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A technical review of CO2 flooding sweep-characteristics research advance and sweep-extend technology

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petroleum Science 2025年第01期22卷 255-276页

作者： Yi-Qi Zhang Sheng-Lai Yang Lu-Fei Bi Xin-Yuan Gao Bin Shen Jiang-Tao Hu Yun Luo Yang Zhao Hao Chen Jing Li state key laboratory of petroleum Resources and engineering China University of Petroleum (Beijing) MOE key laboratory of petroleum engineering China University of Petroleum (Beijing) College of petroleum engineering China University of Petroleum (Beijing)

The utilization and storage of CO2emissions from oil production and consumption in the upstream oil industry will contribute to sustainable development. CO2flooding is the key technology for the upstream oil industry to transition to sustainable development. However, there is a significant challenge in achieving high recovery and storage efficiency in unconventional reservoirs, particularly in underdeveloped countries. Numerous studies have indicated that the limited sweep range caused by premature gas channeling of CO2is a crucial bottleneck that hinders the enhancement of recovery, storage efficiency and safety. This review provides a comprehensive summary of the research and technical advancements regarding the front sweep characteristics of CO2during migration. It particularly focuses on the characteristics, applicable stages, and research progress of different technologies used for regulating CO2flooding sweep. Finally, based on the current application status and development trends, the review offers insights into the future research direction for these technologies. It is concluded that the front migration characteristics of CO2play a crucial role in determining the macroscopic sweep range. The focus of future research lies in achieving cross-scale correlation and information coupling of CO2migration processes. Currently, the influence weight of permeability, injection speed, pressure and other parameters on the characteristics of ‘fingering-gas channeling' is still not well clear. There is an urgent need to establish prediction model and early warning mechanism that considers multi-parameters and cross-scale gas channeling degrees, in order to create effective strategies for prevention and *** are currently three technologies available for sweep regulation: flow field intervention, mobility reduction, and gas channeling plugging. To expand the sweep effectively, it is important to systematically integrate these technologies based on their regulation

关键词： Fingering-gas channeling Safe storage of CO2 Flow field intervention Mobility regulation Channeling plugging system

Numerical simulation of vortex breakdown in a cylindrical tank with rotating bottom and free surface using level set method

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Chinese Journal of Chemical engineering 2025年第1期77卷 293-300页

作者： Zepeng Zhao Qin Li Feng Ye Haoliang Wang Jianfeng Wang Hui Yu Xiangyang Li Chao Yang School of Chemical engineering Sichuan UniversityChengdu 610065China CAS key laboratory of Green process and engineering State Key Laboratory of Petroleum Molecular&Process EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Ecology and Environment Zhengzhou UniversityZhengzhou 450001China

A cylindrical chamber with a rotating bottom holds significant potential for application in cell culture bioreactors due to its ability to generate more stable swirling *** order to control vortex breakdown within the chamber,this study first establishes a computational fluid dynamics simulation coupled with the level set *** by experimental results in literature,this method accurately simulates the position and shape of vortex breakdown,and also predicts the critical Reynolds numbers for the appearance and detachment of vortex breakdown bubbles from the ***,it precisely captures the gaseliquid interface and depicts the vortex breakdown phenomenon in the air above the liquid for the first ***,it predicts the impact of physical property of gaseliquid systems on vortex breakdown in response to significant changes in viscosity of microbial process systems.

关键词： Vortex breakdown Level set Microbial cultivation Micro-bioreactor

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molecular transformation of heavy oil during slurry phase hydrocracking process:Influences of operational conditions

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petroleum Science 2025年第02期22卷 884-893页

作者： Jing-Man Lu Yuan-Feng Wang Zhi-Yuan Zhou Jian-Xun Wu Ya-He Zhang Lin-Zhou Zhang Quan Shi Sheng-Bao He Chun-Ming Xu state key laboratory of Heavy Oil processing Petroleum Molecular Engineering Center (PMEC) China University of Petroleum Petrochemical Research Institute Petro China CNPC Petrochemical Research Institute and China University of petroleum Joint laboratory of petroleum molecular Refning

