Mapping of the West Yakut barrier reef in the junction zone of the Vilyui syneclise and Aldan anteclise using electro-facies analysis

2021 ◽  
pp. 40-48
Author(s):  
A. A. Kravchenko
Keyword(s):  
Facies Analysis ◽  
Fault Zones ◽  
Junction Zone ◽  
Barrier Reef ◽  
The West ◽  
Geoelectric Section ◽  
Drilling Data ◽  
Operational Information ◽  
Speed Up

The aim of the study was to test the method of electro-facies analysis for mapping reef structures in the conditions of the junction of the Vilyui syneclise and Aldan anteclise. The article presents the results of a study of geoelectric characteristics using the method of electro-facies analysis. The confinement of buried bioherms to fault zones has been established. Facies zones corresponding to paleographic representations of the development of the region were identified. A map of the distribution of electrofacies for the Cambrian section interval was constructed, with boundaries of the distribution of reef deposits in the aisles of the study area. A typical geoelectric section showing the geoelectric properties of a section of the West Yakut barrier reef is given. Separation of facies based on electrical exploration data is able to provide operational information on the boundaries of the studied area. With insufficient drilling data, electro-facies analysis can speed up the interpretation of electrical exploration data.

scholarly journals Marmara Island earthquakes, of 1265 and 1935; Turkey

2006 ◽  
Vol 6 (6) ◽  
pp. 999-1006 ◽  
Author(s):  
Y. Altınok ◽  
B. Alpar
Keyword(s):  
Fault Zones ◽  
Marmara Sea ◽  
Sea Waves ◽  
Rock Falls ◽  
The West ◽  
Moderate Size ◽  
Northwestern Turkey ◽  
Earthquake Ruptures ◽  
Fundamental Understanding

Abstract. The long-term seismicity of the Marmara Sea region in northwestern Turkey is relatively well-recorded. Some large and some of the smaller events are clearly associated with fault zones known to be seismically active, which have distinct morphological expressions and have generated damaging earthquakes before and later. Some less common and moderate size earthquakes have occurred in the vicinity of the Marmara Islands in the west Marmara Sea. This paper presents an extended summary of the most important earthquakes that have occurred in 1265 and 1935 and have since been known as the Marmara Island earthquakes. The informative data and the approaches used have therefore the potential of documenting earthquake ruptures of fault segments and may extend the records kept on earthquakes far before known history, rock falls and abnormal sea waves observed during these events, thus improving hazard evaluations and the fundamental understanding of the process of an earthquake.

SEARCH FOR HYDROCARBON ACCUMULATIONS IN POROUS FRACTURED RESERVOIRS USING THE PRONY TECHNOLOGY

2021 ◽  
pp. 74-87
Author(s):  
S. N. Smolin ◽  
◽  
G. M. Mitrofanov ◽  
◽  
◽  
...  
Keyword(s):  
Seismic Data ◽  
Fractured Reservoirs ◽  
Upper Jurassic ◽  
Deep Drilling ◽  
The West ◽  
Frequency Dependent ◽  
Sedimentary Deposits ◽  
Reflection Time ◽  
Drilling Data ◽  
Filtration Technology

The search for nonstructural hydrocarbon accumulations is a Herculean task that requires the use of delicate tools. Such tools include the Prony filtration technology. It allows for direct qualitative forecasting of hydrocarbon bearing features based on frequency-dependent analysis of the observed wave field of CDP reflection-time sections and includes four steps. The article shows capabilities of technology and specific examples of its application by correlation of frequency-dependent Prony images of wave fields with deep drilling data. The performed studies were carried out using CDP 2D seismic data and deep drilling data of 32 wells obtained in the territory of the West Siberian Plate, mainly for the Middle Jurassic (Late Bajocian-Bathonian, Malyshev horizon) interval of terrigenous-sedimentary deposits. At times, the underlaying and overlying Middle and Upper Jurassic deposits were captured. The manifestation forms of various oil and stratum water accumulations and their possible prospecting indicators, as well as signs of the absence of reservoirs are given. As an example, the manifestation and possible prospecting indicators of gas accumulation from a neighboring region within the West Siberian Plate are shown.

A calcareous foraminiferal faunule from the upper Albian Viking Formation of the Giroux Lake and Kaybob North fields, northwestern Alberta: implications for regional biostratigraphic correlation

2000 ◽  
Vol 37 (10) ◽  
pp. 1389-1410 ◽  
Author(s):  
C R Stelck ◽  
J A MacEachern ◽  
S G Pemberton
Keyword(s):  
British Columbia ◽  
Facies Analysis ◽  
The West ◽  
General Increase ◽  
Shallow Marine ◽  
Type Section ◽  
Peace River ◽  
Biostratigraphic Correlation ◽  
Alberta Basin ◽  
The Town

