检索结果-内蒙古大学图书馆

作者： Hua Zhang Jianzhou Jin Shuoqiong Liu Fengzhong Qi Yongjin Yu Ming Xu Jinping Yuan Zhiwei ding Chongfeng Zhou Chi Zhang Zishuai Liu Yusi Feng Yuchao Guo

标准号: US11618844(B2)

The invention provides a high temperature resistant Portland cement slurry and a production method thereof. The high temperature resistant Portland cement slurry comprises the following components by weight: 100 parts of an oil well Portland cement, 60-85 parts of a high temperature reinforcing material, 68-80 parts of fresh water, 1-200 parts of a density adjuster, 0.1-1.5 parts of a suspension stabilizer, 0.8-1.5 parts of a dispersant, 3-4 parts of a fluid loss agent, 0-3 parts of a retarder and 0.2-0.8 part of a defoamer. The high temperature resistant Portland cement slurry has a good sedimentation stability at normal temperature, and develops strength rapidly at a low temperature. The compressive strength is up to 40 MPa or more at a high temperature of 350° C., and the long-term high-temperature compressive strength develops stably without degradation. Therefore, it can meet the requirements for field application in heavy oil thermal recovery wells, reaching the level of Grade G Portland cement for cementing oil and gas wells.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Field Test of Lithium Extraction in Oilfield Associated Water: A Case Study of YQ Treatment Station

Field Test of Lithium Extraction in Oilfield Associated Wate...

引用

2024 Abu dhabi International Petroleum Exhibition and Conference, AdIPEC 2024

作者： Miao, Xinyue Wen, Zhang ren, Yongcang Wang, Min Wang, Kelin Zhao, Zhiyong Liu, Zhiming Han, Guoqiang Ma, rui Chen, Xin Zhang, Lei deng, Qianxing Tarim Oilfield Company CNPC Xinjiang Province Korla City China Engineering Research Center for Ultra-deep Complex Reservoir Exploration and Development Xinjiang Uygur Autonomous Region Xinjiang Province Korla City China R&D Center for Ultra Deep Complex Reservior Exploration and Development CNPC Xinjiang Province Korla City China Southwest Petroleum University Sichuan Province Chengdu City China Xinjiang Key Laboratory of Ultra-deep Oil and Gas Xinjiang Province Korla City China Shanghai Huiliyuan Technology Co. Ltd. Shanghai City China BGP CNPC Hebei Province China

ISBN: (纸本)9781959025498

The oilfield associated water is complex in composition and poses significant hazards, necessitating treatment to prevent environmental pollution. Taking the Yingqian Treatment Station as an example, it processes approximately 2,400m3 of water daily. Sampling and testing revealed that the total hardness of the water exceeds 20,000mg/L, with a Mg2+ concentration of about 1,200mg/L. Most importantly, the Li+ concentration reached 150mg/L, meeting the requirements for economic development (≥50mg/L). Consequently, related research and experiments were promptly initiated. Owing to the associated water's high total hardness and low lithium content, which significantly differ from saturated brine, traditional lithium extraction techniques cannot be directly applied. In response, research has identified that manganese-based adsorbents offer the advantage of high adsorption capacity, but require concentrated acid for desorption. Conversely, bipolar membrane electrodialysis has the merit of producing lithium products with high purity;however, the byproduct concentrated acid is a hazardous chemical that necessitates proper disposal. Consequently, a combined technological approach has been proposed to leverage the strengths of both methods. The lithium extraction experiment from oil-gas field associated water at the YQ Treatment Station in China was conducted from May to June 2023, successfully producing 2.05kg of monohydrate lithium hydroxide from 116m3 of associated water. However, the experiment encountered numerous issues. For instance, the LiCl solution after a single desorption with HCl failed to meet the feed concentration requirements for subsequent processes. After extensive argumentation, the solution was adjusted by using a mixture of LiCl and HCl from the first desorption to replace HCl as the desorbent, and adjusting the desorption process from one stage to two, thereby increasing the LiCl concentration. The daily production of associated water in blocks such as Yi

关键词： Gas industry

来源：评论

学校读者我要写书评

暂无评论

Traceable ring signature schemes based on SM2 digital signature algorithm and its applications in the data sharing scheme

引用

Frontiers of Computer Science 2024年第2期18卷 251-253页

作者： Yongxin ZHANG Hong LEI Bin WANG Qinghao WANG Ning LU Wenbo SHI Bangdao CHEN Qiuling YUE R&D Department SSC Holding CompanyLtd.Chengmai 571924China School of Cyberspace Security(School of Cryptography) Hainan UniversityHaikou 570228China College of Computer Science and Engineering Northeastern UniversityShenyang 110819China School of Computer Science and Technology Xidian UniversityXi'an 710071China Blockchain Research Group Oxford-Hainan Blockchain Research InstituteChengmai 571924China

1 Introduction Identity privacy concerns hinder data sharing by casting doubt on the safeguarding of personal information,eroding trust,and impeding the willingness of individuals and organizations to exchange their data[1,2].The traceable ring signatures(TrSs)addresses the contradiction between identity privacy and regulation[3],no scheme has been developed thus far that is based on SM2,the Chinese cryptographic public key algorithm standard,without relying on centralized trust.

