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Direct hydrocarbon identification in shale oil reservoirs using fluid dispersion attribute based on an extended frequency-dependent seismic inversion scheme

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Petroleum Science 2023年第3期20卷 1532-1545页

作者： zhi-qi guo Tao Zhang Cai Liu College of Geoexploration Science and Technology jilin UniversityChangchunjilin130021China SINOPEC Key Laboratory of Geophysics NanjingJjiangsu211100China SINOPEC Geophysical Research Institute NanjingJiangsu211100China

The identification of hydrocarbons using seismic methods is critical in the prediction of shale oil ***,delineating shales of high oil saturation is challenging owing to the similarity in the elastic properties of oil-and water-bearing *** complexity of the organic matter properties associated with kerogen and hydrocarbon further complicates the characterization of shale oil reservoirs using seismic ***,the inelastic shale properties associated with oil saturation can enable the utilization of velocity dispersion for hydrocarbon identification in *** this study,a seismic inversion scheme based on the fluid dispersion attribute was proposed for the estimation of hydrocarbon *** the proposed approach,the conventional frequency-dependent inversion scheme was extended by incorporating the PP-wave reflection coefficient presented in terms of the effective fluid bulk modulus.A rock physics model for shale oil reservoirs was constructed to describe the relationship between hydrocarbon saturation and shale *** to the modeling results,the hydrocarbon sensitivity of the frequency-dependent effective fluid bulk modulus is superior to the traditional compressional wave velocity dispersion of *** analysis of the inversion re-sults based on synthetics also reveals that the proposed approach identifies the oil saturation and related hydrocarbon enrichment better than the above-mentioned conventional ***,in real data applications,actual drilling results validate the superiority of the proposed fluid dispersion attribute as a useful hydrocarbon indicator in shale oil reservoirs.

关键词： Shale oil Fluid dispersion attribute Hydrocarbon identification Frequency-dependent inversion Rock physics

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Quantitative characterization of tight gas sandstone reservoirs using seismic data via an integrated rock-physics-based framework

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Petroleum Science 2023年第6期20卷 3428-3440页

作者： zhi-qi guo Xiao-Ying qin Cai Liu College of Geoexploration Science and Technology Jilin UniversityChangchun130026JilinChina

Seismic characterizing of tight gas sandstone (TGS) reservoirs is essential for identifying promising gas-bearing regions. However, exploring the petrophysical significance of seismic-inverted elastic properties is challenging due to the complex microstructures in TGSs. Meanwhile, interbedded structures of sandstone and mudstone intensify the difficulty in accurately extracting the crucial tight sandstone properties. An integrated rock-physics-based framework is proposed to estimate the reservoir quality of TGSs from seismic data. TGSs with complex pore structures are modeled using the double-porosity model, providing a practical tool to compute rock physics templates for reservoir parameter estimation. The VP/VS ratio is utilized to predict the cumulative thickness of the TGS reservoirs within the target range via the threshold value evaluated from wireline logs for lithology discrimination. This approach also facilitates better capturing the elastic properties of the TGSs for quantitative seismic interpretation. Total porosity is estimated from P-wave impedance using the correlation obtained based on wireline log analysis. After that, the three-dimensional rock-physics templates integrated with the estimated total porosity are constructed to interpret microfracture porosity and gas saturation from velocity ratio and bulk modulus. The integrated framework can optimally estimate the parameters dominating the reservoir quality. The results of the indicator proposed based on the obtained parameters are in good agreement with the gas productions and can be utilized to predict promising TGS reservoirs. Moreover, the results suggest that considering microfracture porosity allows a more accurate prediction of high-quality reservoirs, further validating the applicability of the proposed method in the studied region.

关键词： Tight gas sandstone reservoirs Quantitative reservoir characterization Rock-physics-based framework Microfracture porosity Rock physics template

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Thermo-oxidative degradation of Nylon 1010 films:Colorimetric evaluation and its correlation with material properties

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Chinese Chemical Letters 2017年第5期28卷 949-954页

作者： Li-Hai Cai zhi-guo qi Jun Xu Bao-Hua guo Zhong-Yao Huang Key Laboratory of Advanced Materials of Ministry of Education Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Institute of Petroleum Logistical Support DepartmentCMCBeijing 102300China

The thermo-oxidative aging behaviors of Nylon 1010 films were studied by various analytical methods,such as measuring the chromaticity,relative viscosity,carbonyl index,UV absorbance at 280 nm and elongation at break of the aged *** thermo-oxidative aging plots of the results obtained via these various methods at different temperatures are subjected to the time-temperature superposition analysis,which are found to be well *** b＊ values are used as X axis and the other results,i.e.,relative viscosity,carbonyl index,UV absorbance at 280 nm and elongation at break,are used as V axis,*** relationship between the b values and the other results is obtained,from which we can derive the changes of physical and chemical properties at different b＊ *** the b＊ values can be quickly determined by using a portable spectrophotometer,the on-line evaluation of the thermo-oxidative aging of Nylon 1010 can be realized.

