Abstract Feasibility of drilling with pure supercritical carbon dioxide to serve the needs deep underbalanced operations has been analyzed. A case study involving access a depleted gas reservoir illustrates need for such study. For this well, nitrogen was initially considered as fluid. Dry nitrogen, due its low density, unable generate sufficient torque in downhole motor. Mixture and water, stabilized foam, generated torque, but made it difficult maintain conditions. This diminished intended...

Financial institutions, along with worldwide economic systems, face urgent threats from money laundering, which enables major illegal activities, including fraud and terrorism financing, as well organized crime operations. Money laundering detection, alongside its prevention, requires sophisticated analytic systems to remain effective efficient. Researchers have created a machine learning methodology based on the Elliptic dataset boost Anti-Money Laundering (AML) systems. The application of...

This paper provides an overview of the development and optimization abrasive-slurry-jet methods for completion stimulation applications. Abrasive particles added to fluid dramatically reduced system pressure requirements. The discusses technical capabilities cutting through various materials formations also improvements proven fluid-jet systems are capable rocks all types, with greater location control that is not susceptible geologically induced deviations encountered mechanical methods....

The numerically calculated and digitally stored full complex wavefront emerging from an object or scene is called a computer generated hologram (CGH). CGH generation involves intensive calculations resulting in huge amount of computation time. This makes it hard to display the object’s holographic information real Therefore, optimization code required reduce involved computational cost. present work effort optimize using basic frugal techniques. Different techniques viz. analytical solution...

Abstract Production of oil/gas to meet the increasing energy needs results in generation significant amount CO2. This study presents experimental and simulation work understand opportunities challenges sequestering CO2 carbonate rocks typical aquifers reservoirs Middle East. corefloods were conducted samples from analog outcrops simulate sequestration process, and, changes pore-space due dissolution/precipitation quantified by time lapse CTscans measurement relative permeabilities. Density...

Abstract It is well known that the majority of carbonate reservoirs are neutral to oil-wet. This leads much lower oil recovery during waterflooding since there no spontaneous imbibition water in heterogeneous reservoir displacement. has been verified by a number researchers Adjustment ion concentration brine solutions, or adding surfactant solutions can enhance altering wettability. In published literature, contact angle studies usually refer measurement on calcite crystals and results for...

Accurate short term solar irradiation forecasting is necessary for smart grid stability and to manage bilateral contract negotiations between suppliers customers. Traditional machine learning methods are unable acquire rectify nonlinear characteristics from dataset, which not only complicates model construction but also affect prediction accuracy. To address these issues, a deep based architecture with predictive analysis strategy developed in this manuscript. In the first stage, original...

Abstract Growing concerns over global climate change is also increasing the interest in developing technologies to reduce concentration of carbon dioxide (CO2) atmosphere. Geological Carbon Sequestration which injects CO2 into subsurface formations such as deep saline aquifers, depleted hydrocarbon reservoirs are some viable options emissions Deep aquifers a particularly good choice due their wide geographical distribution and proximity emission sources that provide easy accessibility...

A dual gradient, deepwater drilling system based on dilution of riser mud requires economically separating the into a low density fluid and higher fluid. This study investigated practicality accomplishing this separation using hydrocyclones centrifuges examined possible benefits efficiency each. The experiments were conducted laboratory centrifuge 2 in. hydrocyclones. was able to separate near ideal densities for However, dense slurry retained in had lower electrical stability than feed...

Abstract It is well known that with continued production from wet gas reservoirs, the reservoir pressure eventually falls below dew point leading to condensation and loss of productivity in reservoir. The concept simultaneously injecting CO2 a for long term storage while at same time accelerating intriguing promising. may also interact carbonate matrix by changing porosity permeability host rock; this true reservoirs are found Gulf Region. Core floods experiments carbon dioxide aging were...

Abstract Dew point pressure is a critical measurement for any wet gas reservoir. Condensate blockage likely when the reservoir decreases below dew and this can result in reduction of productivity. Errors measuring lead to errors estimation onset condensate thus be detrimental management fields. This work presents experimental verification new method determining pressures fluids. Results obtained from are compared calculated values based on Peng Robinson equation state. determination...

Abstract In this paper a review of the thermodynamics gas/condensate and water systems with hydrogen sulfide water/hydrocarbon wetting its influence on corrosion is presented. Compositional analysis used to provide information variation different material streams composition as function depth. Although surface, liquid stream well can predominately consists hydrocarbon, downhole have very composition. The composition, pressure, temperature, ionic flow regime interesting implications sour...

Abstract Fracture diagnostic data for shale wells show that the fracture system after hydraulic fracturing is quite complex. Accurate and efficient simulation modeling of complex natural networks critical evaluation well performance stimulation effectiveness in unconventional oil gas reservoirs. The traditional method based on local grid refinement (LGR) has limitations handling 3D geometry. In addition, its computational efficiency low, especially dealing with a large number fractures...

Abstract Premature breakthrough and low sweep efficiency during waterfloods result from heterogeneity in the permeability field a reservoir. Production wells with inflow control valves/inflow devices (ICVs/ICDs) have ability to reduce water-oil ratio by shutting flow ports high water cut. Subsequently, this technology has been limited response based on detection of at production wells. Deep reading technologies reported be successful detecting approaching waterfront before its breakthrough....

ABSTRACT Betelgeuse is one of the brightest red supergiant (RSG) stars because its proximity to Solar system. This makes it important when deducing features and evolutionary phases RSG stars. has always been a well-observed target but especially during past year, reduction in brightness. It speculated that star last stage(s), soon going explode. However, recent work, proposed episodic mass loss dust condensation around are major reasons for In this we have performed detailed thermodynamical...