uniaxial strength niosh sonic log

Recherche populaire

PDF Application of Artificial Neural Networks in , - Savoir plus

Uniaxial Compressive Strength UCS and sonic veloci ty , In situ estimation of roof rock strength using sonic logging, NIOSH , The method has been tested against sonic log and VSP data and ....

Search well logging strength SPE - Savoir plus

Schlumberger s Mechpro method went a step further by attempting to predict uniaxial compressive strength from the sonic log It was based on and Millers correlation between the static Young s modulus E and the uniaxial compressive strength C0 P 439...

Estimation of rock uniaxial compressive strength for an , - Savoir plus

Dec 01, 2018 0183 32 Laboratory tests for obtaining rock strength are the UCS test, triaxial compressive strength test, point load test, Schmidt hammer test, scratch test and indentation test to obtain rock strength from cuttings In a uniaxial strength test, a 54 mm diameter rock is cut from the core and put under a pair of pistons to be compressed by axial loads...

University of Wollongong Research Online - Savoir plus

RQD, diametral point load testing, uniaxial compressive strength from rock testing or axial point load testing or sonic log, moisture sensitivity, weak unit contacts, and the presence of overlying weak rock The units and their properties are then entered into the CMRR spreadsheet provided with Colwell, 2003 or ,...

Correlation of Sonic Travel Time to the Uniaxial , - Savoir plus

Correlation of Sonic Travel Time to the Uniaxial Compressive Strength of US Coal Measure Rocks David C Oyler, Research Engineer Christopher Mark, Principal Research Engineer Gregory M Molinda, Lead Research Scientist NIOSH-Pittsburgh Research Laboratory Pittsburgh, PA ABSTRACT Sonic travel time logging of exploration boreholes is routinely...

Elastic and Shear Moduli of Coal Measure Rocks Derived , - Savoir plus

CDC/NIOSH, Pittsburgh Research Laboratory, Disaster Prevention and Response Branch, 626 Cochrans Mill Road, PO Box 18070, Pittsburgh, PA 15236, USA , as well as the strength under uniaxial and triaxial compression were determined From the analyses of the data, , GR , density log DL and sonic log SL that calculate basic formation ....

Compressive Strength Of Rock Calculation - Savoir plus

Jan 09, 2020 0183 32 Correlation of Sonic Travel Time to the Uniaxial , District, mine planners have easy access to a wealth of rock Correlation of Sonic Travel Time to the Uniaxial Compressive Strength of US Coal Measure Rocks David C Oyler, Research Engineer Christopher Mark, Principal Research Engineer Gregory M Molinda, Lead Research Scientist NIOSH-Pittsburgh Research Laboratory...

Geotechnical data from geophysical logs stress, strength , - Savoir plus

The sonic velocity log is also used to provide estimates of the uniaxial compressive strength UCS of the rock and the coal The acoustic scanner log has replaced the dipmeter and caliper logs in providing information on bedding dips and borehole breakout and has the additional capability to...

Correlation of Sonic Travel Time to the Uniaxial , - Savoir plus

Jan 01, 2008 0183 32 Sonic travel time logging of exploration boreholes is routinely used in Australia to obtain estimates of coal mine roof rock strength Because sonic velocity logs are relatively inexpensive and easy to obtain during exploration, the technique has provided Australian underground coal mines with an abundance of strength data for use in all aspects of ground control design...

Rock strength predictions from wireline logs Journal , - Savoir plus

The velocity-deviation log, which is calculated by combining the sonic log with the neutron-porosity or density log, provides a tool to obtain downhole information on the predominant pore type in carbonat The log can be used to trace the downhole distribution of ,...

In Situ Estimation of Roof Rock Strength using Sonic Logging - Savoir plus

strength data for use in all aspects of ground control design However, the technique depends upon reliable correlations between the uniaxial compressive strength UCS and the sonic velocity This paper describes research recently conducted by NIOSH aimed at developing a correlation for use by the US mining industry...

Predicting uniaxial compressive strength from empirical , - Savoir plus

Jun 25, 2017 0183 32 Abstract Empirical, core-based, predictive correlations for the calculation of uniaxial compressive strength UCS were developed from compressive sonic velocity measurements 55 whole core samples and porosity, density, and unconfined compressive tests 110 whole core samples...

PERFORMANCE OF ROOF SUPPORT UNDER HIGH STRESS IN , - Savoir plus

so its thickness and strength were estimated from a nearby surface corehole The low uniaxial compressive strength and RQD for the bolted horizon results in an estimated Coal Mine Roof Rating CMRR of 37 Mark et al 2002 No pre-mining in situ stress measurements were made as part of this study However, nearby measurements...

Downhole Geophysical Logging Applications for Mining , - Savoir plus

Mar 29, 2018 0183 32 Uniaxial Compressive Strength UCS , psi Sonic - delta t microsec/ft Sonic vs UCS - Outliers Removed, By General Lithology Sandstone Shale Fireclay Silstone Expon Sandstone Expon Shale Correlation of Sonic Log Data with Laboratory Uniaxial Compression Testing >Regional correlations have been established by others Oyler, et al...

