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Application of multi-component joint inversion in oil and gas exploration:A case study of reservoir and gas saturation prediction of the Xujiahe formation in the PLN area of the central Sichuan Basin

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Applied Geophysics 2020年第5期17卷 879-889,905页

作者： Wang Dong He Zhen-Hua Wang Xu-Ben Li Le Yang Hai-Tao Fu Zhi-Guo Wang Hong-Yan The college of geophysics Chengdu University of TechnologyChengdu 610059China BGP Inc. China National Petroleum CorporationZhuozhou 072750China Mountain Geophysical Technology Test Center CNPC Chengdu 610213China

Multi-component seismic exploration is an important technique in the utilization of P-waves and converted S-waves for oil and gas *** has unique advantages in the structural imaging of gas zones,reservoir prediction,lithology,and gas-water identifi cation,and the development direction and degree of ***-component joint inversion is one of the most important steps in multi-component *** this paper,starting from the basic principle of multi-component joint inversion,the diff erences between the method and single P-wave inversion are ***,the technique is applied to the PLN area of the Sichuan Basin,and the P-wave impedance,S-wave impedance,and density are obtained based on multi-component joint *** the velocity and lithology,porosity,and gas saturation fi tting formulas,prediction results are calculated,and the results are ***,multi-component joint inversion and single P-wave inversion are compared in eff ective reservoir *** results show that multi-component joint inversion increases the constraints on the inversion conditions,reduces the multi-solution of a single P-wave inversion,and is more objective and reliable for the identification of reservoirs,effectively improving the accuracy of oil and gas reservoir prediction and development.

关键词： multi-component joint inversion lithology identifi cation porosity gas saturation reservoir prediction

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Interfacial nanobubbles produced by long-time preserved cold water

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Chinese Physics B 2017年第10期26卷 395-403页

作者：周利民王硕邱杰王磊王兴亚李宾张立娟胡钧 Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied Physics Chinese Academy of Sciences University of Chinese Academy of Sciences School of Physical Science and Technology Shanghai Tech University Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied Physics Chinese Academy of Sciences

Interfacial gaseous nanobubbles which have remarkable properties such as unexpectedly long lifetime and significant potential applications, are drawing more and more attention. However, the recent dispute about the contamination or gas inside the nanobubbles causes a large confusion due to the lack of simple and clean method to produce gas nanobubbles. Here we report a convenient and clean method to effectively produce interfacial nanobubbles based on a pure water system. By adding the cold water cooled at 4 ℃ for more than 48 h onto highly oriented pyrolytic graphite （HOPG） surface, we find that the average density and total volume of nanobubbles are increased to a high level and mainly dominated by the concentrations of the dissolved gases in cold water. Our findings and methods are crucial and helpful for settling the newly arisen debates on gas nanobubbles.

关键词： nanobubbles atomic force microscopy gas saturation solubility

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Importance of Modeling Heterogeneities and Correlation in Reservoir Properties in Unconventional Formations: Examples of Tight gas Reservoirs

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Journal of Earth Science 2021年第4期32卷 809-817页

作者： Shengli Li Y.Zee Ma Ernest Gomez School of Energy Resources China University of GeoscienceBeijing 100083China Information Solution SchlumbergerDenver CO 80202USA

We present lithofacies classifications for a tight gas sandstone reservoir by analyzing hierarchies of *** use principal component analysis(PCA)to overcome the two level of heterogeneities,which results in a better lithofacies classification than the traditional cutoff *** classical volumetric method is used for estimating oil/gas in-place resources in the petroleum industry since its inception is not accurate because it ignores the heterogeneities of and correlation between the petrophysical *** present the importance and methods of accounting for the heterogeneities of and correlation between petrophysical properties for more accurate hydrocarbon volumetric *** also demonstrate the impacts of modeling the heterogeneities and correlation in porosity and hydrocarbon saturation for hydrocarbon volumetric estimations with a tight sandstone gas ***,geoscientists have traditionally considered that small-scale heterogeneities only impact subsurface fluid flow,but not impact the hydrocarbon resource volumetric *** show the importance of modeling small-scale heterogeneities using fine cell size in reservoir modeling of unconventional resources for accurate resource assessment.

关键词： heterogeneity petrophysical property correlations Simpson’s paradox porosity gas saturation hydrocarbon volumetrics change of support problem

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含气饱和度对纵波首波速度、振幅及主频影响的实验结果

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地球物理学报 1988年第5期 588-593页

作者：李宁翁文波谭廷栋石油工业部石油勘探开发科学研究院研究生部石油工业部石油勘探开发科学研究院研究生部北京

虽然人们早已在声波测井中观察到天然气层的时差曲线有“周波跳跃”现象,并且,利用时差在气层增大和幅度在气层衰减的特点来勘探天然气的工作也有了报道,但含气饱和度S;和声速V,特别是和振幅A、主频F（本文中均指纵波首波）之间究竟有... 详细信息

虽然人们早已在声波测井中观察到天然气层的时差曲线有“周波跳跃”现象,并且,利用时差在气层增大和幅度在气层衰减的特点来勘探天然气的工作也有了报道,但含气饱和度S;和声速V,特别是和振幅A、主频F（本文中均指纵波首波）之间究竟有什么联系,却一直是有待解决的问题。通过对人工岩芯及井下取芯的测试,我们首次发现:1.纵波首波的振幅对气层最敏

关键词： gas saturation Head wave velocity Head wave amplitude Dominant frequency of head wave.

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