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Borehole gravity measurements in the Salton Sea Scientific Drilling Project well State 2–14
134A
893219 Borehole gravity measurements in the Saiton Sea Scientific Drilling Project well State 2-14 Kasameyer, P W; Hearst, J R J Geophys Res V93, NBll, Not, 1988, P13037-13045
893224 Convenient device for hemispherical projection plotting in rock mechanics: short communication Uromeihy, A int J Min Geoi Engng V6. N2, July 1988, P163-168
A borehole gravity survey was planned to help delineate regions of anomalously dense (and hot) sediments in the Salton Sea Geothermal Field. Results of the survey are presented. Uncorrected borehole gravimetric densities match values from gamma-gamma logs. Results are discussed with consideration of the thermal history of the SSGF.
A device to aid stereonet plotting has been devised in which the overlay paper is fixed and the stereonet rotated. The equipment comprises a perspex frame with a circular hole to contain removable stereonet discs. Use of the device is described and an example given.
893220 Logging horizontal wells: field practice for various techniques Spreux, A M; Louis, A; gocca, M J Pet Technol V40, NIO, Oct 1988, P1352-1353 New techniques for running logging tools have developed alongside the adoption of highly deviated and horizontal wells in the petroleum industry. In addition to the traditional wireline technique, which is limited to wells of deviation less than 65 deg, the measurement while drilling (MWD), information and measuring systems in horizontal wells (SIMPHOR), pumpdown stinger, and coiled tube methods are used. The various techniques are compared.
Presentation and interpretation of data See also: 893057
89322 I Statistical techniques applied to borehole geophysical data in gold exploration Urbanic, T I; Bailey, R C Geophys Prospect V36, NT, Oct 1988, P752-771 Geophysical methods will not directly detect minerals present in trace amounts, but allow delineation of associated alterations and structural features favourable to a particular element. Geophysical data (self potential, induced polarization, resistivity, gamma, temperature, and temperature gradient) and drill core from Ontario have been examined. Factor analysis allowed gold mineralizations to be identified, and a linear discriminant function constructed which selected the economically favourable zones from geophysical data alone with a success rate of 75%. 893222 Porosity from seismic data: a geostatistical approach Doyen, P M Geophysics V53, NIO, Oct 1988, P1263-1275 The co-kriging technique is used to estimate the areal distribution of porosity in a simulated reservoir model and in oil bearing channel sand of Alberta, Canada, from data from 3D seismic surveys. The geostatistical technique is seen to be more accurate than standard regression methods.
893223 Use of geostatistical methods for the survey of lateritic gravels (In French) Cougny, G lnt Assoc Engng Geol Bull N38, Oct 1988, P45-53 The occurence of laterite gravels was investigated using geostatistics. Atterberg limits and percentage fines were determined for 68 boreholes at a site near Katiola, Ivory Coast, and the results analysed statistically. The theory of regionalised variables is outlined and the method used to analyse the borehole data described.
893225 Fractal and geostatistical methods for modeling of a fracture network Chiles, J P Alath Geol V20, N6. Aug 1988, P631-654 Fracture data were collected for the Fanay-Augeres uranium mine set in granite for quantitative modelling of the fracture network. The data were studied using 2 models: a fractal model with a variable similarity dimension, and a geostatistical parent-daughter model with regionalised density, in which fractures are grouped in clusters or swarms. Development of the models is outlined. The fractal model is easy to fit and to simulate along a line, but 2-D and 3-D simulations are more difficult. The geostatistical model is more complex, but easy to simulate.even in 3-D.
893226 Generation of correlated properties in heterogeneous porous media King, P R: Smith, P J Math Geol V20, N7, Oct 1988, P863-877 A general mathematical formulation of correlated random fields appropriate to describing property values in heterogeneous porous media is described. The formulation is applied to the nearest neighbour model in one, two and three dimensions to show how model parameters can be related to rock property statistics. Practical aspects of evaluating the correlation function and integral length scale from laboratory data are demonstrated. The method is illustrated by use of field data.
Suggested testing methods and standards See also: 893492 893227 Determination of frictional properties of geotextiles. Technical note Dembicki, E; Alenowicz, J Geotext Geomem V6, N4, 1987, P307-314 Influence of some test conditions on measured frictional properties of geotextiles is discussed. Suggestions are made for shear box testing of reinforced earth and for pullout tests, and results of these tests presented. Standard tests developed in Poland for measuring frictional properties of geotextiles in the textile industry are described.
893228 Suggested methods for seismic testing within and between boreholes fat J Rock Mech Min Sci 1/25, N6, Dec 1988, P449-472 ISRM suggested method for seismic testing, divided into 3 sections. (1) Seismic testing within a borehole, in which travel times of P and S waves and distance from source to receiver are measured to determine elastic wave velocity in the borehole direction. Downhole and uphole methods may be used.
