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普光东北部须家河组储层反演技术及应用

地球科学前沿（汉斯） 2024年第6期14卷 809-822页

作者：胡凤英卞亚军张纪喜冯朝富重庆科技大学石油与天然气工程学院重庆中国石化江苏油田采油一厂江苏扬州中国石化中原油田勘探开发研究院河南濮阳

普光地区具有良好的勘探潜力,但目前缺少对于陆相有效储层的勘探。本次研究将叠后和叠前确定性反演相结合,详细阐述了研究区有效储层特征。研究结果表明,须家河组砂体在反演中显示效果较好,须六段以高纵波阻抗特征为主,须四段以低vp/vs ... 详细信息

普光地区具有良好的勘探潜力,但目前缺少对于陆相有效储层的勘探。本次研究将叠后和叠前确定性反演相结合,详细阐述了研究区有效储层特征。研究结果表明,须家河组砂体在反演中显示效果较好,须六段以高纵波阻抗特征为主,须四段以低vp/vs (纵横波速度比)特征为主,须二段砂体厚度较大,呈现出较好的反演效果。通过反演结果可知,研究区须家河组具有良好的勘探潜力,并对后期油气开发具有指导意义。

关键词：储层反演技术 vp/vs 须家河组

V_p and V_p/V_s structures in the crust and upper mantle of the Taiwan region, China

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Science China Earth Sciences 2009年第7期52卷 975-983页

作者： LI ZhiWei XU Yi HAO TianYao XU Ya Key Laboratory of Petroleum Resources Research Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China

A tomographic study of the vp and vp/vs structures in the crust and upper mantle beneath the Taiwan region of China is conducted by simultaneous inversion of P and S arrival times. Compared with the previous tomographic results, the spherical finite difference technique is suitable for the strong heterogeneous velocity structure, and may improve the accuracy in the travel time and three-dimensional ray tracing calculations. The vp and vp/vs structures derived from joint inversion and the relocated earthquakes can provide better constraints for analyzing the lateral heterogeneity and deep tectonic characters in the crust and upper mantle. Our tomographic results reveal significant relations between the seismic wavespeed structure and the tectonic characters. In the shallow depth, sedimentary basins and orogen show distinct wavespeed anomalies, with low vp, high vp/vs in basins and high vp, low vp/vs in orogen. As the suture zone of Eurasian Plate and Philippine Sea Plate, Longitudinal Valley is characterized by a significant high vp/vs anomaly extending to the middle-lower crust and upper mantle, which reflects the impact of rock cracking, partial melting, and the presence of fluids. In the northeast Taiwan, the vp, vp/vs anomalies and relocated earthquakes depict the subducting Philippine Sea Plate under the Eurasian Plate. The high vp of oceanic plate and the low vp, high vp/vs atop the subducted oceanic plate extend to 80 km depth. Along the east-west profiles, the thickness of crust reaches 60 km at the east of Central Range with eastward dipping trend, which reveals the eastward subduction of the thickened and deformed crust of the Eurasian continental plate.

关键词： Taiwan region P wave velocity vp/vs ratio lithosphere structure tomography

Crustal S-wave velocity structure across the northeastern South China Sea continental margin: implications for lithology and mantle exhumation

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Earth and Planetary Physics 2019年第4期3卷 314-329页

作者： WenAi Hou Chun-Feng Li XiaoLi Wan MingHui Zhao XueLin Qiu Institute of Marine Geology and Resources Zhejiang University Zhoushan Zhejiang 316021 China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and Technology Qingdao 266237 China State Key Laboratory of Marine Geology Tongji University Shanghai 200092 China South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China

The northeastern margin of the South China Sea (SCS), developed from continental rifting and breakup, is usually thought of as a non-volcanic margin. However, post-spreading volcanism is massive and lower crustal high-velocity anomalies are widespread, which complicate the nature of the margin here. To better understand crustal seismic velocities, lithology, and geophysical properties, we present an S-wave velocity (vs) model and a vp/vs model for the northeastern margin by using an existing P-wave velocity (vp) model as the starting model for 2-D kinematic S-wave forward ray tracing. The Mesozoic sedimentary sequence has lower vp/vs ratios than the Cenozoic sequence;in between is a main interface of P-S conversion. Two isolated high-velocity zones (HVZ) are found in the lower crust of the continental slope, showing S-wave velocities of 4.0–4.2 km/s and vp/vs ratios of 1.73–1.78. These values indicate a mafic composition, most likely of amphibolite facies. Also, a vp/vs versus vp plot indicates a magnesium-rich gabbro facies from post-spreading mantle melting at temperatures higher than normal. A third high-velocity zone (vp : 7.0–7.8 km/s;vp/vs: 1.85–1.96), 70-km wide and 4-km thick in the continent-ocean transition zone, is most likely to be a consequence of serpentinization of upwelled upper mantle. Seismic velocity structures and also gravity anomalies indicate that mantle upwelling/ serpentinization could be the most severe in the northeasternmost continent-ocean boundary of the SCS. Empirical relationships between seismic velocity and degree of serpentinization suggest that serpentinite content decreases with depth, from 43% in the lower crust to 37% into the mantle.

