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The construction of pseudo-Janus silica/surfactant assembly and their application to stabilize Pickering emulsions and enhance oil recovery

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Frontiers of Chemical Science and Engineering 2022年第7期16卷 1101-1113页

作者： Han Jia Jiajun Dai Tingyi Wang Yingbiao Xu Lingyu Zhang Jianan Wang Lin Song Kaihe Lv Dexin Liu Pan Huang shandong Key Laboratory of oilfield Chemistry School of Petroleum EngineeringChina University of Petroleum(East China)Qingdao 266580China Key Laboratory of Unconventional Oil&Gas Development(china University of Petroleum(East china)) Ministry of EducationQingdao 266580China Technology Inspection Center Shengli Oilfield CompanySINOPECDongying 257000China Department of Chemical and Materials Engineering University of Alberta EdmontonAB T6G 1H9Canada

Nanoparticles with high surface energy and chemical activity have drawn substantial attention in petroleum industry. Recently, Janus nanoparticles exhibited tremendous potential in enhanced oil recovery (EOR) due to their asymmetric structures and properties. In this study, a series of amphiphilic pseudo-Janus@OTAB (PJ@C18) nanoparticles with different concentrations of stearyltrimethylammoium bromide (OTAB) were successfully fabricated. The structures and properties of PJ@C18 were characterized by Fourier transform infrared spectroscopy and ζ-potential measurements. Based on the emulsification experimental results, the interaction models and the self-assembly behavior between hydrophilic nanoparticles (SiO_(2)@NH_(2)) and OTAB molecules at the oil/water interface were proposed, which was further confirmed via the measurements of the contact angle and dynamic interfacial tension. Interestingly, it was found that the change of pH value from 7.5 to 4.0 caused the type reversal of the PJ@C18-1000 stabilized Pickering emulsions. Furthermore, the PJ@C18-1000 stabilized Pickering emulsion system with excellent salt and temperature tolerances (10000 mg∙L^(–1), 90℃) significantly improved the oil recovery in the single-tube (more than 17%) and double-tube (more than 25%) sand pack model flooding tests. The findings of this study could help to better understand the construction mechanism of pseudo-Janus silica/surfactant assembly and the potential application of PJ@C18-1000 stabilized Pickering emulsions for EOR.

关键词： Janus nanoparticles surfactant double phase inversion self-assembly enhanced oil recovery

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A novel numerical simulation of CO_(2) immiscible flooding coupled with viscosity and starting pressure gradient modeling in ultra-low permeability reservoir

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Frontiers of Earth Science 2023年第3期17卷 884-898页

作者： Jie CHI Binshan JU Jiabei WANG Xing ZHANG Wenbin CHEN Mengfei ZHANG School of Big Data and Fundamental Sciences Shandong Institute of Petroleum and Chemical TechnologyDongying 257061China School of Energy Resources China University of Geosciences(Beijing)Beijing 100083China Key Laboratory of Geological Evaluation and Development Engineering of Unconventional Natural Gas Energy Beijing 100083China School of Petroleum Engineering Chongqing University of Science&TechnologyChongqing 401331China Research Institute of Petroleum Engineering Technology Shengli Oilfield CompanySINOPECDongying 257000China

CO_(2) immiscible flooding is an environmentally-friendly and effective method to enhance oil recovery in ultra-low permeability reservoirs.A mathematical model of CO_(2) immiscible flooding was developed,considering the variation in crude oil viscosity and starting pressure gradient in ultra-low permeability reservoirs based on the non-Darcy percolation *** mathematical model and numerical simulator were developed in the C++language to simulate the effects of fluid viscosity,starting pressure gradient,and other physical parameters on the distribution of the oil pressure field,oil saturation field,gas saturation field,oil viscosity field,and oil *** results showed that the formation pressure and pressure propagation velocity in CO_(2) immiscible flooding were lower than the findings without considering the starting pressure *** formation oil content saturation and the crude oil formation viscosity were higher after the consideration of the starting pressure *** viscosity of crude oil considering the initiation pressure gradient during the formation was higher than that without this gradient,but the yield was lower than that *** novel mathematical models helped the characterization of seepage resistance,revealed the influence of fluid property changes on seepage,improved the mathematical model of oil seepage in immiscible flooding processes,and guided the improvement of crude oil recovery in immiscible flooding processes.