关键词： SM2 signature scheme

来源：评论

学校读者我要写书评

暂无评论

Injectivity decline Under Langmuirian Pore Blocking: Analytical Model and Field Cases

SSRN

引用

SSrN 2023年

作者： Liu, Huifeng Osipov, Yuri Yuan, Zebo Chen, Zhangxin Liu, Qi Liu, Bingshan CNPC R&D（DIFC）Company Limited Dubai United Arab Emirates Moscow State University of Civil Engineering Moscow Russia PetroChina Tarim Oilfield Company Xinjiang Korla China Department of Chemical and Petroleum Engineering University of Calgary CalgaryAB Canada CNPC Engineering Technology Research and Development Company Limited Beijing China

The well injectivity decline during waterflooding is a widespread phenomenon. The reason is that injected particles retain in pores and block flow channels in near-wellbore regions, yielding permeability decline. A predictive model for this phenomenon is useful for technology development of damage prevention, mitigation or removal. Previous works assume constant filtration coefficient while long-time accumulation of captured particles can cause significant variation of filtration coefficient, strongly affecting the permeability and injectivity decline. In this paper, an analytical model for radial suspension transport in porous media is based on the Langmuirian blocking filtration function, where the particle capture probability linearly depends on the retained concentration. The solution is obtained as an asymptotic expansion using the dimensionless distance from wellbore as a small parameter. The exact expression of retained particle concentration at the concentration front is also obtained. For comparison, numerical solutions are also obtained by Shampine’s code, which is based on the explicit central finite deference method. Comparisons between the analytical and numerical solutions of retained particle concentration show that their difference errors do not exceed 5% in waterflooding conditions. Based on the analytical solution of retained particle concentration, expressions of injection pressure, skin factor and damaged zone radius are also derived. True water injection and damage removal treatment data from Tarim Oilfield, western China, is used to test the analytical solutions of damaged zone radius. It shows that the calculated results are basically consistent with the actual situation. The analytical expressions in this paper can be used for predicting the damage extent of an injector and quantitatively optimizing an acidizing job by estimating the required acid volume to remove the damage. © 2023, The Authors. All rights reserved.

关键词： Analytical models

来源：评论

学校读者我要写书评

暂无评论

Optimization calculation method of ultra-deep production logging velocity profile correction coefficient 6

Optimization calculation method of ultra-deep production log...

引用

6th International Conference on Internet of Things, Automation and Artificial Intelligence, IoTAAI 2024

作者： Wang, Huawei Zhu, Lei Liu, Xianyuan Liu, Zhizhen Zhou, Wenyuan Tian, Longmei Song, Wenguang Tarim Oilfield Company PetroChina Xinjiang Korla841000 China Cnpc R&d Center for Ultra-Deep Complex Reservoir Exploration and Development Xinjiang Korla841000 China Engineering Research Center for Ultra-Deep Complex Reservoir Exploration and Development Xinjiang Uygur Autonomous Region Xinjiang Korla841000 China Guangdong Ocean University School of Computer Science and Engineering Yangjiang529500 China

ISBN: (纸本)9798350386974

In recent years, with the continuous development of China's industry, the country's demand for petroleum energy has also increased. Therefore, maintaining stable production in oil fields is crucial for ensuring the stable development of the Chinese economy. dynamic monitoring of production logging is an important means of stabilizing and increasing oil and gas production. Generally, the flow rate values of fluids in each production layer in the production wellbore are measured using a turbine flowmeter. When measuring flow in the production wellbore using a turbine flowmeter, it is placed at the center of the wellbore fluid due to supporting equipment. The flow value measured by the turbine flowmeter is the flow value at the center of the wellbore. during the measurement process, when the turbine flowmeter is centered, it reflects the velocity Va of the fluid in the middle of the casing wellbore. In order to accurately obtain the cross-sectional flow rate value of the wellbore, it is necessary to measure the velocity value Vm of the fluid in the cross-section of the casing wellbore. At this point, dividing Vm by Va is denoted as Cv. The traditional method takes Cv as a constant value of 0.83. By studying the fluid velocity value in ultra deep production logging, it was found that the value Cv is not a constant value of 0.83. This value is closely related to the wellbore inner diameter, the ratio of turbine blade diameter to wellbore inner diameter, fluid density value, fluid viscosity value, and average fluid velocity value. This article designs an iterative optimization calculation method to calculate the Cv value. Comparing and analyzing the results of iterative optimization calculation with experimental values, it was found that the calculation accuracy of this method reached 97%. It can fully meet the requirements of calculating the fluid velocity value in the wellbore for production logging. © 2024 IEEE.

