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12th International Field Exploration and development Conference, IFEdC 2022

作者： Zhang, Yu-da Yuan, Guang-Jie dong, Jing-Nan Xia, Yan Ban, Fan-Sheng Zang, Chun-Yang Research Institute of Petroleum Exploration and Development Beijing China CNPC Engineering Technology R&D Company Limited Beijing China College of Petroleum Engineering Liaoning Petrochemical University Liaoning China

ISBN: (纸本)9789819919635

Energy types are constantly changing due to the change of demand, and natural gas as a clean energy is gradually accepted by the world at present. In order to ensure the stable supply of natural gas, long-term, safe and effective means of peak regulation have emerged, and gas storage has developed rapidly in recent years. The injection and production condition of gas storage changes with the demand of gas peak adjustment. The formation pressure increases and the matrix stress decreases during gas injection. The formation pressure decreases and the matrix stress increases during gas recovery. Compared with production wells, injection and production wells of gas storage are more susceptible to shear stress and tensile stress under the action of alternating loads, so the phenomenon of sand production in gas storage is very common. In this paper, based on the sand production simulation device of gas storage, the influence of alternating load on sand production of gas storage is discussed through indoor experiment. In the experiment, the magnitude and times of applying alternating load are mainly changed to observe the sand production of core. The experimental results show that the core is more likely to produce sand under the action of alternating load, and the amount of sand produced gradually increases with the increase of the number of alternating load. Unconsolidated sandstones also produce sand when the alternating load is lower than the initial sand-producing pressure. The influence of alternating load on sand production of gas storage provides theoretical and experimental basis for sand production prediction and sand control completion method optimization. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2023.

关键词： Sand

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Study On Shear & Tensile Activation Of Hydraulic Fracturing In Natural Fractured reservoirs

Study On Shear & Tensile Activation Of Hydraulic Fracturing ...

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2023 SPE/IATMI Asia Pacific Oil and Gas Conference and Exhibition, APOG 2023

作者： Zhang, Yang Qiao, Yan Zhou, Fujian ren, dengfeng Liu, Yuzhang Bai, Jie China University of Petroleum Beijing China CNPC Engineering Technology R&D Company Limited China PetroChina Tarim Oilfield Company China Research Institute of Petroleum Exploration & Development China

ISBN: (纸本)9781613999813

The most fundamental purpose of reservoir stimulation is to maximize stimulation volume. For reservoirs developed with natural fractures, the maximization of fracture activation (tensile & shear activation) area should be pursued. Many scholars have studied the mechanical conditions of natural fractures activation, and used stress shadow to optimize cluster spacing. However, there is a lack of in-depth research on fracture propagation law, relationship between fracture activation and stress shadow, and factors affecting natural fracture activation. In this paper, numerical simulation methods are used to establish a true three-dimensional hydraulic fracturing model for reservoirs with natural fractures, and the quantitative evaluation indicators of stress shadow area and activation degree of natural fractures are formed. By studying the effects of different natural fracture properties, mechanical and engineering parameters on fracture propagation, stress shadow and natural fracture activation, the main controlling factors affecting fracture propagation and turning, the relationship between fracture activation and stress shadow, and changing rules of fracture activation are clarified. Finally, the fracture turning and accuracy of model are verified by microseismic monitoring data. Studies have shown that large-scale, high-density natural fractures, high net pressure, low in-situ stress difference, and moderate stress-fracture angle (30°~60°) can easily divert the propagation of hydraulic fractures instead of expanding in the horizontal maximum principal stress (Shmax) direction. Fracture tensile activation has a strong positive correlation with stress shadow area, that is, tensile activation leads to the increase of stress shadow area, while fracture shear activation has almost no correlation. Fracture tensile & shear activation area is in a competitive relationship, and shear fractures are dominant when the stressfracture angle is 45-60°, the in-situ stress differenc

关键词： Stresses

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Mesoporous SiO_(2)nanoparticles with low surface energy and multi-level roughness as shale wellbore stabilizers in oil-based drilling fluid

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Petroleum Science 2025年第1期22卷 384-397页

