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Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-036
... stress hydraulic fracturing Finland Johansson instrument compressive stress reservoir geomechanics Deformation property borehole dilatometer evaluation Reservoir Characterization hydraulic fracture loading pressuremeter test fracture dilatometer diameter deformation measurement Poisson...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-028
... Reservoir Characterization axial gauge axial strain Upstream Oil & Gas variability instrument reservoir geomechanics variation axial compensation gauge situ stress Symposium orientation borehole axial strain compensation compensation Drilling strain change stress relief...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, May 10–12, 2016
Paper Number: ISRM-ISRS-2016-035
... Abstract The ANZI strain cell and the overcoring method of stress relief have been used for in situ stress measurements in a wide range of rock types for more than 30 years. This instrument uses an inflatable packer system to bond strain gauges directly to the rock on the wall of the pilot...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-044
... ABSTRACT: This paper mainly focuses on the quality of crustal strain observations. Carry on works in standard, metrology and quality inspection three aspects to establish a quality assurance system ensures crustal strain instruments have corresponding quality assurance measure in production, station...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-037
... technique etc. are introduced in this paper. The observation locations and earth-quake precursor application in china are also described. 1 INTRODUCTION A key observational requirement in the study of earth- quakes is to observe deformation. The borehole defor- mation instrument is a very important...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-017
... Method (CBDM). In this paper, the theory of the CBDM is described, as well as the prototype instrument with the laser displacement sensor. Analyzing influence factors on measurement result theoretically, it makes clear that stress change within rock mass can be estimated by the CBDM. 1 INTRODUCTION...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-129
... ABSTRACT: A new instrument of 3-component volume borehole strainmeter is developed in China and the primarily function is for borehole strain measurement. The sensor is designed on the base of type TJ-2 volume borehole strainmeter, and it has three independent components which make it being...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-126
... observation is chosen for more than one underground test items of the integrated observing system (Chen et al. 1995), mainly including the underground observation broadband seismometer, tilt-meter, component strain sensor (1983.), magnetometer and temperature measurement instrument (Su 2003). It is of great...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-132
... strata. This new technology will promote consequently our understanding of presently active geological processes and its relation to earthquakes and tectonics. Based on previous experiences of developing RZB type borehole strainmeter a new multi-component borehole instrument for deep boreholes has been...
Proceedings Papers

Paper presented at the ISRM International Symposium on In-Situ Rock Stress, August 25–27, 2010
Paper Number: ISRM-ISRS-2010-131
... existed in strain waves. 1 GENERAL INSTRUCTIONS Most precursor instruments are digitalized in our country in this years, their sampling rate is 1 time per minute. Signals such as daily, monthly, yearly or longer periodic information are hided in the observational data. Under normal circumstances...

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