Drilling-induced core fractures and in situ stress
نویسندگان
چکیده
منابع مشابه
Drilling Induced Core Fractures and Crustal Stress
Drilling induced core fractures, usually ignored in standard core logging, contain substantial information on the directions of horizontal stresses and the relative magnitudes of the three principal stresses. These fractures have a variety of shapes, variously referred to as petal, petal-centreline, saddle, cup, and scallop. Surprisingly, the morphology of the fractures suggests they are produc...
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This paper analyzes in-situ stress field in the Asmari formation with in the complex structures of the Zeloi and Lali oilfields located in the Dezful embayment, SW Iran. The orientation of the maximum horizontal stress, SHmax is determined on the basis of compressive borehole breakouts and drilling-induced tensile fractures observed in eight oil wells, in which we focus on well-log based method...
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The differential diagnosis includes musculo-tendinous injury, tibial compartment syndrome, tenosynovitis, intermittent claudication of the athlete and stress fracture. A presumptive diagnosis of stress fracture is based on the history and physical findings. In the past, confirmation of stress fractures has been delayed until x-rays showed an abnormality, often from three weeks to three months a...
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1 Case 1-A boy aged five developed a limp in his left leg two to three weeks before being seen, with no history of injury. There was swelling and tenderness over the upper end of the left tibia, and the radiograph showed a typical compression stress fracture of the upper tibial shaft. The internal and external callus is well shown. The pattern of stress fractures in the adult is different from ...
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General context: Shock barometry via petrographic analysis helps to understand cratering mechanics, especially mass movements in the central uplift, including its collapse in the late stage of cratering. Shock pressures recorded in lithologies of the central uplift may exceed 45 GPa, e.g., in the Vorotilovo core drilled into the center of the Puchezh-Katunki structure [1]. In other craters, sho...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Solid Earth
سال: 1998
ISSN: 0148-0227
DOI: 10.1029/97jb02333