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Rock strength from log parameters

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Proceedings Papers

Paper presented at the ISRM International Symposium - 10th Asian Rock Mechanics Symposium, October 29–November 3, 2018
Paper Number: ISRM-ARMS10-2018-057
.... The parameters assessed from the discontinuity logs are used for calculation of Rock Mass Rating (RMR) and Q-value based on Bieniawski (1989) and Barton et al. (1974), respectively. GSI is also computed using the above-mentioned parameters based on the equation proposed by Cai et al. (2007). Hoek-Brown strength...
Proceedings Papers

Paper presented at the SPE Conference at Oman Petroleum & Energy Show, March 21–23, 2022
Paper Number: SPE-200217-MS
... for many standard geomechanical models, rock strength parameter is routinely measured on rock samples using triaxial/uniaxial tests. This parameter is traditionally named as Uniaxial Compressive Strength (UCS) measured during the axial loading and crushing of cylindrical "core plugs" extracted from cores...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-036
... Intelligence correlation rock strength machine learning well logging strength log analysis Upstream Oil & Gas prediction porosity reservoir geomechanics neural network input parameter drilling data compressive strength sonic travel time uniaxial compressive strength travel time artificial...
Proceedings Papers

Paper presented at the SPE Nigeria Annual International Conference and Exhibition, August 2–4, 2021
Paper Number: SPE-207111-MS
... and accurately determine the strength of the rock in order to avoid these common drilling problems which are mostly encountered during well operations. It is of paramount importance to determine uniaxial compressive strength (UCS) from core and sonic log data so as to accurately predict rock strength for better...
Proceedings Papers

Paper presented at the Latin American & Caribbean Petroleum Engineering Conference, April 15–18, 2007
Paper Number: SPE-106573-MS
... strength has been provided to give valuable information for drilling purposes. Rock strength calculations The rock mechanical parameter that is most important when conducting drilling analysis is unconfined compressive rock strength (UCS) 1 . The UCS can be determined from Mohr Coulomb failure...
Proceedings Papers

Paper presented at the 56th U.S. Rock Mechanics/Geomechanics Symposium, June 26–29, 2022
Paper Number: ARMA-2022-0135
... the machine learning model to predict ROP, where the rock strength is neglected. Physically, ROP during drilling is greatly affected by CCS of the rock (Caicedo et al., 2005). Therefore, rock strength, which is of most interest, could be inferred from ROP together with other drilling parameters. In order...
Proceedings Papers

Paper presented at the SPE Russian Petroleum Technology Conference, October 26–29, 2020
Paper Number: SPE-201984-MS
... . Table 3 The correlation reliability coefficients R 2 for the geomechanical model parameters Parameter R 2 Log-based model R 2 CST-based model Tensile Strength (Brazilian method) 0.49 0.65 Cohesion Strength (carbonates rocks) 0.83 0.81 Cohesion Strength (terrigenous rocks...
Proceedings Papers

Paper presented at the International Geomechanics Symposium, November 7–10, 2022
Paper Number: ARMA-IGS-2022-024
... compressive strength method santarelli cuttings experiment engineering wellbore design reservoir characterization southwest petroleum university obtaining formation rock mechanical parameter compression sandstone cuttings experiment conform International Geomechanics Symposium IGS 2022 24...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0137
... is greatly affected by the magnitude of the rock strength parameters thus it should be involved in wellbore stability investigation. Determination of the degree of anisotropy can be measured by several approaches, one of which is using elastic waves. In this study, the compressive strength of the rocks from...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-0268
... parameters. The conversion relationship between static and dynamic modulus of carbonate cores from Block S is obtained by laboratory experiments. That is: 0.458 10.7s dE E (10) Where, sE is the static elastic modulus. For the deep carbonate rocks with high strength and elastic brittleness, the deformation...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 11–14, 2019
Paper Number: SPE-197537-MS
... the differential pressure as measure of the "cutting force". A strength parameter S derived from drilling data In a simplified picture for drilling the drill bit acts as a rotating cutter. The process of crushing the rock in front of the bit connects the "crushing power" (controlled by WOB) with the rate...
Proceedings Papers

