检索结果-内蒙古大学图书馆

3rd International Conference on Advanced Algorithms and Signal Image Processing, AASIP 2023

作者： Cai, Jiati Yu, Tong University of Electronic Science and Technology of China China CNPC Engineering Technology R&D Company Ltd China

ISBN: (纸本)9781510668522

With the enhancement and enrichment of social media, cross network node alignment algorithms are playing an increasingly important role in interest recommendation and security protection. However, the performance of the same user in different online social networks platforms may differ due to the heterogeneous characteristics of the platform or unclear personal characteristics, which correspondingly poses many challenges. Existing cross network node association methods are restricted by the forgery of attributes and the time complexity of processing user generated content, and the overall effect is not ideal. This article mainly proposes a cross network node alignment algorithm based on friend following relationships and username similarity in different networks in online social networks. Using social network relationships to generate model vectors for two networks, and generating transformation matrices based on training sets, calculate confidence based on friend relationships for test samples, and organically combine the similarity of user names between the two networks to make associated user predictions, thereby linking the accounts of entities in the two networks and achieving node alignment. Experimental results indicate the node alignment method can achieve satisfactory performance. © COPYrIGHT SPIE. downloading of the abstract is permitted for personal use only.

关键词： Social networking (online)

来源：评论

学校读者我要写书评

暂无评论

research on the pollution and damage mechanism of drilling fluid on casing during ultra-deep well drilling process

引用

Petroleum Science 2025年第03期 1234-1251页

作者： Han-Xuan Song Shi-Ling Zhang Xiang-Wei Chen Kiyingi Wyclif Ji-Xiang Guo rui-Ying Xiong Li Wang Unconventional Petroleum Research Institute China University of Petroleum State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum (Beijing) CNPC Engineering Technology R&D Company Limited

In drilling ultra-deep wells, the drilling fluid circulation usually causes erosion damage to downhole casing and drilling tools. However, the extent and process of this damage to the downhole tools is intricate and less understood. In order to systematically evaluate and clarify this damage process for different types of drilling fluid contamination, this research uses a high-temperature drilling fluid damage device to simulate the damage caused to the casing/drilling tools by various drilling fluid under a field thermal gradient. The results show that the drilling fluid residues are mainly solid-phase particles and organic components. The degree of casing/tool damage decreases with an increase in bottom hole temperature, and the casing/tool is least damaged within a temperature range of 150—180°C. Moreover,the surface of the casing/tool damaged by different types of drilling fluid shows different roughness, and the wettability of drilling fluid on the casing/tool surface increases with an increase in the degree of roughness. Oil-based drilling fluid have the strongest adhesion contamination on casing/drilling tools. In contrast, polysulfonated potassium drilling fluid and super-micro drilling fluid have the most potent erosion damage on casing/drilling tools. By analyzing the damage mechanism, it was established that the damage was mainly dominated by the abrasive wearing from solid-phase particles in concert with corrosion ions in drilling fluid, with solids producing many abrasion marks and corrosive ions causing a large number of pits. Clarifying drilling fluid's contamination and damage mechanism is significant in guiding the wellbore cleaning process and cutting associated costs.

关键词：

来源：评论

学校读者我要写书评

暂无评论

development and Application of Automatic Feeding device for drilling Fluid Additive 12th

Development and Application of Automatic Feeding Device for ...

引用

12th International Field Exploration and development Conference, IFEdC 2022

作者： Xiao, Jian-Qiu Yang, Hui Wang, Ying Shao, Qiang Hu, Zhi-Jian Han, Fei CNPC Engineering Technology R&D Company Limited Beijing China CNPC Oilfield Technology Service Co. Ltd. Beijing China Equipment Department of Fourth Drilling Company BHDC Tianjin China

ISBN: (纸本)9789819919635

In order to improve the HSE level during drilling fluid preparation and maintenance, the first domestic multi-tank drilling fluid additive automatic feeding device was developed. It uses pneumatic conveying method to automatically convey powder drilling fluid additive to mud mixing system in a closed environment. The device can automatically complete various functions such as feeding, discharging, turning, and recycling with one key. The field application test proves that according to the drilling fluid regulation requirements, the drilling fluid additive is accurately transported to the mud mixing system according to the set parameters through automatic operation in a closed environment, and the automatic and precise regulation of the drilling fluid and zero leakage, zero emission and zero pollution are realized. It effectively solves the problems of traditional manual feeding methods, such as low operation efficiency, uneven mixing of drilling fluid additive, low feeding accuracy, great human harm, high environmental pollution, and material waste, and significantly improves the automation of drilling rigs and the level of field HSE. The research has broken through difficult technologies such as automatic conveying of multi-character materials, high-efficiency material-gas separation, dust collecting and gas removal, and batching control. Compared with similar products at home and abroad, the comprehensive performance has reached the international advanced level. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2023.