作者： Hong-Yan du Kai-He Lv Jin-Sheng Sun Mei-Chun Li Yuan Geng Xian-Bin Huang Hao-Kun Shen Muhammad Arqam Khan School of Petroleum Engineering China University of PetroleumEast ChinaQingdao266580ShandongChina Key Laboratory of Unconventional Oil&Gas Development Ministry of EducationQingdao266580ShandongChina CNPC Engineering Technology R&D Company Ltd. Beijing102206China Co-Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing210000JiangsuChina Department of Petroleum Engineering NED University of Engineering&Technology395007Pakistan

Oil-based drilling fluids possess excellent properties such as shale inhibition,cuttings suspension,and superior lubrication,making them essential in the development of unconventional oil and gas ***,wellbore instability,caused by the invasion of drilling fluids into shale formations,remains a significant challenge for the safe and efficient extraction of shale oil and *** work reports the preparation of mesoporous SiO_(2) nanoparticles with low surface energy,utilized as multifunctional agents to enhance the performance of oil-based drilling fluids aimed at improving wellbore *** results indicate that the coating prepared from these nanoparticles exhibit excellent hydrophobicity and anti-fouling properties,increasing the water contact angle from 32°to 146°and oil contact angle from 24°to 134.8°.Additionally,these nanoparticles exhibit exceptional chemical stability and thermal *** these nanoparticles into oil-based drilling fluids reduced the surface energy of the mud cake from 34.99 to 8.17 mJ·m×2 and increased the roughness of shale from 0.26 to 2.39 *** modifications rendered the mud cake and shale surfaces amphiphobic,effectively mitigating capillary infiltration and delaying the long-term strength degradation of shale in oil-based drilling *** 28 days of immersion in oil-based drilling fluid,shale cores treated with MF-SiO_(2) exhibited a 30.5%increase in compressive strength compared to untreated ***,these nanoparticles demonstrated the ability to penetrate and seal rock pores,reducing the API filtration volume of the drilling fluid from 11.2 to 7.6 *** study introduces a novel approach to enhance the development of shale gas and oil resources,offering a promising strategy for wellbore stabilization in oil-based drilling fluid systems.

关键词： Fluorosilane Wettability Wellbore stability drilling engineering Self-cleaning Antifouling

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development and Application of Full Vector Geosteering Comprehensive Analysis Software-OneSteer 11th

Development and Application of Full Vector Geosteering Compr...

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11th International Field Exploration and development Conference, IFEdC 2021

作者： Lin, Wang Wu, dong Liu, Lifeng Zhu, Weixing Xue, Hongzhi CNPC Engineering Technology R&D Company Limited Beijing China PetroChina Research Institute of Petroleum Exploration and Development Beijing China

ISBN: (纸本)9789811921483

Horizontal well technology is a favorable means for the efficient development of "deep, low permeability, offshore, unconventional" and other complex reservoirs, and its key is to improve the drilling rate of the target geological body. Based on the analysis of the business process and requirements of geosteering, aiming at the geological characteristics of China's continental shale, carbonate and glutenite reservoirs, the key technical problems such as geo-steering based stratigraphic structure model modeling, main LWd instrument curve forward modeling, interactive geological model editing, dynamic extraction of stratigraphic parameters, multi-information fusion seismic inversion and so on have been solved, and a full vector geosteering comprehensive analysis software named OneSteer was developed. The software is applied to the field geo-steering analysis of carbonate reservoir in southwest of China and shale reservoirs in Xinjiang oilfields, which improves the drilling encounter rate, reduces the drilling risk, improves the drilling efficiency, and achieves satisfactory results. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Extraction

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research on Quantitative Method and Main Control Factors of drilling Crew Operation Effect 13th

Research on Quantitative Method and Main Control Factors of ...

