检索结果-内蒙古大学图书馆

12th International Field Exploration and development Conference, IFEdC 2022

作者： Yang, Qiu-Yi Mao, Wei-Min Feng, Ze-dong Jia, Heng-Tian Geng, Biao Fan, Yi-Feng Xie, Xia CNPC Engineering Technology R and D Company Ltd Beijing China Qoiltech Company Ltd Wuxi China

ISBN: (纸本)9789819919635

A cross-screw motor near-bit gamma imaging and transmission system is introduced in this paper. It works stably in high-impedance medium conditions up to 175 °C, and greatly improves encounter rate of unconventional reservoir. The electromagnetic transmission model in high-impedance medium is established to carry out simulation calculations, optimize high-quality antenna system, and design cabin with strong vibration resistance and high wear resistance. A near-bit electromagnetic transmission system is developed and verified by laboratory and field drilling tests. The decoding accuracy rate could reach 100% with the conditions of air medium in laboratory, and the bit error rate of drilling operation is less than 5%. The field applications show that this system works well with stable transmission channel. The system effectively guides horizontal well operation, with a reservoir encounter rate of over 95%. The high-performance antenna system, high-reliable codec algorithm and high-strength cabin design ensure that the bit error rate is greatly reduced, and the geosteering in harsh environments is achieved, which has broad application prospects. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2023.

关键词： Bit error rate

来源：评论

学校读者我要写书评

暂无评论

Effect of mechanical vibration process parameters on the cement plugs properties for abandoned wells

引用

Petroleum Science 2023年第4期20卷 2428-2441页

作者： Hang-Ming Liu Yang-Ye He Ji-Fang Wan Lin Chen Xian-Zhong Yi Yuan-Hua Zhou Yu-Xian He Xiang-Gui Ming Lu ren Cooperative Innovation Center of Unconventional Oil and Gas Yangtze University(Ministry of Education&Hubei Province)WuhanHubei430100China School of Mechanical Engineering Yangtze UniversityJingzhouHubei434023China CNPC Engineering Technology R&D Company Limited Beijing102206China College of Safety and Ocean Engineering China University of Petroleum-BeijingBeijing102249China Engineering Technology Research Institute CNPC Bohai Drilling Engineering Co.Ltd.Tianjin300457China

A high-quality plug of the abandoned wellbore is considered an essential technical aspect of the oil and gas well abandonment technology system. This paper presents a method of active mechanical excitation to enhance the quality of wellbore plug barriers. An indoor simulation platform is developed, and the effects of different combinations of vibration frequency, amplitude and duration on the properties of the wellbore plug cement material are investigated. It is observed that the optimal combination of excitation parameters occurs at a vibration frequency of 15 Hz, a vibration time of 6 min, and a vibration amplitude of 3 mm. Compared with the condition without the vibration process, the cementing strength, compressive strength, and tensile strength of wellbore cement plug with the optimal mechanical vibration process could increase by 51%, 38% and 20%, respectively, while the porosity decreases by 5%. As determined by scanning electron microscopy of the set cement's microstructure, mechanical vibration effectively eliminates internal porosity and improves the set cement's density. The optimal excitation parameters obtained from the test can guide the design of the vibration plugging tool. The designed vibration plugging tool is simulated in the near field. The cement plug cementation quality tester tests the vibrating and non-vibrating samples, and the cementation ratio is calculated. The test results show that the average cementation ratio of vibrating samples is 0.89375, and that of non-vibrating samples is 0.70625, and the cementation quality is improved by 27%. It is concluded that it not only provides essential data for the design of mechanical vibration plug apparatus, on-site vibration plugs, and the development of operational specifications for vibration plugs, but also provides solid engineering guidance.

关键词： Plugging and abandonment Cement plug Vibration Mechanical properties Microstructure

来源：评论

学校读者我要写书评

暂无评论

Safe Speed-Up drilling technology for Ultra deep Well Based on Geology-engineering Integration 12th

Safe Speed-Up Drilling Technology for Ultra Deep Well Based ...

