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Multi-scale elastoplastic mechanical model and microstructure damage analysis of solid expandable tubular

Chinese Physics B 2020年第10期29卷 336-348页

作者： Hui-Juan Guo Ying-Hua Liu Yi-Nao Su Quan-Li Zhang Guo-dong Zhan Department of Engineering Mechanics AMLTsinghua UniversityBeijing 100084China Drilling Mechanical Department CNPC Engineering Technology R&D Company LimitedBeijing 102206China Drilling Technology Division EXPEC Advanced Research CenterSaudi Arabia

We present an in-depth study of the failure phenomenon of solid expandable tubular (SET) due to large expansion ratio in open holes of deep and ultra-deep wells. By examining the post-expansion SET, lots of microcracks are found on the inner surface of SET. Their morphology and parameters such as length and depth are investigated by use of metallographic microscope and scanning electron microscope (SEM). In addition, the Voronoi cell technique is adopted to characterize the multi-phase material microstructure of the SET. By using the anisotropic elastoplastic material constitutive model and macro/microscopic multi-dimensional cross-scale coupled boundary conditions, a sophisticated and multi-scale finite element model (FEM) of the SET is built successfully to simulate the material microstructure damage for different expansion ratios. The microcrack initiation and growth is simulated, and the structural integrity of the SET is discussed. It is concluded that this multi-scale finite element modeling method could effectively predict the elastoplastic deformation and the microscopic damage initiation and evolution of the SET. It is of great significance as a theoretical analysis tool to optimize the selection of appropriate tubular materials and it could be also used to substantially reduce costly failures of expandable tubulars in the field. This numerical analysis is not only beneficial for understanding the damage process of tubular materials but also effectively guides the engineering application of the SET technology.

关键词： solid expandable tubular(SET) material microstructure damage multi-scale elastoplastic model virtual failure

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High-Speed Wired drill Pipe and its Corresponding Manufacture & Test technology research

High-Speed Wired Drill Pipe and its Corresponding Manufactur...

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2021 Abu dhabi International Petroleum Exhibition and Conference, AdIP 2021

作者： Han, Haochen Zhang, Yong Chen, Jia Sun, Qi Fang, Zhimeng Li, Hexiang Liu, Zeng Zhang, Guobin CNPC Engineering and Technology R&D Company CNPC Materials Procurement Center

ISBN: (纸本)9781613998342

High-speed wired drill pipe and its corresponding communication technology not only can achieve high-speed transmission rate and high-capacity, but also can realize real-time monitoring and dual-way communication in whole section, which can prevent downhole problems effectively. As a series system, the homogeneity and robustness of these wired drill pipes are crucial. This paper focuses on how to overcome the difficulty in manufacturing process of information drill pipe and complete the validation test. In order to guarantee the quality of information drill pipe and satisfy the technological requirements of mass production, we optimize the manufacturing process and put forward reasonable test techniques. The optimizations of manufacturing process include the analysis on constant tension of pressure pipe, quantitative cutting pipe and perforation in pipe nozzle. The testing techniques includes magnetic coupling coil impedance test, high pressure test, communication performance test of both single pipe and series system. The test result can be judged and evaluated by the attenuation value of the signal attenuation test and the signal reflection waveform as well as sealing reliability. With the help of the optimization of the manufacturing process and the application of new tooling, the quality and robustness of information drill pipe is improved obviously. Pass rate in primary assembly is increased from 70% to 92%. After the second assembly, pass rate can be increased to 99.5%. Besides, the work efficiency is greatly improved and the process requirements of mass production are satisfied. The validation test can screen out the drill pipe with poor quality and performance effectively thus to improve the reliability of the whole system. By means of the improvement of manufacturing and the validation test, the comprehensive pass rate of information drill pipes is increased from 84% to 95%. during three field tests in Jilin and daqing Oilfield, the information drill pipes

关键词： drills

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Stability Analysis of Underground-gas-storage Salt Cavern Based on Similarity Criterion 55

Stability Analysis of Underground-gas-storage Salt Cavern Ba...

