Showing papers in "Marine and Petroleum Geology in 2013"

TL;DR: In this article, eight black shale core samples were collected from a well drilled recently in the Chuandong Thrust Fold Belt, southwestern China, and their geochemistry and pore structures were investigated using low pressure N2 adsorption analysis and field emission scanning electron microscopy (FE-SEM) observations.

TL;DR: In this paper, a detailed description of rift-onset and breakup unconformities is presented for the three continental margins that evolved in the Early Cretaceous, the Paleocene and the Oligocene, respectively.

TL;DR: In this article, the authors compile published examples of induced earthquakes that have occurred since 1929 that have magnitudes equal to or greater than 1.0 and propose that this could occur by three mechanisms: hydraulic fluid or displaced pore fluid could enter the fault.

TL;DR: In this article, the authors compare three pairs of conjugate rifted margins that are often referred to as archetypes of rift systems and conclude that the distinct domains observed in the margin architecture represent distinct stages in the evolution of rifted margin, independently of their later evolution into magma-poor or magma rich environments.

TL;DR: In this paper, the porosity of seal rock samples from different depths within Brazilian geological formations was correlated to empirical models which predict the intrinsic permeability, and the results showed that the samples analyzed present a polymodal pore size distribution (PSD) and a total porosity ranging from 0.33 % to 10.44 %.

TL;DR: In this article, the authors adopt the most practical ways to subdivide the stratigraphic record, and take into account stratigraphraphic surfaces with physical attributes that may only be detectable at outcrop scale.

TL;DR: In this article, a detailed catalogue of bedding-parallel fibrous veins of fibrous minerals is presented, where the fibres are mutually parallel and have formed quasi-vertically.

TL;DR: The use of Lidar data for modeling petroleum reservoir analogues has become increasingly popular over the past few years, and there has been a proliferation of articles on the subject both on techniques and applications as mentioned in this paper.

TL;DR: In this article, the authors investigated the methane sorption capacities of the Sichuan Basin shales and found that they have a capacity between 0.94 and 4.29 cm3/g rock at STP.

TL;DR: In this paper, the concept of sequence stratigraphic units and bounding surfaces are defined based on the observation of stratal features and stacking patterns rather than the interpretation of the controlling mechanisms.

TL;DR: The Second Ulleung Basin Gas Hydrate Drilling Expedition (UBGH2) was conducted from 9 July to 30 September, 2010 in the East Sea, offshore Korea using the D/V Fugro Synergy as discussed by the authors.

TL;DR: In this paper, the sulfur isotopic composition of pore-water sulfate and sulfide minerals at three sites underlain by gas hydrates at the Blake Ridge was investigated.

TL;DR: In this paper, stable carbon and oxygen isotopes and Sr-87/Sr-86 ratios were applied to seep carbonates from Shenhu, SW Dongsha, and NE Dongsha on the northern continental slope of the South China Sea.

TL;DR: In this article, the authors combined interpretation of 3D seismic imagery of submarine sinuous channel belts in offshore West Africa with observations from a range of outcrop analogues, and recognized five main architectural elements of slope channel belts: lateral-accretion packages (LAPs), channel-bend mounds, levees, non-turbiditic mass-transport deposits (MTDs), and last-stage channel-fills.

TL;DR: In this article, the authors reviewed the abnormal characteristics of shale gas and discussed the cause of the anomalies and mechanisms for gas enrichment and depletion in high-maturity organic-rich shales.

TL;DR: In this paper, the authors examined the fractures in 42 shale-gas wells using several approaches, including a systematic examination and description of the cores and the casting of thin sections, a compilation of the statistics of fracture feature parameters, and observation of various analytical and test data, such as the mineral composition, the organic carbon contents, and the rock mechanics properties for specimens from the corresponding fractured intervals.

TL;DR: In this article, a 3D model for the Apennine foredeep with two evolutive stages is proposed, which is considered, for the large volume of qualitative and quantitative information, as a reference model for tectonically active foredeep basins dominated by basin-scale sand-rich turbidite systems.

TL;DR: In this paper, the authors present a general model for channel inception and evolution in the deep sea by integrating observations from two complementary datasets: (1) high-resolution multibeam bathymetry and chirp sub-bottom profiles of the Lucia Chica channel system on the seafloor offshore central California, and (2) the well-exposed channelized strata of the Tres Pasos Formation in southern Chile.

TL;DR: The Upper Cretaceous Mesaverde Group in the Piceance Basin, western Colorado, contains thick sections of low porosity, low permeability sandstones that are reservoirs for large accumulations of hydrocarbon gas as discussed by the authors.

TL;DR: The Tres Pasos Formation of southern Chile records a slope system characterized by >800m of paleo-bathymetric relief as discussed by the authors, which provides a unique opportunity for high-resolution analyses of channel stacking patterns and provide insight into the evolution of conduits that transport sediment from continents to the deep ocean.

TL;DR: In this article, a method is proposed to calculate the evolution of TOC, organic porosity and gas retention capacity through time in shale gas by means of petroleum system modeling, which is tested on a 3D basin model of the Mississippian Barnett Shale in Texas (USA).

TL;DR: In this article, a compilation, evaluation and correlation of published petrophysical datasets determined for 233 rock samples (165 mudrocks, 27 sandstone, 25 carbonate, 11 anhydrite and 5 marlstone datasets) is given.

TL;DR: The earliest direct evidence for terrestrial microbial mat development in siliciciclastic sediments comes from the 2.75-Ga (Palaeoproterozoic) fluviolacustrine sediments of the Hardey Formation of the Pilbara craton in Western Australia.

TL;DR: Wang et al. as discussed by the authors investigated a series of Late Miocene submarine canyons developed on the shelf margin in the Qiongdongnan Basin, northern South China Sea, which exhibit different morphological features and are characterized by unidirectional migration.

TL;DR: In this article, the authors proposed a new generalized theoretical model for porosity-depth relationship for both normally compacted and abnormally compacted formations, which leads to a new method for calculating effective stress and pore pressure in subsurface formations using porosity and compressional velocity.

TL;DR: In this article, the undrained shear strength of methane hydrate bearing sand was investigated and the relative contribution of cohesion and friction angle was observed to be a function of the hydrate saturation for this particular hydrate formation methodology.

TL;DR: In this article, a loga-rithmic relationship was found to give the best fit for methane d 13 C 1 and (1 � H2S/(1) ) for water intervals.

TL;DR: The Catoche Formation of the St. George Group in eastern Laurentia (western Newfoundland) consists of early Ordovician (Arenigian) shallow marine platform carbonates (∼160 m thick), which were extensively dolomitized during the course of their diagenetic history.

TL;DR: In this article, the authors used X-ray diffraction (XRD) analysis, total organic carbon (TOC) measurements, and porosity and permeability measurements to study the controlling factors of the fractures in the shale reservoirs, and to analyze the impact of the fracture on the shale reservoir properties and subsequent exploration and development.

TL;DR: Based on a detailed structural study performed on a reservoir surface analogue, a fracture permeability model for carbonate reservoirs is proposed in this paper, which involves four hierarchical systems, each one assumed to convey fluids exclusively to that of immediately higher order.