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Quantitative investigation of nanofluid imbibition in tight oil reservoirs based on NMR technique

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Petroleum Science 2022年第5期19卷 2185-2198页

作者： Tian-Tian Zhang Zhi-Ping Li Caspar Daniel Adenutsi Yong-Zhou Wei Zhen-Fu Ma Qing You School of Energy Resources China University of GeosciencesBeijing10083China Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering Beijing10083China Core and Rock Properties Laboratory Department of Petroleum EngineeringFaculty of Civil and Geo-EngineeringKwame Nkrumah University of Science and TechnologyKumasiGhana Binnan oil production Plant Shengli Oilfield CompanySINOPECBinzhou256606ShandongChina Hekou oil production Plant Shengli Oilfield CompanySINOPECDongying257200ShandongChina

Nanofluids have been effective chemical additives for enhanced oil recovery(EOR)in tight oil reservoirs due to their special ***,oil imbibition recoveries vary for different *** oil/water distribution in rocks during imbibition using various nanofluids was less discussed in previous *** this study,we systematically examined the imbibition efficiencies of various nanofluids at60℃.Furthermore,the migration of nanofluids and oil distribution in the rock pores were monitored using nuclear magnetic resonance(NMR).The nanofluids were prepared by dispersing silica nanoparticles and five different types of surfactants i.e.,anionic-nonionic,anionic,nonionic,amphoteric and cationic surfactants in deionized(DI)***,interfacial tension(IFT)and contact angle measurements were conducted to reveal the underlying EOR mechanisms of various *** experimental results showed that the EOR potential of the different types of nanofluids was in the order anionic-nonionic>anionic>nonionic>amphoteric>cationic>***-nonionic(sodium lauryl ether sulfate(SLES))and anionic(sodium dodecyl sulfonate(SDS))nanofluids exhibited excellent capability of wettability alteration,and increased oil recovery by 27.96%and 23.08%,respectively,compared to *** NMR results also showed that mesopores(0.1-1μm)were the dominant developed pores in the rocks,and contributed the most to imbibition *** addition,the imbibition of nanofluids initially took place in mesopores and micropores before moving into *** study provides fundamental information on the selection of nanofluids for EOR in tight oil *** study also improved the understanding of oil/water distribution during the imbibition of the proposed nanofluids.

关键词： Nanofluids Spontaneous imbibition Nuclear magnetic resonance(NMR) oil migration Tight oil reservoir

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中国华南三水盆地发现氢气高异常渗出点

Science Bulletin 2024年第9期69卷 1217-1220页

作者：金之钧张盼盼刘润超黄晓伟王晓梅孟庆强刘金侠苏宇通张浩哲 Institute of Energy Peking UniversityBeijing 100871China Peking University Ordos Research Institute of Energy Ordos 017010China State Key Laboratory of Shale oil and Gas Enrichment Mechanisms and Effective Development Beijing 100083China School of Energy and Resources China University of GeosciencesBeijing 100083China Research Institute of Petroleum Exploration and Development China National Petroleum CorporationBeijing 100083China Sinopec Star company Limited Beijing 100083China

Natural hydrogen(H_(2))is also known as gold H_(2) and is a carbonfree energy resource with potential exploitation and utilization due to its renewable,environmentally friendly,and cost-effective characteristics[1].Natural H_(2) is distributed extensively worldwide,but varies in content in different regions and under varying geological *** present,only the H_(2) wells in Mali are used for economic production[2,3].

关键词： conditions friendly cost

Preparation and properties of physically and chemically cross-linked hybrid hydrophobic association hydrogels with good mechanical strength

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Science China Chemistry 2016年第3期59卷 282-292页

作者： Guoqing Jiang Li Huang Bo Li Quan Zhou Zhiying Li Enhanced oil Recovery Laboratory Exploration and Development Research InstituteDaqing Oilfield Company LimitedDaqing163712China State Key Laboratory of Enhanced oil Recovery Petrochina Research Institute of Petroleum Exploration&DevelopmentBeijing100083China production Engineering&Research Institute Daqing Oilfield Company LimitedDaqing163453China College of Chemistry Jilin UniversityChangchun130012China

To correct the defects of hydrophobic association hydrogels （HA-gels）, new physically and chemically cross-linked hybrid hy- drophobic association hydrogels （hybrid HA-gels） were prepared by radical copolymerization of acrylamide （AM）, octylphe- nol polyoxyethylene （n） acrylate （OPnAC, n stands for the number of ethoxy group, and is 10 and 21） and N,N＇-methylene- bisacrylamide （MBA）. On the basis of the statistical molecular theory of rubber elastic, the Mooney-Rivlin model and using the tensile true stress （O＇true） tested at room temperature, the number of network strands per unit volume （o~） and the num- ber-average molar mass of a network strand （Me） were evaluated for hybrid HA-gels. For the hydrogels, the effect of the con- tent of MBA and OP10AC on their tensile mechanical properties was studied by using o0 and Mc; also, the effect of the com- positions and temperature on their swelling behavior in distilled water was discussed in detail. In addition, hybrid HA-gels in- cluding a small quantity of MBA possessed the capabilities of secondary self-healing and remolding. In contrast with HA-gels prepared by the same compositions besides MBA, hybrid HA-gels showed good mechanical strength and long-term thermal stability in distilled water in the range of 25 to 80℃. Furthemore, hybrid HA-gels also avoided the self-deswelling behavior of HA-gels. The results show that the application fields of HA-gels will be greatly broadened after introducing a chemical cross-linking network.