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55th U.S. rock Mechanics / Geomechanics Symposium 2021

作者： dong, Jingnan Li, Guotao Liu, Tianen Li, Jingcui Zhang, Yingbin CNPC Engineering Technology R&D Company Limited Beijing China HydroChina-ITASCA R&D Center Hangzhou China

ISBN: (纸本)9781713839125

Underground gas storage using salt cavern is becoming popular due to the rising problem of the seasonal gas demand peaking. The salt cavern stability analysis is an indispensable part of the salt cavern design. The aim of the research is to study the stability of the two-well-horizontal caverns and establish the universal similarity criteria controlling the creep of the cavern. The WIPP-drucker model is investigated. The mechanical properties of the formation generally follow the geo data from Pingding Mountain. The creep simulation is performed over a period of 30 years under different and cycling cavern gas pressures simulating the gas demand peak over the whole year. The similarity criteria regarding salt cavern stability are established based on dimensional analysis. The dimensional relationships between surface subsidence, cavern volume reduction, in-situ stress, cavern gas pressure, steady-state creep rate, creep time and characteristic length of the cavern are founded. results show that the simulated cavern volume reduction due to creep corresponds to the measured real cavern volume change over years. The results also show that a total of 9 dimensional physical quantities control the whole creep system. There are 4 simple criteria and 2 composed criteria, which correspond to 6 scaling criterions. The numerical simulation results verify the accuracy of the scaling criterions. The study provides guidance to the salt cavern design and operation process in the term of the mechanical stability of the cavern. © 2021 ArMA, American rock Mechanics Association

关键词： Creep

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Performance and mechanism study of ampholytic copolymer as a temperature-resistant and salt-tolerant filtration loss control additive in water-based drilling fluids

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Colloids and Surfaces A: Physicochemical and engineering Aspects 2025年 722卷

作者： He Li Fan Liu Jinsheng Sun ren Wang Huijun Hao Xianbin Huang CNPC Engineering Technology R & D Company Limited Beijing 102206 PR China School of Petroleum Engineering China University of Petroleum (East China) Qingdao Shandong 266580 PR China

As oil and gas development progresses towards deeper formations, a series of technical challenges arise during the drilling process due to the high temperature and high salinity conditions underground. One of the hot issues is maintaining low filtration loss of water-based drilling fluids (WdFs). The study reported the synthesized method of an ampholytic copolymer (AC), which utilized to control the filtration loss. Fourier transform infrared spectroscopy analysis were carried out to validate the structure of AC. A significant weight loss of AC occurred after temperatures exceeded 292 °C according to thermogravimetric analysis. The filtration results showed that with 2 % AC added, the filtration loss volume of WdFs was only 8.6 mL after aging at 200 °C, even with a NaCl content of 30 wt%. Experiments were carried out to analyze the effect of AC on the zeta potential of bentonite. The effect of AC on bentonite particle size was analyzed simultaneously. Additionally, WdFs-formed filter cakes were analyzed for the micromorphology and permeability. According to the obtained results, bentonite was adsorbed by AC, thereby reducing its zeta potential and particle size. This ultimately resulted in an increase in filter cake density, which effectively reduced the filtration loss volume. This work breaks the conventional wisdom that high salinity and high temperature resistance cannot be achieved in a single material. By integrating sulfobetaine’s charge adaptability with the rigidity of the benzene ring, our copolymer exhibits unparalleled stability, a guiding strategy for molecular structure design of WdFs additives.

关键词： Fourier transform infrared spectroscopy

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research on drilling Technologies of Ultra-Thick Salt domes in Middle Asia and Pre-Salt Strata in Middle East: Lessons Learnt from a Pilot Well in Kenkyak Oilfield and an HPHT Well in Halfaya Oilfield

Research on Drilling Technologies of Ultra-Thick Salt Domes ...

