GEOPHYSICAL HISTORY OF PARENTIS OIL FIELD, FRANCE

Geophysics ◽  
1956 ◽  
Vol 21 (3) ◽  
pp. 815-827 ◽  
Author(s):  
Raoul Vajk ◽  
George Walton
Keyword(s):  
Cross Sections ◽  
Gravity Anomalies ◽  
Oil Field ◽  
Seismic Profiles ◽  
Contour Maps ◽  
History Of ◽  
Standard Oil Company ◽  
Aquitaine Basin ◽  
Surface Geology ◽  
Gravity Map

In 1951, the French Government granted an exclusive exploration permit to the Esso R.E.P. (a Standard Oil Company affiliate) over an area of 4,357,980 acres around Bordeaux in the northern part of the Aquitaine Basin, France. This area was investigated first by surface geology; then it was surveyed by the gravity meter. In checking the gravity anomalies by the reflection seismograph, a subsurface structure was found at Parentis in 1953, which was drilled in 1954, and was proved to be oil bearing. The Parentis oil field is the most important oil field, not only in France, but in all Europe outside the Iron Curtain. Gravity map, seismograph map, seismic profiles, telluric map and geological contour maps, and cross sections of the Parentis structure are presented.

REGIONAL GEOLOGY AND GEOPHYSICS OF THE ARK‐LA‐TEX AREA

Geophysics ◽  
1951 ◽  
Vol 16 (3) ◽  
pp. 401-415
Author(s):  
Carl L. Bryan
Keyword(s):  
Cross Sections ◽  
Gravity Anomalies ◽  
Contour Interval ◽  
East Texas Basin ◽  
The North ◽  
Regional Tectonic ◽  
History Of ◽  
Magnetic And Gravity Anomalies ◽  
Gravity Map ◽  
North Louisiana

The boundaries of the Ark‐La‐Tex area are arbitrarily defined and the exploration history of the area briefly reviewed. A Basal Upper Cretaceous structure map and two stratigraphic cross sections illustrate the regional tectonic movements contributing to the formation of the East Texas basin, the North Louisiana basin and the intervening Sabine Uplift. Exploration objectives and problems and the relation of magnetic and gravity anomalies and axes with regional geologic trends and structure are discussed. It is pointed out that the piercement dome type structure offers an almost untested field for further exploration. Illustrations include a vertical intensity magnetic map with contour interval of 100 gammas, a Bouguer gravity map with contour interval of 5 milligals and type seismograph records.

TORSION BALANCE STEP ANOMALIES IN NORTHERN TILLMAN COUNTY, OKLAHOMA

Geophysics ◽  
1945 ◽  
Vol 10 (4) ◽  
pp. 507-525
Author(s):  
K. Klaus
Keyword(s):  
Cross Sections ◽  
Torsion Balance ◽  
Second Derivative ◽  
Contour Maps ◽  
Probability Rating ◽  
Order Of Magnitude ◽  
Wichita Mountains ◽  
Gravity Map ◽  
High Degree ◽  
Quantitative Calculations

The results of a semi‐detailed areal torsion balance survey in Southwestern Oklahoma are shown by means of a gradient‐curvature map, a gravity map, two second derivative contour maps, and gravity and second derivative profiles. Detailed quantitative calculations were made of a number of geological cross sections, two of which are shown in Figs. 8 and 9. Fig. 9 represents the subsurface situation with the highest probability rating, since it combines a high degree of geological probability with the fact that it will reproduce the gravity and second derivative curves of Figs. 6 and 7 very closely. This interpretation embodies a fault with a throw of the order of magnitude of 10,000 feet. If this interpretation is substantially correct, it implies a thick sedimentary section in the down‐thrown block, which might be of great economic interest in prospecting for oil. A comparison of the gravity and second derivative data may be of interest to the geophysicist. The geologist may find the results of this survey interesting because of their possible bearing on the orogeny of the Wichita Mountains.

OIL AND GAS EXPLORATION IN ALABAMA, GEORGIA, AND FLORIDA

Geophysics ◽  
1953 ◽  
Vol 18 (2) ◽  
pp. 340-359 ◽  
Author(s):  
Robert B. Baum
Keyword(s):  
Cross Sections ◽  
Oil And Gas ◽  
Geophysical Methods ◽  
Oil Field ◽  
Oil Fields ◽  
Seismic Events ◽  
Oil And Gas Exploration ◽  
Contour Maps ◽  
Reflection Seismic ◽  
Southern Florida

The discovery of the Pollard oil field in southern Alabama early in 1952 sparked a campaign of leasing and exploration which spread quickly into Georgia and Florida. Three fields in southwestern Alabama and one in southern Florida account for all the oil production in the three states. Some aspects of the general geology and geophysics of the area, illustrated with maps, cross sections, and correlation charts, suggest the presence of geologic conditions favorable for the possible trapping and accumulation of oil and gas. Early seismograph exploration in much of the area was not effective, but in recent months the tempo of seismic activity has been accelerating, and improvements in instrumental and interpretive techniques are being achieved through current experimental work. The use of the various geophysical methods contributed to the discovery of the four oil fields located in the area. The structural traps indicated by the contour maps of the four fields are of the type sought by the reflection seismic method. Examples of representative reflection records indicate the presence of usable and correlatable seismic events. A seismic cross section prepared from data of this type shows the fault zone associated with the Pollard field. The existence of favorable geologic conditions in the southeastern states and the recent oil field successes at Pollard and South Carlton indicate the continuing of active development and exploration throughout the area.

