2 edition of Anelastic strain recovery of rock core and crustal stress measurements. found in the catalog.
Anelastic strain recovery of rock core and crustal stress measurements.
Simon Richard Butterworth
Thesis (Ph.D.), University of East Anglia, School of Environmental Sciences, 1993.
situ rock stress determination in deep borehole and its application examples p. 87 Design and calibration of a new triaxial strain cell for rock stress measurement p. 95 Rock stress measurements in Alpi Apuane quarry sites by means of hydraulic fracturing (HF) p. Comparison between 2D overcoring and hydraulic fracturing stress measurements. a Schematic of local stress state at the circumference of a vertical borehole relative to the far-field maximum and minimum horizontal stresses (S Hmax and S hmin).Compressional breakouts (BO) form where differential stresses at the borehole wall exceed the rock strength. Azimuth (θ) is measured from S the edge of a breakout, stress and strength are in equilibrium, such that breakout.
In a multi-facetted study of Cretaceous Cardium sandstones at Wapiti in Alberta (McLellan, a), anelastic strain recovery measurements made on newly cored samples suggested that S Hmax was oriented at °. Subsequent differential strain curve analysis of the same cores gave an S Hmax azimuth of °. Fractures were propagated from the. Measuring Crustal Stress - Core-Based Methods Anelastic Strain Recovery Theory of ASR Practise of ASR Kaiser Effect Triaxial Stress Approach Uniaxial Stress Approach Core Damage and KE Microphysical Models 9.
Core-based methods help to estimate stress, and these methods include borehole relief (BR) using Borre probe/CSIRO hollow inclusion cell and flat jack (FJ), anelastic strain recovery (ASR), differential strain analysis (DSA), core disking (CD), and Kaiser effect (KE) by acoustic emission. core fractures, borehole imaging, and hydraulic fracturing and as such because it reflects the author’s experiences cannot be comprehensive. Other stress measurement techniques for deep boreholes not discussed here include anelastic strain recovery and shear wave anisotropy Drilling Induced Core .
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Enever, J. and McKay, J. () A note on the relationship between anelastic strain recovery and virgin rock stresses — a possible method of stress measurement, in Proc. ISRM Symp. on Investigation of Stress in Rock, Advances in Stress Measurement, Sydney, The Institution of Author: Bernard Amadei, Ove Stephansson.
The ASR (short for anelastic strain recovery) technique is widely used in deep 3-D stress measurements of rocks in crustal drilling, especially in seismic fracture zones with complex geologic.
The behavior of the inelastic strain of rocks under the loading of compression reflects the history of stresses applied to the rocks. A number of methods based on this rock property of stress memory have been proposed for measuring in-situ stress. The magnitudes of in-situ stress can be determined from drilled core samples by deformation rate analysis (DRA); in other words, rocks do Cited by: K.
MatsukiThree-dimensional in-situ stress measurement with anelastic strain recovery of a rock core W. Wittke (Ed.), Proceedings of the 7th International Congress on Rock Mechanics, Taylor and Francis, London (), pp.
Author: Bin Wang, Dongsheng Sun, Qunce Chen, Weiren Lin, A-Wei Li, Hui Cao. lithospheric dynamic processes. However, direct measurements of stress in the deep oceans, and in particular stress magnitudes, have proved to be technically difficult. Anelastic strain recovery measurements were conducted on 15 basalt core samples from Sites and during Leg 2.
Anelastic strain recovery method for estimating in situ stress Previous research. Voight () suggested that there is empirical justification for considering the recovered anelastic strain to be proportional to the total recoverable strain (both elastic and anelastic strains), and hence to the pre-existing state of stress in rheologically-isotropic rocks.
Leading edge technology in determining rock stress like quadruple packer and the Kaiser effect are presented together with classical methods like hydraulic fracturing. Borehole techniques (breakouts) and core-based methods (anelastic strain recovery) are illustrated.