1989 Pergamon Press pie. Reproduction not permitted
893219 Borehole gravity measurements in the Saiton Sea Scientific Drilling Project well State 2-14 Kasameyer, P W; Hearst, J R J Geophys Res V93, NBll, Not, 1988, P13037-13045
893224 Convenient device for hemispherical projection plotting in rock mechanics: short communication Uromeihy, A int J Min Geoi Engng V6. N2, July 1988, P163-168
A borehole gravity survey was planned to help delineate regions of anomalously dense (and hot) sediments in the Salton Sea Geothermal Field. Results of the survey are presented. Uncorrected borehole gravimetric densities match values from gamma-gamma logs. Results are discussed with consideration of the thermal history of the SSGF.
A device to aid stereonet plotting has been devised in which the overlay paper is fixed and the stereonet rotated. The equipment comprises a perspex frame with a circular hole to contain removable stereonet discs. Use of the device is described and an example given.
893220 Logging horizontal wells: field practice for various techniques Spreux, A M; Louis, A; gocca, M J Pet Technol V40, NIO, Oct 1988, P1352-1353 New techniques for running logging tools have developed alongside the adoption of highly deviated and horizontal wells in the petroleum industry. In addition to the traditional wireline technique, which is limited to wells of deviation less than 65 deg, the measurement while drilling (MWD), information and measuring systems in horizontal wells (SIMPHOR), pumpdown stinger, and coiled tube methods are used. The various techniques are compared.
Presentation and interpretation of data See also: 893057
89322 I Statistical techniques applied to borehole geophysical data in gold exploration Urbanic, T I; Bailey, R C Geophys Prospect V36, NT, Oct 1988, P752-771 Geophysical methods will not directly detect minerals present in trace amounts, but allow delineation of associated alterations and structural features favourable to a particular element. Geophysical data (self potential, induced polarization, resistivity, gamma, temperature, and temperature gradient) and drill core from Ontario have been examined. Factor analysis allowed gold mineralizations to be identified, and a linear discriminant function constructed which selected the economically favourable zones from geophysical data alone with a success rate of 75%. 893222 Porosity from seismic data: a geostatistical approach Doyen, P M Geophysics V53, NIO, Oct 1988, P1263-1275 The co-kriging technique is used to estimate the areal distribution of porosity in a simulated reservoir model and in oil bearing channel sand of Alberta, Canada, from data from 3D seismic surveys. The geostatistical technique is seen to be more accurate than standard regression methods.
893223 Use of geostatistical methods for the survey of lateritic gravels (In French) Cougny, G lnt Assoc Engng Geol Bull N38, Oct 1988, P45-53 The occurence of laterite gravels was investigated using geostatistics. Atterberg limits and percentage fines were determined for 68 boreholes at a site near Katiola, Ivory Coast, and the results analysed statistically. The theory of regionalised variables is outlined and the method used to analyse the borehole data described.
893225 Fractal and geostatistical methods for modeling of a fracture network Chiles, J P Alath Geol V20, N6. Aug 1988, P631-654 Fracture data were collected for the Fanay-Augeres uranium mine set in granite for quantitative modelling of the fracture network. The data were studied using 2 models: a fractal model with a variable similarity dimension, and a geostatistical parent-daughter model with regionalised density, in which fractures are grouped in clusters or swarms. Development of the models is outlined. The fractal model is easy to fit and to simulate along a line, but 2-D and 3-D simulations are more difficult. The geostatistical model is more complex, but easy to simulate.even in 3-D.
893226 Generation of correlated properties in heterogeneous porous media King, P R: Smith, P J Math Geol V20, N7, Oct 1988, P863-877 A general mathematical formulation of correlated random fields appropriate to describing property values in heterogeneous porous media is described. The formulation is applied to the nearest neighbour model in one, two and three dimensions to show how model parameters can be related to rock property statistics. Practical aspects of evaluating the correlation function and integral length scale from laboratory data are demonstrated. The method is illustrated by use of field data.
Suggested testing methods and standards See also: 893492 893227 Determination of frictional properties of geotextiles. Technical note Dembicki, E; Alenowicz, J Geotext Geomem V6, N4, 1987, P307-314 Influence of some test conditions on measured frictional properties of geotextiles is discussed. Suggestions are made for shear box testing of reinforced earth and for pullout tests, and results of these tests presented. Standard tests developed in Poland for measuring frictional properties of geotextiles in the textile industry are described.
893228 Suggested methods for seismic testing within and between boreholes fat J Rock Mech Min Sci 1/25, N6, Dec 1988, P449-472 ISRM suggested method for seismic testing, divided into 3 sections. (1) Seismic testing within a borehole, in which travel times of P and S waves and distance from source to receiver are measured to determine elastic wave velocity in the borehole direction. Downhole and uphole methods may be used.
1989 Pergamon Press pie. Reproduction not permitted