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MWD poised for future - conclusion. Measurement-while-drilling essential to drilling
229A 885214 Piezo-friction-cone penetrometer testing in soft clays. Note Konrad, J M Can Geotech J V24, N4, Nov 1987, P645-652
Most commercially available electric cones, designed for use in sands, seldom exceed 5% of design capacity in soft clays. The potential of these instruments in weak cohesive soils is examined. A test procedure to minimise zero shift errors is outlined. Interpretation of piezo-friction-cone penetrometer test data is discussed, with particular reference to pore pressure and skin friction distribution. 885215 Dilatomcters settle in Schertmann, J H Civ Engng, N Y V58, N3, March 1988, P68-70
Data from the Marchetti Dilatometer Test (DMT) can be interpreted to give information on soil type, in situ lateral stress, compression modulus, and overconsolidation ratio for all soils, excess pore pressure, undrained shear strength, and consolidation and permeability parameters for clays, and friction angle and pore pressure in sands. The instrument is quick and accurate in use. Case studies of the use of the DMT in foundation assessment, backfill examination and in situ stress measurement are described. 885216 Calibration chamber for cohesive soils An-Bin Huang; Holtz, R D; Charmeau, J L Geotech Test J VII. NI, March 1988, P30-35
A calibration chamber system and testing procedure have been developed for pressuremeter tests in cohesive soils. The system, comprising a slurry consolidometer, a double wall calibration chamber, model pressuremeters, and miniature piezometers, is described. Clay specimens prepared using the slurry and consolidation system were uniform and gave reproducible results. Duplicate model pressuremeter tests in normally consolidated kaolinite resulted in essentially identical expansion curves,and predicted lateral stresses similar to. those applied to the chamber specimen. 885217 Reservoir applications of dipmeter logs Delhomme, J P; Pilenko, T; Cheruvier, E; Cull, R J Pet Tech V40. N2, Feb 1988, P180-186
Dipmeter tools are used primarily to get values of structural dip, but dipmeter conductivity curves can be interpreted to show textural changes, thin shale beds and open fractures. Dipmeter logs are used in conjuction with other core and log data. Examples illustrate the use of dipmeter logs in interpreting permeability distribution, textural evaluation, and well to well correlation. 885218 MWD poised for future - 4. MWD aids vital drilling decisions Fontenot, J E; Rao, M V Oil Gas J V86, Nil, 14 March 1988, P60-65
When drilling in troublesome formations, Measurement While Drilling provides real time information on downhole conditions which can be used to evaluate the formation and alter parameters where required. Factors affecting the planning of troublesome wells and their possible causes, and benefits derived from MWD are tabulated. Applications to which MWD is particularly suited and the information required are discussed.
885219 MWD poised for future - conclusion. Measurement-whiledrilling essential to drilling Fontenot, J E; Rao, M V Oil Gas J V86, NI3, 28 March 1988, P52-58
Limitations of current MWD instrumentation in terms of hole size, temperature range, and data sampling and transmission rates are first examined. Future requirements for more quantitative formation evaluation, and drilling safety, efficiency and trouble avoidance are considered. The general trend of development of MWD is summarised. 45 refs. 885220 SPE 16666. Petrophysical-mechanical math model for realtime wellsite pore pressure/fracture gradient prediction Holbrook, P W; Hauck, M L Proc 1987 SPE Annual Technical Conference, Drilling, Dallas, Sept 27-30 1987 P163-171. Publ Richardson: SPE, 1987
The petrophysical-mechanical math model is the first practical method to determine pore pressure and fracture gradient from log-derived data. Rock porosity and relative shale volume are measured using traditional petrophysical techniques. Pore pressures are calculated from earth stresses, which are derived from the measured parameters. Examples are presented of the use of this technique on 17 wells in the Gulf of Mexico. 885221 Interpretation of CPTs and CPTUs. Part !: undrained penetration of saturated clays Battaglio, M; Bruzzi, D; Jamiolkowski, M; Lancellotta, g Proc 4th International Geotechnical Seminar, Field Instrumentation and in-situ Measurements, Singapore, 25-27 November 1986 P129-143. Publ Singapore: NTI, 1986
Electrical static cone penetrometers (CPT) and piezocones (CPTU) are cost effective tools for obtaining geotechnicai information. The use of these instruments in determining the soil profile, stress history, undrained strength and consolidation properties of cohesive deposits is discussed in detail, along with problems related to their reliability. 885222 Interpretation of CPTs and cirrUs. Part 2: drained penetration of sands Baldi, G; Bellotti, R; Ghionna, N; Jamiolkowski, M; Pasqualini, E Proc 4th International Geotechnical Seminar, Field Instrumentation and In-situ Measurements, Singapore, 25-27 November 1986 P143-156. Publ Singapore: NTI, 1986
The use of cone penetrometer tests (CPT) for the evaluation of design parameters of cohesionless sandy soils is discussed. Methods to evaluate relative density, angle of internal friction and deformation parameters from CPT results are presented, with reference to tests on Ticino and Hokksund sands in large calibration chambers. 885223 Soil exploration offshore Zuidberg, H M; Richards, A F; Geise, J M Proc 4th International Geotectmical Seminar, Field Instrumentation and ln-situ Measurements, Singapore, 25-27 November 1986 P3-11. Publ Singapore: NTI. 1986
Site investigation in depths of water over 30m is discussed. Drilling, downhole sampling, and in situ testing from drill ships or jack-up rigs are first described. Recent developments including an ambient gas pressure sampler, conductivity probe, seismic piezocone for measuring mechanical properties,