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13th International Field Exploration and development Conference, IFEdC 2023

作者： Xiao, Yue Zhou, Tuo Jing, Ning Li, Hang-Yuan Wang, Gang Liu, Ji-Tong Ye, dong-Qing Zhong, Zhao Li, Bing-rou Jin, Yu-Lai Li, Gan-Lu Li, Jing CNPC Engineering Technology R&D Co. LTD. Beijing China PetroChina International Exploration and Development Co. LTD. Beijing China Beijing China Tianjin Petroleum Vocational and Technical College Tianjin China

ISBN: (纸本)9789819702558

The assessment of drilling crew is crucial for evaluating the operational effectiveness, improving management levels, and improving drilling operation quality and efficiency. Currently, most drilling crew operation evaluation only consider drilling speed and wellbore quality, which cannot fully reflect the overall operational effectiveness of the drilling crew and is not conducive to oilfield enterprises evaluating the operational effectiveness of the drilling crew. Based on sorting statistics and programming calculations methods, and considering the actual drilling site, a multi-level evaluation method for drilling crews was established to quantify the effectiveness of drilling crew operations and provide an evaluation method for multi drilling crew operation projects, considering key indicators such as drilling workload, drilling efficiency, drilling timeliness, wellbore quality control, and diesel consumption, which reflects workload, quality, efficiency, and economy respectively. A method for evaluating the main control factors of drilling operation performance was established based on the grey correlation analysis method, using the drilling crew score as the evaluation indicator for drilling crew operation performance. Taking XX Oilfield as an example, the performance of 8 drilling crews in XX Oilfield in 2020 was quantitatively scored. The analysis results showed that the order of evaluation for XX Oilfield in 2020 was: crew 2 > crew 4 > crew 3 > crew 5 > crew 1 > crew 6 > crew 7 > crew 8. Well quality is the main controlling factor affecting the performance of the drilling crew, and the evaluation results are in line with the actual situation of XX Oilfield. The multi-level drilling crew evaluation method established in this article provides assessment methods for multi-drilling crew operation projects and provides a theoretical basis for the formulation of operation management measures for project companies. © The Author(s), under exclusive license to Spring

关键词： Quality control

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Experimental Investigation of Control rod drops Into Perturbed Fuel Assemblies

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Journal of Nuclear Engineering and radiation Science 2023年第4期9卷 041801页

作者： Park, Namgyu Kwon, Ohjoon Yoo, Youngik Kim, Taesoon Nuclear Fuel Technology Department R&D Center KEPCO Nuclear Fuel Daedeok-daero 989 beon-gil Yuseong-gu Daejeon34057 Korea Republic of Nuclear Fuel Technology Department R&D Center KEPCO Nuclear Fuel 242 Daedeok-daero 989 beon-gil Yuseong-gu Daejeon34057 Korea Republic of SMR Development Unit Central Research Institute Korea Hydro & Nuclear Power Co. LTD 70 Yuseong-daero 1312 beon-gil Yuseong-gu Daejeon34101 Korea Republic of

This paper discusses permanent deformation of the fuel assembly of pressurized water reactors that have to satisfy a drop time requirement of the control rod assembly. during a seismic event, the fuel assemblies and the reactor core exhibit transient vibration. When the fuel assemblies collide, they develop impact forces in the spacer grids along the fuel assemblies. If the impact forces on some spacer grids of the fuel assembly exceed an allowable strength, the buckling occurs in the corresponding spacer grids, followed by permanent deformation. The geometry change of the buckled spacer grids leads to the movement of the guide tube positions in the fuel assembly. Therefore the geometry change is associated with the distortion of the control rod drop path. In this study, the permanent deformation of the spacer grids was measured during the impact tests, and the maximum deviation of the guide tube from the original position was investigated. Control rod drop tests were also performed to measure the change in drop time according to the deformation of the fuel assembly. Using actuators in the loop test facility, the authors realized the first and second bending mode shapes of the fuel assembly under the flowing water condition. Based on a series of drop tests, the critical fuel assembly deformation was identified that could lead to a violation of an allowable drop time of the control rod. Copyright © 2023 by ASME.

关键词： Control rods

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Analysis of Indium-Silver Alloy Thermal Interface material reliability and Coverage degradation Mechanisms

Analysis of Indium-Silver Alloy Thermal Interface Material R...