关键词： Oil well logging

来源：评论

学校读者我要写书评

暂无评论

Green Preparation of Force-Sensitive Micro-Capsules and Their Application in Self-Healing of Cement Sheath

SSRN

引用

SSrN 2024年

作者： Zhang, Chi Xia, Xiujian Zhai, Xianzhi Ying, Yujie Hu, Miaomiao Guo, Jintang School of Chemical Engineering and Technology Tianjin University Tianjin300350 China CNPC Engineering Technology R&D Company Limited Beijing102206 China Zhejiang312300 China Haihe Laboratory of Sustainable Chemical Transformations Tianjin300051 China Beijing University of Chemical Technology China

Micro-capsule has been considered the most promising self-healing material, while the complex and high temperature polymerization process, and environmental unfriendly raw materials limits its wide application. Herein, the green micro-capsule composed of epoxy resin and calcium alginate were prepared at room temperature via needle drop method,O/W/O emulsion method and spraying method. The effects of preparation methods on the water absorption, encapsulation rate of micro-capsules were revealed, and the differences in the self-healing efficiency of cement containing these green micro-capsules were also studied. Among all samples, the micro-capsules prepared by O/W/O emulsion method (MCE-2) owned the highest water absorption 60.13% and the highest epoxy resin content 48.1%. Compared with the blank samples, adding micro-capsules improved the liquidity of cement slurry and facilitated the hydration process, related to the release of extra water. While, the micro-capsules caused additional defects in the cement matrix and weakened the compressive strength of cement. In the self-healing measurement, the composites with MCE-2 showed the biggest mass transfer pressure and least permeability before and after repair. The higher water absorption of MCE-2 significantly increased greater mass transfer resistance to block the erosion of external fluids before repair, and the higher epoxy resin content could ensure stronger sealing effect after repair, achieving the best self-healing performance. © 2024, The Authors. All rights reserved.

关键词： Water absorption

来源：评论

学校读者我要写书评

暂无评论

research and Application of Micro-Expansion and Anti-Channeling Cement Slurry System in Agadem Oilfield

Research and Application of Micro-Expansion and Anti-Channel...

引用

2021 Abu dhabi International Petroleum Exhibition and Conference, AdIP 2021

作者： Wang, Gang duan, dexiang Li, Wanjun Qian, Feng Qin, Zhengli Zhong, Zhao Zhou, Chuan Bahedaer, Baletabieke Jing, Ning Ye, dongqing Gao, Qingyun Xiao, Yue Li, Ganlu Liu, Jitong Zhang, Guobin Li, Shaohua CNPC Engineering Technology R and D Company Limited China National Oil and Gas Exploration and Development Company Ltd China College of Petroleum Engineering China University of Petroleum Beijing China CNPC Greatwall Drilling Company

ISBN: (纸本)9781613998342

The overall liner cementing qualification rate is only 40% in Agadem block of Niger, The cement slurry system used in the field has a UCA transition time of 43min, and an expansion rate of -0.03% in 24h, which result in a poor anti-gas channeling performance. The expansive agent and the anti-gas channeling toughening agent of anti-channeling agent were optimized through experiment study. A novel micro-expansion anti-gas channel cement slurry system which is suitable for Agadem block was obtained through experiment optimization study: 100% G +2 ∼ 4% fluid loss agent +3 ∼ 4.5% anti-channeling agent +1 ∼ 2% expansion agent-100S +0.15 ∼ 0.4% retarder +0 ∼ 0.3% dispersant +0 ∼ 0.25% defoamer + water. This new cement system has a good anti-gas channeling performance, the cement strength is 24.5-35.0MPa after 24hrs, the UCA transition time is 16-18min, and the expansion rate is 1.5-1.7%. At the same time, a cementing prepad fluid suitable for the block and the micro-expansion cement slurry system is selected to ensure the performance of the cement slurry's anti-channeling performance. The field test results proofs the good performance of the new cement system. The cementing qualification rate of Koulele W-5 well is 96%, and the second interface cementation is Good. The cementing qualification rate of Trakes CN-1 well is 100% which second interface cementation is Excellent. This paper has positive guidance and reference for cementing in Agadem block. © Copyright 2021, Society of Petroleum Engineers

关键词： Expansion

来源：评论

学校读者我要写书评

暂无评论

development and Performance Evaluation of a New Type of Temperature resistant Surfactant for Ultra-deep Well Casing Flushing

