Department of geochemistry and fluid dynamics of sedimentary basins
Head of department Dr., professor, corresponding member of ANAS Feyzullayev Akbar Akbar oglu
Tel.: +(99412) 5101163
Fax: +(99412) 5372285
E-mail: [email protected]
The main directions:
- geology and geochemistry of organic matter of oil and gas ;
- mud volcanism;
- fluid dynamics of sedimentary basins;
- basin modelling;
- development of geological-geochemical criteria for oil and gas search;
Study of oil systems in South Caspian Basin (SCB):
- A huge bulk of researches dealing with organic matter (OM) of outcrop rocks and well core and also hydrocarbon (HC) fluids (rocks pyrolysis, mass-spectrometric and chrome-mass-spectrometric analyses, definition of reflecting capability of vitrinite, etc.), correlation of rock-rock, oil-rock, oil-oil.
- Development history and recent geological position of SCB caused appearing of unique oil and gas bearing basin which can be characterized by intensive going on up to now geodynamic and physico-chemical processes of matter transformation-redistribution, by active fluid dynamics and phase transitions. Due to it SCB is classified as unbalanced, metastable basin where necessarily to use new approaches in modeling of formation processes, migration and formation of hydrocarbons deposits and strategy development for their search.
- Significant fluctuations and definite cyclicity (cycle 1.2 ma) in ICC values changes and other geochemical parameters of OM in some studied outcrops of Maykop rocks (Khilmili, Gozluchai, Angekharan) can be explained by their location in marginal parts of Maykop Paleobasin.
- A definite differentiation of Neogene and Paleogene-Mesozoic deposits has been defined on isotopic composition of carbon (ICC) including OM. Carbon of OM of Neogene deposits is characterized by relatively heavier ICC compared with OM of Paleogene-Mesozoic rocks. The same situation can be observed in change of ICC oils of SCB different age reservoirs. It is typical for other world basins as well (Saint-Joakin, Mexican Gulf, West Siberia, etc) and it proves its global nature.
- It is defined Oligocene clays of G. Caucasus and Talysh are essentially differed on quantitative and qualitative characteristics of organic matter, its maturity, level of integral radioactivity and spectral composition of radioactive elements. On the base of abovementioned one can conclude of low perspectives of oil content in Pre-Talysh zone of sagging and adjacent Caspian water area.
- It is defined the increasing supply of Neogene rocks to process of oil generation in direction of deepseated part of basin. And Maykop deposits in this part of basin mainly generate light oil-condensate and gas providing the formation of gas-condensate-oil and gascondensate fields (Janub, Bakhar, Bulla-deniz, Shakh-deniz, Umid, Absheron).
- A wide deep range of HC generation (oils 5-9 km, gases 7-15 km) is revealed in SCB. HC gases consist of biochemical and thermocatalytic methane admixture.
- Mechanisms of primary and secondary oil migration are studied, two main phases of its migration are revealed in formation of oil field in PS of SCB and for the first time quantitative evaluation is given to far distance of subvertical migration of oil (3-4 km) and gas (7-8 km).
- Extensive research have been carried out on study of formation mechanism of anomalous (high and low) fluid pressures in sedimentary series of SCB and possibilities by seismic methods.
- Availability of supply sources for SCB structures from underlying deposits can be exemplified by Guneshli field on complex of thermobaric (gradients of pressures and temperatures), hydrochemical (mineralization of stratal waters), geochemical (sulphur content in oils, oils specific weight, isotopic composition of carbon, etc) parameters and it can support epigenetics of PS oils.
- Possibility of subduction geodynamic model of formation and distribution of SCB oil and gas fields in space has been found.
- Prediction of oil and gas content and phase condition of HC is give at large depths, and also their diagnostics by geophysical and geochemical methods.
- On the base of comparative analysis general and distinguishing peculiarities of Oil Systems and Mud volcanism of rivers basins Po (Italy) and South-Caspian (Azerbaijan).
During mud volcanism (MV) investigation:
- It is shown MV and HC pools are the derivatives of the whole process of oil and gas formation in sedimentary series.
- There is a comparative assessment of depth generation of liquid, hard and gaseous products of their activity: gases (10-15 km) are characterized by deeper depths and fluidizing clayey mass (up to 3-4 km) – by not deep ones; the oils are represented by alteration products of the fields.
- Genesis of isotopic - ultra heavy CO2 (> 5 %) has been revealed.
- More than 20 cycling HC components are revealed in MV gases; they are the features of generation by temperature 120-1500 C.
- First ideas of microbial communities and processes are got in channel of MV.
- For the first time breccia age is estimated on Dashgil mud volcano (4Ma) on the base of beryllium isotopes (Be9 and Be10).
- Comparative analysis of geological conditions, dimensional association and morphology of land and supposed Martian mud volcanoes has been carried out and on the base of this one can conclude mud volcanoes in land sedimentary basins can be analogues for giant test sites and hills with high reflecting ability in Martian lowland.
In field of geoecology:
- Such phenomena as sagging of surface its flooding and technogenic seismicity manifestation on area of long developed fields exemplified by Absheron Peninsula.
- Methane supply is estimated which eminates from mud volcanoes and affects global climate change.
- Collaborators of department research radon distribution on territory of Azerbaijan, reveal hazard zones for health of people and develop measures on minimization of radon hazard.
Since 1993 the collaborators of department within cooperation between Geology Institute of ANAS and foreign companies, International Research Centres of America: AMOCO, Exxon, Chevron, First Change APTI, ARCO companies, Universities of South Carolina and Utah; Europe: BP, Robertson, Geochem Group, Colin Jones ltd, Zasmomonument, Amerada Hess (UK), Beicip Franlab (France); Statoil (Norway); Wintershall and RWE (Germany); OMV (Austria); Marmara Research Center (Turkey); ZUK oil, Rosneft (Russia); and Asia: JNOC (Japan) actively worked in development of problem of oil and gas geology and geochemistry of the South Caspian oil and gas bearing province and adjacent areas.
Participation in Grant Programmes:
Department’s collaborators jointly with colleagues from different countries participate in fulfillment of 13 International and Republican grant programmes. Within Cariplo Foundation (Italy) the head of department A. A. Feizullayev was twice in academic trip (during 3 months) in Italy: Universities of Florence and Pavia; he was invited also to present scientific paper in Universities of Oklakhoma (USA), of Bologna (Italy), and also in Research Centre GFZ in Potsdam (Germany).
Preparation of Staff:
Over 20 years 10 Ph D defended their theses. Head of department A.A.Feizullayev is also a Professor of basic faculty in Azerbaijan State Oil Academy which formed at Geology Institute of ANAS. He is a supervisor for masters.
For period 2003-2013 about 155 scientific works (monographs, articles, brochures, education books, theses) were published. Among them 96 was published abroad. The department members present their papers in International and Republican Forums.
Change patterns of quantitative characteristics of
Maykop deposits organic matter in space of SCB western flank
Dependence between isotopic composition of carbon,
saturated hydrosolvents of organic matter and SCB oils