引用

12th International Field Exploration and development Conference, IFEdC 2022

作者： Chen, Chang-Chang Ji, Guo-dong Wang, Hai-Ge Huang, Hong-Chun Wu, Qiang Liu, Li CNPC Engineering Technology R and D Company Limited Beijing China CNPC Research Institute of Petroleum and Development Beijing China

ISBN: (纸本)9789819919635

Qiulitage tectonic belt in Tarim Basin has large reservoir burial depth and complex geological conditions, and challenges such as ultra deep, high temperature, high pressure and high stress lead to big problems related to well control safety, well construction timeliness and project quality. To solve these key technical problems that set barriers to the process of exploration and development, a set of drilling technology process geology-engineering integration is established with geomechanics as the bridge. And an integrated key drilling engineering technology for the safe speed up of ultra deep well was formed, integrating well location optimization, well trajectory optimization, stratum pressure prediction before drilling, stratum drillability evaluation, bit and speed-up tool design and optimization, so as to solve engineering problems. Combined with seismic data, logging data, structural characteristics, and lithology distribution characteristics, the rock mechanics data volume related to the 3d drilling resistance characteristics of the block was established for the first time, and the vertical and horizontal heterogeneity was quantitatively characterized, which provided a basis for bit design, improvement and optimization. Through field practice, the average drilling complexity rate was reduced from 12% to 4.6%, and the drilling cycle at 8500m depth was reduced from 326 days to 257 days, which were significantly better than those of the vertical wells deployed in the early stage without considering geology-engineering integration. It accumulated technology and experience for the efficient development of ultra deep complex oil and gas reservoirs. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2023.

关键词： Integration

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

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

Advanced 4d drilling dynamics Model Simulates downhole Vibration and Helps to Optimize in Preventing drill String Failure

Advanced 4D Drilling Dynamics Model Simulates Downhole Vibra...

引用

2024 SPE Asia Pacific Oil and Gas Conference and Exhibition, APOGCE 2024

作者： Zhang, Jiawei Wang, Qing du, Shiliang Zhuo, Lubin Liu, Wei Ling, Bo CNPC Engineering Technology R&D Company Limited Beijing China China National Oil and Gas Exploration and Development Company Limited Beijing China Drilling and Production Technology Research Institute PetroChina Qinghai Oilfield Company Gansu Dunhuang China

ISBN: (纸本)9781959025269

downhole vibration, such as backward or chaotic whirling, is one of the primary causes for drill string failure during drilling operation. Understanding drilling dynamics is crucial for determining the mechanism of vibration and fatigue accumulation so as to mitigate risk of drill string failure. drilling dynamics or vibration data can either be obtained from real-time measurement or simulation based on dynamics model, which plays a crucial role for drilling optimization in pre-drill planning phase. An advanced 4d drilling dynamics model, which considers the interaction between drill bit and formation, impact and friction between drill string and wellbore, constraints exerted on drill string and drill bit, is proposed to simulate the distribution and variation of 3d displacement, velocity, acceleration as well as the stress state of entire drill string within specified time period. This time domain model allows exploration of the full range of dynamics response under different drilling scenarios, which helps to optimize the performance and reliability of BHA as well as WOB/rPM selection. Moreover, drill string fatigue life prediction can also be achieved by combing simulated stress state and fatigue accumulation theory. Simulation shows that BHA with smaller- sized drill collar or fewer stabilizers are more susceptible to backward and even chaotic whirling while drilling. Also, inappropriate WOB/rPM combinations such as low WOB with high rPM could also cause the onset of severe lateral vibration. High frequency bending stress, mainly concentrated on BHA and caused by lateral vibration, is the main reason for rapid fatigue accumulation and continuous severe vibration could even result in drill string fatigue failure within hours. These findings helped to justify the 5 consecutive BHA failure and 1 washout while drilling the 171/2" wellbore with 7621 ft length of an ultra-deep well. Simulation also showed that downhole lateral vibration severity was significantly redu

关键词： drill collars

来源：评论

学校读者我要写书评

暂无评论

Fracture Geometries and Breakdown Pressures of Multi-Branch radial Borehole Fracturing Influenced by Horizontal Stress difference 57

Fracture Geometries and Breakdown Pressures of Multi-Branch ...

