Formation of oil and gas reservoirs in deep water areas of the South Caspian Depression

Abstract

The aim of this article is the identification and characterization of complex factors acting simultaneously on forming large sized reservoirs in the deep South Caspian Basin, as well as the development of a model based on a combination of synchronous natural processes of the formation of hydrocarbon deposits. The article analyses reasons for high layer pressures in the hydrocarbon fields of the South Caspian Depression (SCD), impacting factors. The tectonic factor and density-barometric model can become the main criterion for selection of priority projects for exploration and site selection for drilling wells. Obtained results allow conducting effective studies of the exploration and development of oil and gas condensate fields in the SCD area. El objetivo de este artículo es la identificación y caracterización de los complejos factores que actúan en la formación de depósitos de gran tamaño en lo profundo de la cuenca al sur del Mar Caspio, al igual que el desarrollo de un modelo de formación de depósitos de hidrocarburos basado en la combinación de procesos naturales sincrónicos. Este artículo analiza las causas de la presión de las capas altas en los campos de hidrocarburos ubicados al sur de la depresión cáspica y sus factores de impacto. Además, se propone el componente tectónico y el modelo de densidad barométrico como los criterios más importantes para la selección de proyectos prioritarios de exploración y la escogencia de lugares para perforación de pozos. Los resultados obtenidos permiten realizar estudios de exploración y desarrollo en los campos de petróleo y gas condensado en el sur de la depresión cáspica.

Prospects for the oil and gas potential of the sedimentary strata of the South Caspian Basin according to paleotectonic and geodynamic criteria

“…More specifically, we may assume that the rheologically active mass that had formed the oldest layer of the fold have formed the Janub elevation as a result of being displaced by the action of compressive stresses from transversal bending. The likelihood that the structure has been formed by transversal bending is even greater because of its isometric shape (Gahramanov, 2017;Alizadeh et al, 2017;Gadirov et al, 2014).…”

“…Increase in the burial rates in the western SCD was related to the emergence of the general compression regime in the Upper Miocene. Within the part of SCD which had been subject to compressive stresses coming from the south, west and north, its influence on each of its structural element has been significantly changing, depending on thickness of a sedimentary layer, lithological composition, depth at which the basement was embedded and other factors (Gahramanov, 2017). This caused local elevations across the SCD, varying in shapes and sizes.…”

Investigating Sand Production Phenomena: An Appraisal of Past and Emerging Laboratory Experiments and Analytical Models

“…For this purpose, it is necessary to obtain intact rock samples from target reservoir formations. The depth of petroleum reservoirs varies greatly, ranging from a few meters below the ground surface to a depth beyond 7000 m [39,40] and sometimes is difficult to retrieve large-scale cores from the required depth. Given the difficulty in extracting sufficient quantities of undisturbed natural cores, it is common practice to improvise using synthetic (artificial) cores [3,[41][42][43][44].…”

Influence of geological evolution conditions on the oil and gas structures formation in Baku archipelago

“…По данным проведенных геологических исследований были изучены поро ды стратиграфических комплексов четвертичного периода и палеогена, которые участвуют в геологическом строении структур Аран дениз, Дашлы и Сабаиль [1,4,9,19,20].…”

“…В скважинах, пробуренных вдали от нарушений, нефтегазопрояв ления не отмечались.Осложненные грязевым вулканизмом структуры Аран дениз Дашлы и Са баиль расположены в центральной части Бакинского архипелага в антикли нальной тектонической зоне Хамамдаг Азизбеков. Как известно, Хамамдаг Азизбековская тектоническая зона находится в Алятской гряде юго восточного Гобустана и протягивается в море на более чем 50 км от Пирсаатского мыса[1, 3,14,19,20].…”