关键词： viscosity starting pressure gradient flow simulation CO_(2)immiscible flooding ultra-low permeability reservoir

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Numerical study on the effect of reservoir heterogeneity and gas supply on hydrate accumulation in subsea shallow formations

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Petroleum Research 2021年第2期6卷 91-115页

作者： Liang Zhang Rong Feng Songhe Geng Xin Li Fangping Yan Shaoran Ren School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580China Key Laboratory of Unconventional Oil&Gas Development(china University of Petroleum(East china)) Ministry of EducationQingdao 266580China Zhongyuan oilfield SinopecPuyang457000China Lusheng Company Shengli OilfieldSinopecDongying257000China Department of Petroleum Engineering Chengde Petroleum College067000China

Seepage-type gas hydrate accumulation in subsea shallow formations involves complicated thermohydro-solid coupling processes and matching problem between various accumulation *** physical properties control local natural gas migration pathway and thus the final reservoircharacteristics of *** this paper,a novel mixed-flux model for gas hydrate accumulation isestablished and then used to simulate the process of methane gas migration into the shallow stratum toform a hydrate *** effects of reservoir heterogeneity and gas source conditions on the distribution of pore fluid and hydrate accumulation are *** simulation results show thatreservoir heterogeneity is conducive to the retention and lateral migration of CH4 in a hydrate ***4 can contact more pore water to form a large hydrate reserve,but the formed hydrate is ***-permeability layers enhance the trapping of CH4 and form a uniform and large ***,gas source conditions have an important impact on the hydrate accumulation *** gas flux,small pore water flux,continuous gas supply,high content of heavy components in natural gas,and numerous gas source points contribute to large amounts of hydrates generationin a certain time *** presented work will deepen our understanding of the controls of natural gashydrate systems in subea shallow formations.

关键词： Hydrate accumulation Mixed-flux model Reservoir simulation Reservoir heterogeneity Gas source condition

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Nanoparticle stabilized emulsion with surface solidification for profile control in porous media

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Petroleum Science 2022年第2期19卷 800-808页

作者： Yi-Ning Wu Xiang Yan Ke Xu Ruo-Yu Wang Meng-Jiao Cao Xiao-Da Wang Yuan Li Cai-Li Dai shandong Key Laboratory of oilfield Chemistry School of Petroleum EngineeringChina University of Petroleum(East China)Qingdao266580PR China Key Laboratory of Unconventional Oil&Gas Development China University of Petroleum(East China)Ministry of EducationQingdao266580PR China Department of Energy and Resources Engineering College of EngineeringPeking UniversityBeijing100871China Dongxin Oil Production Plant Shengli Oilfield CompanySINOPECDongying257000China College of Chemical Engineering Fuzhou UniversityFuzhou350116China

Profile control is utilized to redirect the injection water to low permeability region where a large amount of crude oil *** gel particles are the commonly used agent for redistributing water by blocking the pores in high permeability *** the capability of deep penetration of performed gel particles is ***,we formulate nanoparticle stabilized emulsion(NSE).The stability and the effect of NSE on the fluid redirection in a three-dimensional porous medium were *** usingμ-PIV(particle image velocimetry),it was found that the velocity gradient of continuous fluid close to the nanoparticle stabilized droplets is much higher than that close to surfactant stabilized *** behaves as solid particle in preferential seepage channels,which will decrease effectively the permeability,thereby redirecting the subsequent injection ***,NSE shows high stability compared with emulsion stabilized by surfactant in static and dynamic *** addition,water flooding tests also confirm that the NSE can significantly reduce the permeability of porous media and redirect the fluid *** results demonstrate NSE owns high potential to act as profile control agent in deep formation.

关键词： Nanoparticles Emulsion stability Flow behavior Coalescence Profile control

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Investigation of regulating rheological properties of water-based drilling fluids by ultrasound

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Petroleum Science 2021年第6期18卷 1698-1708页

作者： Wei-An Huang Jing-Wen Wang Ming Lei Gong-Rang Li Zhi-Feng Duan Zhi-Jun Li Shi-Fu Yu School of Petroleum Engineering China University of Petroleum(East China)Qingdao266580ShandongChina sinopec.shengli Petroleum Engineering Co. Ltd.Drilling Technology Research InstituteDongying257017ShandongChina Oil and Gas Technology Research Institute of Changqing oilfield Branch Xi'an710018ShaanxiChina Key Laboratory of Unconventional Oil&Gas Development China University of Petroleum(East China)Qingdao266580ShandongChina sPetrochina Daqing oilfield Co. Ltd.Research Institute of Oil Production EngineeringDaqing163000HeilongjiangChina

Regulating rheological properties of water-based drilling fluids has always been a hot *** paper proposed a new method for regulating rheological properties of water-based drilling fluids by ultrasonic *** experimental results showed that the ultrasound increased the viscosity and yield point of bentonite suspension by reducing the particle size of clay,destroying the network structure between clay particles,increasing the mud yield and the cation exchange capacity of bentonite,and promoting the hydration dispersion of *** change of rheological property showed a memory effect at room temperature and high ***,the ultrasonic energy affected the network structure between clays and polymer chains,thus regulating the rheological properties of the bentonite-polymer *** two types of drilling fluids investigated,the rheology of the poly-sulfonate drilling fluid was regulated by damaging the grid structure between additives and clays by low-power ultrasound and reducing the clay particle size by high-power ultrasound,while the rheology of the deep-water drilling fluid was mainly regulated by disentangling the spatial grid structure between ***,ultrasound showed no effect on the lubricity,inhibition and stability of drilling fluids,which proved the feasibility of ultrasound to regulate rheological properties of water-based drilling fluids.

