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Engineering implications of the linear regression of geotechnical data
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884184 MWD poised for future - 3. MWD can improve well safety, control Fontenot, J E: Rao. M V Oil Gas J V86. N7. 15 Feb 1988. P40-47 The expansion of the scope of Measurement While Drilling (MWD) systems to the detection of overpressure zones is described. This may be achieved via resistivity, natural gamma, or formation density logs. Pore pressure models developed to improve the state-of-the-art of pore pressure detection are introduced. Well control with MWD, kick detection, downhole influx detection, and downhole sensors ae examined. Brief case studies are presented.
884185 SPE 16679. Three axis laser gyro system for borehole wireline surveying Gibbons. F L; Hense, U Proc 1987 SPE Annual Technical Conference, Drilling, Dallas, Sept 27-30 1987 P277-282. Publ Richardson: SPE. 1987 A 5 inch diameter high accuracy borehole surveying instrument using a full 3 axis inertial navigation system (INS) is described. The Ring-laser Inertial Guidance Surveyor (RIGS) incorporates a sophisticated mathematical model and reduces wireline measurement errors to less than I in 2000. It achieves accuracy close to that of a 10 inch INS tool, while offering a smaller diameter and continuous surveying capability.
884188 IMlatometer tests for design of grouted piles in rock Georgiadis, M; Michalopoulos, A P In: Use of In Situ Tests in Geotecimical Engineering (papers to the Conference, Blaeksb~g, 23-2J June 1986) P560-568. Publ New York: ASCE. 1986 ( ASCE Geotechnical Special Publication No 6) In situ testing of fractured mudstone in up to 21m of water was accomplished by dilatometer testing in boreholes drilled from a jack-up rig. Elastic moduli from these tests, plus results of comprehensive laboratory tests on rock cores, provided data for the design of drilled and grouted pile foundations for a quay wall. Evaluation of rock-grout shaft resistance, end bearing capacity and p-y curves is presented.
884189 Dilatometer tests in sand Lacasse, S; Lunne, T In: Use of In Situ Tests in Geotechnical Engineering (papers to the Conference, Blacksburg, 23-25 June 1986) P686-699. Publ New York: ASCE. 1986 (ASCE Geotechnical Special Publication No 6) Marchetti dilatometer tests carried out during the vibrocompaction of a 15m high sand deposit are reported. Results indicate that compaction was effective over at least 14m depth. Compaction resulted in increases in in situ horizontal stress, resistance to compression and effective friction angle. Constrained moduli from the dilatometer test and from screw plate tests and back calculation of settlement in silos are in good agreement.
Presentation and interpretation of data 884186 SPE 16987. New logging concept defines clay invasion while
drilling Boone, D E Proc 1987 SPE Annual Technical Conference, Drilling, Dallas, Sept 27-30 1987 P471-476. Publ Richardson." SPE. 1987 A computerised system has been developed which logs reservoir rocks at one foot intervals. Interpretative procedures have been developed to define porosity, pore pressure, gas saturation. reserves and permeability. Examples show that permeability to drilling fluids is a power function of porosity. Clay and drill solids penetrate porous sands to such an extent that current wireline porosity tools read low.
884187 Waterfront electric cone penetration testing Fuglevand. P F: Clough. H F; Faris, J R; Brigham. J E In: Use of In Situ Tests in Geotechnical Engineering (papers to the Conference, Blacksburg, 23-25 June 1986) P546-559. Publ New York: ASCE. 1986 (ASCE Geotechnical Special Publication No 6) Equipment and techniques for nearshore deployment of electric conepenetration testing (ECPT) in the USA are described. Depths of up to 76m were achieved in up to 18m of water, with cost savings compared to conventional borings. ECPT results were compared to site specific boring and laboratory data. From the limited data available, reasonable correlation was found between undrained shear strength and ECPT readings. ECPT data can be used to reliably estimate soil type.
See also. 884076 88419O Engineering implications of the linear regression of geotechnical data Morris, P H; Rynn, J M W; Williams, D J Trans last Engrs Aust Civ Engng VCE29, N4. Nov 1987, P239-247 Because of the random nature of geotechnical data, large differences may exist between calculated and true values of safety factors. Linear regression techniques are often used to evaluate relations between two dependent variables. A general solution to the regression equation, which takes into account the random nature of both variables, is available for correlated and uncorrelated errors. The implications of uncorrelated errors of the simplified regression analyses in use are examined with reference to coal tailings and earthquake data. Errors arising and their significance are considered.