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2023 Offshore technology Conference Brasil, OTCB 2023

作者： Jin, Fu Wanting, Jia Longlian, Cui Guobin, Yang Chen, Chen CNPC Engineering Technology R&D Company Ltd China

ISBN: (纸本)9781959025023

Pre-salt strata are more and more common in recent years, challenging the petroleum industry. The reservoir in Kenkyak Oilfield (Kazakhstan) is found in deep formation beneath the ultra-thick salt dome, which brings lots of challenges such as mud loss, well kick, pipe-sticking, borehole caving, low rOP and so on. As for Halfaya Oilfield in Iraq, HF-10 is expected to be drilled as the first vertical exploration well in the region, targeting Baluti/Kurra Chine, but the complicated multiple pressure regime, cross-bedded high-pressure and low-pressure formations has been challenging the operator for decades, especially the two high-pressure formations above Yamama, one is the Lower Fars layer featured by salt-gypsum and a high pore pressure coefficient. How to safety and efficiently penetrate pre-salt strata and ultra-thick salt domes are rather important issues. Logging data of all wells that had been drilled previously in the region were studied to analyze causes of low rOPs and downhole complexities of all kinds. A pilot well was drilled in Kenkyak Oilfield and optimized drilling technologies were applied on it, so as to make a comparison between it and adjacent wells. rock cores in the salt-gypsum formation were collected to analyze its creep deformation law on a basis of rock mechanics and establish the creep deformation formula. Important findings have been analyzed, in order to deal with the similar scenarios in Iraq. The upper Mesozoic formation contains sandstones and intercalated mudstones with ooze, which increases permeability and hydration grade. However, problems such as mud loss, borehole collapsing and bit ball-up always happen. Shallow secondary gas with a limited volume and high pressure was drilled in the pilot well in Kenkyak Oilfield. The polymeric mud system and integrated solid control devices were used for the large diameter borehole to deal with mudstone hydration. In the Permian ultra-thick salt dome salt and gypsum dissolve to cause borehole c

关键词： Boreholes

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development of Online drilling Fluid Property Logging System

Development of Online Drilling Fluid Property Logging System

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2022 IAdC/SPE International drilling Conference and Exhibition, dC 2022

作者： Ge, Yunhua Mei, Yunyi Zhang, Songjie Zhang, Yanlong Liu, Guanglai Yang, Hao Wang, Qi He, david Zhang, Josh CNPC – Engineering Technology R&D Company Limited China CNPC – Oilfileds Technology Service Company China CNPC – Kunlun Data Intelligent Limited China China University of Geology China CNPC United States

ISBN: (纸本)9781613998427

Continuously monitoring of drilling fluid properties and simulating of down hole hydraulics is critical and beneficial for safe and efficient drilling. However, the drilling fluids properties are generally taken once every regulated interval and the downhole wellbore conditions and drilling fluids performance are judged accordingly and sometimes experientially for lack of updated data. In this paper, we present a novel unit called On –line drilling Fluids Properties Logging System (OdFPLS) for real-time measurement of drilling fluids property and software for downhole hydraulics modeling by integrating of these real-time measured data. The OdFPLS unit consists of four testing modules, they are density module, rheology module, Funnel Viscosity module, and Ion Content module. during working, the fluid sample is sucked in and flowed first to the density module, tested there and then flowed to other modules in above order and finally discharged into waste pits without any human intervention. The test data is stored in the database of well-site digital platform and shared to the remote Operational Centers (rOCs) for drilling fluids performance diagnosis and downhole hydraulics modeling The indoor and field pilot tests showed that the unit is capable of measuring fluid properties such as mud density, funnel viscosity, rheological behavioral parameters, calcium and chlorine concentration and so on properly and accurately while drilling compared with manual measurement by lab operators. The drilling fluids performance diagnosis and hydraulics modeling provides not only rheological mode identification but also the real time equivalent circulating density ECd and equivalent static density ESd at any point in the wellbore during drilling. It also delivers surge and swab pressure calculation as well as ECd data while tripping drill pipe or setting casing. The timely availability of the information enables the mud engineer and drilling engineer to aware the status and trends of

关键词： drilling fluids

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Selection of deformation Induction Thermal Correction Coil Scheme for Sheet Welding 2

Selection of Deformation Induction Thermal Correction Coil S...