The influences of reaction temperature,duration,pressure,and catalyst concentration on the molecular transformation of residual slurry phase hydrocracking process were *** molecular composition of the heteroatom compounds in the residue feedstock and its upgrading products were characterized using high-resolution Orbitrap mass spectrometry coupled with multiple ionization *** simultaneous promotion of cracking and hydrogenation reactions was observed with increasing of the reaction temperature and ***,there was a significant increase in the cracking degree of alkyl side chain,while the removal of low-condensation sulfur compounds such as sulfides and benzothiophenes was *** particular,the cracking reactions were more significantly facilitated by high temperatures,while an appropriately extended reaction time can result in the complete elimination of the aforementioned sulfur compounds with a lower degree of *** conditions of low hydrogen pressure and catalyst concentration,the products still exhibit a high relative abundance of easily convertible compounds such as sulfoxides,indicating a significant deficiency in the effectiveness of *** hydrogen pressure exhibits an optimal value,beyond which further increments have no effect on the composition and performance of the liquid product but can increase the yield of the liquid *** significantly high catalyst concentration,the effect of desulfurization and deoxidation slightly diminishes,while the aromatic saturation of highly condensed compounds was notably *** hydrogenation saturation effect cannot be attained through manipulation of other operational parameters,thereby potentially benefiting subsequent product processing and *** present study demonstrates a profound comprehension of the molecular-level residue slurry phase hydrocracking process,offering not only specific guide for process design and optimization but a

关键词： Slurry phase hydrocracking Operating condition Orbitrap MS molecular composition

Impact of temperature and salinity on fines detachment: AFM measurements and XDLVO theory

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petroleum Science 2025年第1期22卷 338-347页

作者： Wei-Feng Yuan Yu-Long Yang Lu Yuan Ji-Rui Hou state key laboratory of petroleum Resources and engineering China University of Petroleum Unconventional petroleum Research Institute China University of Petroleum

Fine particle detachment and subsequent migration can lead to severe pore plugging and consequent permeability decline. Therefore, it is crucial to quantify the critical condition when fine particle detachment occurs. The frequently observed deviations or even contradictions between experimental results and theoretical predictions of fines detachment arise from an insufficient understanding of adhesion force that can be highly influenced by salinity and temperature. To clarify the intrinsic influence of salinity and temperature on fines detachment, adhesion forces between carboxyl microspheres and hydrophilic silica substrates in an aqueous medium were measured at various salinities and temperatures using atomic force microscopy(AFM). The AFM-measured adhesion force decreases with increasing salinity or temperature. Trends of mean measured adhesion forces with temperature and salinity were compared with the DLVO and XDLVO theories. DLVO theory captured the trend with temperature via the impact of temperature on electric double layer interactions, whereas XDLVO theory captured the observed trend with salinity via the impact of salinity on the repulsive hydration force. Our results highlight the significance of hydration force in accurately predicting the fate of fines in porous media.

关键词： Adhesion force AFM Temperature Salinity XDLVO Hydration force

A phenylboronic-acid functionalized liquid photonic crystal reagent for convenient and reliable detection of glucose

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Nano Research 2025年第2期18卷 699-707页

作者： Yanxuan Zhao Huimin Zhu Jianping Ge state key laboratory of petroleum molecular&process engineering Shanghai Key Laboratory of Green Chemistry and Chemical ProcessesSchool of Chemistry and Molecular EngineeringEast China Normal UniversityShanghai 200062China Institute of Eco-Chongming Shanghai 202162China

Photonic crystal sensing is an emerging technique that directly indicates the physicochemical changes with the change of structural ***,there are still challenges in material synthesis,ease of use,and reproducibility of detection for traditional photonic crystal(PC)***,a phenylboronic-acid functionalized SiO2 liquid photonic crystal(PBA-LPC)reagent was developed for reliable detection of glucose *** is convenient to prepare/use the LPC reagent because people only need to mix the responsive substance or the analyte solution with the LPCs in synthesis/*** sensing was based on the mechanism that the mixing of PBA-LPC reagent with glucose could release H+cations from PBA,which inhibited the deprotonation of the silanol group,weakened the particle surface charge,and blue-shifted the reflection of *** PBA LPC reagents responded to the glucose in different concentration ranges depending on the dosage of PBA,which ensured both a broad range detection and an accurate detection within a specific ***,it reported reproducible results due to the precise introduction of PBA and its sufficient interaction with ***,the PBA-LPC reagent showed a selective response to glucose and good anti-interference capability against the presence of NaCl,CaSO_(4),KH_(2)PO_(4),and Vitamin *** to these properties,the PBA-LPC reagent could serve as a new material for blood sugar tests and it also demonstrated the great potential of LPCs in sensing applications.

