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An artificial intelligence approach for particle transport velocity prediction in horizontal flows

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Particuology 2024年第9期92卷 234-250页

作者： Haoyu Chen Zhiguo Wang Hai Huang Jun Zhang College of Petroleum Engineering Xi'an Shiyou UniversityXi'an710065China shaanxi key laboratory of carbon dioxide sequestration and enhanced oil recovery Xi'an710065China College of New Energy Xi'an Shiyou UniversityXi'an710065China Engineering Research Center of Smart Energy and carbon Neutral in oil&Gas Field Universities of Shaanxi ProvinceChina The Erosion/Corrosion Research Center The University of TulsaOK74104United States

Particle entrainment is an inevitable phenomenon in pipeline systems,especially during the development and extraction phases of oil and gas *** predicting the critical velocity for particle transport is a key focus for implementing effective sand control *** work presents a semi-supervised learning–deep hybrid kernel extreme learning machine(SSL-DHKELM)model for predicting the critical velocity,which integrates multiple machine learning theories including the deep learning approach,which is adept at advanced feature ***,the SSL framework enhances the model's capabilities when data availability is *** improved slime mould algorithm is also employed to optimize the model's *** proposed model has high accuracy on both the sample dataset and out-of-sample *** trained with only 10%of the data,the model's error still did not increase ***,this model achieves superior predictive accuracy compared to existing mechanistic models,demonstrating its impressive performance and robustness.

关键词： Particle transport Critical velocity Deep learning Semi-supervised learning Extreme learning machine

Proppant transport in rough fracture networks using supercritical CO_(2)

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Petroleum Science 2024年第3期21卷 1852-1864页

作者： Yong Zheng Meng-Meng Zhou Ergun Kuru Bin Wang Jun Ni Bing Yang Ke Hu Hai Huang Hai-Zhu Wang School of Petroleum Engineering Xi'an Shiyou UniversityXian710065ShaanxiChina shaanxi key laboratory of carbon dioxide sequestration and enhanced oil recovery Xi'an710075ShaanxiChina State key laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing2249China School of Mining and Petroleum Engineering University of AlbertaEdmontonTG2W2AlbertaCanad shaanxi Yanchang Petroleum(Group)Co. Ltd.Xi'an710075ShaanxiChina

Proppant transport within fractures is one of the most critical tasks in oil,gas and geothermal reservoir stimulation,as it largely determines the ultimate performance of the operating *** transport in rough fracture networks is still a relatively new area of research and the associated transport mechanisms are still *** this study,representative parameters of rough fracture surfaces formed by supercritical CO_(2) fracturing were used to generate a rough fracture network model based on a spectral synthesis *** fluid dynamics(CFD)coupled with the discrete element method(DEM)was used to study proppant transport in this rough fracture *** reveal the turning transport mechanism of proppants into branching fractures at the intersections of rough fracture networks,a comparison was made with the behavior within smooth fracture networks,and the effect of key pumping parameters on the proppant placement in a secondary fracture was *** results show that the transport behavior of proppant in rough fracture networks is very different from that of the one in the smooth fracture *** turning transport mechanisms of proppant into secondary fractures in rough fracture networks are gravity-driven sliding,high velocity fluid suspension,and fracture structure *** the same injection conditions,supercritical CO_(2)with high flow Reynolds number still has a weaker ability to transport proppant into secondary fractures than *** of the supercritical CO_(2)needs to be increased beyond a certain value to have a significant effect on proppant carrying,and under the temperature and pressure conditions of this paper,it needs to be increased more than 20 times(about 0.94 m Pa s).Increasing the injection velocity and decreasing the proppant concentration facilitates the entry of proppant into the branching fractures,which in turn results in a larger stimulated reservoir *** results help to understand the pro

关键词： Reservoir stimulation CCUS Rough fracture network Supercritical CO_(2) Proppanttransport

Interfacial Tension of CO_2 and Organic Liquid under High Pressure and Temperature

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Chinese Journal of Chemical Engineering 2014年第Z1期22卷 1302-1306页

作者：杨子浩李明远彭勃林梅钦董朝霞凌勇 enhanced oil recovery Research Institute China University of Petroleum key laboratory of enhanced oil recovery China National Petroleum Corporation (CNPC) State key laboratory of Heavy oil Processing

In order to investigate the effect of organic liquid molecular structure and the intermolecular force operating with CO2 molecules and organic liquid molecules on interfacial tension(IFT) between CO2 and organic liquid at the first contact, the interfacial tension between CO2 and hexane, octane, ethanol and cyclohexane at different temperatures and pressures is measured by using the pendant drop method and the axisymmetric drop shape analysis(ADSA). The results show that the interfacial tension between CO2 and organic liquids is affected by the polarity and the structure of the organic liquid molecule obviously. The intermolecular force operating within CO2 molecules or organic liquid, and that between CO2 and organic liquids molecules play a dominate role on the interfacial tension between CO2 and the organic liquids.

