Shallow gas and gas seepage: expressions on seismic and otheracoustic data from the Netherlands North Sea

2003 ◽  
Vol 78-79 ◽  
pp. 305-309 ◽  
Author(s):  
Barthold M. Schroot ◽  
Ruud T.E. Schüttenhelm
2003 ◽  
Vol 82 (1) ◽  
pp. 91-105 ◽  
Author(s):  
B.M. Schroot ◽  
R.T.E Schüttenhelm

AbstractSurface and sub-surface expressions of shallow gas in the Netherlands part of the southern North Sea are described, using standard E&P 2D and 3D seismic surveys, as well as higher frequency acoustic surveys. Surface expressions observed are pockmarks, which are geomorphologic features at the seabed indicative for venting of gas, and cemented sandstones. The subsurface expressions found comprise both phenomena indicating efficient trapping of gas in reservoir sands, such as shallow bright spots and flat spots, and phenomena, which are indications of migration or leakage to the seabed. We refer to the latter as ‘seismic anomalies indicating leakage’. These anomalies include gas chimneys or seismic chimneys. All chimneys found in the area have in common, that they belong to a seepage style, which is called ‘small and localised’. Much of this seepage is situated over salt domes, with the accompanying normal fault above the domes acting as pathways for the gas or fluids. Although there is admixture of biogenic gas, it is believed that many of the features observed relate to thermo-genic gas.


2004 ◽  
Vol 83 (4) ◽  
pp. 267-285 ◽  
Author(s):  
D.K. Munsterman ◽  
H. Brinkhuis

AbstractAn integrated stratigraphical analysis emphasizing organic-walled dinoflagellate cyst (dinocyst) distribution has been carried out on multiple boreholes penetrating the Miocene in the subsurface of the Netherlands (southern North Sea Basin). The bulk of the investigated successions is attributed to the Breda Formation, a regional lithostatigraphical unit most complete in the south-eastern part of the Netherlands. In concert with a first regional integrated bio (chrono) sequence-stratigraphical framework, fourteen informal dinocyst zones for the southern North Sea Miocene (SNSM), and three subzones are proposed for the Breda Formation. By also integrating (chrono)stratigraphic information from Mediterranean and North Atlantic dinocyst studies a first ever detailed age-model is here proposed for the Miocene in the subsurface of the Netherlands.


Geotectonics ◽  
2020 ◽  
Vol 54 (6) ◽  
pp. 807-820
Author(s):  
M. A. F. Miraj ◽  
A. Ali ◽  
N. Ahsan ◽  
Sh. Afgan ◽  
R. F. Saleem

2021 ◽  
pp. 39-82
Author(s):  
Arika Okrent ◽  
Sean O’Neill

This chapter tells the story of how English got to be the weird way it is, which begins with the Germanic languages and the barbarians who spoke them. During the 5th century, an assortment of them poured across the North Sea, from what is today Denmark, the Netherlands, and Northern Germany, and conquered most of England. After about a century of the Germanic tribes taking over and settling in, the Romans returned. This time it was not soldiers but missionaries who arrived. The monks who came to convert the island to Christianity brought their Latin language with them, and they also brought the Latin alphabet. They set about translating religious texts into the language of the people they encountered, a language that by this time had coalesced into something that was Old English. However, there is another group of barbarians to blame: the Vikings. Their language was similar enough to Old English that they could communicate with the Anglo-Saxons without too much difficulty, and over time their own way of speaking mixed into the surrounding language, leaving vocabulary and expressions behind that do not quite fit the rest of the pattern at the old Germanic layer.


2021 ◽  
pp. 305-310
Author(s):  
A. A. Budnikov ◽  
T. V. Malakhova ◽  
I. N. Ivanova ◽  
A. I. Murashova

2008 ◽  
Vol 70 (1) ◽  
pp. 47-56 ◽  
Author(s):  
Jost Borcherding ◽  
Carola Pickhardt ◽  
Hendrik V. Winter ◽  
J. Sabine Becker

2018 ◽  
Vol 91 ◽  
pp. 139-151 ◽  
Author(s):  
Simon Müller ◽  
Lutz Reinhardt ◽  
Dieter Franke ◽  
Christoph Gaedicke ◽  
Jutta Winsemann
Keyword(s):  

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