关键词： Nylon 1010 Colorimetric evaluation Thermo-oxidative degradation Carbonyl index UV absorbance Elongation at break Activation energy

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A rock physics model for the characterization of organic-rich shale from elastic properties

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Petroleum Science 2015年第2期12卷 264-272页

作者： Ying Li zhi-qi guo Cai Liu Xiang-Yang Li Gang Wang College of Computer Science and Technology Jilin University College of Geo-Exploration Science and Technology Jilin University British Geological Survey CNPC Key Laboratory of Geophysical Prospecting China University of Petroleum

Kerogen content and kerogen porosity play a significant role in elastic properties of organic-rich shales. We construct a rock physics model for organic-rich shales to quantify the effect of kerogen content and kerogen porosity using the Kuster and Toks6z theory and the selfconsistent approximation method. Rock physics modeling results show that with the increase of kerogen content and kerogen-related porosity, the velocity and density of shales decrease, and the effect of kerogen porosity becomes more obvious only for higher kerogen content. We also find that the Poisson＇s ratio of the shale is not sensitive to kerogen porosity for the case of gas saturation. Finally, for the seismic reflection responses of an organic-rich shale layer, forward modeling results indicate the fifth type AVO re- sponses which correspond to a negative intercept and a positive gradient. The absolute values of intercept and gradient increase with kerogen content and kerogen porosity, and present predictable variations associated with velocities and density.

关键词： Rock physics Organic-rich shale Kerogencontent - Kerogen porosity - AVO

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Scaling of ac susceptibility and the nonlinear response function of high-temperature superconductors

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Science China(Physics,Mechanics & Astronomy) 2005年第1期48卷 14-25页

作者： CHEN Kaixuan NING Zhenhua XU Hengyi qi zhi LU guo WANG Furen YIN Daole Department of Physics Peking University Beijing 100871 China Department of Physics Peking University Beijing 100871 China Department of Physics Peking University Beijing 100871 China Department of Physics Peking University Beijing 100871 China Department of Physics Peking University Beijing 100871 China Department of Physics Peking University Beijing 100871 China Department of Physics Peking University Beijing 100871 China

The amplitude-dependent ac susceptibility of high-temperature superconductors is shown to obey some empirical scaling relations. We try to analyze this behavior by extending a dc nonlinear response function of mixed state to the ac cases. The derived equations for critical current and ac susceptibility x(T) agree with the scaling relations of experimental data.

关键词： high-temperature superconductor, ac susceptibility, scaling law, nonlinear response.

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Generation of a large orbital angular momentum beam via an optical fiber winding around a curved path and its application

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Chinese Physics B 2021年第10期30卷 342-350页

作者： Wei-Han Tan Chao-Ying Zhao Yi-Chao Meng qi-zhi guo Department of Physics Shanghai UniversityShanghai 200444China College of Science Hangzhou Dianzi UniversityHangzhou 310018China State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Opto-ElectronicsShanxi UniversityTaiyuan 030006China Institute of Fiber Optics Shanghai UniversityShanghai 200444China

Many papers have been published on the study of orbital angular momentum(OAM)of the laser modes based on the Laguerre-Gaussian(LG)beam and helical phase plate or rotating cylindrical lens,and the principal ray of the LG beam remains straight *** ways are difficult to get a large OAM *** this paper,we propose a novel method to prepare a large OAM modes when the light propagates through a optical fiber winding around a curved path,and establish a theoretical framework based on the principal ray path ***,we investigate three kinds of winding ***,based on the analytical solutions and numerical calculations,we can find that the spiral body can achieve a large OAM temporal *** the same time,based on the zero OAM diffraction diagram,we can obtain an improvement of resolving power beyond Rayleigh’s ***,applying a large OAM diffraction pattern to realize 12-bitencodes,we can obtain a high-security optical information transfer system.

