GEOPHYSICAL ACTIVITY IN 1961

Geophysics ◽  
1962 ◽  
Vol 27 (6) ◽  
pp. 859-886
Author(s):  
Neal J. Smith
Keyword(s):  
Geophysical Methods ◽  
Free World ◽  
Geophysical Exploration ◽  
Ground Magnetic

Combined Petroleum Geophysical Activity.—Petroleum geophysical exploration in the Free World, consisting of seismic, gravity, ground magnetic, and other nonairborne geophysical methods, declined 3.1 percent, to 10,203 crew‐months in 1961 for a net loss of 323 crew‐months. This is 24 percent below the peak year of 1956. Airborne magnetometer activity was down from its high of 556,652 line‐miles in 1960 to 347,841 line‐miles, a drop of 37.5 percent.

GEOPHYSICAL ACTIVITY IN 1962

Geophysics ◽  
1963 ◽  
Vol 28 (6) ◽  
pp. 1049-1071
Author(s):  
Neal J. Smith
Keyword(s):  
Geophysical Methods ◽  
The Other ◽  
Free World ◽  
Geophysical Exploration ◽  
Other Hand ◽  
Ground Magnetic

Petroleum geophysical exploration in the Free World, consisting of seismic, gravity, ground magnetic, and other nonairborne geophysical methods, declined 10.0 percent over 1961. This is the sharpest in the continual series of declines that began in 1957 and amounts to a loss of 1,008 crew‐months; it is 32 percent down from the peak year of 1956. Airborne magnetometer activity, on the other hand, rose from 347,841 line‐miles in 1961 to 433,473, an increase of 25 percent.

GEOPHYSICAL ACTIVITY IN 1963

Geophysics ◽  
1964 ◽  
Vol 29 (6) ◽  
pp. 992-1014 ◽  
Author(s):  
Neal J. Smith
Keyword(s):  
Geophysical Methods ◽  
Free World ◽  
Geophysical Exploration ◽  
Ground Magnetic

Petroleum geophysical exploration in the Free World, consisting of seismic, gravity, ground magnetic, and other nonairborne geophysical methods, rose 1.6 percent in 1963 over 1962. This is in contrast to the 10 percent drop between 1961 and 1962. It is the first upswing since 1956 and, however modest, is welcome. It is 30 percent down from the 1956 level. Airborne magnetometer activity rose nominally from 433,473 line‐miles in 1962 to 434,943 in 1963.

EXPLORATION WORK IN MEXICO

Geophysics ◽  
1953 ◽  
Vol 18 (1) ◽  
pp. 188-200
Author(s):  
Antonio Garcia Rojas
Keyword(s):  
United States ◽  
Gulf Coast ◽  
Geophysical Methods ◽  
The United States ◽  
Oil Fields ◽  
Present Level ◽  
Geophysical Exploration ◽  
Petroleos Mexicanos ◽  
The Difference

Since 1940 Mexico has increased exploration work in search of new oil fields. Most of the exploration has been done in the Gulf Coast area where all existing Mexican oil fields are located. A brief résumé is given of the main problems of the different provinces under exploration and a list of the fields discovered by Petróleos Mexicanos in the different provinces of the country. Geophysical methods have been responsible for location of a very large percent of the new fields. To compare the intensity of exploration in the United States and Mexico, the amount of seismic and gravity‐meter work and of wildcat drilling per million barrels of production is given for both countries. The data shows that Mexico’s level of geophysical exploration, per million barrels of oil produced, is very close to that of the United States. A very marked increase in the intensity of exploration is shown for both countries. Wildcat drilling in Mexico has been less intensive than in the United States but shows a definite tendency to increase; its present level is very close to that of the United States during 1940. The writer is of the opinion that the difference in intensity of wildcat drilling shown in the data presented is actually smaller than appears as there is a certain amount of duplication in the United States because of leaseholding problems.