关键词： Feeding

来源：评论

学校读者我要写书评

暂无评论

Numerical analysis of fracture propagation behavior in hot dry rock during radial borehole fracturing 57

Numerical analysis of fracture propagation behavior in hot d...

引用

57th US rock Mechanics/Geomechanics Symposium

作者： Zou, Wenchao Huang, Zhongwei Sun, Yaoyao Wu, Xiaoguang Long, Tengda Huang, Pengpeng Yu, Huiyong China University of Petroleum-Beijing Beijing China CNPC Engineering Technology R&D Company Limited Beijing China Engineering Technology Research Institute of Xinjiang Oilfield Company Xinjiang China

ISBN: (纸本)9780979497582

radial well fracturing is a promising stimulation method, which shows great potential in addressing the issues suffere in enhanced geothermal system (EGS), such as poor connectivity and difficulty in controlling the fracturing paths. To determine th applicability of radial borehole fracturing in Hdr, a THM-FdEM coupling model for studying the fracture propagation behavior o radial borehole fracturing is established. Firstly, the reliability of the coupled THM model is validated by radial borehole fracturin experiments. Then, the effects of azimuth, number, length and spatial distribution of radial boreholes on fracture propagation behavio are analyzed. The results show that implementing radial borehole fracturing in Hdr can overcome the adverse effects of in-situ stress allowing fractures to expand in the desired direction. Increasing the number and azimuth of radial borehole while decreasing thei length can increase the angle of fractures deviating from the direction of maximum horizontal principal stress. In the case of double branch, a branch angle of 60°can result in stress interference between radial boreholes, inhibiting fracture propagation from the to of the radial borehole. The research findings of this study are expected to provide valuable guidance for the field application of radia borehole fracturing in Hdr geothermal reservoirs. © 2023 57th US rock Mechanics/Geomechanics Symposium. All rights reserved.

关键词： Boreholes

来源：评论

学校读者我要写书评

暂无评论

Intelligent Prediction and Key Factor Analysis to Lost Circulation from drilling data based on Machine Learning

Intelligent Prediction and Key Factor Analysis to Lost Circu...

引用

2022 International Conference on Computer Graphics, Artificial Intelligence, and data Processing, ICCAId 2022

作者： Wen, Guangyao Chen, Huailong Zhou, Tuo Gao, Chengwu Baletabieke, Bahedaer Zhou, Haiqiu Wang, Shan CNPC Amu Darya River Gas Exploration & Development Company Beijing102299 China CNPC Engineering Technology R&D Company Limited Beijing102206 China Beijing Chen Yu Jin Yuan Science and Technology Company Limited Beijing100010 China

ISBN: (纸本)9781510663350

Lost circulation during drilling wells is very detrimental since it greatly increases the non-productive time and operational cost, also seriously lead to wellbore instability, pipe sticking, blow out, etc... However, in the process of drilling wells, geological characteristics and operational drilling parameters all may have impacts to the lost circulation. This makes the establishment of the relations between the lost circulation and drilling factors very challenging. In this paper, we tested five different kernel function (linear, quadratic, cubic, medium Gaussian and fine Gaussian) derived support vector regression (SVr) models and four-layer artificial neural network (ANN). By combining their accuracy and time efficiency, the ANN is regarded as the optimal predictor of lost circulation. By training ANN using different combination of drilling features, we concluded that depth, torque, hanging weight, displacement, entrance density and export density are the key factors to accurate predict the lost circulation. The corresponding trained ANN network can achieve 99.2% accuracy and evaluate whether a drilling feature vector corresponds to lost circulation or not in milliseconds. © 2023 SPIE.

关键词： Multilayer neural networks

来源：评论

学校读者我要写书评

暂无评论

CGdS near-bit geosteering drilling system and its first application in Niger 7

CGDS near-bit geosteering drilling system and its first appl...