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2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control, METMS 2022

作者： Wang, LaiZhen duan, ruiBin Long, Bin Lv, Li Wu, JinMing Fan, Zhen CNPC Engineering Teachnology R&D Company Limited Tianjin300451 China

ISBN: (数字)9781510654785

ISBN: (纸本)9781510654778

In this paper, a kind of inductive hot correction coil for sheet welding deformation is proposed. In this scheme, COMSOL Multiphysics simulation software is mainly used to analyze the electromagnetic - stress coupling of the thin steel plate with size parameter of 1000 mm×600 mm×6 mm, so as to explore the influence of different coil forms on the temperature field and correction effect. The results show that for the longitudinal magnetic flux rectangular coil, the temperature field distribution is uniform, but the temperature rise efficiency is lower than that of the transverse magnetic flux circular coil, and the clamping of the workpiece is inconvenient. Under the action of the offset longitudinal magnetic flux rectangular coils and transverse magnetic flux rectangular coils, the temperature field distribution is not uniform, and the deformation trend of the workpiece cannot achieve the purpose of correcting the welding deformation. Under the action of transverse magnetic flux circular coil, the workpiece's temperature rise rate is fast, the temperature distribution is even, the cooling process is gentle, and the correction effect is good. Considering the thermal efficiency of the coil, the effect of correction and the convenience of correcting the large-size sheet, the transverse magnetic flux circular coil was finally determined to be suitable for the deformation correction of the sheet after welding. © 2022 SPIE

关键词： Computer software

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Experimental Investigation of Fracture Initiation Pressure reduction Mechanism through A New Hydraulic Pre-Pressurized Approach 10

Experimental Investigation of Fracture Initiation Pressure R...

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10th Academic Conference of Geology resource Management and Sustainable development 2022

作者： Zhang, Yang Pan, Zhikun Liu, Yuzhang Zhou, Fujian Yao, Jiang Ben, Li China University of Petroleum-Beijing Beijing China Engineering Technology R&D Company Limited CNPC Beijing China Bohai Drilling Engineering Company Limited CNPC China

ISBN: (纸本)9781713867821

Hydraulic fracturing is one of the most effective ways to promote oil and gas production, especially for unconventional hydrocarbon resources. However, for some unconventional reservoirs, such as ultra-deep tight sandstone formation and local stress intensified shale formation, the fracture initiation pressure is extremely high thus impeding hydraulic fracture initiation and extension. This paper provides a new hydraulic Pre - pressurized approach for the deduction of fracture initiation pressure. The 8 cm × 8 cm × 10 cm cuboid rock matrix was used to investigate the effect of pre-pressurized Pore pressure on the hydraulic fracture initiation pressure. results showed that as the pore pressure increased, the fracture initiation pressure decreased and a critical pre-pressurized pore pressure value existed. If the pore pressure exceeds this value, the hydraulic fracture initiation pressure would not be reduced. The hydraulic pressurized rate would decrease with the increase of pre-pressurized pore pressure. CT scan was also conducted and it indicated that the number of initialized hydraulic fractures around the wellbore has a positive relationship with the value of pre-pressurized pore pressure. Some additives such as acid and surfactant were also added to the fracturing fluid, according to the pre-pressurized experiments. The fracturing fluid with acid can reduce the fracture initiation pressure on a relatively big scale, while the fracturing fluid with surfactant can increase the complexity of hydraulic fracture networks. The experimental results clarify the mechanism of "pre-pressurized " to reduce rock fracture pressure, and form the optimization method of "pre-pressurized " modification fluid system formula regulation. The research results can provide a reference for field optimization of modification fluid system. © Geology resource Management and Sustainable development *** rights reserved.