关键词： Ultrasound Suspension Water-based drilling fluid Rheological property

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Numerical simulation study on multiphase flow pattern of hydrate slurry

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Petroleum Science 2023年第6期20卷 3897-3917页

作者： Xiao-Fang Lv Feng Chen Jie Zhang Yang Liu Qian-Li Ma Hui Du Chuan-Shuo Wang Shi-Dong Zhou Bo-Hui Shi Shang-Fei Song Jing Gong Jiangsu Key Laboratory of Oil and Gas Storage&Transportation Technology Changzhou UniversityChangzhou213016JiangsuChina china Petroleum&Chemical Corporation Northwest oilfield Branch Petroleum Engineering Technology Research InstituteUrumqi830011XinjiangChina sinopec.shengli Oilﬁeld Company Dongying257001ShandongChina National Engineering Laboratory for Pipeline Safety/MOE Key Laboratory of Petroleum Engineering China University of Petroleum-Beijing102249BeijingChina

The research on the multiphase flow characteristics of hydrate slurry is the key to implementing the risk prevention and control technology of hydrate slurry in deep-water oil and gas mixed transportation *** paper established a geometric model based on the high-pressure hydrate slurry experimental *** model was used to carry out simulation research on the flow characteristics of gas-liquid-solid three-phase *** specific research is as follows:Firstly,the effects of factors such as slurry flow velocity,hydrate particle density,hydrate particle size,and hydrate volume fraction on the stratified smooth flow were specifically *** test obtained particle size has the most influence on the particle concentration *** slurry flow velocity is gradually increased based on stratified smooth *** flow patterns were observed and their characteristics were ***,increasing the slurry velocity to 2 m/s could achieve the slurry flow pattern of partial hydrate in the pipeline transition from stratified smooth flow to wavy *** the flow rate increases to 3 m/s,a violent wave forms throughout the entire *** on wave flow,as the velocity increased to 4 m/s,and the flow pattern changed to slug *** the particle concentration was below 10%,the increase of the concentration would aggravate the slug flow trend;if the particle concentration was above 10%,the increase of the concentration would weaken the slug flow trend,the increase of particle density and liquid viscosity would weaken the tendency of slug *** relationship between the pressure drop gradients of several different flow patterns is:slug flow>wave flow>stratified smooth flow.

关键词： Hydrate slurry Numerical simulation Multiphase flow Flow field distribution Flow pattern transition

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Total organic carbon content logging prediction based on machine learning:A brief review

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Energy Geoscience 2023年第2期4卷 100-107页

作者： Linqi Zhu Xueqing Zhou Weinan Liu Zheng Kong Institute of Deep-sea Science and Engineering Chinese Academy of SciencesSanyaHainan572000China Southern Marine Science and Engineering Guangdong Laboratory Zhuhai ZhuhaiGuangdong519000China CNOOC china Limited LtdShenzhen BranchShenzhen518054China Exploration and Development Research Institute Shengli Oilfield CompanySINOPECDongyingShandong257029China

The total organic carbon content usually determines the hydrocarbon generation potential of a formation.A higher total organic carbon content often corresponds to a greater possibility of generating large amounts of oil or ***,accurately calculating the total organic carbon content in a formation is very *** research is focused on precisely calculating the total organic carbon content based on machine *** present,many machine learning methods,including backpropagation neural networks,support vector regression,random forests,extreme learning machines,and deep learning,are employed to evaluate the total organic carbon ***,the principles and perspectives of various machine learning algorithms are quite *** paper reviews the application of various machine learning algorithms to deal with total organic carbon content evaluation *** various machine learning algorithms used for TOC content predication,two algorithms,the backpropagation neural network and support vector regression are the most commonly used,and the backpropagation neural network is sometimes combined with many other algorithms to achieve better ***,combining multiple algorithms or using deep learning to increase the number of network layers can further improve the total organic carbon content *** prediction by backpropagation neural network may be better than that by support vector regression;nevertheless,using any type of machine learning algorithm improves the total organic carbon content prediction in a given research *** to some published literature,the determination coefficient(R^(2))can be increased by up to 0.46 after using machine *** learning algorithms may be the next breakthrough direction that can significantly improve the prediction of the total organic carbon *** the total organic carbon content based on machine learning is of great significance.

