This prospective study compared the efficacy of arthroscopic debridement in osteoarthritic knees under local, general or peridural anaesthesia. Between 1997 and 2001, 201 arthroscopic debridements were performed in 197 patients (173 partial meniscectomies, 192 articular trimmings, 119 microfractures, 201 lavage procedures) in 197 patients. Patients were treated under local (Group "L", n = 67), ...

This paper describes a new modeling framework for microscopic to reservoir-scale simulations of hydraulic fracturing and production. The approach builds upon fusion two existing high-performance simulators behavior: the GEOS code hydromechanical evolution during stimulation TOUGH+ multi-phase flow are informed by experimental studies at laboratory scale incorporate important micro-scale mechani...

The study of microfractures in shale is mainly based on qualitative description. Conversely, quantitative description the parameters can provide a basis for fracture characterization and physical properties. Nine reservoir samples Wufeng–Longmaxi Formation Jiaoshiba area were studied, using backscattered two-dimensional multiscale resolution imaging technology, combined with high-resolution map...

Aggregation-induced emission (AIE) luminogens are attractive dyes to probe polymer properties that depend on changes in chain mobility and free volume. When embedded polymers the restriction of intramolecular motion (RIM) can lead their photoluminescence quantum yield (PLQY) strong enhancement if local microviscosity increases (lowering volume). Nonetheless, measuring PLQY during stimuli, i.e. ...

Abstract The spontaneous imbibition (SI) process in shale oil reservoirs is not only influenced by capillary force, but also the osmotic pressure between fracturing fluid and formation water nanopores media. In this study, experimental methods are used to investigate mechanisms of osmosis SI, taking into account presence initial reservoirs. To effect osmosis, SI experiments were performed on fi...

Abstract Core samples were collected from three wells, one onshore and two offshore, Qatar’s Upper Jurassic Arab D reservoir. The subjected to multiproxy petrographic chemical analyses identify their micro- nanoporosity types understand evolution destruction. Based on the petrophysical properties of studied rocks, succession was divided into seven rock types. Primary microporosity includes inte...

A simulated reservoir model, based on the permeability fractal model and three-dimensional (3D) Gaussian filter, was established to account for in-layer interlayer heterogeneity so that result conforms law of geological statistics. Combined with an embedded discrete fracture method (EDFM), a multiscale system established, forming numerical simulation multiphase flow in horizontal wells heteroge...

SYNOPSIS The properties and deterioration in strength of cemented tailings backfill (CTB )in the underground acidic environment under oxidizing conditions were studied. X-ray diffraction analysis scanning electron microscopy surface CTB was carried out, sulphuric acid corrosion mechanism elucidated. tested included compressive strength, elastic modulus, cohesion, internal friction angle, variat...