关键词： Hydraulic fracturing

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Comprehensive Evaluation of a Novel recrosslinkable Preformed Particle Gel for CO2 Sweep Efficiency and Storage Improvement 84

Comprehensive Evaluation of a Novel Recrosslinkable Preforme...

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84th EAGE Annual Conference and Exhibition

作者： Bai, B. Long, Y. Al Brahim, A. Missouri University of Science and Technology United States CNPC Engineering Technology R&D Company Limited China

ISBN: (纸本)9781713884156

To overcome the inherent inferiors of pristine particle gel and in-situ polymer gels, such as the extrusion, dehydration, mechanical vulnerability and thereof defects, a new class of particle gels that can recrosslink at subterranean conditions, wherein maintaining stable in supercritical CO2, is described in this work. The newly developed particle gel is called CO2 resistant re-crosslinked preformed particle gel (CO2-rPPG). After being placed into target zone, the particles accumulate in the fractures or conduits and then self-recrosslink into a rubber-like bulk gel, which can block the target zone or bypassing zone, and thereby divert the chased fluid (e.g., CO2 or water) to the unswept zone. Therefore, the CO2-rPPG can be used to plug the preferential fluid flow channels in CO2 injection reservoirs and thus improve CO2 sweep efficiency and storage efficiency. In this paper, we will provide a comprehensive evaluation for the novel particle gel to tell where if it can used for CO2 flooding and storage projects for better plugging efficiency. results show the novel polymer particle gel provides a novel and cost-effective tool to control CO2 injection performance, improve sweep efficiency and storage efficiency for CO2 storage and EOr projects. © 2023 84th EAGE Annual Conference and Exhibition. All rights reserved.

关键词： Carbon dioxide

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A Novel Methodology to Improve Wellbore Integrity via reliable Barriers: Integration of remote Wireless Zonal Water Injection and Intelligent Water Control

A Novel Methodology to Improve Wellbore Integrity via Reliab...

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2023 Offshore technology Conference Brasil, OTCB 2023

作者： Jin, Fu Longlian, Cui Bingshan, Liu Guobin, Zhang Chen, Chen CNPC Engineering Technology R&D Company Ltd China

ISBN: (纸本)9781959025023

More and more deep horizontal wells have been drilled over all the world, strata with much higher temperature are discovered, which increases the risk to wellbore integrity and has driven the evolution of zonal isolation methods. New methods aim to ensure that the completion equipment deployed by operating companies can guarantee the integrity of oil wells throughout their entire lifecycle. Several globally renowned oilfield service companies are actively developing mechanical, fluid activation, and chemical solutions to address the increasingly challenging downhole conditions. Meanwhile, the industry is increasingly recognizing the importance of employing precise water injection and water control technologies to enhance wellbore integrity of oil and gas producers. As oil and gas fields reach a certain stage of development, the heterogeneity between layers becomes more prominent, leading to interlayer conflicts. due to significant variations in geological characteristics among strata, which affect the degree of water flooding control in practice, it is necessary to implement zonal water injection techniques. Wireless intelligent water distributors utilize pressure or flow fluctuations to transmit signals, enabling control of the opening of downhole water distributors to adjust injection rates. The digital data transmission eliminates the need for human intervention, greatly reducing operational costs and saving time and effort. Compared to conventional water distributors, these instruments demonstrate higher efficiency and accuracy in intelligent zonal water injection. They perform regular tests on the flow rates of each individual layer, allowing for a better understanding of water absorption conditions and pressure variations across the well. This achievement aligns with the goal of achieving sufficient and proper water injection for waterflooding development, thereby enhancing the effectiveness of water injection and facilitating precision waterflooding in oilfie

关键词： Oil field equipment

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