检索结果-内蒙古大学图书馆

SSrN 2023年

作者： Song, Hanxuan Guo, Jixiang Wyclif, Kiyingi Chen, Xiangwei Xiong, ruiying Wang, Li Li, Binru Zhang, Shiling Unconventional Petroleum Research Institute China University of Petroleum Beijing102249 China State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing China CNPC Engineering Technology R&D Company Limited Beijing China

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 fluids under a field thermal gradient. Several methods have been applied, such as micro-observation, roughness scanning, compositional detection, contact angle measurement to evaluate this damage to the metal samples. After simulated erosion damage, the metal samples were analyzed from multiple angles and in all directions. 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 fluids shows different roughness, and the wettability of drilling fluids on the casing/tool surface increases with an increase in the degree of roughness. Oil-based muds have the strongest adhesion contamination on casing/drilling tools among the drilling fluids. In contrast, polysulfonated potassium muds and ultramicro drilling fluids 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 fluids, with solids producing many abrasion marks and corrosive ions causing a large number of pits. The synergistic effect from the two mud constituents exacerbates the extent to which drilling fluids damage the casing/drilling tools.

关键词： Contamination

来源：评论

学校读者我要写书评

暂无评论

Case study: Treating parameters optimization in casing deformation wells of shale gas in Sichuan basin 54

Case study: Treating parameters optimization in casing defor...

引用

54th U.S. rock Mechanics/Geomechanics Symposium

作者： Chen, Zhaowei Huang, rui Zeng, Bo Song, Yi Zhou, Xiaojin CNPC Engineering Technology R&D Company Limited Beijing China PetroChina Southwest Oil and Gas Field Company Chengdu China

Casing deformation is a key issue which restricts the efficient development of shale gas in Sichuan Basin. We make statistics on the treating parameters and the corresponding casing deformation of 75 fracture zones in Changning block, and analyzes the effect of fluid volume reduction and pumping rate reduction on casing deformation. Taking the casing deformation wells of H pad in this block as case, the fracture model and in-situ stress model are established based on 3d seismic and well logs, the relationship between treating parameters and fault activation is established by hydraulic fracturing simulation, with which the sensitivity of treating parameters were analyzed. The field statistics results show that the reduction of pumping rate and fluid volume both have a certain effect on mitigating casing deformation, and the effect of pumping rate is better than fluid volume. The simulation results show that the reduction of pumping rate and fluid volume both can abate the fault activation level to mitigate casing deformation. Thus it provides an explanation for the field practice in theory. The simulation results also show that, for high slip risk faults, reducing fluid volume is more effective than reducing pumping rate;for medium slip risk faults, reducing pumping rate is more effective than reducing fluid volume. Based on the field and theoretical analysis results, the treating parameters optimization method of "for high slip risk faults, priority to reduce fluid volume;for medium slip risk faults, priority to reduce pump rate" is proposed. This method can be used to mitigate the faults activation by hydraulic fracturing and may provide an effective method for mitigating casing deformation. © 2020 ArMA, American rock Mechanics Association

关键词： deformation

来源：评论

学校读者我要写书评

暂无评论

Matching Analysis and Experimental Study of Mechanical Properties of Cement Sheath Interface

SSRN

引用

SSrN 2022年

作者： Cheng, Y.Q. Liu, S.Q. Shen, J.Y. Guo, X.L. Huang, Z. Liu, H.T. Research Institute of Petroleum Exploration & Development Beijing100089 China Cementing and Completion Research Institute CNPC Engineering Technology R&D Company Limited Beijing102206 China