© 1988 Pergamon Press pie. Reproduction not permitted RMMS
25,5"--I
Most commercially available electric cones, designed for use in sands, seldom exceed 5% of design capacity in soft clays. The potential of these instruments in weak cohesive soils is examined. A test procedure to minimise zero shift errors is outlined. Interpretation of piezo-friction-cone penetrometer test data is discussed, with particular reference to pore pressure and skin friction distribution. 885215 Dilatomcters settle in Schertmann, J H Civ Engng, N Y V58, N3, March 1988, P68-70
Data from the Marchetti Dilatometer Test (DMT) can be interpreted to give information on soil type, in situ lateral stress, compression modulus, and overconsolidation ratio for all soils, excess pore pressure, undrained shear strength, and consolidation and permeability parameters for clays, and friction angle and pore pressure in sands. The instrument is quick and accurate in use. Case studies of the use of the DMT in foundation assessment, backfill examination and in situ stress measurement are described. 885216 Calibration chamber for cohesive soils An-Bin Huang; Holtz, R D; Charmeau, J L Geotech Test J VII. NI, March 1988, P30-35
A calibration chamber system and testing procedure have been developed for pressuremeter tests in cohesive soils. The system, comprising a slurry consolidometer, a double wall calibration chamber, model pressuremeters, and miniature piezometers, is described. Clay specimens prepared using the slurry and consolidation system were uniform and gave reproducible results. Duplicate model pressuremeter tests in normally consolidated kaolinite resulted in essentially identical expansion curves,and predicted lateral stresses similar to. those applied to the chamber specimen. 885217 Reservoir applications of dipmeter logs Delhomme, J P; Pilenko, T; Cheruvier, E; Cull, R J Pet Tech V40. N2, Feb 1988, P180-186
Dipmeter tools are used primarily to get values of structural dip, but dipmeter conductivity curves can be interpreted to show textural changes, thin shale beds and open fractures. Dipmeter logs are used in conjuction with other core and log data. Examples illustrate the use of dipmeter logs in interpreting permeability distribution, textural evaluation, and well to well correlation. 885218 MWD poised for future - 4. MWD aids vital drilling decisions Fontenot, J E; Rao, M V Oil Gas J V86, Nil, 14 March 1988, P60-65
When drilling in troublesome formations, Measurement While Drilling provides real time information on downhole conditions which can be used to evaluate the formation and alter parameters where required. Factors affecting the planning of troublesome wells and their possible causes, and benefits derived from MWD are tabulated. Applications to which MWD is particularly suited and the information required are discussed.
885219 MWD poised for future - conclusion. Measurement-whiledrilling essential to drilling Fontenot, J E; Rao, M V Oil Gas J V86, NI3, 28 March 1988, P52-58
Limitations of current MWD instrumentation in terms of hole size, temperature range, and data sampling and transmission rates are first examined. Future requirements for more quantitative formation evaluation, and drilling safety, efficiency and trouble avoidance are considered. The general trend of development of MWD is summarised. 45 refs. 885220 SPE 16666. Petrophysical-mechanical math model for realtime wellsite pore pressure/fracture gradient prediction Holbrook, P W; Hauck, M L Proc 1987 SPE Annual Technical Conference, Drilling, Dallas, Sept 27-30 1987 P163-171. Publ Richardson: SPE, 1987
The petrophysical-mechanical math model is the first practical method to determine pore pressure and fracture gradient from log-derived data. Rock porosity and relative shale volume are measured using traditional petrophysical techniques. Pore pressures are calculated from earth stresses, which are derived from the measured parameters. Examples are presented of the use of this technique on 17 wells in the Gulf of Mexico. 885221 Interpretation of CPTs and CPTUs. Part !: undrained penetration of saturated clays Battaglio, M; Bruzzi, D; Jamiolkowski, M; Lancellotta, g Proc 4th International Geotechnical Seminar, Field Instrumentation and in-situ Measurements, Singapore, 25-27 November 1986 P129-143. Publ Singapore: NTI, 1986
Electrical static cone penetrometers (CPT) and piezocones (CPTU) are cost effective tools for obtaining geotechnicai information. The use of these instruments in determining the soil profile, stress history, undrained strength and consolidation properties of cohesive deposits is discussed in detail, along with problems related to their reliability. 885222 Interpretation of CPTs and cirrUs. Part 2: drained penetration of sands Baldi, G; Bellotti, R; Ghionna, N; Jamiolkowski, M; Pasqualini, E Proc 4th International Geotechnical Seminar, Field Instrumentation and In-situ Measurements, Singapore, 25-27 November 1986 P143-156. Publ Singapore: NTI, 1986
The use of cone penetrometer tests (CPT) for the evaluation of design parameters of cohesionless sandy soils is discussed. Methods to evaluate relative density, angle of internal friction and deformation parameters from CPT results are presented, with reference to tests on Ticino and Hokksund sands in large calibration chambers. 885223 Soil exploration offshore Zuidberg, H M; Richards, A F; Geise, J M Proc 4th International Geotectmical Seminar, Field Instrumentation and ln-situ Measurements, Singapore, 25-27 November 1986 P3-11. Publ Singapore: NTI. 1986
Site investigation in depths of water over 30m is discussed. Drilling, downhole sampling, and in situ testing from drill ships or jack-up rigs are first described. Recent developments including an ambient gas pressure sampler, conductivity probe, seismic piezocone for measuring mechanical properties,
© 1988 Pergamon Press pie. Reproduction not permitted RMMS
25,5"--I