关键词： phenylboronic-acid liquid photonic crystal detection reagent glucose sensing

A fast amplitude preserving three-parameter 3D parabolic Radon transform and its application on multiple attenuation

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petroleum Science 2025年第1期22卷 163-177页

作者： Ji-Tao Ma Kai-Ge Zhao Zhen Liao College of Geophysics China University of Petroleum (Beijing) state key laboratory of petroleum Resources and engineering China University of Petroleum (Beijing) CNPC key laboratory of Geophysical Prospecting China University of Petroleum (Beijing)

Seismic wavefields propagate through three-dimensional(3D) space, and their precise characterization is crucial for understanding subsurface structures. Traditional 2D algorithms, due to their limitations, are insufficient to fully represent three-dimensional wavefields. The classic 3D Radon transform algorithm assumes that the wavefield's propagation characteristics are consistent in all directions, which often does not hold true in complex underground media. To address this issue, we present an improved 3D threeparameter Radon algorithm that considers the wavefield variation with azimuth and provides a more accurate wavefield description. However, introducing new parameters to describe the azimuthal variation also poses computational challenges. The new Radon transform operator involves five variables and cannot be simply decomposed into small matrices for efficient computation; instead, it requires large matrix multiplication and inversion operations, significantly increasing the computational load. To overcome this challenge, we have integrated the curvature and frequency parameters, simplifying all frequency operators to the same, thereby significantly improving computation efficiency. Furthermore,existing transform algorithms neglect the lateral variation of seismic amplitudes, leading to discrepancies between the estimated multiples and those in the data. To enhance the amplitude preservation of the algorithm, we employ orthogonal polynomial fitting to capture the amplitude spatial variation in 3D seismic data. Combining these improvements, we propose a fast, amplitude-preserving, 3D threeparameter Radon transform algorithm. This algorithm not only enhances computational efficiency while maintaining the original wavefield characteristics, but also improves the representation of seismic data by increasing amplitude fidelity. We validated the algorithm in multiple attenuation using both synthetic and real seismic data. The results demonstrate that the new algor

关键词： Three-parameter 3D Radon Orthogonal polynomial Amplitude-preserving Multiple attenuation

Oilfield sustainability and management:An optimization model for the reconstruction of oil and gas gathering systems based on potential location mining

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petroleum Science 2025年第02期22卷 935-955页

作者： Jie Chen Wei Wang Wen-Yuan Sun Dong Li Yu-Bo Jiao National engineering laboratory for Pipeline Safety/MOE key laboratory of petroleum engineering China University of Petroleum (Beijing)

The carbon emissions and cost during the construction phase are significant contributors to the oilfield *** oilfields enter the late stage,the adaptability of facilities *** achieve sustainable development,oilfield reconstruction was usually conducted in discrete rather than continuous *** by economic and sustainability goals,a 3-phase heuristic model for oilfield reconstruction was developed to mine potential locations in continuous *** phase 1,considering the process characteristics of the oil and gas gathering system,potential locations were mined in continuous *** phase 2,incorporating comprehensive reconstruction measures,a reconstruction model was established in discrete *** phase 3,the topology was further adjusted in continuous ***,the model was transformed into a single-objective mixed integer linear programming model using the augmented ε-constraint *** experiments revealed that the small number of potential locations could effectively reduce the reconstruction cost,and the quality of potential locations mined in phase 1 surpassed those generated in random or grid *** studies showed that cost and carbon emissions for a new block were reduced by up to 10.45% and 7.21 %,*** reductions were because the potential locations mined in 1P reduced the number of metering stations,and 3P adjusted the locations of metering stations in continuous space to shorten the pipeline *** an old oilfield,the load and connection ratios of the old metering station increased to 89.7% and 94.9%,respectively,enhancing operation ***,recycling facilitated the diversification of reconstruction measures and yielded a profit of 582,573 ￥,constituting 5.56% of the total *** study adopted comprehensive reconstruction measures and tapped into potential reductions in cost and carbon emissions for oilfield reconstruction,offering valuable insights for future oilfield de

