Summary Many naturally fractured reservoirs around the world have depleted significantly, and improved-oil-recovery (IOR) processes are necessary for further development. Hence, modeling of has received increased attention recently. Accurate simulation (NFRs) is still challenging because permeability anisotropies contrasts. Nonphysical abstractions inherent in conventional dual-porosity dual-permeability models make them inadequate solving different fluid-flow problems reservoirs. Also,...

Summary We present the results of compositional reservoir simulation a prototypical CO2 sequestration project in deep saline aquifer. The objective was to better understand and quantify estimates most important storage mechanisms under realistic physical conditions. Simulations few decades injection followed by 103 105 years natural gradient flow were performed. impact several parameters studied, including average permeability, ratio vertical horizontal residual gas saturation, salinity,...

Summary Hydraulic fracturing is a dominant technology in unconventional resources development. Recent advances fracture-diagnostic tools and fracture-propagation models make it necessary to model fractures with complex geometries reservoir-simulation studies. In this paper, we present an efficient method reservoir simulators. Through nonneighboring connections (NNCs), embedded discrete-fracture modeling (EDFM) formulation applied simulators properly such as fracture networks nonplanar...

Abstract Advancements in horizontal drilling with hydraulic fracturing have enabled commercial oil production from Bakken tight reservoirs. However, the primary recovery factor remains very low (less than 15%), resulting high volume of remaining place. Hence, it is extremely important to investigate application enhanced methods. Carbon dioxide (CO2) injection as a huff-n-puff process preferred approach improve In this work, we present effect CO2 molecular diffusion and performed series...

Summary Production from shale-gas reservoirs plays an important role in natural-gas supply the United States. Horizontal drilling and multistage hydraulic fracturing are two key enabling technologies for economic development of these reservoirs. It is believed that gas shale mainly composed free within fractures pores adsorbed organic matter (kerogen). generally assumed literature monolayer Langmuir isotherm describes gas-adsorption behavior However, this work, we analyzed four experimental...

Hydrogen (H2) is an attractive energy carrier to move, store, and deliver in a form that can be easily used. Field proven technology for underground hydrogen storage (UHS) essential successful economy. Options this are manmade caverns, salt domes/caverns, saline aquifers, depleted oil/gas fields, where large quantities of gaseous have been stored caverns many years. The key requirements intrinsic porous rock formation seasonal are: adequate capacity, ability contain H2, capability...

Abstract We present the results of compositional reservoir simulation a prototypical CO2 sequestration project in deep saline aquifer. The objective was to better understand and quantify estimates most important storage mechanisms under realistic physical conditions. Simulations few decades injection followed by 103 105 years natural gradient flow were done. impact several parameters studied, including average permeability, ratio vertical horizontal residual gas saturation, salinity,...

In this paper we present a partitioning interwell tracer test (PITT) technique for the detection, estimation, and remediation performance assessment of subsurface contaminated by nonaqueous phase liquids (NAPLs). We demonstrate effectiveness examples experimental simulation results. The results are from experiments in columns packed with Ottawa sand. Both method moments inverse modeling techniques estimating NAPL saturation sand packs demonstrated. use UTCHEM, comprehensive...

Abstract Accurate modeling of hydrocarbon production is a necessary, yet challenging step for economic exploitation unconventional resources. One the main challenges to model flow horizontal well from complex network hydraulic and natural fractures. Many reservoirs comprise well-developed fracture networks with multiple orientations patterns based on microseismic data. Conventional dual porosity permeability models are not adequate these Also, it neither practical nor advantageous large...

The recent development of tight oil reservoirs has led to an increase in production the past several years due progress horizontal drilling and hydraulic fracturing. However, expected recovery factor from these is still very low. CO2-based enhanced a suitable solution improve recovery. One challenge estimation properly model complex fracture geometries which are often assumed be planar limitation local grid refinement approach. More flexible methods like use unstructured grids can...

Summary Millimeter-sized (10 μm–mm) preformed particle gels (PPGs) have been used successfully as conformance-control agents in more than 5,000 wells. They help to control both water and CO2 production through high-permeability streaks or conduits (large pore openings), which naturally exist are aggravated either by mineral solution a high injection pressure during the flooding process. This paper explores several factors that can an important impact on injectivity plugging efficiency of...

Accurate placement of multiple horizontal wells drilled from the same well pad plays a critical role in successful economical production unconventional gas reservoirs. However, there are high cost and uncertainty due to many inestimable uncertain parameters such as reservoir permeability, porosity, fracture spacing, half-length, conductivity, desorption, spacing. In this paper, we employ response surface methodology optimize maximize Net Present Value (NPV) with numerically modeling...