With respect to stress data, we choose to present the scientific ultra-deep. Using Stress and Stress Measurement Methods Biot's  poroelastic theory, Haimson [6, 11, 13] derived the missing stress field and obtained the poroelastic pressure-stress relation for hydraulic fracturing (6) where K is a function of the Biot poroelastic coefficient, K c(, and the Poisson's ratio for the rock, v (7) (8) 2 - a(1 - 2v)(1.
Int. Rock Mech. Min. Sci. & Geomech. Abstr. Vol, No.7, pp./93 $ + Printed in Great Britain Pergamon Press Ltd Variability and Quality in ASR Data Represented by the Sandia Model S. BUTTERWORTHI- P.W. BURTON'~ INTRODUCTION Over the last few years Anelastic Strain Recovery (ASR) measurements have been used to determine in situ crustal stress.
Abstract. The behavior of the inelastic strain of rocks under the loading of compression reflects the history of stresses applied to the rocks. A number of methods based on this rock property of stress memory have been proposed for measuring in-situ stress.
The magnitudes of in-situ stress can be determined from drilled core samples by deformation rate analysis (DRA); in other words, rocks do. Evans's 6 research works with 50 citations and 59 reads, including: The comparison of core and geophysical log measurements obtained in the Nirex investigation of the Sellafield region.
Anelastic strain recovery measurements were conducted on 15 basalt core samples from Sites and during Leg A knowledge of rock stress. Measurements must begin as soon as possible after the core is cut off, releasing the in-situ stress, so as to capture the rapidly decreasing anelastic strain recovery.
Where WFSD-1 crossed the Yingxiu–Beichuan fault, the drill cores from both sides of the fault were extremely fragmented. A comparison of rock stresses measured by WASM AE with results from other techniques that measure the complete rock stress tensor, C.R. Windsor, E. Villaescusa & L.A.
Machuca. In-situ stress measurements using oriented core – A comparison of uniaxial vs triaxial Acoustic Emission results, E. Villaescusa, L. Machuca, X. Lei & T. Funatsu. The accuracy of the in situ stress directions and magnitudes determined from anelastic strain recovery measurements was substantiated by amore» The anelastic strain recovery method predicted the magnitudes of the maximum and minimum horizontal principal stresses to be MPa and MPa, respectively; with an azimuth of N63/sup 0/W +- 8.
Differential strain curve analysis—a new method for determining the pre-existing in situ stress state from rock core measurements, Prediction of hydraulic fracture azimuth from anelastic strain recovery measurements of oriented core, Probing the deep crustal stress field and brittle-ductile transition, KTB-Report 89–3, pp.
Anelastic strain recovery of rock core and crustal stress measurements. Author: Butterworth, Simon Richard. ISNI: Awarding Body: University of East Anglia Current Institution: University of East Anglia Date of Award: Availability of Full Text.
The anelastic strain recovery (ASR) method is a straightforward way to determine three‐dimensional in situ stress based on the time‐dependent relaxation of recovered core samples (Lin et. in-situ stress, and rock failure criteria. These first three chapters are the very foun-dation of rock mechanics, and could be used as a text for an introductory course in this field.
The last three chapters go beyond stress measurements, to describe stress profiles through the Earth’s crust, regional stress fields, the World Stress Map, and. Measuring Crustal Stress - Borehole Methods Classification of Measurement Techniques Hydraulic Fracturing Borehole Breakouts 8.
Measuring Crustal Stress - Core-Based Methods Anelastic Strain Recovery Rheological Basis Relaxation Apparatus Kaiser Effect Part III - Interpreting Stress Data 9.
Local Stress Data. Matsuki K () Three-dimensional in situ stress measurement with anelastic strain recovery of a rock core. In: Wittke W (ed) Proceedings of 7th international congress rock mech., Aachen, 1.
Leading edge technology in determining rock stress like quadruple packer and the Kaiser effect are presented together with classical methods like hydraulic fracturing.
Borehole techniques (breakouts) and core-based methods (anelastic strain recovery) are illustrated.Anelastic strain recovery (ASR) 12, 13, on the other hand, is a core-based method which relies on the measurement of the time-dependent strain recovery of rocks due to the sudden release of in.