SSRN

引用

SSrN 2024年

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

during the ultra-deep well drilling process, drilling fluid tends to remain in the casing, contaminating it and affecting the progress of completion engineering. To address this issue, a screening method was employed to select non-ionic surfactants, with fatty alcohol polyoxyethylene ether (AEO-7) being chosen among various types. To overcome the temperature resistance issue of AEO-7, Phthalic anhydride (PA) was introduced into AEO-7, and neutralization reaction with NaHCO3 was carried out to synthesize a novel surfactant (SEO). High-temperature and high-pressure precipitation testing equipment and high-temperature cleaning equipment were set up to study the temperature-resistant cleaning performance of SEO. results indicate that surfactant SEO maintains good solubility in high-temperature environments in the solution through ionic bonding. At 200°C, the cleaning efficiency of SEO solution for different types of drilling fluid residues exceeds 95%. Additionally, SEO adsorption on metal surfaces can inhibit Cl- corrosion. Combined with micro-mechanism characterization results, SEO can disperse solid particles, adsorb organic phases, reduce interfacial tension, and achieve efficient cleaning. Field experimental results show that the surface tension retention rate of well-flushing fluid after cleaning is 95.8%, with a solid particle content of 5.4g/L, meeting onsite requirements and broad application prospects. © 2024, The Authors. All rights reserved.

关键词： Surface active agents

来源：评论

学校读者我要写书评

暂无评论

A distortion model test method of the casing string system considering FSI

Journal of Engineering Research (Kuwait)

引用

Journal of engineering research (Kuwait) 2024年

作者： Qi, Linshan Yin, Yiyong Wang, Liyan Qu, Congfeng Liu, Binhui Yang, Shuofei College of Engineering China Agricultural University Beijing 100083 China CNPC Engineering Technology R&D Co. Ltd Beijing 102206 China

To solve the problem of prototype test's high cost and difficulty of the casing string system in shale gas horizontal wells, this paper proposes a large-scale distortion model test method for the casing string system. Firstly, the elastic centralizer is simplified as elastic support, and the dynamic model of casing string system is established by finite element method. Then, the test platform of casing string system is designed and built. The modal test results show that the maximum error of the first five natural frequencies between the numerical calculation and the test results is 5.12 %, which verifies the correctness of the dynamic model of casing string system. On this basis, the distortion model's constant power similarity law (CPSL) and power function similarity law (PFSL) are obtained by the dimensional analysis method and the least square method. The CPSL and PFSL are used to predict the vibration characteristics of the prototype casing string system by distortion models with different scaling ratios. The calculation and analysis show that the prediction accuracy of the PFSL is higher than CPSL's with the same scaling ratio, and the PFSL can accurately predict natural frequency of the prototype casing string system within a large-scale distortion range and greatly reduce the test cost. © 2024 The Authors

关键词： Applicable interval Casing string Finite element model Natural frequency Similarity law

来源：评论

学校读者我要写书评

暂无评论

Influence of Fractures on CO2 Huff-n-Puff Effect of Staged Fractured Horizontal Wells in Tight Oil reservoirs 11th

Influence of Fractures on CO2 Huff-n-Puff Effect of Staged F...

引用

11th International Field Exploration and development Conference, IFEdC 2021

作者： Zhou, Tuo Zhong, Zhao Chen, Chi Yang, Hui Xiao, Yue Baletabieke, Bahedaer Kong, Xiang-ji Zhou, Chuan Xiang, Ying Gao, Qing-yun Tian, Yajie CNPC Engineering Technology R&D Company Limited Beijing China Exploration Division PetroChina Southwest Oil and Gasfield Company Chengdu China China Petroleum Technical Service Corporation Limited Beijing China China National Oil and Gas Exploration and Development Company Ltd. Beijing China Research Institute of Petroleum Exploration and Development Beijing China

ISBN: (纸本)9789811921483

Tight oil has become a new growth point for global oil and gas reserves and production. Conventional tight oil reservoirs are mainly developed in depletion mode, and water flooding cannot effectively supplement formation energy. CO2 has strong advantages in terms of elasticity, mutual solubility with crude oil, etc., and is considered to be an effective way to supplement energy. At present, staged fracturing of horizontal wells has gradually become the main development method for tight oil reservoirs, but it still fails to meet production requirements. In this paper, taking the Chang 8 tight oil reservoir in the Ordos Basin as an example, it is the first time to use a combination of physical simulation and numerical simulation, and use an original large-scale physical simulation experiment system to focus on the impact of fractures on the CO2 huff-n-puff effect of staged fractured horizontal wells in tight oil reservoirs. Through the original large-scale physical simulation experiment system (which can simulate a 50 * 50 * 6 cm core), using a combination of physical simulation and numerical simulation to analyze the impact of fractures on the CO2 huff-n-puff effect of horizontal wells with staged fracturing. Studies have shown that fracture length and fracture density are the main controlling factors that affect the CO2 huff-n-puff effect of staged fracturing horizontal wells, and reasonable fracture parameters are the key to improving development efficiency. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Fracture

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：