Results 201 to 210 of about 124,397 (269)

On the nature of stress fractures

The American Journal of Sports Medicine, 1978
It is felt that stress fractures are caused by excessive, repetitive muscle forces acting across the affected bone. These fractures should be suspected in participants of athletic endeavors who present with a history of persistent, focal, activity-related pain regardless of their stage of physical conditioning.
C L, Stanitski, J H, McMaster, P E, Scranton   +2 more
openaire   +2 more sources

Experimental Investigation of Fracture Interaction between Natural Fractures and Hydraulic Fracture in Naturally Fractured Reservoirs

SPE EUROPEC/EAGE Annual Conference and Exhibition, 2011
Abstract The interaction between natural fractures and hydraulic fracture was observed in multiple naturally fractured blocks by a series of physical model tests. The effect of natural fractures and in-situ stress on fracture geometry was revealed. Three types of fracture geometry were observed due to a change of in-situ stress contrast.
Jian Zhou, Chengjin Xue
openaire   +1 more source

Detection and Characterization of Fractures in Naturally Fractured Reservoirs

SPE Annual Technical Conference and Exhibition, 2000
Abstract Imaging log, sonic log, optical microscopy, NMR, MRI, and tomography have greatly enhanced the possibility of measuring fracture geometric characteristics. However, the fracture hydraulic width and permeability can only be evaluated from dynamic data revealing production or adsorption along the wellbore.
VERGA, FRANCESCA, CARUGO C, CHELINI V, MAGLIONE R, DE BACCO G.   +4 more
openaire   +2 more sources

Hydraulic-Fracture Propagation in a Naturally Fractured Reservoir

SPE Production & Operations, 2010
Summary We present the results of numerical modeling that quantify the physical mechanisms of mechanical activation of a natural fault because of contact with a pressurized hydraulic fracture (HF). We focus on three stages of interactions: HF approaching, contact, and subsequent infiltration of the fault.
D. A. Chuprakov, A. V. Akulich, E. Siebrits, M. Thiercelin   +3 more
openaire   +1 more source