Showing papers in "Marine and Petroleum Geology in 2007"

TL;DR: In this article, the physical properties of mudstones vary greatly with increasing effective stress, clay mineralogy and fluid content, and the results suggest that the physical property of a particular type of mudstone varies greatly with the amount of effective stress applied.

TL;DR: Several laterally offset and aggradational sinuous submarine channels are contained within a 54-km long segment of the Benin-major Canyon as mentioned in this paper, and they are referred to as channel-forms (CFs), and are believed to be the axial parts of submarine channels preserved during overall channel floor aggradation.

TL;DR: The most detailed studies relating to sinuous channels in the subsurface originate from offshore west Africa, where channels typically occur within incisional (confined) slope-channel complexes and often represent the latter stages of channel complex fill as mentioned in this paper.

TL;DR: In this article, high-resolution 3D seismic data of several subsurface examples reveal significant differences in internal architecture and evolution of fluvial and deep-water sinuous channel systems, although there are many similarities in external morphologies of both systems.

TL;DR: In this article, the authors report field observations of an Upper Cretaceous submarine channel-levee complex within the Rosario Formation, Baja California, Mexico, which provide high-resolution data of lithofacies and ichnofacies distribution, and levee depositional thickness decay along transects perpendicular to the channel axis.

TL;DR: In this article, a simple three-dimensional model was used to predict the positions of secondary petroleum migration pathways in heterogeneous carrier beds in Bozhong sub-basin, Bohai Bay basin.

TL;DR: In this paper, a series of physical experiments in which solute-driven gravity currents were run through pre-formed sinuous channels containing mobile beds was performed, and the results of these experiments revealed sedimentation patterns characterised by accumulation zones downstream of bend apices and erosion zones at outer bends.

TL;DR: In this article, the anatomy and patterns of the most recent sinuous channel avulsions in the Amazon, Zaire, Indus and Bengal Fans, all located along passive continental margins and all fed by major river systems are discussed.

TL;DR: Several knickpoints have been identified along the present-day thalweg of a sinuous submarine channel-levee system (CLS) on the slope of the western Niger Delta using 3D seismic data as discussed by the authors.

TL;DR: In this article, an aeromagnetic map to Anomaly 22 reveals that a c. 50 km wide magnetic anomaly cuts across spreading anomalies 24A, 24B and 23 from the Voring Marginal High on the Norwegian margin to Traill O on the East Greenland coast.

TL;DR: In this article, the authors investigated the relationship between the relative grain sizes of coarse and fine-grained sediment in a basin-floor to base-of-slope Neoproterozoic rocks.

TL;DR: In this article, the authors employ a discrete-element technique to investigate the influence of mechanical stratigraphy on the transition from trishear to kink-band fault-propagation fold.

TL;DR: In this article, an integrated study of the South Gabon Margin (South Atlantic) based on reflection seismic and well data has been performed to quantify tectonic activity, and the most striking event in the margin evolution appears to be the anomalous extra subsidence during the early post-rift period characterized by high sedimentation rates, equivalent to one third of the syn-rift subsidence.

TL;DR: In this paper, the authors proposed a new model of secondary circulation within submarine channel bends, characterised by a reversal in the orientation of the secondary circulation cell relative to that found in meandering rivers.

TL;DR: In this paper, the authors examined the relationship between an extensive system of large downward-tapering conical sandstone intrusions to the pervasive polygonal fault network present within the surrounding encasing host mudstones.

TL;DR: In this article, the authors provided the first documented analysis of in situ stress and pore pressure fields in the sedimentary formations of the Cuu Long and Nam Con Son Basins, offshore Vietnam, based on data from petroleum exploration and production wells.

TL;DR: In this article, the first scientific drilling campaign in the permantly ice-covered central Arctic Ocean, a 430m thick sequence of upper Cretaceaous to Quaternary sediments has been drilled.

TL;DR: In this paper, the authors performed pyrolysis experiments on typical source rock and crude oil samples selected from the eastern Tarim basin, evaluated their kinetic parameters of gas generation and methane carbon isotopic fractionation, and extrapolated them to geological conditions.

TL;DR: In this paper, the porosity and permeability of the Putaohua Member sandstone of the Lower Cretaceous Yaojia Formation were investigated in the Weixing oilfield.

TL;DR: The Utsira Sand is located in basin-restricted seismic depocentres, east of and below prograding sandy units from the Shetland Platform area with Hutton Sands.

TL;DR: In this paper, the Eocene Nohut Tepe channel system of the Elazig Basin in eastern Turkey was used to investigate the seismic signature of Eocene scale outcrops of different style channel systems.

TL;DR: In this paper, a GC-MS analysis of residual oils extracted from samples of certain reservoir sandstones within the Heidrun Field, offshore Norway, reveal significant contrasts in the chemical maturity of the first and the last fractions recovered (as high as 0.69 versus 0.50 for the MPI-1 ratio, corresponding to 0.79% vs. 0.67% Rc).

TL;DR: The Melut Basin is a Meso-Cenozoic rift basin accompanied by the formation and development of the Central African Shear Zone (CASZ) on the pre-Cambrian crystalline and metomorphic basement of lower relief as mentioned in this paper.

TL;DR: In this article, a case study from the Ypresian basin in central-northern Tunisia is presented, which reveals a close concordance between Rock-Eval pyrolysis data and polycyclic biomarkers parameters such as hopanes and steranes.

TL;DR: The degree of ordering in the fine fraction of a mixed-layer illite/smectite (I/S) was investigated in this paper, where the content of the illite and the order of the ordering was investigated.

TL;DR: Carbonate crusts collected from an active methane seep site in the offshore Louisiana of Gulf of Mexico have δ C PDB 13 = - 49.16 ‰ to - 52.29 ‰, indicating that the crust formed as the result of bacterially catalyzed methane oxidation and sulfate reduction as mentioned in this paper.

TL;DR: In this paper, the authors show how differential subsidence acted as the ultimate control behind a range of processes leading to mounded stratigraphy in the UK North Sea during the Palaeocene.

TL;DR: In this paper, single-channel reflection and wide-angle ocean bottom seismometer (OBS) reflection/refraction profiles were taken on the central continental slope off Nova Scotia in a region of possible gas hydrate occurrence, as evidenced by recent identification of bottom simulating reflectors (BSRs).

TL;DR: The Limon back-arc basin can be subdivided into a northern and a southern sub-basin separated by the E-W trending Trans Isthmic Fault System as discussed by the authors.

TL;DR: In this article, biological markers indicate that the bitumen and movable oil came from two source rocks in the Cambrian and Middle/Upper Ordovician system, both of which belong to marine facies.