Xing Qin

Sinopec (China)

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Deli Gao

China University of Petroleum, Beijing

Yongsheng Liu

China University of Geosciences (Beijing)

Bao Kui Gao

China University of Petroleum, Beijing

Yan-Long Zhao

Beijing University of Technology

Zijun Dou

China University of Geosciences (Beijing)

Hong Qiang Zhang

Hebei Provincial Communications Planning, Design and Research Institute Co., Ltd. (China)

Xuan Han

Nanjing University of Chinese Medicine

Jiansong Zhang

North China University of Science and Technology

Wei Wang

China National Petroleum Corporation (China)

Wei Wang

Beihang University

Cooperative Institutions

China University of Petroleum, Beijing

Chinese Academy of Sciences

Sinopec (China)

Ministry of Natural Resources

China University of Geosciences (Beijing)

Beihang University

University of Chinese Academy of Sciences

Jilin University

University of Science and Technology Beijing

State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation

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Investigating the Jet Comminuting Process in Cuttings Transport by Coupling the CFD/DEM Method and Bonded-Particle Model

SPE Journal (2019)

Yongsheng Liu Deli Gao Xin Li Xing Qin He Li

Summary Jet comminuting technology has proved to be an effective means of solid particle pulverization, and current research attempts to introduce it for drilling work to reduce cuttings size, because smaller cuttings are easy to circulate out of the bottom, thus can effectively prevent the formation of cuttings bed, especially in horizontal drilling. In this paper, the feasibility of cuttings’ comminution by jet is studied by means of numerical simulation with secondary development. The coupling analysis methods—including the computational–fluid–dynamics/discrete–element–model (CFD/DEM) modeling for the interaction between fluid and cuttings and the particle replacement and bonding modeling for cuttings breakage—are used to characterize the jet comminuting process of cuttings. Input parameters of simulation are reliable and verified by uniaxial compression tests. Case studies presented here indicate that cuttings can be considerably accelerated by 20 to 30 m/s through the throat, which provides a good effective speed for the cuttings. After being accelerated by the fluid and crushed with the target, the vast majority of cuttings results in smaller debris. Also, increasing the inlet speed affects the crushing efficiency. The inclination of the target at near 65° shows good results. This paper proposes a new perspective to introduce the jet comminuting technique for drilling operations, and its findings could help in guiding engineering design in the future.

Cutting

Comminution

Drill cuttings

Particle (ecology)

10.2118/188917-pa

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Citations (16)

In-situ observation of martensitic transformation in Cu-Al-Mn cryogenic shape memory alloy

Fusion Engineering and Design (2017)

Yu Lei Xing Qin Farong Wan Pingping Liu Liubiao Chen

Diffusionless transformation

10.1016/j.fusengdes.2017.05.083

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Citations (9)

Feasibility Analysis of Reverse Sealed Testing String in HPHT Wells

Applied Mechanics and Materials (2014)

Bao Kui Gao Wei Wang Xing Qin

To solve problems met in an offshore High-Pressure High-Temperature (HPHT) well testing, a new technology is put forward—placing seal bore extension above permanent packer, and the upper landing tools being connected with seal bore extension through shear pins. This method gives a reverse position of seal bore extension compared with conventional way in which seal bore extension is below permanent packer. So, the feasibility must be considered. Two technological procedures, testing before cutting pins and testing after cutting pins, are discussed, and the highlight is on axial force and deformation of testing string at crucial moments. Results indicate that this new technology is feasible. Of the two technological procedures, axial force is the key factor when testing before cutting pins and axial deformation is the key factor when testing after cutting pins. Conclusions have been used in an offshore HPHT well testing design.

Position (finance)

10.4028/www.scientific.net/amm.556-562.2761

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Citations (0)

Optimal Design of Deviation-Correction Trajectory Considering Inter-Well Interference

Zijun Dou Xing Qin Yongsheng Liu Jiansong Zhang Qingsheng Meng

Abstract In the process of shale gas mining, if the actual well deviates from the planned trajectory, significant inter-well interference will occur. Therefore, in order to reduce production loss, operators want to get back on the planned trajectory economically. To obtain the best deviation-correction trajectory, an optimization model considering inter-well interference was established. Firstly, the function relation between production envelope and deviation distance is constructed to calculate the production loss. Then, based on the deviation-correction trajectory design, the deviation distance under different curvature trajectory is obtained. Finally, the production loss of different trajectory is obtained, and a new multi-objective optimization model for deviation-correction trajectory is established. Based on the field data of Fuling shale gas area in China, the established model is verified. The results show that the smaller the curvature value is, the greater the production loss occurs. When the curvature value exceeds 10.8°/30m, the production loss value remains minimal. With the same production loss, the longer the production time leads to the greater well profile energy. When the optimization objectives are considered comprehensively, a trajectory with lower well profile energy and higher production can be obtained. It is concluded that the established model can not only reduce the probability of drilling accidents but also achieve better shale gas production. This study fully considers various factors affecting horizontal well in shale gas area, which can provide theoretical guidance for the design of deviation-correction trajectory.

Trajectory Optimization

10.2118/209254-ms

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Design of Self Swellable Casing Centralizer for Zonal Isolation in Petroleum Wells - A Utility Model of Well Completion Tool

Advanced materials research (2012)

Fei Yin Bao Kui Gao Xing Qin Xuan Han Hong Qiang Zhang

In view of the problem that fluid channeling between zones resulting from poor quality of cement sheath, a new casing centralizer is designed. The centralizer can make casing string in position as usual and seals micro-channels by the oil/water swellable rubber. Swellable rubber slices are inlaid in centralizer edges to add sealing efficiency. In order to seal diversion trenches effectively, axial moveable rubber bars are designed. During slurry injection, rubber bars are pushed upwards by differential pressure to open the flowpathes; after displacement, rubber bars reset under spring force. So, a circular sealing strip is formed by rubber slices and rubber bars for zonal isolation. In the paper, structure and working principle of this tool are described, materials and components are matched, structure strength is calculated, and the feasibility of the new tool is discussed.