引用

7th International Conference on downhole Measurement and Control, ICdMC 2024

作者： Pan, Xingming Li, Jiran Sui, Yuan Tang, Yuzhe Zhang, Haibo Shi, Qian 1Beijing Petroleum Machinery Co. Ltd Beijing 102206 China 2CNPC Engineering Technology R&D Company Limited Beijing 102206 China

The Niger project is one of the important exploration and development cooperation projects of China National Petroleum Corporation in West Africa. The dibeilla N-1 block of Agadem oilfield in Niger faces challenges such as frequent interlayers and susceptibility to encountering faults during drilling. According to the deployment requirements of the plan, the block will be developed using a mixed well network of horizontal and vertical wells, and the upper sand body will need to be developed using horizontal wells. The dogleg angle of the inclined wellbore should be controlled within 2~4.5 (°)/30m, and the target thickness should be only 3m. Conventional guiding tools represented by MWd(Measurement While drilling) cannot achieve effective and efficient reservoir identification and trajectory adjustment in thin oil layers due to their zero length of around 10 meters. Therefore, a geological guiding tool that can achieve near drill bit measurement is needed. Therefore, in order to successfully complete the horizontal section drilling and guidance engineering, maximize the drilling encounter rate of high-quality reservoirs, communicate favorable layers to achieve oil reservoir benefit development, it is decided to use CGdS(cnpc Geological drilling System) near bit geological guidance tool to implement horizontal section drilling. The system is equipped with gamma, resistivity, and engineering parameter measurements at a distance of 3 meters from the drill bit, providing multiple basis for precise directional guidance of the formation. In the dibeilla N-1 block of Niger, a total of 6 wells were applied, with an average reservoir drilling encounter rate of 85.38% and a mechanical drilling speed of 12.31 m/h. The first application of this system overseas has provided valuable experience for similar domestic work. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Horizontal wells

来源：评论

学校读者我要写书评

暂无评论

research on dynamic Characteristics of Friction and drag reduction of Hydraulic Clutch 13th

Research on Dynamic Characteristics of Friction and Drag Red...

引用

13th International Field Exploration and development Conference, IFEdC 2023

作者： Xu, Zhao-Hui Fan, Jin-Chao Tian, Jialin Xiong, Chang-Qing CNPC Engineering Technology R&D Company Limited Beijing China National Engineering Research Center for Oil and Gas Drilling and Completion Technology Beijing China School of Mechanical Engineering Southwest Petroleum University Chengdu China

ISBN: (纸本)9789819702558

Bending sliding steering technology and rotary steering technology are two existing directional drilling technologies. A common technique for directional and horizontal wells is sliding steering. In the directional drilling process, the drill string is subjected to great resistance, resulting in low drilling efficiency and mechanical drilling speed, which severely limits the length of the horizontal section. Although rotary drilling can improve drilling efficiency, rotary guides are expensive to manufacture and use. In order to solve the problem of large friction generated during directional well sliding, a hydraulic coupling directional well drilling tool is proposed. The tool has the ability to adjust the torque transmitted from the upper drill string to the lower drill string, thereby continuously rotating above the drill string during the directional drilling phase, thereby reducing friction. Based on the borehole action model of the drill string and the rock action model of the drill bit, we established the dynamic model of the hydraulic clutch drill string system. Through evaluation based totally on the dynamic mannequin and actual drilling parameters, we reap the dynamic consequences of the drill string gadget with hydraulic clutch and evaluate it with the dynamic results of the drill gadget except without hydraulic clutch. The results show that the hydraulic grasp can efficiently minimize the friction of the drill string machine and suppress the stick-slip vibration at the drill bit. The results of this study further confirm that the use of hydraulic clutches can decrease the occurrence of friction during directional drilling. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： drill strings

来源：评论

学校读者我要写书评

暂无评论

Simulation research on rock-Breaking Performance of PdC Cutter Under Composite Impact Based on discrete Element Method 57

Simulation Research on Rock-Breaking Performance of PDC Cutt...

引用

57th US rock Mechanics/Geomechanics Symposium

作者： Zhang, Heng Yang, Henglin Yuan, Guangjie Fu, Li Wang, Yuan Ni, Hongjian ren, Xianke Chen, Gang Wang, Zixin CNPC Engineering Technology R&D Company Limited Beijing China National Engineering Research Center of Oil & Gas Drilling and Completion Technology Beijing China Qingdao China