scholarly journals Structural study of Nahr Umr Oil Field in Southern Iraq

2016 ◽  
Vol 6 (2) ◽  
pp. 27-46
Author(s):  
Manal Shakir Al-kubaisi ◽  
Aymen Adil Lazim
Keyword(s):  
Structural Analysis ◽  
Cross Sections ◽  
Oil Field ◽  
Arabian Plate ◽  
Fold Axis ◽  
Contour Maps ◽  
Tectonic Events ◽  
Left Limb ◽  
Regional Tectonic ◽  
The Right

Nahr Umr oil field is one of the important productive southern Iraqi oil fields. This studyfocuses on the type of fold and faults of the Nahr Umr oil field. A structural analysis(geometric and genetic analyses) performed to identify its type, origin and to find its relevanceto main regional tectonic events. The structural classifications employed well and geophysicaldata through using structure contour maps, cross sections, and seismic section.The structural analysis inferred that fold of Nahr Umr oil field classified as antiform, upright,non-plunge, gentle, supratenous, dome feature, and asymmetrical. The limbs are unequalwhereas the length of left limb shorter than the right limb and its dip is greater than right limb.In addition, the thickness of crest is less than the thickness of limbs. Pattern of faults classifiedas compound, parallel, conjugates and radial with graben structure and these faultsconcentrated on crest of fold. The fold axis is almost N-S at early cretaceous and then clearlyturns to NW-SE and this may due to counterclockwise rotation of Arabian plate. Geophysicalinterpretations and results of structural analysis stated that Nahr Umr oil field formed by threecombined forces which are tectonic movements, reactivated basement, and salt structures.

HISTORY OF THE IMOGENE OIL FIELD ATASCOSA COUNTY, TEXAS

Geophysics ◽  
1953 ◽  
Vol 18 (2) ◽  
pp. 360-370
Author(s):  
John W. Bolinger
Keyword(s):  
Oil Field ◽  
History Of ◽  
Surface Geology

The original lease block on the area which is now the Imogene Oil Field was taken as a result of the discovery in 1935 by surface geology of a large fault, upthrown to the southeast. A general reconnaissance reflection seismograph survey followed in 1940, preceding the drilling of the discovery well by about two years. A further detailed reflection seismograph survey was made after the discovery to outline the structure more accurately.

Natural recession of the eastern margin of the Leofnard salt in western Canada

Geophysics ◽  
1996 ◽  
Vol 61 (1) ◽  
pp. 222-231 ◽  
Author(s):  
Neil L. Anderson ◽  
R. James Brown ◽  
Dale A. Cederwall
Keyword(s):  
Rock Salt ◽  
Cross Sections ◽  
High Viscosity ◽  
Western Canada ◽  
Seismic Profiles ◽  
Active Dissolution ◽  
Contour Maps ◽  
The North ◽  
Salt Dissolution ◽  
Reservoir Facies

The Lloydminster area (T35-65, R15W3M-10W4M) of east‐central Alberta and west‐central Saskatchewan, Canada, is dissected by the north‐northwest trending updip active dissolution margin, of the Devonian Leofnard Member rock salt. West of this margin, up to 150 m of rock salt is preserved; updip and to the east, the salt has mostly been leached from the rock record. The margin is up to 40 km wide and characterized by extreme local variations in net salt thickness. The dissolution of the Leofnard rock salt in the Lloydminster area has resulted in the entrapment of significant hydrocarbon accumulation. Stratigraphic traps, for example, have formed where reservoir facies were either preferentially deposited or preserved in salt‐dissolution lows. Structural traps, in contrast, have formed where reservoir facies are draped across residual salt or collapse features. It has been estimated that three trillion barrels of oil (mostly of high viscosity and unrecoverable) are entrapped along the eastern dissolution margin of the Leofnard rock salt in western Canada. A record of the westward progression of the dissolutional edge of the Leofnard salt is locked in the stratigraphic column. This progression is recorded as localized interval thickening in areas where dissolution and deposition were contemporaneous. The horizontal positioning of these interval thicks as a function of their geologic age provides a time record for the positioning of the salt edge. To further explain the process of salt dissolution in the Lloydminster area, we present a suite of contour maps, geologic cross‐sections, and seismic profiles. These data depict the present‐day distribution of the Leofnard salt in the Lloydminster study area. They support the theses that: (1) the dissolution margin of the Leofnard rock salt originated along the Elk Point outcrop to the east of the study area during the pre‐Cretaceous; and (2) the margin receded into the northeastern part of the Lloydminster study area during earliest Cretaceous or pre‐Cretaceous time and migrated progressively thereafter into its current position. From the perspective of the explorationist, such information is important because it identifies prospective play areas with high potential for the formation of salt‐related stratigraphic traps and/or structural traps.

