By P. K. Harvey, T. S. Brewer, P. A. Pezard, V. A. Petrov
Boreholes are normally drilled into crystalline rocks to guage their suitability for numerous purposes corresponding to waste disposal (including nuclear waste), geothermal strength, hydrology, sequestration of greenhouse gases and for fault research. Crystalline rocks contain igneous, metamorphic or even a few sedimentary rocks. The quantification and figuring out of person rock lots calls for vast modelling and an research of varied actual and chemical parameters. This quantity covers the subsequent elements of the petrophysical houses of crystalline rocks: fracturing and deformation, oceanic basement reports, permeability and hydrology and laboratory-based reports. With the turning out to be calls for for sustainable and environmentally potent improvement of the subsurface, the petrophysics of crystalline rocks is changing into an more and more very important field.Also on hand: functions of X-ray Computed Tomography within the Geosciences - ISBN 1862391394 Hydrocarbons in Crystalline Rocks - ISBN 1862391378 Fracture And In-situ pressure Characterisation of Hydrocarbon Reservoirs - ISBN 1862391300
Read or Download Petrophysical Properties of Crystalline Rocks (Geological Society Special Publication No. 240) PDF
Best nonfiction_3 books
Laser Precision Microfabrication
Miniaturization and excessive precision are speedily changing into a demand for lots of business tactics and items. consequently, there's larger curiosity within the use of laser microfabrication know-how to accomplish those ambitions. This e-book composed of sixteen chapters covers all of the themes of laser precision processing from primary facets to business functions to either inorganic and organic fabrics.
Shared Purpose: Working Together to Build Strong Families and High-Performance Companies
Is enterprise plagued by the steadiness of society? Is society suffering from the activities and attitudes of commercial? during this special and strong e-book, 10 modern thinkers go back a powerful "yes". With inventive insights and exciting examples, those authors make a startling suggestion: If company desires a effective crew and a ecocnomic destiny, it needs to take a management function in solidifying our social internet.
- Species Sensitivity Distributions in Ecotoxicology
- Zen: The Path of Paradox: Talks on Zen (Volume II)
- Bibliotheca Hagiographica Graeca (BHG), Vol. II: Ioannes Calybita-Zoticus
- The Life and Scientific Legacy of George Porter
Extra resources for Petrophysical Properties of Crystalline Rocks (Geological Society Special Publication No. 240)
Example text
7). g. Pezard 1990). Therefore, the separation between the two logs indicates that vertical fracturing occurs throughout the sill, but decreases near the bottom where the two logs come together. In the sediments, the LLD and LLS resistivity logs overlie each other and measure much lower resistivity values. In general, deep-reading resistivity logs, like the LLD, more accurately represent undamaged formation properties and are used for porosity and lithology interpretation. Fractures filled with water are usually more conductive than the surrounding rock.
GIESE E T AL. 0 ......................... 0 : : =:~ :'~ . . 0 . 0 ......... . 5 . ,. 5 ~r . I . ->~ ............... 0 . ~- ::::~'~"~ " ,,,,~. 5 ~-~.............. 0 800 700 (Tm) Fig. 9. Seismic velocities Vp and Vs derived from tomographic inversions at 3 m distance from the tunnel wall of the Faido adit (dotted line). The solid lines through the velocity values are polynomial fitting curves. The cataclastic zones at Tm 973 and Tm 2410 are surrounded by wider zones with lower wave velocities, which mark the disturbance zones in the Leventina gneiss (cf.
3). Natural gamma logs record the total gamma radiation detected in a borehole, and they are the most widely used nuclear logs for stratigraphic investigations. Sediments are much more radioactive than basalt or other intrusive mafic rocks, and therefore a large increase in gamma-ray activity is observed at the dolerite-sediment contact. Caliper logs measure the diameter of the hole. The two wells appear to be generally smooth, without any large washout zones. 5 cm. A neutron porosity log in Well 2 is shown in Figure 7.