关键词： Oilfield reconstruction Sustainable development Optimization model Potential location 3-phase heuristic model

Real-time drilling torque prediction ahead of the bit with just-in-time learning

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petroleum Science 2025年第01期22卷 430-441页

作者： Kan-Kan Bai Mao Sheng Hong-Bao Zhang Hong-Hai Fan Shao-Wei Pan National key laboratory of petroleum Resources and engineering China University of Petroleum (Beijing) Sinopec Research Institute of petroleum engineering

The digital twin, as the decision center of the automated drilling system, incorporates physical or datadriven models to predict the system response(rate of penetration, down-hole circulating pressure,drilling torques, etc.). Real-time drilling torque prediction aids in drilling parameter optimization, drill string stabilization, and comparing the discrepancy between observed signal and theoretical trend to detect down-hole anomalies. Due to their inability to handle huge amounts of time series data, current machine learning techniques are unsuitable for the online prediction of drilling torque. Therefore, a new way, the just-in-time learning(JITL) framework and local machine learning model, are proposed to solve the problem. The steps in this method are:(1) a specific metric is designed to measure the similarity between time series drilling data and scenarios to be predicted ahead of bit;(2) parts of drilling data are selected to train a local model for a specific prediction scenario separately;(3) the local machine learning model is used to predict drilling torque ahead of bit. Both the model data test results and the field data application results certify the advantages of the method over the traditional sliding window ***, the proposed method has been proven to be effective in drilling parameter optimization and pipe sticking trend detection. Finally, we offer suggestions for the selection of local machine learning algorithms and real-time prediction with this approach based on the test results.

关键词： Drilling torque prediction Just-in-time learning Digital twin Machine learning

New alkylbenzene parameters to identify organic matter sources for source rocks of light oils and condensates from the Tarim Basin and Beibuwan Basin

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petroleum Science 2025年第01期22卷 76-89页

作者： Bing-Kun Meng Dao-Fu Song Yuan Chen Sheng-Bao Shi School of petroleum engineering and Environmental engineering Yan'an University National key laboratory of petroleum Resources and engineering College of Geosciences China University of Petroleum (Beijing)

As an important component of light hydrocarbon compounds, alkylbenzene compounds lack indicators to indicate the source of organic matter of light oils and condensates. Forty-one oil samples from the Tarim Basin and Beibuwan Basin were analyzed by comprehensive two-dimensional gas chromatography time-of-flight mass spectrometry(GC × GC-TOFMS). The concentration distributions of thirteen light hydrocarbon compounds with organic matter source and sedimentary environment indication were studied. There is no significant difference in the concentrations of 1-methylpropylbenzene(MPB) in all studied oils. However, the concentrations of 2-MPB in the Tarim swamp oils are higher than that in the Beibuwan lacustrine oils and Tarim marine oils. Based on the significant concentration difference of 1-and 2-MPB in all studied oils, 1-/2-MPB(MPBr) was proposed as an indicator to identify the source of organic matter in crude oils. The MPBr values greater than 1.5 indicate that the crude oil mainly comes from lower aquatic organisms, bacteria, and algae. The MPBr values greater than 1.0 and less than 1.5indicate that crude oil was derived from the combined contributions of lower aquatic organisms, bacteria and algae, and terrestrial higher plants. The MPBr values less than 1.0 suggest that the crude oil was mainly derived from terrigenous higher plants. The MPBr values in crude oils basically are not or slightly affected by depositional environment and secondary alteration. The MPBr values can be used to infer the organic matter origin in sediments, especially for the lack of biomarkers of light oils and condensates.

关键词： 2-Methylpropylbenzene GC×GC-TOFMS Organic matter source Light oils and condensates