莱州湾沙三中三角洲储层地震相控反演预测     

彭刚  崔雪鹏  明君  黄捍东  唐何兵  王建兴  李久  赵海峰  王宏宁 《高校地质学报》2021,27(5):554-560

垦利10-1油田位于莱北低凸起北部斜坡带,储层评价重点的沙河街组整体为复杂断块油藏,主力含油层段沙三中Ⅰ油组以辫状河三角洲沉积为主,Ⅱ油组发育高频进积型三角洲,砂体横向变化大,储层厚度薄,采用常规手段无法准确刻画进积体内部砂体边界,预测精度不高。文章利用地震相控反演技术,将沉积相特征在地震剖面上进行转化,再由储层变量先验信息随机模拟空间储层参数体,建立完整的地质统计变差函数,并创新性的引入噪声模型自适应正则化参数,实现了反演解的稳定性和分辨率都得到了提升。垦利10-1油田的实际应用表明,反演结果与盲井资料吻合较好,能够准确清晰刻画单一进积体砂泥岩的边界,符合三角洲沉积规律,实现了精准预测中深层油气藏的目的,对于今后进一步深层油气勘探开发工作具有重大的指导意义。  相似文献   

Dynamic Impact of the Vertical Shear of Gradient Wind on the Tropical Cyclone Boundary Layer Wind Field          下载免费PDF全文

CAI Ninghao  XU Xin  SONG Lili  BAI Lin  MING Jie  WANG Yuan 《Acta Meteorologica Sinica》2014,28(1):127-138

This work studies the impact of the vertical shear of gradient wind （VSGW） in the free atmosphere on the tropical cyclone boundary layer （TCBL）. A new TCBL model is established, which relies on five- force balance including the pressure gradient force, Coriolis force, centrifugal force, turbulent friction, and inertial deviation force. This model is then employed to idealize tropical cyclones （TCs） produced by DeMaria＇s model, under different VSGW conditions （non-VSGW, positive VSGW, negative VSGW, and VSGW increase/decrease along the radial direction）. The results show that the free-atmosphere VSGW is particularly important to the intensity of TC. For negative VSGW, the total horizontal velocity in the TCBL is somewhat suppressed. However, with the maximum radial inflow displaced upward and outward, the radial velocity notably intensifies. Consequently, the convergence is enhanced throughout the TCBL, giving rise to a stronger vertical pumping at the TCBL top. In contrast, for positive VSGW, the radial inflow is significantly suppressed, even with divergent outflow in the middle-upper TCBL. For varying VSGW along the radial direction, the results indicate that the sign and value of VSGW is more important than its radial distribution, and the negative VSGW induces stronger convergence and Ekman pumping in the TCBL. which favors the formation and intensification of TC.  相似文献   

An Overview of the Studies on Black Carbon and Mineral Dust Deposition in Snow and Ice Cores in East Asia          下载免费PDF全文

WANG Xin  XU Baiqing  MING Jing 《Acta Meteorologica Sinica》2014,28(3):354-370

Black carbon （BC） is the most eff ective insoluble light-absorbing particulate （ILAP）, which can strongly absorb solar radiation at visible wavelengths. Once BC is deposited in snow via dry or wet process, even a small amount of BC could signifi cantly decrease snow albedo, enhance absorption of solar radiation, accelerate snow melting, and cause climate feedback. BC is considered the second most important component next to CO2 in terms of global warming. Similarly, mineral dust （MD） is another type of ILAP. So far, little attention has been paid to quantitative measurements of BC and MD deposition on snow surface in the midlatitudes of East Asia, especially over northern China. In this paper, we focus on reviewing several experiments performed for collecting and measuring scavenging BC and MD in the high Asian glaciers over the mountain range （such as the Himalayas） and in seasonal snow over northern China. Results from the surveyed literature indicate that the absorption of ILAP in seasonal snow is dominated by MD in the Qilian Mountains and by local soil dust in the Inner Mongolian region close to dust sources. The detection of BC in snow and ice cores using modern techniques has a large bias and uncertainty when the snow sample is mixed with MD. Evidence also indicates that the reduction of snow albedo by BC and MD perturbations can signifi cantly increase the net surface solar radiation, cause surface air temperature to rise, reduce snow accumulation, and accelerate snow melting.  相似文献   

风廓线雷达对天山中部一次层状云降水过程的探测分析   总被引：1，自引：1，他引：0  

明虎  王敏仲  阮征  高联辉  魏刚 《气象》2014,40(12):1513-1521

应用边界层风廓线雷达对天山中部巴音布鲁克201 2年8月8日22:00到8月9日04:00的层状云降水过程进行探测试验研究。利用垂直速度功率谱数据计算得到谱参数,根据谱参数的变化特点确定了0℃层高度为1100~1900 m。并对0℃层以下600~1100 m进行了雨滴谱的反演,反演结果说明了中粒子和大粒子浓度的多少是引起回波强度大小的主要因素。由雨滴谱计算得到了此次降水过程的降水强度和液态水含量的时空演变图,在变化趋势上和回波强度是一致的,建立回波强度和降水强度的关系为:Z=76.5 I~(1.6)。  相似文献   

植被地表反照率动态模拟方法比较-以玉米农田为例     

蔡福  明惠青  赵先丽  米娜  梁涛  刘明  宋国云  陈雨  张玉书 《气象与环境学报》2014,30(5):78-82

利用2007年锦州玉米农田生态系统野外观测站玉米生长季辐射资料,对地表反照率综合模型、半经验双层模型和简化双层模型模拟精度进行比较。结果表明：简化双层模型在玉米生育初期模拟能力较差,其他时段模拟能力都较强,尤其在玉米生育后期更为明显;半经验双层模型除在玉米叶面积指数处于最大时期模拟误差较小外,其他时段基本无法模拟。综合模型大部分时段模拟能力都较强,仅在玉米生育后期模拟能力稍差,该模型对实现玉米农田地表反照率动态参数化更为理想,可为改进陆面过程模型提供参考。  相似文献   

