Abstract Carbon dioxide has gradually found widespread usage in the field of science and engineering while various efforts have focused on ways to combat menace resulting from release this compound atmosphere. A major approach combating is by storage geological formations ranging depleted reservoir types such as saline aquifers other carbon sinks. In research study, we reviewed experimental, modeling, studies related underground CO 2 . considerable amount been conducted simulating modeling...

Abstract Naturally Fractured Reservoirs (NFR) hold a significant fraction of remaining petroleum reserves. Recovery factors from NFR are usually less than in conventional reservoirs due to associated high uncertainty throughout the characterisation and modelling phases. This particularly includes upscaling fracture domain using Discrete Fracture Networks (DFN). Computer assisted history matching prediction is becoming increasingly popular as they help finding multiple history-matched models...

Abstract Determining the optimum well locations while developing a field contributes significantly to efficient reservoir management. Most optimization problems have focused on maximizing Net Present Value (NPV) of project. However, ultimate aim projects differs between international and national oil companies. The primary companies (IOCs) is maximize its profit (NPV). As far as company concerned, apart from NPV one main objective sustain resources for long possible by delaying abandonment...

Abstract As the majority of conventional reservoirs are reaching maturity, attention is gradually shifting towards unconventional and heavy oil reservoirs. Steam flooding, Miscible/Immiscible CO2 Polymer flooding Water Alternating Gas (WAG) most common EOR techniques currently being employed in industry. However, it has been recently proved that alternating gas (PAG) a better alternative to other processes as provides improved sweep efficiency (Zhang et. al. 2010, Li Schecter, 2014, Kong...

Summary In well placement optimization, simultaneously satisfying the investors and environmental agencies is difficult because enforcing regulations have negative impact on economic returns. Thus, a balance between ensuring profitability keeping to must be found. The NPV often used as an indicator of performance while VRR one factors safety. Recently, study was conducted proposing use weighted combination objective function in optimization. This approves importance considering both...

A Finite volume based numerical study on lid driven cavity flow having partially heated bottom wall with constant heat flux is presented. Effect of Rayleigh number between 10 3 -10 6 , Richardson ranging 0.5 to 8 and length heating zone (0.2, 0.8) has been studied. represents the extent thermal input its rise leads strengthening convection effect. Formation secondary vortices in slows down due combined effect top movement. Temperature distribution gets increasingly nonlinear peak shifts...

Abstract Darcy model fails to accurately flow in karst reservoirs because the profiles free-flow regions such as vugs, fractures and caves do not conform Darcy’s law. Flows karsts are often modelled using Brinkman model. Recently, DMOPD approach was introduced reduce complexity of modelling single-phase Karst aquifers. Modelling two-phase Brinkman’s equation requires either a method tracking front or introducing saturation component equation. Both these methods introduce further an already...

This paper is aimed at demonstrating a genetic algorithm method and applying it to predict the water quality of reservoir in Taiwan island using remote sensing data.Genetic algorithms will be combined with operation tree (GAOT) find relationships between input output data.A fittest function type obtained automatically from this method.The advantages GA are global optimization, nonlinearity, flexibility parallelism.In current case study, used construct relationship algae concentration Landsat...

Summary In this paper two different 2D synthetic reservoirs have been used to model tracer transport better understand the geological structure of reservoir, by sequentially solving Brinkman’s equation followed advection-diffusion-adsorption using cell centred finite volume approach. The use is motivated fact that it simplifies numerical modelling allowing a single effect both free flow and porous regions, thus in reducing error due improper interface between regions. same problems were also...

Stochastic optimization is an important tool employed to manage salt intrusion and increased freshwater production in coastal aquifers by estimating the optimum well locations operation parameters. In karst aquifers, shape location of caves are often uncertain Thus, it becomes necessary take into consideration uncertainties when optimizing water from such aquifers. The uncertainty associated with parameterization handled creating several equiprobable realizations through stochastic...

Summary Deciding the life cycle of field development projects is one problems that routinely face reservoir asset managers. In this work we investigate effect production time in well placement optimization as adding spacing constraints. To make investigations a synthetic heterogeneous example was used, and Covariance matrix adaption evolutionary strategy (CMA-ES) coupled with numerical simulator used an tool. The made on locations oil producers water injectors well. Two cases were...

Contaminant transport in porous media is often modeled by solving the Advection Dispersion Equation (ADE) which describes way contaminant moves within bulk fluid as well movement of due to phase. The simulation can however prove be computationally expensive especially if medium discretized into high-resolution grid blocks. We propose an interwell model for advection dispersion equations (ISADE) predict concentration observed at pumping well. This method comprises two main steps. Initially,...

Summary The Brinkman’s equation simplifies the numerical modelling of karst reservoirs by allowing use a single transport to model flow fluids in both free and porous regions, effect reducing error arising from improper interface between two regions. However, most equations available within deal with steady conditions. This approach however may not be accurate where unsteady conditions exist. We considered effects adding an term equation. solved coupled conservation-transport that models...

<h3>Background</h3> Atypical femoral fracture (AFF) is an uncommon but important type of fracture. It concerning because the associated morbidity, bilateral nature condition and delay in healing which has significant implications on health patients. <h3>Objectives</h3> To identify other risk factors contributing to development atypical fractures our cohort patients presenting liaison service. <h3>Methods</h3> We identified a case series 18 cases were retrospectively from June 2006 January...

<h3>Background and aims</h3> Total knee arthroplasty is a commonly performed orthopaedic procedure associated with significant postoperative pain. Increasingly in recent years the trend has been towards advocating earlier mobilization of patients postoperatively to facilitate recovery prevent complications. The aim this study was assess if adductor canal block (ACB) could provide similar analgesia femoral nerve (FNB) while sparing motor function quadriceps muscles. Our hypothesis that ACB...