关键词： carbon dioxide Organic liquids Interfacial tension ADSA

Feasibility of Gas Drive in Fang-48 Fault Block oil Reservoir

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Petroleum Science 2007年第3期4卷 51-56页

作者： Cui Lining Hou Jirui Yin Xiangwen key laboratory of Petroleum Engineering under Ministry of Education China University of Petroleum Beijing 102249 China enhanced oil recovery Center China University of Petroleum Beijing 102249 China

The Fang-48 fault block oil reservoir is an extremely low permeability reservoir, and it is difficult to produce such a reservoir by waterflooding. laboratory analysis of reservoir oil shows that the minimum miscibility pressure for CO2 drive in Fang-48 fault block oil reservoir is 29 MPa, lower than the formation fracture pressure of 34 MPa, so the displacement mechanism is miscible drive. The threshold pressure gradient for gas injection is less than that for waterflooding, and the recovery by gas drive is higher than waterflooding. Furthermore, the threshold pressure gradient for carbon dioxide injection is smaller than that for hydrocarbon gas, and the oil recovery by carbon dioxide drive is higher than that by hydrocarbon gas displacement, so carbon dioxide drive is recommended for the development of the Fang-48 fault block oil reservoir.

关键词： Low permeability reservoir gas drive feasibility laboratory analysis numerical simulation

Characteristics of proppant transport and placement within rough hydraulic fractures

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Petroleum Exploration and Development 2024年第2期51卷 453-463页

作者： HUANG Hai ZHENG Yong WANG Yi WANG Haizhu NI Jun WANG Bin YANG Bing ZHANG Wentong School of Petroleum Engineering Xi’an Shiyou UniversityXi’an 710065China shaanxi key laboratory of carbon dioxide sequestration and enhanced oil recovery Xi’an 710075China shaanxi Provincial key laboratory of oil and Gas Well and Reservoir Seepage and Rock Mechanics Xi’an 710065China oil&Gas Field Production Construction Division PetroChina Tarim Oilfield CompanyKorla 841000China National key laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing 102249China shaanxi Yanchang Petroleum(Group)Co. Ltd.Xi’an 710075China

A three-dimensional reconstruction of rough fracture surfaces of hydraulically fractured rock outcrops is carried out by casting process,a large-scale experimental setup for visualizing rough fractures is built to perform proppant transport *** typical characteristics of proppant transport and placement in rough fractures and its intrinsic mechanisms are investigated,and the influences of fracture inclination,fracture width and fracturing fluid viscosity on proppant transport and placement in rough fractures are *** results show that the rough fractures cause variations in the shape of the flow channel and the fluid flow pattern,resulting in the bridging buildup during proppant transport to form unfilled zone,the emergence of multiple complex flow patterns such as channeling,reverse flow and bypassing of sand-carrying fluid,and the influence on the stability of the sand *** proppant has a higher placement rate in inclined rough fractures,with a maximum increase of 22.16 percentage points in the experiments compared to vertical fractures,but exhibits poor stability of the sand *** fracture width aggravates the bridging of proppant and induces higher pumping *** the viscosity of the fracturing fluid can weaken the proppant bridging phenomenon caused by the rough fractures.

关键词： reservoir fracturing rough fracture proppant transport and placement characteristics bridging buildup

SEEPAGE ABILITY OF HIGH-PRESSURE HOT COMPOSITE FOAM IN POROUS MEDIA

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Journal of Hydrodynamics 2010年第1期22卷 90-95页

作者： WANG Ke-liang LIANGShou-cheng YUAN Xin-qiang CHEN Jin-feng The key laboratory of enhanced oil and Gas recovery of the Ministry of Education Daqing Petroleum Institute Daqing 163318 China College of Civil and Environmental Engineering University of Science and Technology Beijing Beijing 100083 China The Second oil Production Company of Daqing oilfield Company Ltd. Daqing 163414 China