Clarifying the mechanism of cement sheath interface matching and determining the cement sheath interface matching under specific downhole conditions is a fundamental and challenging requirement for accurate prediction of cement sheath integrity. The mechanical properties of the cement sheath interface, an important component of the cement sheath integrity, are the key factors affecting the damage of the cement interface. In this study, we propose a method to measure the variation of cement sheath interfacial match with the mechanical properties of the cement sheath under typical downhole conditions, including the Young's modulus of the cement sheath and the Poisson's ratio. The analysis of cement sheath interface matching was further combined with experimental methods to test the accuracy of the cement sheath interface matching method in this study and to assess the cement sheath integrity capabilities of different cement types under different operating conditions. The numerical results show that increasing the cement sheath Young's modulus as well as decreasing the Poisson's ratio without considering the downhole conditions can improve the cement sheath interface matching, but the cement sheath interface is more sensitive to the cement sheath Poisson's ratio. Laboratory measurements have shown that reducing Poisson's ratio by adding materials such as latex to cement significantly improves the cement's ability to ensure cement sheath integrity, although the Young's modulus of the cement sheath decreases in parallel with the addition of latex. Based on the results of the experimental and numerical methods, qualitative and quantitative recommendations are provided for field operations to suppress cement sheath integrity risks throughout the life cycle of the wellbore. © 2022, The Authors. All rights reserved.

关键词： Poisson ratio

来源：评论

学校读者我要写书评

暂无评论

Output Controllability Analysis of the Affine Nonlinear Systems

Output Controllability Analysis of the Affine Nonlinear Syst...

引用

Youth Academic Annual Conference of Chinese Association of Automation (YAC)

作者： Xia Xie Sixun Liu Qi Yuan Zhuo Wang CNPC Engineering Technology R & D Company Limited Beijing China School of Instrumentation and Optoelectronic Engineering Beihang University Beijing China

ISBN: (纸本)9781665465373

In this paper, the output controllability of a class of affine nonlinear systems are investigated, which containing a continuous-time and discrete-time cases, respectively. According to these model, the sufficient and necessary criteria of its global output controllability are provided under some basic assumptions. Moreover, the simulation for verifying the validity of these theorems are implemented.

关键词： Automation Controllability Trajectory Nonlinear systems

来源：评论

学校读者我要写书评

暂无评论

Suppressed grain boundary scattering effect to enhance electrical transport properties of La0.815Sr0.185MnO3 polycrystalline ceramic via high-temperature sintering process

引用

Ceramics International 2025年

作者： Liang, Xiaolu Chen, Zihao Wang, Zhenyu Pan, Zimeng Wang, Yao Wang, Haitao Sun, Jiankun Ma, Jun Jiang, Xuexing Peng, Jubo Gu, Xin Zhang, Jing Liu, Xiang Faculty of Material Science and Engineering Kunming University of Science and Technology Yunnan Kunming650093 China Kunming Kaihang Optoelectronic Technology Co. LTD Yunnan Kunming650200 China Company Limited R&D Center Yunnan Kunming650106 China

Polycrystalline La0.815Sr0.185MnO3 (LSMO) ceramic was synthesized using the sol-gel method. The effect of varying sintering temperatures (1763, 1783, 1803 and 1823 K) on the microstructure and electrical transport properties were systematically investigated. The samples exhibited a distinct dual-peak metal-insulator transition, with the first peak (Tp1) primarily influenced by grain boundary (GB) scattering effect. At lower sintering temperatures, lattice strain induced by the ionic size mismatch between La3+ and Sr2+ ions is transferred to the grain boundaries, increasing their contribution to resistivity. As the sintering temperature rises, the grain boundary effect diminish, leading to a suppression of the Tp1 peak. Elevated sintering temperatures further promote hybridization effect, enhancing the double exchange mechanism. As the temperature increases, this mechanism gradually becomes dominant, leading to a more pronounced influence of the Tp2 peak. Additionally, higher sintering temperatures reduce grain boundary scattering, improving the temperature coefficient of resistivity (TCr). At an optimal sintering temperature of 1803 K, the LSMO ceramic achieved a peak TCr of 10.78 % K−1 near room temperature (284.8 K), demonstrating strong potential for improved performance in uncooled infrared bolometers or electronic switch devices. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Sol-gel process

来源：评论

学校读者我要写书评

暂无评论

A tight sandstone multi-physical hydraulic fractures simulator study and its field application

