmenistan to Reservoirs, Inc. for petrographic analysis. These thin section examples had been impregnated with blue-dyed epoxy to highlight porosity and stained with sodium cobaltinitrate to distinguish potassium feldspar grains. Point count modal analysis (250 points) was conducted on seventy-eight of the seventy-nine thin sections to provide semiquantitative estimates of framework grain components, pore-filling constituents, and types of visible pore space. The other sample consisted predominantly of drilling mud solids so no point counting was conducted. Point count results accompany each of the thin section photomicrograph plates.


The samples are moderately to well-sorted (rarely poorly sorted), coarse siltstones to lower coarse sandstones. Compositionally, they are lithic arkoses, litharenites, feldspathic litharenites, subarkoses and sublitharenites.


Undifferentiated carbonate cement is the principal pore-filling constituent along with locally abundant anhydrite. Undifferentiated (authigenic clays) are locally abundant.


In some samples, integranular pores are well preserved and well interconnected.

CONTENTS

  1. Tectonic features, geological structure of shelf zones of the South Caspian
  2. Petrographic analysis of clastic rocks from the South Caspian Basin
  3. Reservoirs quality in oil fields and prospective structures


3.1 Lower Kura depression3.2 Baku Archipelago3.3 Absheron Archipelago and Absheron-PreBalkhan sill3.4 Absheron p-la


  1. Appendix. Litho-geological profiles and litho-stratigraphic sections
The Mesozoic succession of the eastern Greater Caucasus (Azerbaijan); preliminary fieldwork results and significance for the evolution of the Central Caspian Basin

The Mesozoic succession of the eastern Greater Caucasus (Azerbaijan); preliminary fieldwork results and significance for the evolution of the Central Caspian Basin

  • The executive companies: Geology Institute
  • The year of publication: 2004
  • Code: -
  • Volumes: total 1 volumes with appendixes in same amount: 2

SUMMARY


This report presents field observations of the Mesozoic (Mid Jurassic to Late Cretaceous) section of the eastern Greater Caucasus of Azerbaijan, following a field campaign in October-November 2004.  Understanding the Mesozoic geology and evolution of the area is relevant for exploration of the offshore Central Caspian Basin, to the northeast. Preliminary sedimentological and paleontological field results are discussed. The geological context and database of the samples selected for paleontological and heavy mineral sandstone provenance analysis is presented.


The examined Mid Jurassic succession consists of  low energy basinal deposits and sandstone turbidites.  Clastic deposits are derived from source areas to the north and ?northeast. The Late Jurassic succession, when present, consists of carbonate reefs and associated slope deposits. The Late Jurassic section however is often missing, and an important unconformity separating the Mid Jurassic and Early Cretaceous sections is deduced. Ongoing palaeontological studies will constrain these observations.


The Early Cretaceous succession consists of carbonate distal shelf deposits, grading into Mid Cretaceous forereef deposits and organic-rich shelf/turbiditic deposits. A prominent unconformity, probably of Cenomanian age, separates the mid and Late Cretaceous strata. This erosional event is marked in the southern flank of the Greater Caucasus by widespread volcanic activity. This event can be correlated with similar events in the Lesser Caucasus, where it has been related to reactivation of northward-directed subduction. Late Cretaceous deposits consist of turbiditic distal shelf and basinal deposits.


Sediment provenance during the Jurassic and Cretaceous, from paleocurrent indicators, is from source areas to the north-northeast in the northern Greater Caucasus. Provenance is however from the south during the mid and Late Cretaceous in the southern flank of the Greater Caucasus anticlinorium. This southern sediment provenance for the mid and Late Cretaceous sediments in the southern flank had not been previously described.


Two major changes in basin evolution, with associated unconformity development, have been identified in the Mid-Late Jurassic to Early Cretaceous, and in the Late Cretaceous (Cenomanian). The main tectono-stratigraphic events identified in the eastern Greater Caucasus are likely to be present in the Central Caspian Basin, given its evolution in a similar tectonic setting, and have an influence on sediment distribution patterns. A preliminary view of the possible facies distribution in the Central Caspian during the Jurassic and Cretaceous, based on fieldwork observations, is given. Results of ongoing paleontological and provenance analysis, as well as future fieldwork in the Mangystau Mountains of Kazakstan will help constrain these preliminary interpretations.

 


CONTENTS


1 SUMMARY


2 INTRODUCTION


3 GEOLOGICAL SETTING


4 FIELD GEOLOGY OF THE EASTERN GREATER CAUCASUS


4.1 AREA 1, NORTHERN FLANK. KONAKHKEND-YERFI, Localities 1-31 (Panels 1-6)


4.1.1 Mid Jurassic (Panel 3)


4.1.2 Late Jurassic section (Panel 6)


4.1.3 Early Cretaceous section (Panel 2, 4, 6)


4.1.4 Mid Cretaceous section (Panel 2, 5, 6)


4.1.5 Late Cretaceous (Panel 2, 4)


4.2 AREA 2,  NORTHERN FLANK. CHIRAX-GIULE, Localities 32-40 (Panels 7, 8)


4.2.1 Mid Jurassic


4.2.2 Late Jurassic (Early Cretaceous)


4.3 AREA 3, NORTHERN FLANK. ALTYAGACH, Localities 41-50 (panel 9, 10)


4.3.1 Mid Cretaceous


4.3.2 Late Cretaceous


4.4 AREA 4, SOUTHERN FLANK. LAGICH, Localities 50-53 (Panels 11, 12)


4.4.1 Mid Cretaceous


4.4.2 Late Cretaceous


5 GEOLOGICAL EVOLUTION: DISCUSSION 


6 CONCLUSIONS


7 ONGOING ANALYSIS AND FUTURE WORK


8 REFERENCES