Arenaceous foraminifera from the upper Albian Viking Formation and associated strata are recorded and charted from five wells in the northwestern portion of the West Alberta Basin, viz. Gulf Giroux Lake 04-11-66-21W5, Candel Arco Giroux Lake 00/10-05-65-20W5, Pan Am B-1 Giroux 02/10-05-65-20W5, Calstan B.A. Kaybob W 02-28-63-20W5, and Chevron Fox Creek 10-15-62-19W5. An anomalous calcareous foraminiferal component in three Gulf Giroux Lake samples is illustrated. Ichnological, sedimentological, and stratigraphic studies of the Viking Formation strata, based on 26 cored intervals, indicate largely transgressive, shallow-marine deposition in the area. The microfaunal and ichnological assemblages indicate a general increase in salinity toward normal marine conditions. Facies analysis demonstrates the stacking of two shoreface parasequences, truncated by wave-ravinement surfaces. The calcareous foraminifera in the Viking Formation are associated with abundant and diverse arenaceous foraminifera, with arctic affinities that we have used for determining the microfaunal zone positions. Biostratigraphic correlation has been made with a calcareous faunule in the lower part of the Hasler Formation, within the expanded Fort St. John Group, found in the southern portion of the Keg River subbasin, Hudson Hope region, northeastern British Columbia. This helps to resolve the problem of correlating the stratigraphically equivalent Paddy Member at the type section near the town of Peace River, Alberta.

scholarly journals New data on age of the Neoproterozoic volcanic rocks of Isakovka Terrain from the Sayan-Yenisei accretion belt (U-Pb, zircon)

2019 ◽  
Vol 488 (5) ◽  
pp. 521-525
Author(s):  
P. S. Kozlov ◽  
I. I. Likhanov ◽  
K. S. Ivanov ◽  
A. D. Nozhkin ◽  
S. V. Zinoviev
Keyword(s):  
Oil And Gas ◽  
Volcanic Rocks ◽  
Island Arc ◽  
Yenisei Ridge ◽  
Junction Zone ◽  
The West ◽  
Late Precambrian ◽  
Unconventional Oil And Gas ◽  
Late Neoproterozoic ◽  
First Time

The Late Neoproterozoic U-Pb age for zircon of island-arc metadacites (691 8.8 million years) and basalts (572 6.5 million years) of the Kiselikhinskaya Formation of the Kutukasskaya Group was established for the first time. The manifestation of basaltic volcanism is associated with rift-related processes. The studies clarify the Late Precambrian stratigraphy of the Yenisei Ridge and the features of the evolution of the Sayan-Yenisei accretionary belt at the Neoproterozoic stage of its history. Folded-thrust structures of the junction zone of the Yenisei Ridge with the West Siberian Plate may be favorable in relation to the search for unconventional oil and gas traps.

Facies Analysis and Sequence Stratigraphy of the Qal'eh Dokhtar Formation (Middle-Upper Jurassic) in the West of Boshrouyeh, East Central Iran

2017 ◽  
Vol 91 (5) ◽  
pp. 1797-1819 ◽  
Author(s):  
Mahnaz SABBAGH BAJESTANI ◽  
Asadollah MAHBOUBI ◽  
Reza MOUSSAVI-HARAMI ◽  
Ihsan AL-AASM ◽  
Mehdi NADJAFI
Keyword(s):  
Sequence Stratigraphy ◽  
Facies Analysis ◽  
Upper Jurassic ◽  
Central Iran ◽  
The West ◽  
East Central

North Atlantic Council

1950 ◽  
Vol 4 (4) ◽  
pp. 694-697
Keyword(s):  
North Atlantic ◽  
The West ◽  
The North ◽  
Effective System ◽  
Speed Up ◽  
The North Atlantic ◽  
Defense Production ◽  
Economic Construction ◽  
North Atlantic Area ◽  
Atlantic Area

The first series of meetings of the Council of Deputies opened in London on July 25 under the chairmanship of Charles M. Spofford (United States). Upon adjournment of the Council on July 28 for discussion with members' respective governments, a statement was issued saying that “practical measures required to build up the defences of the west in the shortest possible time” had been discussed. The deputies unanimously agreed that the deterioration in the world situation created by the situation in Korea made it more important than ever for the North Atlantic Treaty states to speed up their common defense. They recognized “the need for maintaining and safeguarding the economic construction and stability of the North Atlantic area”, the communiqué continued, but agreed that this depended on establishment of an effective system of integrated defense. The deputies noted the additional effort already announced by several members of the treaty countries and unanimously approved certain recommendations to accelerate defense production, including a request for greater expenditures on defense.

Paleomagnetism of the Borden dykes of Baffin Island and its bearing on the Grenville Loop

1983 ◽  
Vol 20 (2) ◽  
pp. 275-289 ◽  
Author(s):  
K. W. Christie ◽  
W. F. Fahrig
Keyword(s):  
Pole Position ◽  
Fault Zones ◽  
Baffin Island ◽  
The West ◽  
Similar Position ◽  
Paleomagnetic Pole ◽  
Igneous Activity ◽  
Southern Extremity

Northern Baffin Island is intersected by spectacular swarms of predominantly northwesterly trending diabase dykes. Cross-cutting relationships, K–Ar ages, and paleomagnetic contact tests indicate that these dykes represent at least two major episodes of Hadrynian igneous activity. The Borden dykes were emplaced during the earlier of these episodes. They are about 950 Ma old and have a paleomagnetic pole position of 153.3°E, 26.7°S, δm = 8.6e, δp = 6.1°. The later episode saw the emplacement of the previously defined Franklin dykes, which are about 750 Ma old. The newly defined Borden pole lies at the southern extremity of the Grenville Loop and has an age consistent with poles of similar position that were derived from rocks of the Grenville Province.All of the dykes probably reflect tension acting in an east-northeast–west-southwest direction. The directions of thick northwest trending dykes, which form a considerable angle to that expected from east-northeast tension, are thought to have been controlled by earlier (circa 1200 Ma) fractures of the Borden fault zones. The two main surges of magma may coincide with two -periods of Hadrynian uplift in the Boothia Peninsula area to the west.

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