关键词： hydrophobic association hydrogels hybrid hydrogels mechanical properties swelling behavior reforming capability

Hollow Rotor Progressing Cavity Pump Technique for oil production

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China oil & Gas 2002年第4期9卷 30-31页

作者： Cao Gangoil production Institute of Daqing oil Field company Ltd oil production Institute of Daqing oil Field company Ltd

Features of Hollow RotorProgressing Cavity Pump(HRPCP)(1) Keep the path forPCP *** over the producing wells quickly without shutting off the wells. Heat loss is low while the efficiency is high.

关键词：原油生产空心转子扩容泵技术洗井试蟛设备油田应用

New empirical scaling equations for oil recovery by free fall gravity drainage in naturally fractured reservoirs

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能源地球科学(英文) 2023年第3期4卷 233-251页

作者： Marzieh Alipour Mohammad Madani Department of Petroleum Engineering National Iranian South Oil Company(NISOC)AhvazIran Combined Planning Management National Iranian Oil CompanyTehranIran

Gas-oil gravity drainage is a recognized major contributor to production in fractured reservoirs. While various empirical and analytical methods have been proposed to model this process, many of them contain assumptions that are questionable or require parameters that are not accessible at the field level. The aim of this work is to provide new, easy-to-use scaling equations for estimating the recoverable oil through gravity drainage in naturally fractured reservoirs, considering the effects of resistance capillary pressure. To accomplish this, data from four oilfields undergoing gravity drainage, including rock properties (eight sets), block height (three sets), and fluid properties (four sets), were used to generate a wide range of recovery curves using a single porosity numerical simulation model. Aronofsky's and Lambert's functions were then utilized to match the generated recovery curves. Statistical analysis revealed that the Aronofsky's function is more accurate in replicating the recovery patterns, while the Lambert's function tends to overestimate the early-time oil recovery and underestimate the oil recovery at a later stage in the majority of cases. A sensitivity analysis was subsequently performed, revealing that parameters such as absolute permeability, viscosity of oil, height of block, gas and oil density, characteristics of relative permeability and capillary pressure curves and interfacial tension (IFT) influence the amount of time taken to achieve the final recovery. Of these parameters, absolute permeability has the most significant effect on the amount of time needed to attain the final recovery, while the effect of difference between oil and gas densities is the lowest. Consequently, two different expressions were developed using nonlinear multiple regression analysis of simulated gravity drainage data which can be combined with the Aronofsky model to substitute the rate convergence constant. The new scaling equations include the effects of capi

关键词： Scaling:Gravity drainage:oil Tecovery Reservoir simnulation Fractu ired reservoir

production calculation of the second and tertiary recovery combination reservoirs under chemical flooding

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Petroleum Exploration and Development 2021年第6期48卷 1403-1410页

作者： LIU Weidong WANG Gaofeng LIAO Guangzhi WANG Hongzhuang WANG Zhengmao WANG Qiang WANG Zhengbo State Key Laboratory of Enhanced oil Recovery Beijing 100083China PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China PetroChina Exploration&production company Beijing 100007China

Based on the analysis of the production composition of reservoirs developed by the second&tertiary recovery combination(STRC),the relationship between the overall output of the STRC project and the production level during the blank water flooding stage is *** to the basic principle of reservoir engineering that the“recovery factor is equal to sweeping coefficient multiplied by oil displacement efficiency”,the formula for calculating the ultimate oil recovery factor of chemical combination flooding reservoir was *** dividing the reservoir into a series of grids according to differen-tial calculus thinking,the relationship between the ultimate recovery factor of a certain number of grids and the recovery de-gree of the reservoir was established,and then the variation law of oil production rate of the STRC reservoir was *** concept of“oil rate enlargement factor of chemical combination flooding”was defined,and a production calculation method of reservoir developed by STRC was put forward based on practical oilfield development *** study shows that the oil production enhancing effect of STRC increases evenly with the in crease of the ratio of STRC displacement efficiency to water displacement efficiency,and increases rapidly with the increase of the ratio of recovery degree at flooding mode conversion to the water displacement *** is more effective in increasing oil production of reservoir with high recovery *** practical tests of the alkali free binary flooding(polymer/surfactant)projects,the relative error of the oil production calculation method of STRC reservoir is about±10%,which meets the requirements of reservoir engineering.

