Atlases and maps


Geochemical Atlas of Azerbaijan Oils (completed, 1998)



  • The executive companies: Geology Institute and First Exchange Corporation
  • The year of publication: 1998
  • Code: -
  • Volumes: total 2
     volumes with appendixes in same amount: -


EXECUTIVE SUMMARY


At the present time about 80 fields located in 9 oil and gas onshore and offshore areas have been recognized and developed in Azerbaijan. Oil production is realized from wide hypsometric (from several tens up to 6000 m) and stratigraphic (Cretaceous-Upper Pliocene) intervals. Thermobaric conditions of occurrence depth for oil and gas horizons can be characterized by temperature values from 280 to 1500 C, and pressure from 0,3 up to 80 MPa.


The types of traps (arch, tectonically-, stratigraphically-, lithologically screening, underthrust) and facial content of reservoirs (volcanogenic, carbonaceous, sandy) containing oil are also characterized by significant variety.


The types of stratal waters contacting with oil deposits (hydrocarbonaceous natrium, chloride-calcic, chloride-magnesium, sulphatene-natrium) are very different.


All variety of above-mentioned in combination with such genetic factors as facial-geochemical surrounding of Paleobasin, type of initial organic matter, character of migration of water-gas and oil fluid and also the degree of catagenic matemorphism and hypergenesis of oils determine the wide spectrum of their physical-chemical features, recognized as a result of long analytical research.


At present thousands analyses characterizing the different parameters of oils in all fields of Azerbaijan have been carried out in Republic and overseas laboratories. However the results of these analyses incomplete, non-systematized and chiefly they have not been published. All these make essentially different their usage.


For the first these gaps has been filled out by Geology Institute of Azerbaijan Republic where large digital analytical material has been gathered and generalized and as a result the unique computer data base and its publishing as "Geochemical Atlas of Azerbaijan Oils" has been made due to unified scheme.


There are a number of important parameters characterizing thoroughly every oil, its content, physical-chemical and marketable features, genetic essence, catagenetic level of formation, the degree of biodegradation, etc. Such parameters, given in the catalogue, are as follows: density, beginning of boiling, fractional composition in the interval up to 1500 - 3000C higher; sulphur content, viscosity, group hydrocarbon composition of benzine fraction (up to 2000C) with separation of methane, aromatic and naphthene combinations, structural-group composition of the number of aromatic and naphthene rings (RA-RN), and also the quantity of methane, aromatic and napthene atoms of carbon (CM, CA and CN), and also the component composition with determination of oils, resins (petroleum-effiereal (essential), benzoline and alcoholic-benzoline), asphaltenes and carbenes; the results of gas-liquid chromatographia of the normal alkanes; isotope composition of carbon in alkane and aromatic fractions; the data on the biomarker parameters, including the ratios of pristane to phithane (Pr/Ph), pristane to n-C17, phithane to n-C18, the distribution of the normal steranes (nC27:nC28:nC29), the relation of 18a(H)-22, 29,30 - trisnorneohopane to 17a(H)-22, 29, 30 - trisnorhopane (Ts/Tm), and also oleanane index (18a(H) oleanane/C30 hopane); the content of the microelements (Ni, V, Fe, Co, Cu, Cr, Mn, Sr, Ba, Mg).


Atlas consists of the introduction part and the main part. In the introduction the geological-geochemical factors, influencing upon the formation of Azerbaijan oil composition are examined, their genetic types for each oil-gas bearing series are determined. The said cartographical material, made with the help of computer, illustrates the regularities of the distribution of oil main types and separate parameters of their composition on regional plan on the main oil-gas bearing series, regions and separate large deposits of this or that region. These parameters are as follows: paraffin content, benzin fraction emanation, the ratios of pristane to phistane, isotope composition of carbon, and also the distribution of some elements and their ratios.


The second and main part of the Atlas contains all the analytical information, represented as a standard sheet, consisting of 7 group tables and characterizing one oil sample. Analytical information about each sample given in the catalogue is accompanied with the structural chart of the deposit with the place of sampled well, interval and stratigraphical horizon of the sampling. And also the graphical illustration of the curve of gas-liquid chromatograph of the normal alkanes and diagrams of gaschrommaspectrometry of terpanes and steranes.