最新国际地磁参考场模型IGRF11研究   总被引：5，自引：1，他引：4       下载免费PDF全文

刘元元  王仕成  张金生  郑玉航  乔玉坤 《地震学报》2013,35(1):125-134

详细阐述了国际地磁参考场模型IGRF11的建模原理、 数据来源、 球谐系数及误差来源等. 以NOAA/NGDC候选地磁场模型为例, 分析了数据的选取原则和校正方法. 在MATLAB环境下, 研制了该模型的可视化软件, 为制备地磁仿真基准图提供了最有可能和最为便捷的途径, 能有效使用国际公开数据, 减少外场地磁实测工作量和成本, 对地磁导航工程化具有重要的价值. 对模型检验值和实测值与模型计算值进行比较, 结果表明, 软件计算结果是正确的、 可靠的; 对IGRF11与WMM2010模型的异同点进行比较, 结果表明, WMM2010的模型精度要高于IGRF11, 具有更为广阔的适用范围. 最后, 从模型长期变化估算角度入手, 分析了引起IGRF11模型计算精度低的原因.   相似文献   

ANALYSIS OF 129I USING ACCELERATOR MASS SPECTROMETRY AND ITS APPLICATION TO ENVIRONMENTAL AND GEOLOGICAL STUDIES     

Zhou Weijian  Fan Yukun  Hou Xiaolin  Chen Ning  Zhang Luyuan  Liu Qi  Fu Yunchong  He Chaohui  Luo Maoyi 《第四纪研究》2012,32(3)

文章简要介绍了我们研究组近3年在129I加速器质谱应用和分析方法方面的部分研究结果.测定了核前黄土样品中129I水平,为地质定年的探索奠定了一定的基础;通过抽样分析检测了我国某核电站核环境安全的状况,结果表明当前它与大气沉降的本底水平一致,环境是安全可靠的;建立了水样、土壤、植物等不同类型样品中碘的分离、制备以及129I加速器质谱测试方法,尤其对无载体微量碘分离、制备和其中129I测量进行了探索,解决了超痕量碘样品的制备难题;此外,对实验用的试剂以及食用碘盐等进行了检验,示踪了不同来源的碘,为数据的可靠和问题的分析提供了保障.结果显示,129I既是一个地质、环境示踪的有效工具,又具有定年的潜力和广阔的应用前景.  相似文献   

一种新型绳索钻具打捞器     

明文威  苑春雷  雷明善 《吉林地质》2014,(4)

绳索钻具打捞器在地质勘探取心过程中有着相当重要的作用,不论是取心还是深孔投放钻具都要用到打捞器,这就要求打捞器在投放过程中有极高的可靠性,保证脱卡器能够顺利脱卡。同时打捞器在被提出钻外后要求有很高的安全性,保证不会空中脱钩伤人。本文所述的一种新型绳索打捞器具有较高的可靠性和安全性,并且兼具重锤的功能,无需打钻过程中投放重锤,可以大大提高钻探效率。  相似文献   

The levels of fluorine in the sediments of the aquifer and their significance for fluorosis in coastal region of Laizhou Bay,China     

Qiao Chen  Qingshui Lu  Zhaojun Song  Peng Chen  Yukun Cui  Rui Zhang  Xiaohui Li  Jingyuan Liu 《Environmental Earth Sciences》2014,71(10):4513-4522

The levels of fluorine in sediment cores obtained from Changyi County (PZ core) and Laizhou County (TS core) are used to discuss the fluorine sources in groundwater and its enrichment dynamics. The sediments in the aquifer are mainly constituted of granite gravels. The levels of fluorine in the PZ and TS cores range from 130 to 468 mg/kg, 139–528 mg/kg, with average values of 324, 348 mg/kg, respectively, which show relatively lower levels than the national average of fluorine in the soil or sediment. Thus, the fluorosis in this area should not be attributed to the levels of fluorine in sediments. The average fluorine concentrations in the aquifer from top to bottom are 154, 139, 200, 222 mg/kg for the TS core, and 154, 130, 266, 272 mg/kg for the PZ core, respectively, which are the lowest of the cores and extremely lower levels than the fresh granites. Such a fact indicates that a vast amount of fluorine has been leached into the groundwater. Moreover, the fluorine leachability is estimated to be approximately 70 %, although the previous documents showed fluorine contents of the granite surrounding Laizhou Bay were almost equal to or even lower than the average levels of fluorine in fresh granites. Meanwhile, a simulation experiment also reveals that fluorine release from rocks increases with the addition of seawater and brine water. Therefore, the seawater intrusion may potentially enhance the fluorine leachability, and should be an important dynamic of fluorine enrichment.  相似文献   

福建省现代地壳垂直运动与断裂活动     

刘与锟  郭逢英  陈兆煌  黄立人  马青 《大地测量与地球动力学》1998,(4)

根据福建省境内１９７２年以来两次精密水准复测资料,利用速率面拟合法研究福建省现今地壳垂直运动的特征,并结合本区地质构造和地震活动性探讨这种运动的地球物理意义。资料分析表明,本区内新华夏系构造带是强震活动的主要场所,强震活动地点则又受到与这些新华夏系构造交汇的次一级的东西向构造、北西向构造和环状构造活动的制约;在主要构造断块的交接带上则表现为较显著的地壳垂直运动的差异性,差异活动较强烈的地区与本区地震活动的分布特征有着良好的一致性,且地震均落在地壳垂直运动速率变化较大的地区或其邻近海域  相似文献