Water is ubiquitous within organic-rich shale in cases of connate water occurrence and during hydraulic fracturing treatment. Understanding multiphase transport behaviors organic nanopores crucial for the efficient development gas reservoirs. However, current studies have predominantly focused on single-phase or two-phase ideal graphite nanopores, leaving understanding processes realistic kerogen-based limited. In this study, we conducted molecular dynamic simulations to investigate through...

Spontaneous imbibition in microchannels is a critical phenomenon various industrial applications, such as enhanced oil recovery and microfluidic systems. One of the key factors influencing process dynamic wetting effect, which governs interaction between liquid solid surfaces. This paper improves original pseudopotential model for interfluid forces by coupling it with Peng-Robinson equation state. The model's accuracy verified through thermodynamic consistency checks, simulations gas-liquid...

Multi-stage hydraulic fracturing is a widely used technology in the development of shale oil and gas reservoirs that creates artificial fractures forms fracture networks enhance fluid flow within reservoirs. A well-designed network can significantly production performance wells, thereby improving recovery To achieve this, understanding individual crucial, as it provides valuable insights for refining subsequent designs, ultimately leading to an optimized design. At present, numerical...

During the development of shale gas, various issues such as low individual well production, rapid decline, limited reservoir control, and recovery rates have arisen. Enhancing gas has consistently been a focal point challenge within industry. Therefore, this paper employs molecular dynamic (MD) simulation methods to study adsorption diffusion characteristics CH4/CO2 at different temperatures mixing ratios. It compares effects temperature molar ratio changes on selectivity coefficient,...

Deep marine shale gas reservoirs are extremely rich in the Sichuan basin China. However, due to situ conditions with high temperature and pressure (HTHP), particular reservoir being usually much higher than test pressure, it is difficult accurately clarify adsorption behavior, as seepage theory plays an important role reserves evaluation. Therefore, three kinds of sorbent, including illite, quartz kerogen, two simulation methods, containing grand canonical ensemble Monte Carlo method...

Horizontal well drilling and multi-stage hydraulic fracturing technologies are at the root of commercial shale gas development exploitation. During these processes, typically, a large amount working fluid enters formation, resulting in widespread water-rock interaction. Deeply understanding such effects is required to optimize production system. In this study, mechanisms interaction associated responses fabric systematically reviewed for fluids as neutral fluids, acid alkali oxidative...

China has abundant shale gas resources with good exploration value and development potential, making it a recent hotspot for development. It is widely agreed that large-scale hydraulic fracturing essential reservoir enhancement in formations. However, the evolution of fractures during highly complex, necessitating research on influence various factors vertical propagation fractures. Based geological engineering parameters from Luzhou block southern Sichuan, this study employed finite element...

Insufficient consideration of the complex morphology hydraulic fractures (HF) and heterogeneous physical properties fractured reservoirs in seepage models can result unreliable well testing analyses. The fractal porosity permeability (FPP) model provides an effective method for characterizing reservoir heterogeneity near-wellbore zone. However, its application to scenarios involving irregularly-shaped fracture networks multiple clusters is challenging due lack spatial symmetry. To address...

This paper is the result of team’s hard work, which delves into correlation functions in proton-proton and PbPb(Lead-Lead) collisions, scrutinizing their relevance formation quark-gluon plasma. project first simulated these high-energy collisions generated a comprehensive dataset PbPb(Proton-Proton) interactions. The entire analysis designed around task calculating azimuthal pseudorapidity functions, wish to compare differences similarities between two collision types. Also delved as...

In the manufacturing process of a specific type conical cylinder, high-frequency argon arc welding is employed for butt welding. The uncertainty weld position relative to gun results in excessive manual labor during production, leading suboptimal product qualification rates; Consequently, implementation fusion laser seam tracking automated control system was initiated. This utilizes PLC gather various sensor data signals, servomotors, valves, and motors, thereby establishing comprehensive...

Abstract Crushing ratio and fracture conductivity are two key indicators for proppant evaluation. The most common way to evaluate these is physical testing, but testing costly time‐consuming, the results unstable. Therefore, a method calculating proppant‐crushing proposed replace repetitive experiments. However, in past attempts, only mathematical models using same particle size have been established, while particle‐size distribution actual arrangement within certain numerical range. order...

It is of great significance to clarify the adsorption law shale gas under in-situ conditions for development deep marine reservoirs. However, temperature and pressure in reservoirs are far higher than those range normal experiments, so characteristics high-pressure section have not been revealed. In this paper, we construct a kerogen model which conforms real samples by using molecular simulation technology, simulate methane at high (HTHP) conditions. The HTHP influence primary water...

Abstract Due to the emissions of greenhouse gasses, climate change has greatly threatened people's living environment, urging reduce CO2 in atmosphere and promote carbon-free energy structures. Large-scale underground H2/CO2 storage emerges as a promising technology for H2 seasonal supply reduction. The depleted shale gas reservoir presents favorable site due its abundance nanopores, which inherently prevents leakage ensures long-term storage. However, coexistence with original water...

After a shale gas reservoir is fractured, hydraulic fractures interweave with natural to form fracture network. Numerical simulation based on the continuous network model relatively economical and convenient method predict morphology size in field application. However, some important factors, such as height variation filtration loss, have not been considered past models. Therefore, this paper aimed at establishing novel improve accuracy. Firstly, established judge whether develop or not....

In this paper, the adsorption experiments of CO2, N2 and CH4 in shale were carried out view high temperature pressure environment influence artificial fractures actual reservoirs. On basis, continuous gas injection pure components CO2 two mixed gases out. The results show that process experimental shows strong monolayer characteristics, increase content will reduce competitive capacity CO2. When is injected at 0.01cc/min, existence cracks cause to break through quickly production. As rate...

At present, tight oil and gas reservoirs exploitation mainly adopts water (H2O)-based fracturing technology, which not only consumes huge amounts of water, but also restricts the process industrial in water-scarce areas. In addition, clay will expand contact with resulting poor reservoir stimulation effect low recovery factor. order to avoid problems caused by hydraulic fracturing, carbon dioxide is used replace so as achieve purpose stimulation. While transforming reservoir, CO2 technology...