ISBN: (纸本)9780979497582

This paper introduces a PdC (Polycrystalline diamond Compact) cutting rock model loaded by spring-mass-damping system by dEM (discrete element method), and this model allows force boundary conditions in the vertical and horizontal directions of the PdC cutter. Therefore, the model can simulate the rock-breaking of PdC cutter under vertical, horizontal, and composite impact load. The influence of the component and frequency of the impact on the rock-breaking performance and force of the PdC cutter was investigated. Lower amplitude composite impact load or only increasing vertical impact load may lead to increase of the fluctuation of PdC cutter contact force and peak force value;Increasing the amplitude of composite impact load both in horizontal and vertical directions, or only increasing the amplitude of horizontal impact load, has a significant effect on suppressing the vibration of cutting, and can improve the cutting depth, reduce the contact friction, and reduce the MSE (mechanical specific energy) of rock breaking. The simulated rock crushing state show that under the composite impact, increasing the amplitude of horizontal impact load is beneficial to increase number and length of transverse cracks, which promotes the large volume rock spalling, and the effect of high-frequency composite impact on suppressing PdC cutter vibration is more obvious. © 2023 57th US rock Mechanics/Geomechanics Symposium. All rights reserved.

关键词： Loads (forces)

来源：评论

学校读者我要写书评

暂无评论

AdLM-LWd: Adaptive deep Learning Model for Lithology Identification from Logging- While-drilling data with Online Learning Mechanism

ADLM-LWD: Adaptive Deep Learning Model for Lithology Identif...

引用

New Trends in Computational Intelligence (NTCI), International Conference on

作者： Ziyun Zhao Wang Lin Lingzhi Jing Yumeng Tian Weihong Guo CNPC Engineering and Technology R&D Company Limited Beijing China

ISBN: (数字)9798331517021

ISBN: (纸本)9798331517038

Accurate lithology identification from Logging-While-drilling (LWd) data is crucial for optimizing drilling operations and enhancing reservoir characterization in the oil and gas industry. However, the lack of standardized datasets and the need for real-time adaptability in varying geological environments pose significant challenges. This study addresses these issues through three key contributions. First, a comprehensive dataset for lithology identification is constructed, combining LWd features with corresponding lithology labels, providing a valuable resource for deep learning applications in this field. Second, a novel deep learning model is proposed, integrating 2d convolution and bidirectional LSTM to effectively capture both spatial and temporal features of LWd data. The model demonstrates high stability and performance across various metrics in extensive cross-validation tests. Lastly, an Adaptive Incremental Learning Algorithm (AILA) is introduced, incorporating online learning mechanisms and dynamic adaptation strategies to enhance the model's real-time adaptability. These advancements contribute to more accurate and adaptive lithology identification systems, which potentially improve real-time decision-making in drilling operations and lead to more efficient and cost-effective exploration and production processes.

关键词： deep learning Learning systems drilling Adaptation models Accuracy Incremental learning Heuristic algorithms Geology real-time systems data models

来源：评论

学校读者我要写书评

暂无评论

Field Measurement and retrieval research of Multi-physics Micro-measurement devices during the drilling Process in Oil and Gas Wells 30th

Field Measurement and Retrieval Research of Multi-physics Mi...

引用

30th International Conference on Computational and Experimental engineering and Sciences, ICCES 2024

作者： Li, Mu Wang, Hao Liao, Mao-Lin Yang, Yi CNPC Engineering Technology R&D Company Limited Beijing102206 China National Engineering Research Center of Oil and Gas Drilling and Completion Technology Beijing102206 China University of Science and Technology Beijing Beijing100083 China

ISBN: (纸本)9783031687747

While-drilling measurements are the primary means for oil and gas well engineers to obtain real-time downhole engineering parameters. Current single-point, dual-point, and intelligent drill-string multi-point measurement systems can achieve early detection of gas cut, leakage, and other conditions. However, these methods have drawbacks such as high usage costs and limited applicability. Micro-measurement devices based on Micro-Electromechanical Systems (MEMS) have emerged as a hot topic in recent years due to their ability to measure temperature, pressure, magnetic field, and dynamic parameters throughout the entire wellbore during mud circulation. These devices offer advantages such as small size, high measurement accuracy, fast data acquisition, cost-effectiveness, and strong applicability. In this study, bullet-shaped multi-physics micro-measurement device encapsulated with PdMS materials was developed and field retrieval tests were conducted. The functionality of parameter measurement under actual downhole circulation conditions was also tested. results showed that out of 14 micro-measurement devices deployed over a 30-min circulation and retrieval cycle, 6 were successfully retrieved, achieving a recovery efficiency of 42%. The retrieved micro-measurement devices successfully recorded angular velocity, acceleration, and temperature data during the circulation process. Finally, some issues encountered during field testing were identified and suggestions were proposed, which are of significant importance for the further development of this technology. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： drill strings

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：