关键词： fiber optics orbital angular momentum(OAM) differential Fernet equation Rayleigh criterion

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Study on the multiple characteristics of M3 generation of pea mutants obtained by neutron irradiation

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Nuclear Science and Techniques 2020年第7期31卷 46-54页

作者： Da-Peng Xu Ze-En Yao Jian-Bin Pan Hu-Yuan Feng zhi-qi guo Xiao-Long Lu School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000China School of Life Sciences Lanzhou UniversityLanzhou 730000China Engineering Research Center for Neutron Application Technology Ministry of EducationLanzhou UniversityLanzhou 730000China

Irradiation breeding is an important technique in the effort to solve food shortages and improve the quality of agricultural *** this study,a field test was implemented on the M3 generation of two mutant pea plants gained from previous neutron radiation of pea *** relationship between agronomic characteristics and yields of the mutants was ***,differences in physiological and biochemical properties and seed nutrients were *** results demonstrated that the plant height,effective pods per plant,and yield per plant of mutant Leaf-M1 were 45.0%,43.2%,and 50.9%higher than those of the control group,*** analysis attributed the increase in yield per plant to the increased branching *** yield per plant of mutant Leaf-M2 was 7.8%higher than that of the control group,which could be related to the increased chlorophyll content in the *** was a significant difference between the two mutants in the increase in yield per plant owing to morphological variation between the two *** were significant differences in SOD activity and MDA content between the two mutants and the control,indicating that the physiological regulation of the two mutants also *** addition,the iron element content of seeds of the two mutants was about 10.9%lower than in the seeds of the control group,a significant *** findings indicate that the mutants Leaf-M1 and Leaf-M2 have breeding value and material value for molecular biological studies.

关键词： breeding attributed gained

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关于对白酒业诚信的思考

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酿酒科技 2006年第1期 114-116页

作者：齐治国安徽古井集团公司金融事业部东方瑞景企业投资公司上海200120

近年,随白酒行业高利润和投资小、见效快的利益驱动,及新工艺白酒技术的迅速发展,使白酒市场一边出现品牌层出不穷、琳琅满目的景象,一边又是无序竞争、假酒假广告失于诚信的混乱局面,严重影响了白酒工业的正常发展和消费者的消费。只... 详细信息

近年,随白酒行业高利润和投资小、见效快的利益驱动,及新工艺白酒技术的迅速发展,使白酒市场一边出现品牌层出不穷、琳琅满目的景象,一边又是无序竞争、假酒假广告失于诚信的混乱局面,严重影响了白酒工业的正常发展和消费者的消费。只有实施酒业立法,实施有法可依、依法治酒,诚信生产和销售,企业才能培育品牌,市场才能发展,企业才有诚信,白酒才有发展。(孙悟)

关键词：白酒诚信发展

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平面微分几何制导律应用研究

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哈尔滨工业大学学报 2007年第7期39卷 1031-1035页

作者：李超勇齐治国荆武兴哈尔滨工业大学航天工程系哈尔滨150001 上海机电工程研究院上海200233

分析了微分几何制导律在战术弹道导弹拦截场景中的捕获条件和捕获能力.首先根据古典微分几何中的曲率理论将微分几何制导曲率指令从弧长体系转换到时域下,然后给出了指令攻角的算法和微分几何制导律,最后推导出拦截高速目标时的初始必... 详细信息

分析了微分几何制导律在战术弹道导弹拦截场景中的捕获条件和捕获能力.首先根据古典微分几何中的曲率理论将微分几何制导曲率指令从弧长体系转换到时域下,然后给出了指令攻角的算法和微分几何制导律,最后推导出拦截高速目标时的初始必要捕获条件.仿真结果表明,微分几何制导律可以应用于战术弹道导弹拦截场景,且与比例导引律相比,该制导律对变机动目标具有更强的鲁棒性.

关键词：微分几何制导战术弹道导弹拦截捕获条件比例导引

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空间微分几何制导律应用研究

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宇航学报 2007年第5期28卷 1235-1240页

作者：李超勇荆武兴齐治国王辉哈尔滨工业大学航天工程系哈尔滨150001 上海机电工程研究所上海200233

分析了空间微分几何制导指令在弹道导弹拦截场景中的捕获条件和捕获能力。首先根据古典微分几何的曲率理论将微分几何制导曲率和挠率指令从弧长体系转换到时域下,然后基于理想飞行控制系统假设给出了指令攻角和指令侧滑角的算法以及空... 详细信息

分析了空间微分几何制导指令在弹道导弹拦截场景中的捕获条件和捕获能力。首先根据古典微分几何的曲率理论将微分几何制导曲率和挠率指令从弧长体系转换到时域下,然后基于理想飞行控制系统假设给出了指令攻角和指令侧滑角的算法以及空间微分几何制导律,最后推导出拦截高速目标时的初始捕获必要条件和奇异条件。仿真结果表明,空间微分几何制导律可以应用于实际的拦截场景,且与传统的比例导引律相比,该制导律对机动目标具有更好的拦截性能。

关键词：微分几何导弹制导初始条件比例导引

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