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| 1 | 宽方位杨氏模量反演和裂缝预测方法及应用——以渤中凹陷H构造潜山勘探为例显示文摘裂缝可作为油气储集空间或运移通道,是潜山油气勘探的重点目标。传统的方法多基于地震属性、利用弹性分界面AVO特征预测裂缝发育方向,但是由于顶、底界面AVO特征可能存在差异,导致裂缝预测精度较低。为此,利用杨氏模量对裂缝的指示性作用,从HTI介质一阶扰动近似方程出发,拓展基于杨氏模量、泊松比和各向异性参数表征的方位弹性阻抗方程,建立方位弹性阻抗反演方法;结合方位杨氏模量椭圆拟合和各向异性参数预测裂缝发育带,避免了顶、底界面AVO特征差异对裂缝预测结果的影响;最后通过模型试算,并实际应用于渤中凹陷H构造潜山勘探中,证实了所提方法可行、合理,预测的裂缝发育强度、方向符合实际情况。 | 王建花 张金淼 吴国忱 | 2021 | 石油地球物理勘探2021，56，3： | 10 |
| 2 | HTI介质方位观测PP波反射系数一阶扰动近似显示文摘五维叠前地震数据具有丰富的炮检距与方位信息,基于五维地震数据所发展的OVT域叠前地震属性分析可以对地下储层进行有效预测。本文在方位观测系统下,基于扰动思想与介质分解理论,推导出一种新的PP波HTI介质反射系数一阶扰动近似公式,突破了传统反射系数近似公式仅适用于小炮检距的局限,进一步提高了五维地震数据中炮检距信息的利用率。计算结果表明,本文所构建的一阶扰动近似公式与传统线性近似公式相比,具有更高的精度,与精确公式的AVO特征具有更高的相似性,为利用中远炮检距信息进行五维地震反演奠定了理论基础。 | 单俊臻 吴国忱 龚诚诚 | 2019 | 石油地球物理勘探2019，54，2： | 7 |
| 3 | Elastic anisotropy and its influencing factors in organic-rich marine shale of southern China显示文摘Shale is observed to have strong anisotropy due to its unique mineralogy and microstructure, and this anisotropy property has significant impact on seismic and well-log data. The organic-rich marine shale in the southern and eastern Sichuan Basin is one of the most important shale-gas reservoir formations in China. To investigate the elastic anisotropy of this shale and its influencing factors, we performed ultrasonic velocity measurements, X-ray diffraction analysis, rock-eval pyrolysis and vitrinite reflectance measurement on the samples from the Upper Ordovician Wufeng Formation and the Lower Silurian Longmaxi Formation. The experimental results show the that:(1) the velocity anisotropy of the Wufeng-Longmaxi(WL) shale varies from 10% to 50%, and most samples have strong anisotropy;(2) the P-and S-wave anisotropy parameters(Thomsen's εand γ) increase with clay contents, but this relationship can be greatly affected by the clay orientation index;(3) organic matter content(OMC) is found to have little influence in seismic anisotropy for the over mature WL shale, whereas the OMC determines the magnitude of anisotropy of immature/mature shales(e.g. the Bakken shale or the Bazhenov shale) according to the published literatures, because organic matters in shales of different maturity have different morphologies and distributions;(4) the OMC of WL shale has positive correlation with quartz content, and this weakens the correlation between OMC and the magnitude of anisotropy to a certain extent. The results of this study provide an important rock-physics basis and data support for seismic anisotropy exploration, quantitative interpretation and resource evaluation of the organic-rich marine shales in southern China. | Zichun LIU Feng ZHANG Xiangyang LI | 2019 | Science China Earth Sciences2019，62，11： | 2 |
| 4 | Facies-constrained prestack seismic probabilistic inversion driven by rock physics显示文摘Seismic Rock physics plays a bridge role between the rock moduli and physical properties of the hydrocarbon reservoirs.Prestack seismic inversion is an important method for the quantitative characterization of elasticity,physical properties,lithology and fluid properties of subsurface reservoirs.In this paper,a high order approximation of rock physics model for clastic rocks is established and one seismic AVO reflection equation characterized by the high order approximation(Jacobian and Hessian matrix)of rock moduli is derived.Besides,the contribution of porosity,shale content and fluid saturation to AVO reflectivity is analyzed.The feasibility of the proposed AVO equation is discussed in the direct estimation of rock physical properties.On the basis of this,one probabilistic AVO inversion based on differential evolution-Markov chain Monte Carlo stochastic model is proposed on the premise that the model parameters obey Gaussian mixture probability prior model.The stochastic model has both the global optimization characteristics of the differential evolution algorithm and the uncertainty analysis ability of Markov chain Monte Carlo model.Through the cross parallel of multiple Markov chains,multiple stochastic solutions of the model parameters can be obtained simultaneously,and the posterior probability density distribution of the model parameters can be simulated effectively.The posterior mean is treated as the optimal solution of the model to be inverted.Besides,the variance and confidence interval are utilized to evaluate the uncertainties of the estimated results,so as to realize the simultaneous estimation of reservoir elasticity,physical properties,discrete lithofacies and dry rock skeleton.The validity of the proposed approach is verified by theoretical tests and one real application case in eastern China. | Kun LI Xingyao YIN Zhaoyun ZONG | 2020 | Science China Earth Sciences2020，63，6： | 1 |
| 5 | 层理泥质白云岩各向同性弹性力学试验研究显示文摘为了进一步研究层理泥质白云岩各向同性力学性能,对层理角度为0°、30°、45°、60°、90°泥质白云岩开展单轴压缩试验、EDS试验,通过试验验证其具有各向同性,在此基础上建立本构模型研究层理泥质白云岩力学性能。研究结果表明,层理泥质白云岩微观晶体结构以组合、叠聚形式存在,使其由不同晶体结构的各向异性变为定向排列的各向同性;最终基于单轴压缩试验得其各向同性的5个弹性常数,并依靠试验数据进一步研究弹性常数、层理间距、岩体密度等对岩体动力问题的影响,丰富了层理泥质白云岩在隧道围岩稳定性方面的研究。 | 谢财进 饶军应 刘灯凯 聂崇欣 | 2020 | 广西大学学报(自然科学版)2020，45，5： | 0 |
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