scholarly journals Comparison of Quantitative Morphology of Layered and Arbitrary Patterns: Contrary to Visual Perception, Binary Arbitrary Patterns Are Layered from a Structural Point of View

2021 ◽  
Vol 11 (14) ◽  
pp. 6300
Author(s):  
Igor Smolyar ◽  
Daniel Smolyar
Keyword(s):  
Boolean Function ◽  
Layer Structure ◽  
Central Element ◽  
Morphological Characteristics ◽  
Building Blocks ◽  
Point Of View ◽  
Living Systems ◽  
Seismic Profiles ◽  
Contour Maps ◽  
Anisotropic Layers

Patterns found among both living systems, such as fish scales, bones, and tree rings, and non-living systems, such as terrestrial and extraterrestrial dunes, microstructures of alloys, and geological seismic profiles, are comprised of anisotropic layers of different thicknesses and lengths. These layered patterns form a record of internal and external factors that regulate pattern formation in their various systems, making it potentially possible to recognize events in the formation history of these systems. In our previous work, we developed an empirical model (EM) of anisotropic layered patterns using an N-partite graph, denoted as G(N), and a Boolean function to formalize the layer structure. The concept of isotropic and anisotropic layers was presented and described in terms of the G(N) and Boolean function. The central element of the present work is the justification that arbitrary binary patterns are made up of such layers. It has been shown that within the frame of the proposed model, it is the isotropic and anisotropic layers themselves that are the building blocks of binary layered and arbitrary patterns; pixels play no role. This is why the EM can be used to describe the morphological characteristics of such patterns. We present the parameters disorder of layer structure, disorder of layer size, and pattern complexity to describe the degree of deviation of the structure and size of an arbitrary anisotropic pattern being studied from the structure and size of a layered isotropic analog. Experiments with arbitrary patterns, such as regular geometric figures, convex and concave polygons, contour maps, the shape of island coastlines, river meanders, historic texts, and artistic drawings are presented to illustrate the spectrum of problems that it may be possible to solve by applying the EM. The differences and similarities between the proposed and existing morphological characteristics of patterns has been discussed, as well as the pros and cons of the suggested method.

Streptococcus pluranimalium meningoencephalitis in a horse

2021 ◽  
pp. 104063872110234
Author(s):  
Dah-Jiun Fu ◽  
Akhilesh Ramachandran ◽  
Craig Miller
Keyword(s):  
Ribosomal Rna ◽  
Cross Sections ◽  
Nucleotide Sequencing ◽  
Formalin Fixed Paraffin ◽  
Quarter Horse ◽  
Formalin Fixed Paraffin Embedded ◽  
History Of ◽  
The Brain ◽  
Gram Positive Cocci ◽  
Formalin Fixed

A 3-y-old, female Quarter Horse with a history of acute neurologic signs was found dead and was submitted for postmortem examination. Areas of petechial and ecchymotic hemorrhage were present on cross-sections of the cerebrum, cerebellum, and brainstem. Histologic examination of the brain revealed severe, purulent meningoencephalitis and vasculitis with a myriad of intralesional gram-positive cocci. Streptococcus pluranimalium was identified from formalin-fixed, paraffin-embedded tissue obtained from sites with active lesions by PCR and nucleotide sequencing of bacterial 16S ribosomal RNA. S. pluranimalium should be considered as a cause of meningoencephalitis in a horse.

CHARMONIUM PRODUCTION IN Pb–Pb COLLISIONS AT ALICE: FROM SUPPRESSION TO REGENERATION?

2013 ◽  
Vol 28 (21) ◽  
pp. 1330018 ◽  
Author(s):  
ENRICO SCOMPARIN
Keyword(s):  
Phase Transition ◽  
Cross Sections ◽  
Short Review ◽  
Heavy Ion ◽  
Gluon Plasma ◽  
Alice Experiment ◽  
Model Calculations ◽  
Ion Collisions ◽  
Quark Production ◽  
History Of

Heavy quarkonium states are considered as one of the key observables for the study of the phase transition from a system made of hadrons towards a Quark–Gluon Plasma (QGP). In the last 25 years, experiments at CERN and Brookhaven have studied collisions of heavy ions looking for a suppression of charmonia/bottomonia, considered as a signature of the phase transition. After an introduction to the main concepts behind these studies and a short review of the SPS and RHIC results, I will describe the results obtained in Pb – Pb collisions by the ALICE experiment at the LHC. The ALICE findings will be critically compared to those of lower energy experiments, to CMS results, and to model calculations. The large cross-sections for heavy-quark production at LHC energies are expected to induce a novel production mechanism for charmonia in heavy-ion collisions, related to a recombination of [Formula: see text] pairs along the history of the collision and/or at hadronization. The occurrence of such a process at the LHC will be discussed. Finally, prospects for future measurements will be shortly addressed.

Sign in / Sign up

Export Citation Format

Share Document