引用

Petroleum 2020年第2期6卷 198-205页

作者： Yonghong Wang Binshan Ju Shihao Wang Zhenzhou Yang Qing Liu School of Energy Resource China University of GeoscienceBeijingChina CNPC Engineering Technology R&D Company Limited(CPET) China Petroleum Engineering Department Colorado School of MinesGoldenCO80401USA

during the past years,the recovery of unconventional gas formation has attracted lots of attention and achieved huge *** produce gas from the low-permeability unconventional formations,hydraulic fracturing technology is essential and *** this paper,we present the development of a three-dimensional thermalhydraulic-mechanical numerical simulator for the simulation of hydraulic fracturing operations in tight sandstone *** simulator is based on integrated finite difference(IFd)*** this method,the simulation domain is subdivided into sub domains and the governing equations are integrated over a sub domain with flux terms expressed as an integral over the sub domain boundary using the divergence *** simulator conducts coupled thermal-hydraulic-mechanical simulation of the initiation and extension of hydraulic *** also calculates the mass/heat transport of injected hydraulic fluids as well as *** simulator is able to handle anisotropic formations with multiple *** simulator has been validated by comparing with an analytical solution as well as ribeiro and Sharma *** model can simulate fracture spacing effect on fracture profile when combining IFd with discontinuous displacement Method(ddM).

关键词： Tight sandstone Hydraulic fracture simulator Integrated finite difference discretization Stress contrast

来源：评论

学校读者我要写书评

暂无评论

research progress of clay transformation in drilling fluids

Research progress of clay transformation in drilling fluids

引用

作者： Zhilei Zhang Yichen Zhang Shuting Gong Shouyong Tang rongchao Cheng Zheng Yang Han ren Hong Yang CNPC Engineering Technology R&D Company Limited Zhejiang Oilfield Company Natural gas Exploration & Development Department

As an important slurry material for water-based drilling fluids, montmorillonite has been widely used in oil drilling because of its excellent properties such as expansibility, dispersion and suspension, slurry making, cation exchange and adsorption. However, at a certain temperature and pressure, montmorillonite will transform into illite, chlorite and other minerals, changing the properties of drilling fluids. In order to systematically summarize and sort out the current research status of montmorillonite transformation, this study focused on the research progress of montmorillonite transformation into other minerals under different temperature and pressure conditions, and summarized the transformation mechanism of montmorillonite. The montmorillonite is transformed into illite by adding K+ in the interlayer spacing and removing Si by adding Al to tetrahedron structure. The conversion of montmorillonite to chlorite by adding Fe, Mg ions into the octahedron, and Si in the tetrahedron is replaced by Al. The precipitated brucite layer is connected with the upper and lower layers.

关键词： red research progress of clay transformation in drilling fluids

来源：评论

学校读者我要写书评

暂无评论

Casing shearing failure in shale gas wells due to fault slippage caused by hydraulic fracturing-case study

Casing shearing failure in shale gas wells due to fault slip...

引用

Abu dhabi International Petroleum Exhibition and Conference 2020, AdIP 2020

作者： Liu, Kui Chen, Zhaowei Zeng, Yijin Cao, Hu Tao, Qian Wang, Zhifa Zhang, Hongbao Sinopec Research Institute of Petroleum Engineering CNPC Engineering Technology R&D Company Limited China University of Petroleum Beijing China

ISBN: (纸本)9781613997345

According to the analysis of casing deformation events and the achieved micro-seismic data in four shale gas wells, the slip of the fault is treated as the main reason for casing deformation problems in shale gas wells in Changing. Analytical model for calculating fault slippage is established based on elastic mechanics and the slippage of faults around 4 shale gas wells is calculated. The calculated results show that both the height of fault reactivation area and the angle between the maximum in-situ stress and fault have significant effect on the fault slippage. The location of the intersection point where casing goes through the reactivation area of fault can significantly affect the casing deformation. The closer the intersection point is to the center of reactivation area, the larger fault slippage and the serious casing deformation occurs. Case study in well Ning201-H1 shows that the slippage of fault at total depth 3490 of this well is 30.5mm, and the corresponding casing deformation is 10.5mm which is in agreement with field data. The casing deformation in drilling platform H19 is much more serious due to the extremely complicated faults and the large reactivation area. The maximum casing deformation reaches 35mm in well H19-5. The results of this study have significant reference value for understanding the mechanism and controlling methods for casing deformation in shale gas wells during hydraulic fracturing treatment. Copyright © 2020, Society of Petroleum Engineers