GEOPHYSICAL EXPLORATION FOR STRATIGRAPHIC OIL TRAPS

Geophysics ◽  
1943 ◽  
Vol 8 (4) ◽  
pp. 337-347
Author(s):  
Joseph L. Adler
Keyword(s):  
Geophysical Methods ◽  
Geophysical Exploration ◽  
Different Types

Stratigraphic traps are defined and classified and the applicability of various geophysical methods for the discovery of each of the different types of stratigraphic traps is discussed. Some undeveloped techniques are suggested in this connection as subjects for research.

Geophysical Activity in 1980

Geophysics ◽  
1981 ◽  
Vol 46 (9) ◽  
pp. 1316-1333 ◽  
Author(s):  
Russell J. Senti
Keyword(s):  
Statistical Data ◽  
Geophysical Methods ◽  
Groundwater Exploration ◽  
Original Form ◽  
Government Agencies ◽  
Free World ◽  
Alternate Form ◽  
Geophysical Techniques ◽  
General Response ◽  
Survey Questionnaires

Statistical data on geophysical activity in 1980 are gathered from two survey questionnaires mailed to more than 500 companies, contractors, government agencies, and institutions throughout the free world. One questionnaire was the original form which was designed primarily for reporting petroleum activities, and the other, an alternate form, was designed to facilitate reporting of nonpetroleum geophysical activities. We have attempted to gather data from all users of geophysical techniques in the areas of petroleum, mining, geothermal, and groundwater exploration and from those who employ geophysical methods in engineering, oceanography, and research. In general, response to the survey was good. However, we feel that there are new users of geophysical methods we are not reaching. If you did not receive our 1980 questionnaires, please let me know so we can include you on our mailing list for 1981. (As always, data submitted by individual organizations are held strictly confidential.)

Magnetic survey – ground technology, aeromagnetic survey on aircraft and unmanned aerial vehicles: a comparative analysis of the results (on the example of Eastern Transbaikalia)

2020 ◽  
Vol 26 (8) ◽  
pp. 6-15
Author(s):  
R. Gruzdev ◽  
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Geophysical Methods ◽  
Work Productivity ◽  
Field Work ◽  
Magnetic Survey ◽  
Aeromagnetic Survey ◽  
Aerial Vehicles ◽  
Eastern Transbaikalia ◽  
Actual Material ◽  
Ground Magnetic

The use of unmanned aerial vehicles (UAVs) in geophysical work is becoming a very popular area in the field of modern geological exploration. The advantage of unmanned systems is the optimal ratio of the quality of research results with a significant increase in work productivity and a decrease in cost. In this regard, the improvement of field techniques and the processing of UAV materials is of particular interest for exploration. On the subject, there are a number of unresolved issues that have been revealed to some extent as a result of the author’s comparison of ground-based magnetic exploration and aeromagnetic survey data. The purpose of the study was to assess the possibility of a full-fledged replacement of ground magnetic exploration work for aeromagnetic survey using unmanned aerial vehicles. The comparison of different types of magnetic survey is relevant, since on the basis of the actual material, the possibility of using an alternative more productive method – aeromagnetic survey using modern UAVs – instead of traditional expensive ground-based magnetic exploration works is analyzed. To compare the results of the studies, actual material obtained from field work on an area of 13,4 km2 was used. Based on the databases, maps of anomalous magnetic field and graphs on several geophysical profiles are built. Results of magnetic survey in air and ground versions are analyzed; correlation relationships between data of ground pedestrian magnetic survey and aeromagnetic system on An-3 and UAV aircraft are established. Based on the results of the study, correlation and determination coefficients were obtained, which indicate that geophysical methods on UAVs adequately occupy their place between classical aerogeophysics and ground-based pedestrian survey. Moreover, aeromagnetic survey using UAVs is able to replace pedestrian magnetic exploration during work at the same heights. Based on the results of the study, methodological recommendations for the production of aeromagnetic survey on UAVs were compiled

GEOPHYSICAL EXPLORATION FOR LIMESTONE REEFS

Geophysics ◽  
1949 ◽  
Vol 14 (4) ◽  
pp. 486-500
Author(s):  
F. J. Agnich
Keyword(s):  
Seismic Data ◽  
Geophysical Methods ◽  
Geophysical Exploration ◽  
Isopach Maps ◽  
Velocity Variations