关键词： Total organic carbon content Well logging Machine learning Backpropagation neural network Support vector regression

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Forward Simulation of Viscoelastic Wave Equation in Thin-lnterbedded Reservoir Model

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石油地球物理勘探 2009年第A2期44卷 106-113页

作者： Di Bang-rang Pei Zheng-lin Xia Ji-zhuang Wang Hui Bi Li-fei CNPC Key Lab of Geophysical Prospecting China University of Petroleum Beijing 100083 China Beijing North Lintai Petroleum Technology Co. Ltd Beijing 100192 China Institute for Geophysical Research of sinopec.shengli oilfield Co. Ltd Dongying Shandong Province 257022 China

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Study of the mechanisms of streamline-adjustment-assisted heterogeneous combination flooding for enhanced oil recovery for post-polymer-flooded reservoirs

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Petroleum Science 2019年第3期16卷 606-618页

作者： Qing-Jun Du Guang-Ming Pan Jian Hou Lan-Lei Guo Rong-Rong Wang Zhi-Zeng Xia Kang Zhou Key Laboratory of Unconventional Oil & Gas Development (china University of Petroleum (East china)) Ministry of Education Qingdao 266580 Shandong P. R. China School of Petroleum Engineering China University of Petroleum (East China) Qingdao 266580 Shandong P. R. China Bohai Petroleum Research Institution Tianjin Branch of CNOOC Ltd Tianjin 300452 P. R. China Research Institute of Exploration and Development Shengli Oilfield SINOPEC Dongying 257061 Shandong P. R.China

Streamline-adjustment-assisted heterogeneous combination flooding is a new technology for enhanced oil recovery for post-polymer-flooded *** this work,we first carried out a series of 2D visualization experiments for different chemical flooding scenarios after polymer ***,we explored the synergistic mechanisms of streamline-adjustment-assisted heterogeneous combination flooding for enhanced oil recovery and the contribution of each *** results show that for single heterogeneous combination flooding,the residual oil in the main streamline area after polymer flooding is ready to be driven,but it is difficult to be recovered in the non-main streamline *** to the effect of drainage and synergism,the streamline-adjustment-assisted heterogeneous combination flooding diverts the injected chemical agent from the main streamline area to the non-main streamline area,which consequently expands the active area of chemical *** on the results from the single-factor contribution of the quantitative analysis,the contribution of temporary plugging and profile control of branched preformed particle gels ranks in the first place and followed by the polymer profile control and the effect of streamline *** the contrary,the surfactant contributes the least to enhance the efficiency of oil displacement.

关键词： Plate sand-pack model Heterogeneous combination flooding Streamline adjustment Polymer flooding Displacement

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Origin of Overpressure and its Effect on Hydrocarbon Enrichment in the Hinterland of Junggar Basin,NW china

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Acta Geologica Sinica(English Edition) 2024年第6期98卷 1511-1532页

作者： HAN Zaihua LIU Hua LI Jun CHENG Bin ZHANG Hongrui MENG Xiangyu National Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)QingdaoShandong 266580China Laboratory for Marine Mineral Resources Qingdao Marine Science and Technology CenterQingdaoShandong266071China Petroleum Development Center Sinopec Shengli Oilfield CompanyDongyingShandong 257061China

Overpressure is widely developed in deep petroliferous strata in the hinterland of the Junggar ***,a comprehensive understanding of its origin and effect on hydrocarbon distribution and enrichment remains *** this study,we employ five empirical methods and comprehensive geological analysis to identify the origin of overpressure,and uncover the effect of overpressure on hydrocarbon *** results indicate that disequilibrium compaction is not a significant factor in overpressure ***,hydrocarbon generation,pressure transfer and diagenesis are the primary *** empirical methods support this *** is a positive correlation between overpressure intensity and source rock thickness and ***,widespread cross-formational migration of hydrocarbon bearing fluid occurred,with sandstone overpressure exceeding that of adjacent shale in non-source ***,there is a distinct transformation from smectite to illite near the top of *** generation pressurization and pressure transfer significantly effect hydrocarbon *** overpressure caused by hydrocarbon generation drives hydrocarbon migration and accumulation,establishing an optimal energy configuration between reservoir and cap *** play a crucial role in hydrocarbon vertical migration and pressure *** overpressure in reservoirs can reduce the porosity and permeability thresholds and enhance the charging capacity of oil and gas.

关键词： overpressure origin hydrocarbon generation pressure transfer diagenesis hydrocarbon enrichment Junggar Basin

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