引用

57th US rock Mechanics/Geomechanics Symposium

作者： Yong, Yuning Guo, Zhaoquan Tian, Shouceng Wang, Tianyu Sheng, Mao Liao, Lulu Beijing China Beijing Petroleum Machinery Company Limited CNPC Engineering Technology R&D Company Limited Beijing China Sinopec Research Institute of Petroleum Engineering Beijing China

ISBN: (纸本)9780979497582

Multi-branch radial boreholes can be drilled and combined with hydraulic fracturing to efficiently stimulate tight gas reservoirs. This paper experimentally investigates how horizontal stress difference affects fracture geometry and breakdown pressure in multi-branch radial borehole fracturing by a true triaxial fracturing device. Six artificial rocks (395 mm ×395 mm ×395 mm) were cast for the experiments, which are divided into two groups by the azimuth of the radial borehole. The results show that fracture geometries are controlled by the rectification of a single radial borehole, the extrusion between the adjacent radial borehole row, and the deflection of the maximum horizontal stress. Fracture propagation is affected by the dynamic variation of the three effects. decreasing the stress difference is favorable for fracture propagation along the radial borehole axis, while it lifts the breakdown pressure. decreasing the azimuth lifts fracture extension distance parallel to the radial borehole axis and reduces the breakdown pressure. This research sheds light on the feasibility of radial borehole fracturing for reservoirs under various stress differences. © 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

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

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

research on Wellbore Axis Alignment Calibration Method for Casing deformation Ultrasonic Three-dimensional Imaging technology 1

引用

13th International Field Exploration and development Conference, IFEdC 2023

作者： Song, Heng-Yu Liu, Tian-En dai, Kun Zhang, Xu-Jia Yuan, Guang-Jie Xia, Yan Li, Jing-Cui Zhang, Heng ren, Shi-Ju Pang, Yu-Han CNPC Engineering Technology R&D Company Limited Beijing102206 China National Engineering Research Center of Oil and Gas Drilling and Completion Technology Beijing102206 China Beijing University of Chemical Technology Beijing100029 China

ISBN: (数字)9789819704798

ISBN: (纸本)9789819704781

This study proposes a wellbore axis alignment calibration method for casing deformation ultrasonic three-dimensional imaging technology. This method is based on the characteristic of uneven distribution of data points captured through circumferential scanning when the ultrasonic detection instrument is in an eccentric position. It utilizes the difference in arc lengths between adjacent data points to assign weighted values to each data point. Based on the weighted values of each data point, the weighted averages of the Cartesian coordinates of all data points within one circumference are calculated. The weighted average represents the geometric center coordinates of the casing circumferential curve. The eccentricity is then calculated by subtracting the origin coordinates from the geometric center coordinates. Finally, the eccentricity is used to quantitatively calibrate the wellbore axis alignment. Firstly, the polar coordinates of each data point are converted to Cartesian coordinates using the information of azimuth and distance captured by the scanning instrument. The arc lengths of the data points are calculated based on their coordinates, and the minimum value is selected as the reference. The ratio of each data point’s arc length to the reference value is used as a weighting factor to calculate the weighted average of the Cartesian coordinates. The difference between the weighted average coordinates and the origin represents the offset distance. The planar Cartesian coordinates of all data points are calibrated accordingly, achieving the calibration of wellbore axis alignment in casing deformation ultrasonic three-dimensional imaging. In this study, the two-dimensional alignment calibration was initially performed for standard circular, elliptical, and irregular-shaped casings. A total of 32 data points were selected per circumference, and the calculation results were satisfactory, with a maximum calculation error of 5.5% for the vertical axis offset of the e

关键词： Errors

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：