A5100343531- Hydraulic Fracturing and Reservoir Analysis
- Drilling and Well Engineering
- Oil and Gas Production Techniques
- Nonlinear Partial Differential Equations
- Hydrocarbon exploration and reservoir analysis
- Tunneling and Rock Mechanics
- Advanced Mathematical Physics Problems
- COVID-19 epidemiological studies
- Statistical Distribution Estimation and Applications
- Statistical Methods in Clinical Trials
- Advanced Mathematical Modeling in Engineering
- Geological Studies and Exploration
- Granular flow and fluidized beds
- Geoscience and Mining Technology
- COVID-19 Pandemic Impacts
- Grouting, Rheology, and Soil Mechanics
- Reservoir Engineering and Simulation Methods
- Statistical Methods and Bayesian Inference
- Arsenic contamination and mitigation
- Navier-Stokes equation solutions
- Advanced Topics in Algebra
- Aluminum toxicity and tolerance in plants and animals
- Fixed Point Theorems Analysis
- Graph theory and applications
- Cyclone Separators and Fluid Dynamics
Central South University
2025
Central South University of Forestry and Technology
2025
Southwest Petroleum University
2007-2024
Sichuan University of Science and Engineering
2013-2024
Renmin University of China
2022
China University of Petroleum, East China
2022
Central China Normal University
2022
Guangzhou Center for Disease Control and Prevention
2020
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation
2007-2019
University of Florida
2017
Abstract In the process of drilling with water‐based fluid, polymer plugging agent is very important to solve problem wellbore instability in formation micropores and microfractures. this study, N ‐isopropyl acrylamide 2‐acrylamide‐2‐methylpropanesulfonic acid were grafted onto surface SiO 2 modified by vinyl trimethoxysilane reverse suspension polymerization reaction, a heat‐sensitive was synthesized. The structure analysis showed that synthetic material target product, particle size 49.665...
The elemental sulfur corrosion resistance and mechanisms of nickel-based alloy 825 at high temperature pressure are still missing. This work investigates the in CO2-H2S-containing environment using weight loss measurement, surface characterization in-situ electrochemical techniques including noise, impedance spectroscopy as well polarization curves. results show that absence hardly corrodes containing 0.5 MPa CO2 1.6 H2S 100 °C, since passive film on substrate could offer an enough...
From 11 March to 6 July 2020, a total of 268 imported cases COVID-19 from abroad were confirmed in Guangzhou. 74% the detected during customs inspection and 19% under centralized quarantine. We advocate for legally enforced quarantine monitoring quarantined persons.
Proppants are one of the key materials for hydraulic fracturing, whose main role is to support fractures and create a channel through which oil gas can flow. The nature proppants most talked about feature besides their cost, example, sphericity, turbidity, particle size, or strength. porosity, permeability, fracture conductivity in also indicators measure performance them. These usually obtained physical experiments. However, experimental results often differ depending on scheme. Different...
MSE is an important parameter in drilling process as it determines efficiency. Therefore, accurately predicting the during and real-time adjusting parameters to enhance efficiency have been persistent research topics. In this paper, based on Log Data, including WOB, ROP, RPMX other parameters, compares ability of six machine learning methods predict MSE. The findings indicate that CNN-LSTM-Attention model combines spatial feature extraction capability CNN temporal sequence dependency LSTM,...
In recent years, shale gas production horizontal well types mainly include conventional well, highly deviated and scoop-shape well. For the sake of construction decision making, it is necessary to study these three wells from aspects drag torque characteristic, weight on bit transferring efficiency, key hole sections or links extreme penetration length. this paper, were taken as objects. Their torque, load transfer extended reach drilling explored based dynamic model full string simulation...
This paper established a triple porosity physical model in rectangular closed reservoirs to understand the complex fluid flowing mechanism and production behavior of multifractured horizontal wells shale gas reservoirs, which is more appropriate for practical situation compared with previous ones. According seepage theory considering adsorption desorption process stable state, rate well producing at constant wellbore pressure was obtained by utilizing methods Green’s source function...
Calculating the absolute open flow potential timely and investigating production capacity so as to adjust working system of wells is one main means effectively recovery gas reservoirs during intermediate late development stage. In order obtain accurately, a new method which utilized single steady point was proposed in this research, based on deliverability formula well pseudo-steady state with pseudo-pressure form. The influence factor B binomial productivity equation caused by changed...
Adding nanoparticles in a drilling fluid can aid the sealing of nanopores borehole wall rock and mud cake; this way, filtrate loss be reduced is stabilized.In work, spectrophotometric method was used to study effect dispersants on calcium carbonate nanoparticles.The best dispersion achieved at cetyltrimethyl ammonium bromide (CTAB) concentration 4 wt.%,dispersing time 45 min, pH value 8 stirring speed 900 rpm.The structure analysis showed that adsorption layer formed surface after CTAB...
Let $\mathcal{U}(n,g)$ and $\mathcal{B}(n,g)$ be the set of unicyclic graphs bicyclic on $n$ vertices with girth $g$, respectively. $\mathcal{B}_{1}(n,g)$ subclass consisting all two edge-disjoint cycles $\mathcal{B}_{2}(n,g)=\mathcal{B}(n,g)\backslash\mathcal{B}_{1}(n,g)$. This paper determines unique graph maximal signless Laplacian spectral radius among in $\mathcal{B}(n,g)$, Furthermore, an upper bound extremal for are also given.
The key performance parameters of proppant are mainly the crushing rate and fracture conductivity, which usually evaluated using physical experimental methods. However, testing method for conductivity has limitations, such as its long time-consumption, high costs, instability, even presence large errors in results under same conditions. purpose this paper is to propose a calculation that can replace experiments. Firstly, we analyze random deterministic phenomena contact relationship between...
Chaos and its synchronization are key to chaotic secure communication. The global of Chua's circuits via piecewise linear feedback control is investigated in this paper. A master-slave scheme with presented at first. Based on scheme, some sufficient criteria for proved optimized. effectiveness the obtained illustrated by numerical simulations.
We investigate the monic complex-coefficient polynomial of degree n, f z : n a n-1 • 0 in complex variable and obtain new annular bound for zeros , which is sharper than previous results has clear advantages judging Schur stability difference equations.In addition, examples are given to illustrate theoretical result.
This paper considers Bayesian multiple testing under sparsity for polynomial-tailed distributions satisfying a monotone likelihood ratio property.Included in this class of are the Student's t, Pareto, and many other distributions.We prove some general asymptotic optimality results fixed random thresholding.As examples these results, we establish several procedures literature appropriately chosen false discovery rate levels.We also show by simulation that Benjamini-Hochberg procedure with...
This paper considers Bayesian multiple testing under sparsity for polynomial-tailed distributions satisfying a monotone likelihood ratio property. Included in this class of are the Student's t, Pareto, and many other distributions. We prove some general asymptotic optimality results fixed random thresholding. As examples these results, we establish several procedures literature appropriately chosen false discovery rate levels. also show by simulation that Benjamini-Hochberg procedure with...