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Electronics Packaging technology Conference (EPTC)

作者： MinJae Kong dongHyeon Park Won ree YoungJun Koo JoHyun Bae YeonKi Jeong EunSook Sohn dongSu ryu dongJoo Park Kyungrok Park Advanced Process & Material Project Global R&D center Amkor Technology Korea Inc. Incheon Republic of Korea

ISBN: (数字)9798331522001

ISBN: (纸本)9798331522018

Thermal management of microprocessor chips has emerged as a critical issue to ensure high-power operation, especially in high-performance computing (HPC) applications such as artificial intelligence (AI). To effectively transfer the heat generated from the chip junction to the heat spreader or heat sink, the development of thermal interface materials (TIMs) with high thermal conductivity and the processes for applying them are very active in the electronics packaging industry. In general, polymer-based TIMs have been widely developed and used for their mechanical properties and process workability. However, due to the limitations of polymers, the thermal conductivity required for HPC applications cannot be satisfied. Indium (In) has been widely selected for high power consumption devices as a high dielectric constant (k) TIM due to its high thermal conductivity. However, the low liquidus point of In can be problematic for flip chip lidded ball grid array (FCLBGA) applications since indium may be re-melted during ball attachment reflow, which can reduce TIM coverage [3]. In this paper, indium-silver (InAg)-based alloys were evaluated to develop high thermal conductivity TIM solutions that can be applied to large body FCBGA devices and examines the reliability of indium-silver alloy TIMs under thermal cycling conditions. By varying the silver content, we investigated its impact on mechanical stability and TIM coverage degradation. Indium alloy with higher silver content showed reduced package warpage and fewer voids, as observed through Shadow moire and SAT inspection. In contrast, Indium alloys with lower silver content exhibited more significant structural deformation and void formation Our findings suggest that increasing silver content in indium alloys enhances the TIM coverage and mechanical stability with better thermal performance

关键词： degradation Temperature measurement Silver Conductivity Electronic packaging thermal management Indium Heat sinks Thermal stability Heat transfer Thermal degradation

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A micro-crosslinked amphoteric hydrophobic association copolymer as high temperature-and salt-resistance fluid loss reducer for water-based drilling fluids

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Petroleum Science 2024年第3期21卷 1980-1991页

作者： Jian Li Yu-Xi Ji Xiao-Xiao Ni Kai-He Lv Xian-Bin Huang Jin-Sheng Sun School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongChina Key Laboratory of Unconventional Oil&Gas Development China University of Petroleum(East China)Qingdao26650ShandongChina Inspection and Testing Center of Huabei Oil Field Company PetroChinaRenqiu062552HebeiChina Drilling Fluid Research Institute CNPC Engineering Technology R&D Company LimitedBeijing102206China

during ultradeep oil and gas drilling,fluid loss reducers are highly important for water-based drilling fluids,while preparing high temperature-and salt-resistance fluid loss reducers with excellent rheology and filtration performance remains a ***,a micro-crosslinked amphoteric hydrophobic association copolymer(i.e.,dAdC)was synthesized using N,N-dimethyl acrylamide,diallyl dimethyl ammonium chloride,2-acrylamido-2-methylpropane sulfonic acid,hydrophobic monomer,and pentaerythritol triallyl ether *** to the synergistic effects of hydrogen bonds,electrostatic interaction,hydrophobic association,and micro-crosslinking,the dAdC copolymer exhibited outstanding temperature-and *** rheological experiments have shown that the dAdC copolymer had excellent shear dilution performance and a certain degree of salt-responsive viscosity-increasing *** dAdC copolymer could effectively adsorb on the surface of bentonite particles through electrostatic interaction and hydrogen bonds,which bring more negative charge to the bentonite,thus improving the hydration and dispersion of bentonite particles as well as the colloidal stability of the drilling ***,the drilling fluids constructed based on the dAdC copolymer exhibited satisfactory rheological and filtration properties(FLHTHP=12 m L)after aging at high temperatures(up to200℃)and high salinity(saturated salt)***,this work provided new insights into designing and fabricating high-performance drilling fluid treatment agents,demonstrating good potential applications in deep and ultradeep drilling engineering.

