South Caspian Basin: Stratigraphy, Geochemistry and Risk Analysis

BHOS Repository

South Caspian Basin: Stratigraphy, Geochemistry and Risk Analysis

Show full item record

Title: South Caspian Basin: Stratigraphy, Geochemistry and Risk Analysis
Author: Lerche, Ian; Ali-zadeh, Akif; Guliyev, Ibrahim; Bagirov, Elchin; Nadirov, Rauf; Tagiyev, Mushfig; Feizullayev, Akper
Abstract: This book is the result of joint studies on the South Caspian Basin (SCB) of experts of Geology Institute of Azerbaijan National Academy of Sciences and South- Carolina University, USA. Some of these studies were issued earlier in monograph "Evolution of the South Caspian Basin: geologic risks and probable hazards". The book includes 8 chapters which examine such issues as tectonics and stratigraphy of the Mesozoic and Cenozoic deposits, isotopic-geochemical characteristics of organic matter, oil and gas, thermodynamical and hydrocarbon evolution across a seismic sections, dynamic modeling of mud flows offshore mud volcanoes, evolution and gas-charging of mud diapers and fault leakage, risk assessment of basin analysis results and gas hydrate hazards in the SCB. Mechanism of formation of hydrocarbon deposits in the main reservoir of the SCB - productive series -PS- (Lower Pliocene) is based in book according to source rocks-oil, oil-oil correlation. The description of gases of fields, mud volcanoes and gas-hydrates is given as well. There is shown that source thicknesses are Oligocene and Miocene rocks. Taking into account that SCB is extremely cool, oil generation window locates on the depth 6-9 km, and faults play a main role in the transportation and retention of oil and gas accumulation in PS. The rapid deposition of sediments (up to 1200 m/mln.yeras) since Pontian time (~5 MYBP) implies a massive overpressure ands as result a mud volcanoes and diapers build-up. A 3D mud flow model, called MOSED 3D, has been used to examine the mud flow problem. The Chirag oil field area in the Caspian Sea has been chosen to demonstrate application of the method. It is shown that massive sedimentation in the last 3 million years implies a continued growth of the diapir (which grows about 25-30 km in about 15 M.yars). The thermal influence of the diapir extends laterally, to about 2-4 diapir diameters into the surrounding sediments, while the diapir causes hydrocarbon flows anomalies and formation bed distortion out to about 6 diapir diameters. Probability and sensitivity analyses was applied to the results of 2D basin modeling of the SCB. Attention was focused on the behaviour of excess pressure, temperature, porosity and hydrocarbon accumulations. The book examines the potential hazards that can occur from hydrates for exploration rigs, production platforms and pipelines. Problems examines include hydrate formation zones, and explosive dissociation as a result of mud flows and/or uplift and rotation of submarine mud volcanoes.
URI: http://hdl.handle.net/123456789/1437
Date: 1997


Files in this item

Files Size Format View
SCB-stratigraph ... stry and risk analysis.pdf 1.350Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record

Search BHOS Repository


Advanced Search

Browse

My Account