关键词： deformation

来源：评论

学校读者我要写书评

暂无评论

Completion and stimulation trends in North American unconventional plays and resulting impact on well productivity

引用

钻探工程 2021年第10期48卷 1-12页

作者： roman Galchenko Qing Liu Yan Gao Yu Liu david He Josh Zhang Huailiang Liu Xiaohua Ke CNPC USA Houston TX 77042USA CNPC Engineering Technology R&D Company Limited Beijing 102206China College of Petroleum Engineering China University of Petroleum(Beijing)Beijing 102249China

过去十年,非常规油气勘探开发在全球范围内大幅扩张。水平钻井和多级水力压裂技术也在不断地发展和创新,使得超长水平井成为可能。同时,因为压裂强度不断增加,作业者可以最大限度地提高储层接触面积和对储层的改造体积(SrV)。然而,完井... 详细信息

过去十年,非常规油气勘探开发在全球范围内大幅扩张。水平钻井和多级水力压裂技术也在不断地发展和创新,使得超长水平井成为可能。同时,因为压裂强度不断增加,作业者可以最大限度地提高储层接触面积和对储层的改造体积(SrV)。然而,完井优化方面的挑战仍然存在,作业者持续不断地尝试和试验各种完井与增产参数组合,以确保非常规油气藏开发的经济可行性。优选最佳的完井与增产参数组合是一项非常关键的任务,应结合油气田的具体储层特征进行优化。本文总结了2014—2020年间北美9个主要非常规油气藏的压裂增产趋势,包括Marcellus,Haynesville,Barnett,Utica,Bone Spring,Bakken,Wolfcamp Midland,Eagle Ford,Scoop/Stack。分析了各油气田几个关键的完井和增产参数的整体趋势,同时还评估了单个参数(如水平段压裂长度、支撑剂强度、段间距等)对井产能的影响。然后对比分析相应的初始井产量(90天平均初始产量),评估各个参数对产能的影响,从而确定每个完井参数的最佳范围,以实现产能最优化。

关键词：水力压裂多级完井增产趋势井产能水平段长度支撑剂强度用液强度段间距井间距非常规油气北美

来源：评论

学校读者我要写书评

暂无评论

Novel spherical polymer sealing agent for oil-based drilling fluids to overcome borehole instability problem in low permeability reservoirs 4th

Novel spherical polymer sealing agent for oil-based drilling...

引用

4th International Conference on New Material and Chemical Industry, NMCI 2019

作者： Li, Long Cheng, rongchao Ma, Cha Zhang, Jie Jiangxi Science and Technology Normal University Nanchang330013 China CNPC Engineering Technology R&D Company Limited Beijing100083 China

ISBN: (纸本)9783035716511

due to borehole instability problem in low permeability formations, a new type of spherical polymer sealing agent (OLBS) for oil-based drilling fluids was prepared via suspension polymerization, and the sealing effect of polymer sealing agent on low permeability cores was evaluated. The results indicated that OLBS had no influence on the rheological properties of oil-based drilling fluids. The core displacement experiments indicated that OLBS could reduce the core permeability by a significant amount, and thus stop fluid invasion into the formations, so OLBS could provide an excellent sealing effect and improve wellbore strength. Using this polymer sealing agent to plug the low permeability formations is a very powerful approach to address borehole instability problem in troublesome low permeability formations. This sealing agent is suitable for the drilling of long sections of horizontal laterals. In the future, the oil-based drilling fluids containing OLBS might hold great promise to resolve borehole instability problem in low permeability formations. © 2020 Trans Tech Publications Ltd, Switzerland.

关键词： Low permeability reservoirs

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：