关键词： South China Sea continental margin crustal structure converted S-wave vp/vs ratio lithology serpentinization

东北日本地震波速度、vp／vs和各向异性结构：对俯冲带水迁移过程的探讨

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地球物理学报 2018年第3期61卷 832-844页

作者：王建肖卓伟赵大鹏姚振兴中国科学院地质与地球物理研究所中国科学院地球与行星物理重点实验室北京100029 中国科学院地球科学研究院北京100029 青岛海洋科学与技术国家实验室海洋矿产资源评价与探测技术功能实验室山东青岛266061 中国科学院大学北京100049 日本东北大学地球物理系仙台980-8578

本文利用区域地震初至波到时数据,通过地震层析成像研究获得了东北日本俯冲带上地幔(深至约150km)的P波速度(vp)、S波速度(vs)、vp/vs和P波各向异性结构.结果表明,低速及高vp/vs比异常体主要分布在火山下方的下地壳和地幔楔中,其与低频... 详细信息

本文利用区域地震初至波到时数据,通过地震层析成像研究获得了东北日本俯冲带上地幔(深至约150km)的P波速度(vp)、S波速度(vs)、vp/vs和P波各向异性结构.结果表明,低速及高vp/vs比异常体主要分布在火山下方的下地壳和地幔楔中,其与低频地震的分布吻合,该区域与俯冲板块脱水所释放的流体及其导致的部分熔融密切相关;俯冲的太平洋板块内可能由于脱水脆化导致的双层地震带区域则没有表现出整体的高vp/vs值,其可能与俯冲板块内部含水矿物含量有关;俯冲板块内双重地震带区域及上覆地幔楔薄层主要表现为与海沟平行的方位各向异性和正的径向各向异性,其可能是由于含水矿物的脱水使橄榄石晶格结构发生了从A型到B型的变化所引起的.我们研究表明,结合地震波速度和各向异性结构能够加深对俯冲带内水运移过程的认识.

关键词：地震层析成像俯冲带 vp/vs 各向异性脱水反应

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南黄海OBS数据转换横波分析及其地质意义

地球物理学报 2017年第4期60卷 1479-1490页

作者：赵维娜张训华孟祥君吴志强祁江豪郝天珧郑彦鹏中国海洋大学海洋地球科学学院青岛266100 青岛海洋科学与技术国家实验室海洋矿产资源评价与探测技术功能实验室青岛266071 青岛海洋地质研究所青岛266071 南京地质调查中心南京210016 国土资源部海洋油气资源与环境地质重点实验室青岛266071 中国科学院地质与地球物理研究所北京100029 海洋沉积与环境地质国家海洋局重点实验室国家海洋局第一海洋研究所青岛266061

多分量地震勘探在减小地球物理反演问题多解性的同时提供了更丰富的地下信息,可以从量化的意义上真正实现岩性勘探.由于地壳结构的复杂性及转换横波的特殊性,南黄海地壳结构研究中基本未涉及横波.本文使用南黄海OBS数据,在不同剖面上对... 详细信息

多分量地震勘探在减小地球物理反演问题多解性的同时提供了更丰富的地下信息,可以从量化的意义上真正实现岩性勘探.由于地壳结构的复杂性及转换横波的特殊性,南黄海地壳结构研究中基本未涉及横波.本文使用南黄海OBS数据,在不同剖面上对比分析纵横波走时、视速度以及质点运动轨迹,基于纵波理论模型对转换横波震相进行射线追踪和走时试算,识别并拟合了来自不同地层的转换横波震相.研究表明,北部坳陷中主要发生了PPS转换,转换界面为陆相沉积层底界面.千里岩隆起区除了发生转换界面为陆相沉积底界面的PPS转换还有转换界面为海底的PSS转换.断层活动引起岩石破碎,高波速比特征的断层边界为胶莱盆地在海上部分的边界圈定再添证据.千里岩地区高速地层成分含有花岗岩,其纵横波速比为1.67~1.68;推测北部坳陷中的海相沉积北-南地层不同,依次为碳酸盐岩及砂岩两类地层.

关键词：海底地震仪转换横波南黄海 vp/vs

Study of crustal structure with S-wave data from Maqen-Jingbian profile

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Acta Seismologica Sinica(English Edition) 2003年第1期16卷 92-98页

作者：刘宝峰李松林张先康张成科任青芳海燕 ResearchCenterofExplorationGeophysics ChinaSeismologicalBureau

D crustal velocity structure and vp/vs are obtained by processing and interpretation of S-wave data from Maqen-Jingbian deep seismic sounding (DSS) profile. The result shows that there exist obvious differences in 2-D S-wave velocity structure and vp/vs ratio structure along the profile. The S-wave velocities are low and vp/vs ratio is high for the western section of the profile and Haiyuan region, while they are normal for the middle and eastern sections. The changes in lithologic characters of two major anomalous zones are discussed according to lateral variation of S-wave velocity structure and vp/vs ratio structure. It is concluded that the development and occurrence of the Haiyuan strong earthquake is not only related to tectonic activities, but also to lithologic characters of the region.