In situ estimation of roof rock strength using sonic , - Savoir plus

Sonic travel time logging of exploration boreholes is routinely used in Australia to obtain estimates of coal mine roof rock strength Because sonic velocity logs are relatively inexpensive and easy to obtain during exploration, the technique has provided Australian underground coal mines with an abundance of rock strength data for use in all aspects of ground control design...

Oil well compressive strength analysis from sonic log a , - Savoir plus

The acquisition of rock strength along the wellbore can be obtained from various sources such as logs, cutting and rock mechanical test or drilling data This paper posed a trial to obtain compressive strength profile of oilfield s formation from a sonic log According to the results, the formations have been divided into several groups from ....

Health Safety Meeting Dates Institute Of Infectious , - Savoir plus

Mar 02, 2021 0183 32 IDM H S committee meetings for 2021 will be held via Microsoft Teams on the following Tuesdays at 12h00-13h00 2 March 2021 1 June 2021 31 August 2021...

Prediction of Rock Strength using Drilling Data and Sonic , - Savoir plus

Uniaxial test also called unconfined compression test is one of most important tests used to measure rock strength It is critical to obtain the rock strength parameters along the wellbore Awareness of rock strength could better control drilling problems such as pipe sticking, tight hole, collapse, pack off and sand production Rock strength also controls the drilling rate of penetration ROP...

Prediction of Rock Strength using Drilling Data and Sonic Logs - Savoir plus

purpose of this research was to predict the uniaxial compressive strength based on sonic logs as a function of sonic travel and formation porosity For obtaining continuous log strength along the wellbore in Ahwaz oilfield, quantitative relationships were petrophiscs logs in ,...

A log based analysis to estimate mechanical properties and , - Savoir plus

modulus EM , strength properties mainly the uniaxial compressive strength UCS , and tensile strength and calibrate them using lab experimental data, mainly from triaxial tests 3 Estimate the vertical stress using the density log and pore pressure from existing methods such as Eaton equation based sonic or resistivity logs Also...

PDF EMPIRICAL ESTIMATION OF THE ROCK STRENGTH OF , - Savoir plus

The sonic velocity log has been used as an indicator for unconfined uniaxial rock strength UCS in many oil fields and underground min The relationship between the rock strength and sonic ....

theory factory In Meeting Londinesi Solitari Selvon 82400 , - Savoir plus

Mar 19, 2021 0183 32 All fly cmd login century services uk ltd kenmore elite refrigerator thermostat location al final es parte de un proposito best countryside in england lg 29ub65-p test haydn kwartet cesarski wiki mikrosamochody od 14 lat odadn lfwa tiger woods 7 iron stinger disegni esoterici alex katz pop art paintings actors studio bravo tv martellate vigonza...

Estimation of Coal Measures rock strength using sonic and , - Savoir plus

misc etde_5633228, title = Estimation of Coal Measures rock strength using sonic and neutron logs author = McNally, G H abstractNote = Downhole geophysical logs, particularly neutron-neutron and sonic, have been used for estimating overburden strength at ten mine sites in Australia The results are used in formulating specifications for numerical and physical models of coal extraction ....

Development of a new correlation to determine the static , - Savoir plus

Jan 30, 2017 0183 32 The estimation of the in situ stresses is very crucial in oil and gas industry applications Prior knowledge of the in situ stresses is essential in the design of hydraulic fracturing operations in conventional and unconventional reservoirs The fracture propagation and fracture mapping are strong functions of the values and directions of the in situ stress Other applications such as ....

Prediction of Rock Strength using Drilling Data and Sonic Logs - Savoir plus

The calculations of uniaxial Compressive Strength UCS are based on a simplified version of the ROP model proposed for tricone bits The purpose of this research was to predict the uniaxial compressive strength based on sonic logs as a function of sonic travel and formation porosity For obtaining continuous log strength along the wellbore in ....

ASP Flashcards Quizlet - Savoir plus

the combination of the severity of a defined exposure with its frequency of occurrence The technique that effectively decreases a project s schedule risk without increasing the overall risk is to incorporate slack time into the project s critical path schedule early in project planning...

Correlation of Sonic Travel Time to the Uniaxial , - Savoir plus

Sonic travel time logging of exploration boreholes is routinely used in Australia to obtain estimates of coal mine roof rock strength Because sonic velocity logs are relatively inexpensive and easy to obtain during exploration, the technique has provided ,...

Stress mechanical Medical search - Savoir plus

Stress This aim of the present narrative review was to illustrate the current evidence on the importance of mechanical stress in the , Overall, treatment selection should be tailored to counterpart the effects of mechanical stress, which influences inflammation , 2 Airways Mechanical Stress in Lung Diseas...

PDF Figure 1 The Point Load Tester USING THE POINT , - Savoir plus

A full range of equipment was purchased to perform tests types using color photographs of rock core in an index guide including uniaxial compressive strength, indirect tensile It as been widely accepted as a means for consistent rock strength, point load index, triaxial compressive strength, flexural identification and for use in computer data ....

INDIRECT PREDICTION OF ROCK ELASTICITY AND , - Savoir plus

predicts rock mechanical shear strength, tensile strength and uniaxial compressive strength Fjaer et al, 2008 In this study, wireline log data compressional sonic, shear sonic and density were used in order to determine the mechanical properties for the geological column starting...