The technology of hot composite foam displacement refers to the injection of high-temperature flue gas and foaming and stabilizing agent into wells with a certain concentration, and after meeting the formation water, a composite foam system is formed in the reservoir. This foam displacement technology involves thermal function and so is related to nitrogen, carbon dioxide and foam flooding characteristics. After analyzing seepage flow law of hot composite foam system, seepage flow experiment of composite foam under high pressure was conducted, and seepage flow ability of hot composite foam in porous media was investigated. In the experiment, surfactant HY-3 was chosen as the foaming agent and hot flue gas was chosen as the foaming gas, and high-pressure hot foaming apparatus was employed in experiments. The experimental results indicate that the surfactant HY-3 could form stable foam in porous media, and the foam has strong ability of plugging. It is concluded that the sealing performance of foam is improved with increasing permeability and resistance coefficient and with incresing injection rate and foam strength. After foam injection, sealing characteristics of heterogeneous cores is better than that of homogeneous cores. The foam pressure has a process of transmission in porous media. In this process, with the increase of injection volume, pressure from the inlet to the outlet increases gradually, which indicates that stable foam has been formed inside the core.

关键词： composite foam surfactant HY-3 seepage flow under high pressure porous media

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

carbon emission reduction accounting method for a CCUS-EOR project

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Petroleum Exploration and Development 2023年第4期50卷 989-1000页

作者： WANG Fang LIAO Guangzhi SU Chunmei WANG Feng MA Jianguo YANG Yongzhi State key laboratory of enhanced oil and Gas recovery Beijing 100083China PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China PetroChina oil&Gas and New Energy Company Beijing 100007China carbon dioxide Development Company PetroChina Jilin Oilfield CompanySongyuan 138000China

It is difficult to quantify and certify the greenhouse gas(GHG)emission reduction in the entire process of a project of carbon capture,utilization and storage(CCUS)-enhanced oil recovery(EOR).Under the methodological framework for GHG voluntary emission reduction project,the carbon emission reduction accounting method for CCUS-EOR project was established after examining the accounting boundaries in process links,the baseline emission and project emission accounting methods,and the emission and leakage quantification and prediction models,in order to provide a certification basis for the quantification of GHG emission reduction in the CCUS-EOR *** on the data of energy consumption,emission and leakage monitoring of the CCUS-EOR industrial demonstration project in Jilin oilfield,the net emission reduction efficiency is determined to be about 91.1%at the current storage efficiency of 80%.The accounting and prediction of carbon emission reduction for CCUS-EOR projects with different concentrations and scales indicate that within the project accounting boundary,the certified net emission reduction efficiency of the low-concentration gas source CCUS-EOR projects represented by coal-fired power plants is about 37.1%,and the certified net emission reduction efficiency of the high-concentration gas source CCUS-EOR projects represented by natural gas hydrogen production is about 88.9%.The proposed method is applicable to the carbon emission reduction accounting for CCUS-EOR projects under multiple baseline scenarios during the certification period,which can provide decision-making basis for the planning and deployment of CCUS-EOR projects.

关键词： CCUS-EOR carbon emission accounting accounting boundary baseline emission

Flow characteristics and reaction properties of carbon dioxide in microtubules and porous media

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Chinese Science Bulletin 2008年第21期53卷 3409-3415页

作者： ZHAO RenBao YUE XiangAn WU YaHong XU ShaoLiang WANG Fei HOU YongLi MOE key laboratory of Petroleum Engineering China University of Petroleum Beijing 102249 China enhanced oil Recovering Research Center China University of Petroleum Beijing 102249 China

carbon dioxide reacts with porous media while flowing through them enhancing their *** flow behavior as well as the permeability enhancement effects were studied in synthetic cores,natural cores and microtubes with an inner diameter of 5 μ*** results show that the permeability of H2O-saturated cores(containing carbonate ingredients) was enhanced by increasing the injection volume of a CO2-H2O *** enhancement is attributable to carbon dioxide's corrosion,which is justified by SEM *** same phenomenon occurs with a CO2-H2O solution in microtubes,but for a different *** gas flow velocity of carbon dioxide in microtubes was approximately 100% faster than that of nitrogen because of the scale and the squeezing *** dioxide molecules dissolved in water accelerate the diffusion rate of water molecules within the boundary layer,which in turn diminishes the thickness of the water film and enlarges the effective pore *** flow behavior facilitates the injection of carbon dioxide into low-permeability reservoirs for oil-displacement and formation energy buildup *** behavior also increases the potential for carbon dioxide channeling or release from the formation.

关键词：二氧化碳超小型电子管微量作用腐蚀现象