关键词： deep seismic sounding velocity structure vp/vs Haiyuan earthquake

基于三重震相拟合的华南地区上地幔P波与S波速度结构

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地球物理学报 2018年第8期61卷 3237-3250页

作者：眭怡吴庆举张瑞青中国地震局地球物理研究所北京100081 中国地震局地球物理研究所地震观测与地球物理成像重点实验室北京100081

利用中国数字测震台网(CDSN)记录到的台湾地区两个地震事件6°~30°震中距范围的三重震相波形资料,基于观测与理论波形拟合法,获到华南地区上地幔P波和S波的最佳波形拟合速度模型及其V_P/V_S比值.与AK135模型相比,华南地区410km深度上... 详细信息

利用中国数字测震台网(CDSN)记录到的台湾地区两个地震事件6°~30°震中距范围的三重震相波形资料,基于观测与理论波形拟合法,获到华南地区上地幔P波和S波的最佳波形拟合速度模型及其V_P/V_S比值.与AK135模型相比,华南地区410km深度上方存在明显低速层:S波低速区厚度约为70km,速度降为2%~5%;而P波低速区厚度为70~230km,速度降为5%~6%.另外,410km间断面整体表现为一个梯度层,厚度约为10~40km,V_P跃增量为4.0%~5.4%,而V_S跃增量为2.6%~11.7%.研究区内,低速层的V_P和V_S异常值大小和410km间断面速度跃变量由北向南逐步减小.结合以往的接收函数和地震层析成像结果,华南地区410km间断面上方的低速区可能与太平洋俯冲板块脱水有关.

关键词：华南地区三重震相 vp/vs 低速层 410km间断面

五维地震预测技术在鄂尔多斯N51井区的研究及应用

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五维地震预测技术在鄂尔多斯N51井区的研究及应用

Poisson’s Ratio of Surface Soils and Shallow Sediments Determined from Seismic Compressional and Shear Wave Velocities

2022年中国石油物探学术年会

作者：裴家学蔡国钢郭彦民冉波张瑞斌郭峰中国石油辽河油田分公司勘探开发研究院

五维地震预测技术即利用五维地震的偏移距信息和方位角信息对复杂储层的岩性、物性及含油气性进行识别和描述。本文通过对叠前道集的优化处理、纵波的质量分析与校正、横波估算,得到高质量的五维地震预测的基础资料。利用叠前vp/vs预测... 详细信息

五维地震预测技术即利用五维地震的偏移距信息和方位角信息对复杂储层的岩性、物性及含油气性进行识别和描述。本文通过对叠前道集的优化处理、纵波的质量分析与校正、横波估算,得到高质量的五维地震预测的基础资料。利用叠前vp/vs预测二叠系盒8段辫状河三角洲水下分流河道含气性,叠前AVO预测二叠系太原组铝土岩含气性,叠前AVAZ各向异性反演预测奥陶系马家沟组二段裂缝发育区。针对不同类型的储层采用有针对性的含气性预测方法,预测结果与实钻井吻合良好,同时为类似区域的储层预测工作提供了一套技术方法。

关键词：五维地震道集优化横波估算纯纵波 vp/vs AVO AVAZ

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International Journal of Geosciences 2014年第12期5卷 1540-1546页

作者： U. E. Essien A. O. Akankpo M. U. Igboekwe Department of Science Technology AkwaIbom State Polytechnic Ikot Osurua Nigeria Department of Physics University of Uyo Uyo Nigeria Department of Physics Michael Okpara University of Agriculture Umudike Nigeria

This paper presents the results of seismic compressional, P- and shear, S-wave measurements carried out on the unconsolidated top-soil at the different locations of the study area to determine Poisson’s ratio. In this work, seismic refraction data is used to determine Poisson’s ratio as an aid to engineering foundation. A 12-channel seismograph with signal stacking ability was used together with high frequency (100 Hz) geophones on the top-soil. The geophone intervals were set to 5 m at the all locations. In all the locations, vp/vs ratio ranged from 1.0289 to 1.4185 for the top layer. vp/vs ratio in the second layer ranged from 1.0512 to 1.5834. The Poisson’s ratio for the first layer ranged from -8.0324 to 0.2060. For the second layer, the Poisson’s ratio ranged from -0.7567 to 0.1683. The values of vp/vs ratio less than in the first layer and in some locations in the second layer resulted in negative Poisson’s ratio. The low and negative values of Poisson’s ratio are symptomatic of occurrence of ripable anisotropic materials in the locations where they occur, which suggests that indicated average depth should be removed and refilled with geomaterials that may be resilient to carry engineering loads.

关键词： Seismic Refraction Eket vp/vs Ratio Poisson’s Ratio