Paper presented at the SPE Annual Technical Conference and Exhibition, October 5–8, 1986
Paper Number: SPE-15645-MS
... Compressive Strenath From Lo< Parameters This paper presents a method for estimation of uniaxial compressive strength which is based on correlating several log parameters with measured strength data from the same field. DESCRIPTION OF METHOD The rock strength can be related to frictional and cohesional...
Proceedings Papers

Paper presented at the SPE Annual Caspian Technical Conference, October 5–7, 2021
Paper Number: SPE-207030-MS
...), and rock failure parameters. Once Mechanical Earth Model (MEM) is established, dynamic logging data and core static data are correlated to produce key rock mechanics elements that are field and formation specific. The correlations include Young's Modulus, Poisson's Ratio, Unconfined Compressive Strength...
Proceedings Papers

Paper presented at the SPWLA 63rd Annual Logging Symposium, June 11–15, 2022
Paper Number: SPWLA-2022-0039
... parameter application hardness rd annual logging symposium SPWLA 63rd Annual Logging Symposium, June 10-15, 2022 DOI: 10.30632/SPWLA-2022-0039 AN INNOVATIVE AND RELIABLE METHOD OF ESTIMATING ROCK STRENGTH FROM DRILLING DATA ACQUIRED DOWNHOLE Umesh Prasad, William Anthony Moss, David Gavia, Hatem...
Proceedings Papers

Paper presented at the SEG International Exposition and Annual Meeting, October 11–16, 2020
Paper Number: SEG-2020-3428109
... inversion method based on azimuth seismic data At present, the prediction of rock strength parameters is mainly based on core experimental measurements or logging Ruger (1996) derived the approximate equation of the data. In this paper, the rock strength parameter data volume is obtained based on the rock...
Proceedings Papers

Paper presented at the 1st Canada - U.S. Rock Mechanics Symposium, May 27–31, 2007
Paper Number: ARMA-07-214
... strength from drilling data G. Hareland & R. Nygaard University of Calgary, Schulich School of Engineering, Chemical & Petroleum Engineering Department, Calgary, Alberta, Canada ABSTRACT: It is critical to obtain the rock strength parameters along the wellbore. Rock strength logs are used to conduct...
Proceedings Papers

Paper presented at the 53rd U.S. Rock Mechanics/Geomechanics Symposium, June 23–26, 2019
Paper Number: ARMA-2019-2093
..., collection of standard parameters such as rock quality designation and fracture frequency, and field estimation of intact rock strength. The effects of geotechnical biases resulting from drill core versus drift data collection are also compared. The effects of the mineralogical alteration assemblages on rock...
Proceedings Papers

Paper presented at the Abu Dhabi International Petroleum Exhibition & Conference, November 9–12, 2020
Paper Number: SPE-203259-MS
... and is agnostic to the input data type. Next, we describe a method to estimate rock strength from real-time drilling dynamics data and which is under-utilized for bit guidance. Geophysical logs from offset wells are then employed to estimate a related rock strength parameter. We reveal our data processing scheme...
Proceedings Papers

Paper presented at the Annual Technical Meeting, June 7–9, 1998
Paper Number: PETSOC-98-60
... another measurement. For example, identifying shale zones with the gamma my log would also be validated with SP, density-neutron and lithodensity tools. 3 Rock Strength The determination of strength parameters from correlations using density, acoustic and gamma ray logs from an offset well, are commonly...
Proceedings Papers

Paper presented at the 12th ISRM Congress, October 16–21, 2011
Paper Number: ISRM-12CONGRESS-2011-096
... into predictive algorithms for estimating mechanical properties from geophysical wireline logs. The database comprises ~600 triaxial compressive strength tests of sandstone-to-shale lithotypes and ~275 uniaxial and hydrostatic compaction tests of siliciclastic reservoir rocks (unconsolidated sands to tight gas...

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