Water-alternating-gas (WAG) injection is recommended as a means of improving gas mobility control. This paper describes series coreflood tests conducted to investigate the potential for continuous and WAG in ultra-high water-cut saline reservoirs. The mechanisms immiscible water-alternating-nitrogen on residual oil distribution are analyzed, pore-scale analysis conducted. effect parameters recovery efficiency also evaluated. Coreflood results show that tertiary significantly higher using...

This paper presents a new semi-analytical solution and the related methodology to analyze pressure behavior of multi-branch wells produced from natural gas hydrates. For constant bottom-hole production, transient flow is obtained by Laplace transforms. The interference among various branches investigated using superposition principle. A simplified form proposed model validated published analytical solutions. complete profile can be divided into nine distinct regimes: wellbore storage skin,...

The regulation of the seasonal energy supply for natural gas and storage fossil are important to society. To achieve it, storing a large amount in porous underground media is one government’s choices. Due successful lesson learned from oil industry, has been regarded as most potential long−term method. In this paper, we developed new workflow evaluate performance reservoir−type (UGS). theoretical background includes correction average formation pressure (AFP) deviation factor by error theory...

Abstract Due to high energy density, clean combustion products and abundant resources, natural gas hydrates (NGHs) have been regarded as an important source with the potential for large-scale development utilization. However, pilot tests in NGHs show that their production rates are far below commercial needs. Multilateral well technology may lead a solution this problem because it can dramatically expand drainage area of wells. This paper presents practical rate transient analysis...

Abstract Underground natural gas storage (UGS) is key to achieving carbon neutrality and it also a potential solution the seasonal imbalance between supply demand. To store or withdraw large amount of within specified time, wells in UGS projects often need have high continuous injection withdrawal capacities. High rates lead uneven pressure distributions substantial well interference. This paper proposes an analytical model investigate impact interference on transient behavior wells. We used...

This paper presents a Tracer Liquid Image Velocimetry (TLIV) for multi-layer radial flow in bioreactors used cells cultivation of tissue engineering. The goal this approach is to use simple devices get good measuring precision, specialized the case which uniform level fluid shear stress was required while velocity varied smoothly.Compared widely Particles (PIV), method adopted bit liquid as tracer, without need laser source. Sub-pixel positioning algorithm overcome adverse effects tracer...

Low permeability oil reservoir resources are rich and their efficient development is considered an important way to solve energy security issues. However, the process of low reservoirs faced with challenges insufficient natural rapid production decline. The high-pressure water injection technology a method that relies on large-volume inject fluid into replenish energy. It as technical means quickly formation This study focuses capacity for reservoir. Firstly, fluid-structure interaction...

The development of low-permeability and tight oil reservoirs is challenged by insufficient natural energy rapid production decline. Fracturing-flooding a technique that relies on high-pressure large-volume fluid injection to replenish reservoir energy, making it significant method for rapidly boosting formation energy. To evaluate the replenishment effect fracturing-flooding technology in reservoirs, this study proposes semi-analytical quick calculation. This approach employs dimensionless...

To achieve the goal of decarbonized energy and greenhouse gas reduction, underground storage (UGS) has proven to be an important source for regulation natural supply. The special working conditions in UGS cause offset vertical wells easily interfere with target wells. current well testing methodology assumes that there is only one well, interference from ignored. This paper proposes a solution analysis method adjacent by analytical theory. model obtained constant rate Laplace transform...

Complex fracture networks generated by fracturing treatments and the gas–water flow have intensified well interference in shale gas reservoirs. In this paper, a high-precision numerical model is developed to capture effects of on pressure transient behaviors multi-horizontal-well pads. The unstructured Voronoi grid approach employed discretize physical model. model's accuracy verified through published analytical solutions. findings reveal that pad reservoirs can exhibit up ten distinct...

Perfusion bioreactors with multilayer circular parallel plates scaffold have the potential to provide a considerable scalability in cells' cultivation for tissue engineering. By now, relatively little attention has been focused on uniform distribution of fluid shear stress (FSS) among plates. However, magnitude FSS significant effect both proliferation and differentiation cells. This paper analyses relationship between structural parameters then presents an approach optimize flow field...

The study presents a method to achieve subject-ventilator synchronic pressure supply for non-invasive ventilator (NIV) used obstructive sleep apnea syndrome (OSAS), solely through controlling the blower instead of using expiratory relief valves. controller air flow signal distinguish inspiratory and phases, fast auto-forecast (AF) algorithm predict current duration based on respiration periods distinguished previously. Then in patient's late inspiration mechanical state was triggered release...

Abstract Recently, there have been many attempts to model the stimulated reservoir volume in unconventionls. However, most researches only focused on intersecting hydraulic or natural fractures and effects of are ignored. In this study, we developed a new method that uses an effective semi-analytical unconventional reservoirs. Large-scale fracturing not forms but also activates large number near-well region. To best our knowledge, multiwell horizontal pad modeling methods ignore physics...

Abstract Due to high energy density, clean combustion products and abundant resources, natural gas hydrates (NGHs) have been regarded as an important source with the potential for large-scale development utilization. However, pilot tests in NGHs show that their production rates are far below commercial needs. Multilateral well technology may lead a solution this problem because it can dramatically expand drainage area of wells. This paper presents practical model multilateral horizontal...

Abstract Recently, many attempts have been made to estimate carbon storage capacity of depleted shales. In this paper, based on flow regime diagnosis and transient analysis, a quick reasonable semi-analytical method for estimating CO2 shales is introduced. Our has the capability by considering effective diffusion, gas adsorption, stress-sensitivity phenomenon permeability. By combining Laplace transforms, Pedrosa's substitution, Stehfest numerical inversion, seepage model an injection well...

Abstract Underground gas storage (UGS) is an important source for regulating natural supply. The large injection or production rate causes well interference in UGS to be particularly serious. Current testing workflows assume a single well. This paper proposes novel multi-well solution and related analysis method analyze targeted performance system. On the basis of constant solution, Laplace transforms, superposition principle, we obtained solutions transient flow. A systematic validation...