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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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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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Seismic AVAZ inversion for orthorhombic shale reservoirs in the Longmaxi area, Sichuan

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Applied Geophysics 2019年第2期16卷 185-198,253页

作者： Luo Teng Feng Xuan guo zhi-qi Liu Cai and Liu Xi-Wu College of Geo-Exploration Science and Technology Jilin UniversityChangchun 130026China State Key Laboratory of Shale Oil and Gas Enrichment Mechanism and Effective Development Beijing 100083China SinoPEC Key Laboratory of Shale Oil/Gas Exploration and Production Technology Beijing 100083China SinoPEC Petroleum Exploration and Production Research Institute Beijing 100083China

Seismic AVAZ inversion method based on an orthorhombic model can be used to invert anisotropy parameters of the Longmaxi shale gas reservoir in the Sichuan Basin..As traditional seismic inversion workfl ow does not suffi ciently consider the infl uence of fracture orientation,we predict fracture orientation using the method based on the Fourier series to correct pre-stacked azimuth gathers to guarantee the accuracy of input data,and then conduct seismic AVAZ inversion based on the VTI constraints and Bayesian framework to predict anisotropy parameters of the shale gas reservoir in the study *** further analyze the rock physical relation between anisotropy parameters and fracture compliance and mineral content for quantitative interpretation of seismic inversion *** results reveal that the inverted anisotropy parameters are related to P-and S-wave respectively,and thus can be used to distinguish the effect of fracture and fl uids by the joint *** high values of anisotropy parameters correspond to high values of fracture compliance,so the anisotropy parameters can refl ect the development of fractures in *** is two sets of data from different sources,including the content of brittle mineral quartz obtained from well data and the anisotropy parameters inverted from seismic data,also show the positive *** further indicates high content of brittle mineral makes fractures developing in shale reservoir and enhances seismic anisotropy of the shale *** inversion results demonstrate the characterization of fractures and brittleness for the Longmaxi shale gas reservoir in the Sichuan Basin.

关键词： shale fracture orthorhombic AVAZ inversion

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基于改进BISQ机制的双相HTI介质波传播伪谱法模拟与特征分析

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地球物理学报 2013年第10期56卷 3461-3473页

作者：刘财兰慧田郭智奇冯晅鹿琪吉林大学地球探测科学与技术学院长春130026

改进BISQ(Biot-Squirt)机制在不引入特征喷流长度的情况下,将含流体孔隙介质中Biot流动和喷射流动两种重要的力学机制有机地结合起来,且各相关参数具有明确物理意义和可实现性.本文将改进BISQ机制一维孔隙流体压力公式推广到三维具有水... 详细信息

改进BISQ(Biot-Squirt)机制在不引入特征喷流长度的情况下,将含流体孔隙介质中Biot流动和喷射流动两种重要的力学机制有机地结合起来,且各相关参数具有明确物理意义和可实现性.本文将改进BISQ机制一维孔隙流体压力公式推广到三维具有水平对称轴横向各向同性介质(HTI介质)情况,结合裂缝各向异性理论,给出了基于改进BISQ机制的双相HTI介质模型及其二维三分量波传播方程,采用伪谱法求解该方程,进行了不同相界、不同频率以及双层地质结构情况下该类介质中波场的数值模拟与特征分析.数值模拟结果表明:伪谱法模拟精度高,压制网格频散效果好,可以得到高精度的波场快照和合成记录;基于改进BISQ机制的双相HTI介质模型兼具裂缝各向异性特征和孔隙弹性特征,其为从双相各向异性理论角度深入研究裂缝性储层的地震响应奠定了理论基础.

关键词：改进BISQ机制双相介质裂缝各向异性伪谱法波场特征

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评新自由主义市场经济理论及其实践效率——兼论我国应坚持的几个正确选择

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南京师大学报（社会科学版） 2005年第3期 26-33页

作者：郭志琦申米玲西北政法学院经济贸易系陕西西安710063

西方新自由主义市场经济理论,对发达资本主义国家来说,不是一种理想的市场经济理论,对落后国家和转型国家来说,不仅不是福音,而且是个陷阱。因此,在我国改革开放过程中,必须高度警惕和抵制国内外新自由主义的消极影响和干扰,毫不动摇地... 详细信息

西方新自由主义市场经济理论,对发达资本主义国家来说,不是一种理想的市场经济理论,对落后国家和转型国家来说,不仅不是福音,而且是个陷阱。因此,在我国改革开放过程中,必须高度警惕和抵制国内外新自由主义的消极影响和干扰,毫不动摇地坚持走社会主义市场经济的道路。

关键词：新自由主义市场经济现代市场经济社会主义市场经济

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非弹性层状介质地震波频变AVO响应模拟及分析

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地球物理学报 2016年第2期59卷 664-672页

作者：郭智奇刘财李向阳兰慧田吉林大学地球探测科学与技术学院长春130026 中国石油大学(北京)CNPC物探重点实验室北京102249 大庆油田有限责任公司勘探开发研究院黑龙江大庆163712

以非弹性层状介质为模型,基于广义传播矩阵理论计算地震波频变反射系数,算法中同时考虑了与频散和衰减有关的地层岩性因素,以及与薄互层有关的地层结构因素.实现了岩石物理模型、反射系数这两个计算过程的"无缝"连接,精确考虑了由复数... 详细信息

以非弹性层状介质为模型,基于广义传播矩阵理论计算地震波频变反射系数,算法中同时考虑了与频散和衰减有关的地层岩性因素,以及与薄互层有关的地层结构因素.实现了岩石物理模型、反射系数这两个计算过程的"无缝"连接,精确考虑了由复数弹性模量表示的地层非弹性因素,也为在同一反射模型中考虑源于不同物理机制的频散与衰减提供了方法.数值模拟结果验证了算法的有效性和稳定性,计算结果表明,非弹性薄层的反射振幅随频率先增加后减小,不一定表现常规"低频亮点"异常;同时,薄互层条件下的频散与衰减使得地震反射波的频谱以及AVO特征呈现与频率相关的复杂变化.本文完善了频变AVO算法,为含油气储层频变AVO响应的模拟和分析提供了方法.

关键词：衰减频散各向异性薄互层频变AVO

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多层倾斜层状介质P-SV转换波转换点计算的最佳角度搜索法

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地球物理学报 2011年第2期54卷 320-328页

作者：冯晅刘财郭继茹张伯军郭智奇刘洋吉林大学地球探测科学与技术学院长春130026 吉林师范大学凝聚态物理与材料科学研究所四平136000

转换波转换点的位置对转换波道集的抽取和叠加都非常重要.目前对于单一倾斜反射界面或水平层状介质模型,已经能较好地计算转换波转换点的位置.本文针对多层倾斜层状介质,提出最佳角度搜索法求取P-SV转换波转换点的位置,此方法是通过搜... 详细信息

转换波转换点的位置对转换波道集的抽取和叠加都非常重要.目前对于单一倾斜反射界面或水平层状介质模型,已经能较好地计算转换波转换点的位置.本文针对多层倾斜层状介质,提出最佳角度搜索法求取P-SV转换波转换点的位置,此方法是通过搜索最符合Snell定律的入射角和反射角来确定最佳的P-SV转换波转换点的位置.在搜索最佳转换点位置的同时,该方法也能给出最佳的P-SV波的传播路径.本文在单层和双层倾斜层状介质模型中测试了该方法,获得了精确的P-SV转换波转换点的位置和P-SV波的传播路径.

关键词：多层倾斜层状介质转换波转换点最佳角度搜索法射线路径

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