Suggested testing methods and standards See also: 884030 884191 Quantity of fines produced during crushing, handling, and placement of roadway aggregates
Pintner, R M; Vinson, T S; Johnson, EG Geotech Test J VIO, N4, Dec 1987, PI65-172 A study aimed at development of laboratory techniques to simulate fines production during crushing, handling and placement of aggregates, and investigation of potential correlation between results of these tests and standard degradation test
~, 1988 Pergamon Press plc. Reproduction not permitted
884184 MWD poised for future - 3. MWD can improve well safety, control Fontenot, J E: Rao. M V Oil Gas J V86. N7. 15 Feb 1988. P40-47 The expansion of the scope of Measurement While Drilling (MWD) systems to the detection of overpressure zones is described. This may be achieved via resistivity, natural gamma, or formation density logs. Pore pressure models developed to improve the state-of-the-art of pore pressure detection are introduced. Well control with MWD, kick detection, downhole influx detection, and downhole sensors ae examined. Brief case studies are presented.
884185 SPE 16679. Three axis laser gyro system for borehole wireline surveying Gibbons. F L; Hense, U Proc 1987 SPE Annual Technical Conference, Drilling, Dallas, Sept 27-30 1987 P277-282. Publ Richardson: SPE. 1987 A 5 inch diameter high accuracy borehole surveying instrument using a full 3 axis inertial navigation system (INS) is described. The Ring-laser Inertial Guidance Surveyor (RIGS) incorporates a sophisticated mathematical model and reduces wireline measurement errors to less than I in 2000. It achieves accuracy close to that of a 10 inch INS tool, while offering a smaller diameter and continuous surveying capability.
884188 IMlatometer tests for design of grouted piles in rock Georgiadis, M; Michalopoulos, A P In: Use of In Situ Tests in Geotecimical Engineering (papers to the Conference, Blaeksb~g, 23-2J June 1986) P560-568. Publ New York: ASCE. 1986 ( ASCE Geotechnical Special Publication No 6) In situ testing of fractured mudstone in up to 21m of water was accomplished by dilatometer testing in boreholes drilled from a jack-up rig. Elastic moduli from these tests, plus results of comprehensive laboratory tests on rock cores, provided data for the design of drilled and grouted pile foundations for a quay wall. Evaluation of rock-grout shaft resistance, end bearing capacity and p-y curves is presented.
884189 Dilatometer tests in sand Lacasse, S; Lunne, T In: Use of In Situ Tests in Geotechnical Engineering (papers to the Conference, Blacksburg, 23-25 June 1986) P686-699. Publ New York: ASCE. 1986 (ASCE Geotechnical Special Publication No 6) Marchetti dilatometer tests carried out during the vibrocompaction of a 15m high sand deposit are reported. Results indicate that compaction was effective over at least 14m depth. Compaction resulted in increases in in situ horizontal stress, resistance to compression and effective friction angle. Constrained moduli from the dilatometer test and from screw plate tests and back calculation of settlement in silos are in good agreement.
Presentation and interpretation of data 884186 SPE 16987. New logging concept defines clay invasion while
drilling Boone, D E Proc 1987 SPE Annual Technical Conference, Drilling, Dallas, Sept 27-30 1987 P471-476. Publ Richardson." SPE. 1987 A computerised system has been developed which logs reservoir rocks at one foot intervals. Interpretative procedures have been developed to define porosity, pore pressure, gas saturation. reserves and permeability. Examples show that permeability to drilling fluids is a power function of porosity. Clay and drill solids penetrate porous sands to such an extent that current wireline porosity tools read low.
884187 Waterfront electric cone penetration testing Fuglevand. P F: Clough. H F; Faris, J R; Brigham. J E In: Use of In Situ Tests in Geotechnical Engineering (papers to the Conference, Blacksburg, 23-25 June 1986) P546-559. Publ New York: ASCE. 1986 (ASCE Geotechnical Special Publication No 6) Equipment and techniques for nearshore deployment of electric conepenetration testing (ECPT) in the USA are described. Depths of up to 76m were achieved in up to 18m of water, with cost savings compared to conventional borings. ECPT results were compared to site specific boring and laboratory data. From the limited data available, reasonable correlation was found between undrained shear strength and ECPT readings. ECPT data can be used to reliably estimate soil type.
See also. 884076 88419O Engineering implications of the linear regression of geotechnical data Morris, P H; Rynn, J M W; Williams, D J Trans last Engrs Aust Civ Engng VCE29, N4. Nov 1987, P239-247 Because of the random nature of geotechnical data, large differences may exist between calculated and true values of safety factors. Linear regression techniques are often used to evaluate relations between two dependent variables. A general solution to the regression equation, which takes into account the random nature of both variables, is available for correlated and uncorrelated errors. The implications of uncorrelated errors of the simplified regression analyses in use are examined with reference to coal tailings and earthquake data. Errors arising and their significance are considered.
Suggested testing methods and standards See also: 884030 884191 Quantity of fines produced during crushing, handling, and placement of roadway aggregates
Pintner, R M; Vinson, T S; Johnson, EG Geotech Test J VIO, N4, Dec 1987, PI65-172 A study aimed at development of laboratory techniques to simulate fines production during crushing, handling and placement of aggregates, and investigation of potential correlation between results of these tests and standard degradation test
~, 1988 Pergamon Press plc. Reproduction not permitted