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My God !!! This whole discussion makes me wonder if I am not from Mars and landed here in the dark ages... at least before Francis Bacon's time... LAD Fernandes (The Brazilian Nut) Enviado por Samsung Mobile <div>-------- Mensagem original --------</div><div>De : "Krueger, Scot" <[log in to unmask]> </div><div>Data:04/07/2015 13:52 (GMT-03:00) </div><div>Para: [log in to unmask] </div><div>Assunto: Re: Teaching Structural Geology </div><div> </div>It is always dangerous to assume that just because you don’t use a technology that “nobody” uses that technology. Stress and strain are the fundamental processes that drive the deformation of rocks (i.e. structural geology). It touches so many aspects of the study that I would argue that an absence of grounding in the basic concepts would be a serious shortcoming. I am a structural geologist in the oil and gas industry, and we deal with critical stress-strain problems on a daily basis. From my professional experience I would add the following key reasons to want to know how stress tensors work: Wellbore stability during and after drilling Avoiding drilling induced fractures and/or seismicity Fracking of tight rocks to enhance permeability to fluids Pore pressure prediction Subsurface fluid migration in the overpressured conditions of most deep basins Hydrocarbon column height prediction Basic “pore pressure-stress-strain” relationships associated with the formation of faults and folds Subseismic fault and fracture prediction Salt tectonics Mobile shale tectonics And these are just off the top of my head. I could come up with many more routine structural geology tasks which critically depend on a firm grasp of stress-strain relationships if I spent a little time reviewing past projects. It is not a stretch to argue that the modern energy-intensive lifestyle we have established would not be possible without structural geologists and geological engineers with a firm grounding in stress-strain relationships. It touches every prospect we ever propose, every well we ever drill, and every reservoir we ever produce. Obviously, I am a strong advocate of stress-strain relationships being part of the core curriculum in structural geology training. It is impossible to come to a process-driven understanding of deformed rocks without it. And, when paired with the more mining-related subdisciplines listed previously, I think a reasonable argument could be made that we could not explore the subsurface without it. Scot Krueger From: Tectonics & structural geology discussion list [mailto:[log in to unmask]] On Behalf Of Steven Micklethwaite Sent: Monday, April 06, 2015 5:59 PM To: [log in to unmask] Subject: Re: Teaching Structural Geology Reasons I DO want to know the stress tensor of a rock: Getting hot dry rock geothermal hydraulic fracturing to work. Mine wall stability. Hydrocarbon reservoir engineering. CO2 storage. Fault seal limitations. Stoping. Economics of ore shoot extraction. Earthquake hazard assessment using dynamic or mechanical models. Is this real world enough? From: Tectonics & structural geology discussion list [mailto:[log in to unmask]] On Behalf Of Sunil Gupta Sent: Saturday, 4 April 2015 8:41 AM To: [log in to unmask] Subject: Re: Teaching Structural Geology Carl- ikr "If only I knew the stress tensor for this rock!" exclaimed no geologist actually looking at a rock, ever. -Sunny Date: Wed, 1 Apr 2015 18:11:33 -0400 From: [log in to unmask] Subject: Re: Teaching Structural Geology To: [log in to unmask] I suspect you're confusing my point about research versus introductory teaching. I would never consider suggesting what someone should research because it is impossible to predict in advance what research will pay big dividends (your laser example) and what will not (some example we've never heard of). My point was about how to best spend the limited and valuable time available as an instructor of an introductory level structural geology course. Carl Little Consulting Geologist Toronto, ON, Canada On 29 March 2015 at 12:37, Krabbendam, Maarten <[log in to unmask]> wrote: You may have a point, but the laser was once intellectual masturbation, Maarten Krabbendam From: Carl Little [[log in to unmask]] Sent: 29 March 2015 10:00 To: [log in to unmask] Subject: Re: Teaching Structural Geology Spending half a course on a topic which the students will struggle to find applications for in the real world is little more than intellectual masturbation, it seems to me. Carl Little Consulting Geologist Toronto, ON, Canada This message (and any attachments) is for the recipient only. NERC is subject to the Freedom of Information Act 2000 and the contents of this email and any reply you make may be disclosed by NERC unless it is exempt from release under the Act. Any material supplied to NERC may be stored in an electronic records management system.