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SSrN 2023年

作者： Song, Hanxuan Guo, Jixiang Kiyingi, Wyclif Chen, Xiangwei Li, Binru Zhang, Shiling ruiying, Xiong Li, Wang 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

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Study and Analysis of Casing/Tool Contamination and damage during Fluid Circulation of drilling Fluids in Ultra-deep Wells

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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

关键词： Contamination

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Improving the Performance of a Polyamine Shale Inhibitor by Introducing a Hydrophobic Group in Oil and Gas development

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SSrN 2023年

作者： Huang, Xianbin dai, Zhiwen Zhang, Chao Lv, Kaihe Meng, Xu Wang, ren Lalji, Shaine Muhammadali Khan, Muhammad Arqam Ministry of Education Qingdao266580 China Qingdao266580 China CNPC Engineering Technology R&D Co. Ltd. Beijing102206 China NED University of Engineering & Technology Karachi75270 Pakistan

Wellbore instability in complex shale formations is a major technical problem that restricts drilling safety and efficiency. In this paper, a hydrophobic cationic polyamine shale inhibitor (HCPA) was prepared by introducing a hydrophobic group into the molecular structure of an amine-based shale inhibitor having a branched structure. The shale inhibition performance of HCPA and the amine-based shale inhibitor without the hydrophobic group (CPA) was investigated. The hydration inhibition mechanism of HCPA was studied by experiments of zeta potential, particle size, contact angle, thermogravimetric analysis (TGA), X-ray diffraction (Xrd), Fourier-transform infrared spectroscopy (FTIr), et al. The evaluation results show that HCPA had a better performance than CPA in terms of inhibition of hydration swelling, hydration dispersion and mud making, which indicates that the hydrophobic group is beneficial to improve the inhibition ability of the amine-based shale inhibitor. Mechanism study show that there is no hydrogen bond between HCPA and clay. The adsorption on the clay surface is mainly driven by electrostatic interaction, which reduces the repulsion of the electric double layer and thus inhibits the osmotic hydration of clay. HCPA could greatly increase the water contact angle of the rock and the mud cake. The contact angle of the rock and mud cake could reach 133° and 69.5°, respectively, when the concentration of HCPA is 0.5%. TGA and Xrd tests proved the bentonite modified by HCPA had a lower weight loss of at 200 °C than bentonite modified by CPA, and interlayer spacing of HCPA-modified bentonite was reduced compared with that of unmodified bentonite, indicating that the ability of bentonite to adsorb water molecules is reduced after the introduction of hydrophobic groups. This can effectively inhibit the surface hydration of clays. In addition, HCPA can reduce the imbibition capacity of rocks by reducing the surface tension of water. This paper can provide theor

关键词： Bentonite

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Effect of Magnesium Methacrylate on Properties of Hydrogenated Nitrile rubber at High Temperature

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SSrN 2022年

作者： Sun, Xiaoliang Zhao, Yujun Luo, Xichao Song, Jian Guo, Tianming Liu, Xinxin CNPC Engineering Technology R&D Beijing Petroleum Machinery Co. Ltd. Beijing China

Hydrogenated nitrile butadiene rubber (HNBr) is widely used in the field of oil drilling due to its high temperature and oil resistance, but its resistance to thermal oxygen aging and drilling fluid resistance at high temperature needs to be improved. Five kinds of rubber formulations were prepared by adding different amounts of magnesium methacrylate(MgMA) into the hydrogenated nitrile rubber. According to the analysis of mechanical properties, the formula with 8 portions of MgMA has excellent comprehensive properties and the best comprehensive anti-aging properties after thermal oxygen aging and drilling fluid immersion. This work provides data support and theoretical guidance for the optimization of hydrogenated NBr. © 2022, The Authors. All rights reserved.

关键词： drilling fluids

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Fake News detection Using Machine Learning Techniques 4

Fake News Detection Using Machine Learning Techniques

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4th International Conference on Advancement in Electronics and Communication engineering, AECE 2024

作者： Mittal, Prakhar Singh Saini, Jasleen Agarwal, Ankita Maheshwari, rajeev Kumar Kumar, Sandeep Singh, Arjun Atri Cure Company Department of It MasonOH United States Kla Corporation Department of It MI United States Iilm University Department School of Computer Science and Engineering Greater Noida India R.D. Engineering College Department of Cse Duhai Ghaziabad India Raj Kumar Kumar Goel Institute of Technology Department of It Ghaziabad India Greater Noida Institute of Technology Department of Cse Greater Noida India

ISBN: (纸本)9798350364729

These days, wide spread of fake news on different social media platforms and different news sources are one of the strong reasons to cause social damage which is a serious concern. Through different social media platforms such as: Instagram, Twitter, Facebook and YouTube etc. fake news are spread among billions of people daily. In this approach, our aim to distribute something more on Fake News detection, we focus more on techniques to classify among fake and genuine news. We aim to provide people with the real news to avoid conflicts. © 2024 IEEE.

关键词： Fake detection

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

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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

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

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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

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

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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

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research on small molecule wetting agent for drilling fluids applied in Antarctic drilling engineering

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Petroleum Science 2025年

作者： Huang, Ning Sun, Jin-Sheng Liu, Jing-Ping Lv, Kai-He deng, Xue-Fei Yi, Hai-Jiang Shandong Qingdao266580 China CNPC Engineering Technology R & D Company Limited Beijing102206 China

Antarctica contains numerous scientific mysteries, and the Antarctic ice sheet and its underlying bedrock contain important information about the geological structure of Antarctica and the evolutionary history of the ice sheet. In order to obtain the focus of these scientific explorations, the Antarctic drilling engineering is constantly developing. The drilling fluid performance directly determines the success or failure of drilling engineering. In order to enhance the poor performance for drilling fluids due to poor dispersion stability and easy settling of organoclay at ultra-low temperatures, the small-molecule wetting agent (HSr) for drilling fluid suitable for Antarctica was prepared by oleic acid, diethanolamine and benzoic acid as raw materials. Its chemical structure, properties and action mechanism were investigated by various experimental methods. The experimental results showed that 2% HSr could improve the colloidal rate for drilling fluid from 6.4% to 84.8%, and the increase rate of yield point was up to 167%. Meanwhile, it also made the drilling fluid excellent in shear dilution and thixotropy. In addition, 2% HSr could increase the density from 0.872 to 0.884 g/cm3 at −55 °C. And the drilling fluid with 2% HSr had a good thermal conductivity of 0.1458 W/(m·K) at −55 °C. This study gives a new direction for the research of drilling fluid treatment agents suitable for the Antarctic region, which will provide strong support for the scientific exploration of the Antarctic region. © 2025 The Authors

关键词： drilling fluids

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research progress of clay transformation in drilling fluids

Research progress of clay transformation in drilling fluids

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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

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