Sedimentological, cyclostratigraphic analysis and reservoir characterization of Balakhany X Formation within the productive series Azeri Field on C01 well (Offshore Azerbaijan)

Download
2008
Binyatov, Elnur
The Azeri, Chirag, Gunashli (ACG) field is located offshore Azerbaijan. The reservoirs are multilayered sandstones forming traps within a major anticlinal structure. Proven crude oil reserves are estimated to contain 5.4 billion barrels of oil. In the past this area has been studied in regional detail but not at the reservoir scale with respect to the fluvio-deltaic sediments filling the northern shore of the ancient South Caspian Sea. The aim of this study is carried out the sedimentological, cyclostratigraphical analysis and reservoir characterization of Balakhany X Formation within the Productive Series which is considered to be one of the significant producing horizons. To be able to achieve this objective, a 30m thick section, which is mainly composed of siliciclastics, has been studied in detail on Balakhany X cores from C01 well Azeri field. In this study, detailed lithofacies analyses were performed and sandstone, mudstone, siltstone facies were recognized in the studied interval of the Balakhany X Formation. Litharenites and sublitharenites sandstones are the most abundant in the succession. Sedimentological analysis such as grain-size sphericity, provenance, XRD, SEM and grain surface texture were performed and their relationship with depositional environment were discussed. The grain size distribution of the samples along the succession shows distribution of fine to very fine sands. Sorting of sandstones ranges between moderately well to very well sorted. The provenance analysis of sandstones based on modal analysis of thin sections related to recycled orogen. According to interpretation of grain size parameters and grain surface textures analysis the main transporting agent of sands observed as wind, wave and river agents. High resolution cyclostratigraphy studies based on cm-m scaled cyclic occurrences of lithofacies along the measured section were performed. Milankovitch, sub-Milankovitch and millennial cycles were determined along the studied section. The petrophysical analysis revealed good to very good (18 to 24%) porosity and good permeability (10 to 538mD) in Balakhany X Formation. The porosity and permeability are affected by both textural and compositional controls. Grain size distribution along the reservoir section is fine to very fine sands. Influence of compaction was observed by the fractures and dissolutions on the sand grains. The calcite cement, grain-size variation, sorting and compaction are the main factors controlling porosity and permeability.

Suggestions

Geostatistical evaluation of well logs in reservoir charachterization in Azeri-Chirag-Guneshli field
Rzazade, Rahim; Karahanoğlu, Nurkan; Department of Geological Engineering (2013)
The Azeri-Chirag-Guneshli (ACG) field is situated offshore of Caspian Sea Azerbaijan sector. It is an elongated anticline in structure and the reservoir section consists of mainly sandstone. Recoverable reserves are calculated to be 5.4 bbl of oil (Binyatov 2008). Sedimentary environment corresponding to this region is mainly fluvio-deltaic. The main aim of this study is to obtain better understanding of two main prolific hydrocarbon reservoir Pereriv B and Pereriv D by integration of well logs and core dat...
Sedimentological and cyclostratigraphic analysis of upper part of the kartal formation (sw of Ankara)
Aghayev, Rufat; Yılmaz, İsmail Ömer; Department of Geological Engineering (2008)
The Montian Kartal Formation lies in the south-west of Ankara region and overlies the Upper Cretaceous Beyobasi Formation and is overlain by Thanetian Kırkkavak Formation conformably in the studied region (Kayabası village, NW of town of Haymana). A 283 m stratigraphic section, which is mainly composed of an alternation siliciclastic and carbonate rocks has been measured in the Kartal Formation within the Haymana-Polatlı basin. The aim of this study is to carry out the sedimentological and cyclostratigraphi...
Environmental effectiveness analysis of Caspian hydrocarbon development
Atay, Deniz; Ayata, Ayşe; Department of Eurasian Studies (2009)
Caspian region's hydrocarbon deposits constitute one of the significant reserves in the world. This has caused a competition among state and non-state actors in exploiting these resources since 19th century. After the Soviet demise, the newly independent states embraced the economic gains made possible with the existence of these reserves. However oil production may have negative implications on environment, ecological balance and biodiversity if carried out in an uncontrolled manner. This study aims to ide...
Mineralogic evidences of a mid-Paleozoic tectono-thermal event in the Zonguldak terrane, northwest Turkey: implications for the dynamics of some Gondwana-derived terranes during the closure of the Rheic Ocean
Bozkaya, Omer; YALÇIN, HÜSEYİN; Göncüoğlu, Mehmet Cemal (2012-04-01)
The Zonguldak terrane is a Gondwana-derived continental microplate along the Black Sea coast in northwest Anatolia. It includes a Cadomian basement, with oceanic-and island-arc sequences, unconformably overlain by siliciclastic rocks of Ordovician to Middle Silurian age. After a period of deformation and erosion, late Lower Devonian (Emsian) quartzites and shallow-marine limestones unconformably cover Middle Silurian (Wenlock) graptolitic shales. Along several cross sections across the unconformity plane, t...
Carbonate sedimentation in an extensional active margin: Cretaceous history of the Haymana region, Pontides
Okay, Aral; Altıner, Demir (Springer Science and Business Media LLC, 2016-10-01)
The Haymana region in Central Anatolia is located in the southern part of the Pontides close to the A degrees zmir-Ankara suture. During the Cretaceous, the region formed part of the south-facing active margin of the Eurasia. The area preserves a nearly complete record of the Cretaceous system. Shallow marine carbonates of earliest Cretaceous age are overlain by a 700-m-thick Cretaceous sequence, dominated by deep marine limestones. Three unconformity-bounded pelagic carbonate sequences of Berriasian, Albia...
Citation Formats
E. Binyatov, “Sedimentological, cyclostratigraphic analysis and reservoir characterization of Balakhany X Formation within the productive series Azeri Field on C01 well (Offshore Azerbaijan),” M.S. - Master of Science, Middle East Technical University, 2008.