关键词： chemical combination flooding second&tertiary recovery combination oil displacement efficiency oil rate en-largement factor of chemical flooding oil production calculation

Innovative 3D Microfluidic Intestinal Organoid Model for Assessing Cadmium Bioavailability in Food: Implications for Enhanced Exposure Risk Assessment

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Food Science and Human Wellness 2024年

作者： Yan Li Wen Sun Qiao Wang Wan Shi Yu Chen Zhiyong Gong Xiao Guo Xin Liu Yongning Wu Key Laboratory of Animal Biological Products & Genetic Engineering， Ministry of Agriculture and Rural， Sinopharm Animal Health Corporation Ltd. State Key Laboratory of Novel Vaccines for Emerging Infectious Diseases， China National Biotec Group company Limited Key Laboratory for Deep Processing of Major Grain and oil (The Chinese Ministry of Education)， College of Food Science and Engineering， Wuhan Polytechnic University Department of Oncology， Xiangya Hospital， Central South University NHC Key Laboratory of Food Safety Risk Assessment， China National Center for Food Safety Risk Assessment

Given the severe toxicity and widespread presence of cadmium (Cd) in staple foods such as rice， accurate dietary exposure assessments are imperative for public health. In vitro bioavailability is commonly used to adjust dietary exposure levels of risk factors; however， traditional planar Transwell models have limitations， such as cell dedifferentiation and lack of key intestinal components， necessitating a more physiologically relevant in vitro platform. This study introduces an innovative three-dimensional (3D) intestinal organoid model using a microfluidic chip to evaluate Cd bioavailability in food. Caco-2 cells were cultured on the chip to mimic small intestinal villi's 3D structure， mucus production， and absorption functions. The model's physiological relevance was thoroughly characterized， demonstrating the formation of a confluent epithelial monolayer with well-developed tight junctions (ZO-1)， high microvilli density (F-actin)， and significant mucus secretion (Alcian blue staining)， closely resembling the physiological intestinal epithelium. Fluorescent particle tracking confirmed its ability to simulate intestinal transport and diffusion. The Cd bioavailability in rice measured by the 3D intestinal organoid model (9.07% ± 0.21%) was comparable to the mouse model (12.82% ± 3.42%) but significantly lower than the Caco-2 monolayer model (26.97% ± 1.11%). This 3D intestinal organoid model provides a novel and reliable strategy for in vitro assessment of heavy metal bioavailability in food， with important implications for food safety and risk assessment.

关键词：

THE FLOW PATTERNS OF BUBBLE PLUME IN AN MBBR

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Journal of Hydrodynamics 2011年第4期23卷 510-515页

作者： LI Shi-rong CHENG Wen WANG Meng CHEN Chen Key Laboratory of Northwest Water Resources and Environmental Ecology of Ministry of Education Xi＇an University of Technology Xi＇an 710048 China oil production Plant of No. 4 Changqing oilfield company China National Petroleum Corporation Jing Bian 718500 China

The flow patterns of the gas-liquid two-phase flow in a Moving-Bed Biofilm Reactor （MBBR） have a critical effect upon the mass transfer by the convection. Bubble plumes promote unsteadily fluctuating two-phase flows during the aeration. This article studies the unsteady structure of bubble plumes through experiments. The time-serial bubble plume images in various cases of the tank are analyzed. The Recursive Cross Correlation-Particle Image Velocimetry （RCC-PIV） is used to calculate the velocities in those cases, and then the time-serial vortex, the total turbulence intensity, the time-serial streamline are obtained. It is shown that the aspect ratio and the void fraction are the dominant factors influencing the unsteady structure of bubble plumes. When the aspect ratio is unity and the void fraction is high, the bubble plumes see a symmetrical vortex structure with a long residence time, which is beneficial for optimizing the aeration system and enhancing the applied range of bubble plumes.

关键词： bubble plume Recursive Cross Correlation (RCC) Particle Image Velocimetry (PIV) flow pattern

Microparticle Effect of Carbon Dioxide Hydrate Crystal Nucleus in Reaction Kettle

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Journal of Renewable Materials 2021年第4期9卷 651-669页

作者： Yujie Bai Youquan Huang Guangsheng Cao Xiaohan Nan Qingchao Cheng Lei Wang Tong Du MOE Key Laboratory for Enhanced oil and Gas Recovery Northeast Petroleum UniversityDaqingChina Petro China Jidong oilfield company TangshanChina oil production Engineering Research Institute of Daqing oilfield Petro ChinaDaqingChina School of Science Zhejiang UniversityHangzhou310000China

This study analyzed the partial effect of carbon dioxide hydrate in reaction kettle *** particle and bubble characteristics of the crystal nucleus during carbon dioxide hydrate decomposition were observed under the *** results showed that in the temperature range of 0.5℃–3.5℃,the pressure range of 3 MPa–5.5 MPa,phase characteristics in the reaction kettle changed in a complex fashion during carbon dioxide hydrate *** hydrate decomposition,numerous carbon dioxide bubbles were produced,mainly by precipitation at high temperatures or in the hydrate cage *** hydrate crystal nucleus initially exhibited fluidity in the ***,as the reaction progressed,the hydrate crystal nucleus migrated upward under the influence of gravity and carbon dioxide diffused into the aqueous ***,the hydrate was formed and accumulated,finally forming a solid carbon dioxide hydrate layer.

关键词： Carbon dioxide hydrate decomposition induction time particle characteristics