... Upstream Oil & Gas borehole application fracture Reservoir Characterization reservoir geomechanics fracture pattern hydraulic fracturing Loading Rate borehole surface 13th international congress evolution panchadhara compressive stress rock mechanics isrm13 fracture initiation...

... rock burst. The state and achievements associated with hydraulic fracturing technology applied in Chinese coal mines are summarized in this paper. Theories related to hydraulic fracturing are of the essence in fracture design to determine the fracture initiation and propagation pressure and predict...

... ABSTRACT: Fracture propagation code (FRACOD) is a two-dimensional Displacement Discontinuity Method (DDM) computer code that was designed to simulate fracture initiation and propagation. The latest development introduced in the code allows the possibility to simulate anisotropy of rock medium...

... ABSTRACT This paper summarizes recent developments in modelling explicit rock fracture propagation caused by mechanical, thermal and hydraulic forces. A fracture propagation code, FRACOD, has been developed for predicting the explicit fracturing process such as fracture initiation and fracture...

...~ ~ maybe produced if the horizontal loads are very large. Hence, the maximum principal stress were mostly limited up to 2.OMPa. .. ;. - . Hydraulic fracturina' , (l ,. Linear increase of internal pressure,'P, by hsnd pumpings suddenly stops when fracture initiation occurs and the pressure gradually...

... Summary Conventional unixial compression tests on fresh, unweathered dolerite have shown that both fracture initiation and unstable fracture propagation, as determined from the stress — volumetric strain characteristics, are affected by the specimen equilibrium moisture content to the same...

... Summary It is postulated that two „coefficients of friction" can be regarded as controlling both fracture initiation in and ultimate failure of isotropic brittle rocks in accordance with either Griffith's original theory or that as modified by McLintock and Walsh. On the basis...

... Cardboard strength fracture initiation Griffith diameter examination brittle material principal stress 0 propagation hydraulic fracturing Brazilian test specimen fracture propagation tensile strength plane end condition fracture contour stress distribution equation...

... Summary Griffith's theory of brittle fracture, modified to account for the frictional effects due to crack closure in compression, has proved a reliable basis for the understanding of fracture initiation in hard rocks. It suffers from the disadvantage that it gives no information...