关键词： Fluid loss reducer Temperature-and salt-resistance Hydrophobic association Amphoteric Micro-crosslinking

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Microstructure and mechanical properties of Fe/NbC composite layer prepared by in-situ reaction

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China Foundry 2023年第4期20卷 356-364页

作者： Le Chen Ji-lin Li Meng-jun Wang Jie Zheng Yao Zhu Zhuo-lin Liu Bing-gui Lü School of Materials Science and Engineering Central South UniversityChangsha 410083China School of Materials Science and Engineering Xi'an University of TechnologyXi'an 710048China Institute of New Materials Guangdong Academy of SciencesGuangzhou 510650China Guangdong Provincial Key Laboratory of Metal Toughening Technology and Application Guangzhou 510650China Guangdong Guangyun New Material Co. Ltd.Yunfu 527527GuangdongChina Yunfu Guangyun Technology R&D Co. Ltd.Yunfu 527527GuangdongChina

NbC ceramic surface-reinforced steel matrix composites were prepared by an in-situ reaction method at different temperatures(1,050℃,1,100℃and 1,150℃)for different times(1 h,2 h and 3 h).The phase constitution,microstructure and fracture morphology of NbC ceramic surface-reinforced steel matrix composites were analyzed by Xrd,SEM and EdS,and the effects of the in-situ reaction temperature and time on the mechanical properties were systematically *** results indicate that the NbC reinforcement layer is formed through the reaction between Nb atoms and carbon atoms diffused from the steel matrix to the Nb *** thickness of this reinforcement layer increases as the reaction time ***,an increase in reaction temperature results in a thicker reinforcement layer,although the rate of increase gradually *** relationship among the thickness of the Nb C reinforcement layer,the reaction time and temperature was established by data *** optimal tensile performance is achieved at 1,100℃for 1 h,with a tensile strength of 228 *** is also found that the defects between the reinforcement layer and the steel matrix are related to reaction *** 1,100℃,these defects are *** mostly occurs in the NbC reinforced layer of the composites,and the fracture mode is characterized by typical intergranular brittle fracture.

关键词： in-situ reaction NbC reinforcement layer microstructure mechanical property

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What is Learned from Polymer Flooding Practices in Offshore reservoirs?

What is Learned from Polymer Flooding Practices in Offshore ...

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2023 Offshore technology Conference, OTC 2023

作者： Guo, Hu Wang, Zhengbo dang, Sisi Wen, rui Lyu, Xiuqin Liu, Huifeng Yang, Meng China University of Petroleum-Beijing CNPC Research Institue of Petroleum Exploration Development PetroChina Xinjiang Oilfield Company Sinopec Northwest Oilfield Company CNPC Engineering Technology R&D Company Limited

ISBN: (纸本)9781613999745

Polymer flooding is very promising chemical enhanced oil recovery technique because it has been widely field tested in many oil fields and commercially applied in several countries in onshore reservoirs. The understanding of polymer flooding mechanisms is still developing, even though the principal mechanism was sweep efficiency increase due to reduced mobility ratio of water and oil due to reduced mobility of water. The incorporation of polymer flooding mechanisms and practical challenges make some projects fail to attain economical or technical goal. For offshore reservoirs, the polymer flooding becomes more difficult because of limited space and harsh reservoirs. Although there were hundreds of polymer flooding field tests in onshore reservoirs, polymer flooding in offshore reservoirs remains limited. In this paper, the previous onshore polymer flooding lessons and findings were briefly reviewed to look into the mechanisms which can guide the design of polymer flooding in offshore reservoirs. Then, the lessons learned from previous offshore reservoirs were reviewed. Advices were given to improve the field test performance. it is conclude that low concentration polymer solution with moderately-low viscosity should be injected into offshore reservoirs to keep displacing pressure between injectors and producers. The injected polymers should have good transportation ability which avoids the formation blockage. The optimum injection timing remains to be further investigated because the evidences. The injection rate should be controlled to avoid well casing damage which has been observed in onshore reservoirs. Except for Bohai oilfield, the formation blockage was not reported in offshore reservoirs. However, the microfracture can form in injectors which improved the injectivity of polymers as long as the injected polymers have good transportation capacity. © 2023, Offshore technology Conference.

关键词： reservoirs (water)

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