Centralizer and normalizer

Oil well

Helix angle

10.4028/www.scientific.net/amr.524-527.1372

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Extended Reach Analysis of Coiled Tubing Assisted Radial Jet Drilling

SPE/ICoTA Well Intervention Conference and Exhibition (2020)

Xing Qin Mao Jun Jiapeng Liu Yan-Long Zhao Long Wu

Abstract Radial jet drilling technology is an economic and efficient method to enhance oil and gas recovery by drilling several lateral micro-holes from a vertical main borehole. The micro-holes drilled by high-pressure hydraulic energy can improve the contact area between wellbore and reservoir. The maximum extended reach of lateral micro-hole is a key parameter to evaluate the effect of radial jet drilling as the production increases with the length of lateral holes. However, the maximum extended reach of radial jet drilling reported has not been studied adequately. In this paper, we have established a new model which combines hydraulic friction and mechanical friction to analyze the extended reach of radial jet drilling. The results show that the flow rate is a main influence factor affecting the flexible hose extended reach which increases with the growth of flow rate. The outlet angle of deflector has a great effect on the extended reach especially at high flow rate, while the turning angle has little effect on extended reach. This work provides a systematic method including hydraulic and deflector optimization for the design of radial jet drilling to help develop the adjacent satellite oil & gas reservoirs.

Directional Drilling

Wellbore

10.2118/199841-ms

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Citations (2)

Rock Image Segmentation Based on Improved Back Propagation Neural Network

Xing Qin Yan-Long Zhao

Abstract Image segmentation is an important basis for extracting the structure characteristics of the rock. In order to solve the problem that the traditional image segmentation method does not segment the rock image accurately, the genetic algorithm is used to optimize the traditional back propagation (abbreviated as BP) neural network image segmentation method. The features of the rock image domain are extracted, and the training samples are further corrected. Using the improved back propagation neural network rock image segmentation method, the rock image is segmented for three aspects: connected domain, local domain and edge domain. The calculation results compared with ImageJ software and traditional BP neural network show that under the condition of small sample size, the improved BP neural network not only can autonomously learn the whole connected structure, local domain structure and edge structure in the rock image, but improve the accuracy and speed of the BP neural network for rock image segmentation.

Backpropagation

Segmentation-based object categorization

10.56952/arma-dfne-22-0068

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Mechanical Impact Effects of Fluid Hammer Effects on Drag Reduction of Coiled Tubing

Journal of Energy Resources Technology (2021)

Yongsheng Liu Xing Qin Yu‐Chen Sun Zijun Dou Jiansong Zhang

Abstract Aiming at the oscillation drag reduction tool that improves the extension limit of coiled tubing downhole operations, the fluid hammer equation of the oscillation drag reducer is established based on the fluid hammer effect. The fluid hammer equation is solved by the asymptotic method, and the distribution of fluid pressure and flow velocity in coiled tubing with oscillation drag reducers is obtained. At the same time, the axial force and radial force of the coiled tubing caused by the fluid hammer oscillator are calculated according to the momentum theorem. The radial force will change the normal contact force of the coiled tubing, which has a great influence on frictional drag. The results show that the fluid flowrate and pressure decrease stepwise from the oscillator position to the wellhead position, and the fluid flowrate and pressure will change abruptly during each valve opening and closing time. When the fluid passes through the oscillator, the unit mass fluid will generate an instantaneous axial tension due to the change in the fluid velocity, thereby converting the static friction into dynamic friction, which is conducive to the extend limit of coiled tubing.

Oscillation (cell signaling)

10.1115/1.4051302

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Citations (3)

Gas and Water Rate Forecasting of Coalbed Methane Reservoirs Based on the Rescaled Exponential Method

Journal of Energy Resources Technology (2020)

Xiao Guo Tong‐Yi Zhang Di Dejia Xing Qin Yujia Zhai

Abstract The traditional production data analysis (PDA) techniques for gas wells largely relied on the implement of pseudo-functions and related type curve methods. Recently, Ye and Ayala (2012 “A Density Diffusivity Approach for the Unsteady State Analysis of Natural Gas Reservoirs,” J. Nat Gas Sci. Eng., 7, pp. 22–34.) proposed a new rescaled exponential method which can successfully capture the behavior of gas well under boundary-dominated flow (BDF) conditions with the density-based parameters. In this paper, this rescaled exponential method is extended in coalbed methane (CBM) reservoirs by accounting for the two-phase flow behavior, and the variable permeability characteristics in the coal seams that caused by mechanical compression, desorption shrinkage, and the desorption effect. The two-phase rescaled exponential solution for CBM reservoir is derived by modifying the definition of two-phase pseudo-pressure and total compressibility. The proposed rescaled method can evaluate reserve in a convenient and accurate way. Results show that the proposed modification of the original rescaled exponential approach can successfully predict the production of CBM reservoirs compared with the results of commercial numerical simulator (GEM-CMG) and production data of the field cases on the condition of constant bottom hole pressure.

Coalbed Methane

10.1115/1.4048504

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Citations (5)

Investigation on the Critical Flow Rate of Cuttings Transport in Coiled Tubing Sidetracking by Using a CFD-DEM Coupled Model

Arabian Journal for Science and Engineering (2022)

Qingsheng Meng Yongsheng Liu Xing Qin Zijun Dou Jiansong Zhang

Wellbore

Cutting

Particle (ecology)

Drill cuttings

10.1007/s13369-022-07355-7

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Citations (2)