Time of Formation of Oil and Gas Pools in the South Caspian Region

Narimanov, A. A.

doi:10.1080/00206818609466251

Cited by 4 publications

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“…The value of the excess pressure of clays along the section is 400-500 kPaх10 2 . It increases to 550 kPх10 2 in well 59 in the Mishovdag area, in well 71 in the Kursangi area of the depression, and in well 3 in the Sangachal-deniz area of the Baku archipelago (Aliyev et al, 2011;2005).…”

Section: Resultsmentioning

confidence: 94%

“…It has been determined that the temperature of productive layers in oil and gas-bearing areas depends on the intensity of field development. Thus, when the solution is removed from the layer, the temperature of the layer increases (Narimanov, 2005). This leads to the release of heat due to the dissipation of energy in accordance with the movement of oil in the porous medium.…”

Section: Resultsmentioning

confidence: 99%

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Influence of geotemperature conditions on the oil and gas potential of the South Caspian depression (the case of the Lower Kura depression and Baku archipelago)

Nasibova,

Mukhtarova

2024

Journ. Geol., Geogr., and Geoec..

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In the article, the oil and gas potential of the deep-lying sediments of the Lower Received in revised form 13.08.2023; Kura depression and the Baku archipelago, which are geostructural elements of the South Accepted 13.11.2023 Caspian depression, are investigated according to the geotemperature conditions. The main aim of the research is identifying the oil-gas «windows» in the 22-24 km thick sedimentary rock complex of the South Caspian depression based on the geothermal factor. Using temperature values measured at different depth sections in different structures of the Lower Kura depression and Baku archipelago, temperature distribution maps of the area and a graph of changing temperature by depth were constructed. According to the geothermal maps constructed for the Lower Kura depression, a relatively high temperature value is observed in the north-west part of the area. This anomalous value is related to the location of active, periodically erupting mud volcanoes, which play an important role in temperature distribution, as well as local uplifts, which are more complicated by tectonic landslides and upthrusts. At great depths (5,500-6,500 m) within the research region, almost everywhere, anomalously high pore and reservoir pressures are observed, which create the conditions for the manifestation of tectonic-physical processes and the generation of great energy affecting the oil and gas potential of the area. In all the geotemperature maps constructed for different depth intervals in the Baku archipelago, high temperature values are observed in the north zone where the Sangachal-deniz-Duvanni-deniz-Khara-Zira island and Alat-deniz structures are located. This is due to the complication of uplifts by active mud volcanoes, which play an important role in the formation of local heat sources. The Khara-Zira island mud volcano, the largest in the Baku archipelago, is also located here. Based on the analysis of the temperature values in the research areas, a decrease in the temperature values is observed due to increase in the thickness and the clay content of the sedimentary layer in the direction from the Lower Kura depression to the South Caspian basin. The temperature is 990C at 5,000 m in the Lower Kura depression, 900C in the Baku archipelago. So, a decrease in temperature is characteristics for all depths. The analysis of the compiled graphs shows that the top of the main zone of oil formation in the Lower Kura depression starts at a depth of 2,000-2,500 m, and the lower limit is located at a depth of about 9,000 m (1500 C). The top of the main zone of oil formation in the Baku archipelago starts at a depth of 3,000 m, and the lower limit is located at a depth of 9,000-11,000 m. So, it shows that as the oil and gas formation sources the potential oil source rocks in the Lower Kura depression and the Baku archipelago at the depth range from 2,000-2,500 m to 8,000-11,000 m can produce industrially important oil and gas.

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Section: Resultsmentioning

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Influence of geotemperature conditions on the oil and gas potential of the South Caspian depression (the case of the Lower Kura depression and Baku archipelago)

Nasibova,

Mukhtarova

2024

Journ. Geol., Geogr., and Geoec..

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“…2). At the same time, Pontian (Miocene) sediments were observed in the section of some wells (Gurbanov, Narimanov, Nasiboba, 2021;Kerimov, Gasanov, Gurbanov, Abbasova, 2020;Narimanov, 2003;Gurbanov, Hаsаnоv, Narimanov, Sultanov, Ganbarova, 2017).…”

Section: Introductionmentioning

confidence: 87%

Analysis of structural-tectonic and petrophysical features of productive horizons of Mishovdag fold

Kаrimov,

Ganbarova,

Ismayilova

2023

Journ. Geol., Geogr., and Geoec..

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The article analyzes the geological structure, lithofascial, tectonic, and morpho- logical features of the Mishovdag oil field, which is a productive area in terms of oil content. Morphologically, it represents a brachianticlinal fold located in the north-west and south-east directions. The Mishovdag fold is located on the Kalamaddin-Bandovan anticline zone between the Kichik Harami (in the northeast) and Galmaz (in the northwest) structures. The Mishovdag-Galmaz part of the anticlinal zone extends in the sub-southern direction. The structures included in the zone are represented on the surface mainly by Aghjagil, Absheron, and ancient Khazar sediments. Productive layer sediments come to the surface in few areas. The tectonic movements and activity of mud volcanoes (active or buried) have left characteristic traces in the geological structure of the research area. Brachianticlinal and other types of structures were formed here. Under the strong influence of tectonic movements, the layers forming them were deformed and broken into blocks by regional tectonic faults. The anticlinal structures of the zone are complicated by longitudinal and latitudinal faults. The Mishovdag fold is represented by a brachianticline, 20-25 km long and 4-6 km wide. Brachianticline has a sharply asymmet- rical structure. The southwestern limb is steep, and inclined at an angle of 25-450, while the northeastern limb is flat and characterized by an inclination angle of 7-250. As a result of the analysis of the cross-sections of deep wells drilled in the field, it was determined that Mesozoic, Paleogene-Miocene, and Pliocene-Anthropogenic sediments are developed in the section of the fold. Sediments repre- senting the cross-section are characterized by high reservoir properties. Geological-geophysical works are carried out in the field. Core materials were taken from wells. The lithological-petrophysical characteristics – carbonate, porosity, and permeability of reservoir rocks have been determined according to core samples taken from exploration wells drilled in the field. The lithological-petrophysical characteristic regularities of change were investigated depending on depth.

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2001

Petroleum Geology of the South Caspian Basin

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Time of Formation of Oil and Gas Pools in the South Caspian Region

Cited by 4 publications

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Influence of geotemperature conditions on the oil and gas potential of the South Caspian depression (the case of the Lower Kura depression and Baku archipelago)

Influence of geotemperature conditions on the oil and gas potential of the South Caspian depression (the case of the Lower Kura depression and Baku archipelago)

Analysis of structural-tectonic and petrophysical features of productive horizons of Mishovdag fold

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