CONTENTS

 

Volume I: Lower Kura depression

  • Introduction
  • A brief geological characteristics of Lower Kura Depression
  • Geochemical characteristics of the oils of Lower Kura Depression
  • The maps of distribution of important parameters of the oils of the Lower Kura Depression

  1. Map of distribution of the carbon isotopes of the saturated fraction of the oils
  2. Map of distribution of pristan/phitane ratios in the oils
  3. Map of disrtinution of trisnorneohopane/trisnorhopane (Ts/Tm) ratios in the oils
  4. Map of distribution of oleane index in the oils
  5. Map of distribution of benzine fraction content in the oils
  6. Map of distribution of the paraphin in the oils
  7. Map of distribution of the sulphur in the oils
  8. Map of distribution of the oil fraction in the oils
  9. Map of distribution of the resins in the oils
  10. Map of distribution of the asphaltene in the oils
  11. Map of distribution of the vanadium in the oils
  12. Map of distribution of the nickel in the oils
  13. Map of distribution of the vanadium/nickel ratios in the oils
  14. Map of change of the normal sterane C29 / normal sterane C27 ratios in the oils
  15. Map of change of the oil maturity coefficient (K*)

  • The plates with results of the oil analyses of the Lower Kura Depression

  1. The oils of Kurovdag field
  2. The oils of Kursanga field
  3. The oils of Garabagly field
  4. The oils of Mishovdag field
  5. The oils of Kalamaddin field
  6. The oils of Neftchala field
  7. The oils of Pirsaat field
  8. The oils of Kichik Kharami field
  9. The oils of Khilly field

  • Explanation of symbols and abbrevations used in tables
  • Keys of the deciphering of the biomarker GCMS diagrams


Volume II: Offshore Azerbaijan (Baku and Absheron archipelagoes)

  • Introduction
  • A brief geological characteristics of the oils and gas regions of the aquatorium of the South Caspian (the Absheron abd Baku archipelagoes)
  • Brief geochemical characteristics of the oils of Azerbaijan offshore (Absheron and Baku archipelago)
  • The maps of distribution of important parameters of the oils of Absheron and Baku archipelago

  1. Map of distribution of the carbon isotopes of the saturated fraction of the oils
  2. Map of distribution of pristan/phitane ratios in the oils
  3. Map of disrtinution of trisnorneohopane/trisnorhopane (Ts/Tm) ratios in the oils
  4. Map of distribution of oleane index in the oils
  5. Map of distribution of benzine fraction content in the oils
  6. Map of distribution of the paraphin in the oils
  7. Map of distribution of the sulphur in the oils
  8. Map of distribution of the asphaltene in the oils
  9. Map of distribution of the vanadium in the oils
  10. Map of distribution of the nickel in the oils
  11. Map of distribution of the vanadium/nickel ratios in the oils
  12. Map of change of the normal sterane C29 / normal sterane C27ratios in the oils
  13. Map of change of the oil maturity coefficient (K*)

  • The plates with results of the oil analyses

  1. The oils of Gunashli field
  2. The oils of Chilov adasi field
  3. The oils of Azeri field
  4. The oils of Neft Dashlari field
  5. The oils of Pirallahi island field
  6. The oils of Kapaz field
  7. The oils of Palchig Pilpilesi field
  8. The oils of Darvin Kupesi field
  9. The oils of Janub field
  10. The oils of Nakhchivanni field
  11. The oils of Absheron Kupesi field
  12. The oils of Sangachal field
  13. The oils of Here-Zira and Bulla-deniz field
  14. The oils of Duvanni-deniz field
  15. The oils of Alat-deniz field
  16. The oils of Garasu field
  17. The oils of Gum field
  18. The oils of Bakhar field

  • Explanation of symbols and abbrevations used in tables
  • Keys of the deciphering of the biomarker GCMS diagrams