Various geophysical methods are discussed in relation to their possible value in locating limestone reefs, with special emphasis on the gravity meter and seismograph. The effects of possible velocity variations through reefs on reflections from below a reef body are examined. Relationships between the shallow and deep horizons indicate that time isopach maps of such seismic data extremely valuable. A suggested exploration procedure describes several detailing methods, and emphasizes the important role of the interpreter in solving the problems associated with exploration for limestone reefs.

scholarly journals Application of electrical Tomography for the hydrogeological study of the Fez-Taza corridor, Case of Bir Tam-Tam(Morocco)

2021 ◽  
Vol 298 ◽  
pp. 05003
Author(s):  
Hassnae Faiz ◽  
Anasse Benslimane ◽  
Mohamed Chibout ◽  
Mohamed El Mokhtar ◽  
Fatima Zahra Faqihi ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Resources ◽  
Geophysical Methods ◽  
Dolomitic Limestone ◽  
Geological Data ◽  
Electrical Tomography ◽  
Geophysical Exploration ◽  
Hydrogeological Study ◽  
Drilling Data ◽  
Agricultural Areas

The present work contributes to the multidisciplinary geological, hydrogeological, and geophysical exploration of groundwater in the Bir Tam-Tam region of the Fez-Taza corridor. Our main objective is to release water resources in our study area to supply drinking water in the region and irrigation of agricultural areas. Potential zones are located at the Lias fracturing zones. This study is interested in understanding the hydrogeological context of the study area through geophysical methods such as Electrical Tomography. The comparison of geological data, Drilling data, and the interpretation of the results of electrical Tomography have made it possible to highlight the geoelectric levels likely to constitute a potential aquifer and to locate possible structural accidents (faults) affecting the dolomitic limestone formations of Lias that could drain groundwater.

THE FUTURE OF GEOPHYSICS

Geophysics ◽  
1955 ◽  
Vol 20 (3) ◽  
pp. 503-515
Author(s):  
Paul L. Lyons
Keyword(s):  
United States ◽  
Geophysical Methods ◽  
Complete Information ◽  
The United States ◽  
Important Place ◽  
World Petroleum ◽  
Geophysical Exploration ◽  
Upper Limit ◽  
The World ◽  
New Phase

The year 1955 marks a continued decline in exploration for oil in the United States and in the world as judged from the employment of seismograph parties. The decline indicates that in the United States we have passed an upper limit of action within the framework of exploration practices as they have existed. The precipitate rise of geophysical exploration was due to the effort of exploration companies to be “firstest with the mostest.” The rapid coverage of prospective oil areas in the United States and in world, however, has not resulted in a complete exploration of the sedimentary areas. Many areas may be considered virtually unexplored. In addition, frontiers exist in the search for very‐small‐relief structures and stratigraphic traps by geophysical methods. Application of improved instruments, techniques, and interpretations to these problems will result in a new phase of sustained exploration with successes going to those with the most complete information and the best ideas. A changing geophysics will occupy an important place in the world petroleum economy, with at least 450 billion barrels of oil yet to be found.

Geophysical Activity in 1978

Geophysics ◽  
1979 ◽  
Vol 44 (10) ◽  
pp. 1740-1754 ◽  
Author(s):  
M. G. Whitmire
Keyword(s):  
Acquisition Cost ◽  
Geophysical Methods ◽  
Groundwater Exploration ◽  
Cost Data ◽  
Government Agencies ◽  
Free World ◽  
Research Information ◽  
Geophysical Surveys ◽  
Geophysical Techniques

This report presents statiscal data on worldwide geophysical activity in 1978. These data were compiled from survey questionaires that were completed by more than 500 companies, contractors, government agencies, and institutions located throughout the free world. We have attempted to gather information from users of geophysical techniques in the areas of petroleum, mining, geothermal, and groundwater exploration; and from those who employ geophysical methods in engineering, oceanography, and research. Information was gathered on airborne, drilled hole, land, and marine geophysical surveys. Statistics were compiled on miles of coverage and acquisition cost. Data not supplied on the questionnaires for cost and line‐miles were estimated on the basis of massive statistical averages for the area and technique reported. This process is necessary to avoid distortion of individual statistical items.

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