模拟月壤研究进展及CUG-1A模拟月壤   总被引：4，自引：1，他引：3  

贺新星  肖龙  黄俊  何琦  高睿  杨刚 《地质科技情报》2011,30(4):137-142

利用我国东北部吉林省辉南县新生代火山岩为初始原料,初步研制了模拟月壤CUG-1A.在研究CUG-1A的化学性质的同时,重点研究了其物理力学性质.数据分析表明,CUG-1A与Apollo14采样点的月壤样品有着相似的化学成分、矿物组成和物理力学性质,是一种理想的低钛型月海月壤的模拟样品.  相似文献   

碳质板岩力学性质研究   总被引：1，自引：0，他引：1  

肖尧  付小敏 《地质灾害与环境保护》2011,22(1):84-86

以广甘公路茂县段碳质板岩为研究对象,通过单轴实验和三轴实验,在不同围压和不同状态条件下,结合岩石本构关系和破坏特点,研究碳质板岩的力学性质,测量碳质板岩的强度参数,为工程实践提供参考.  相似文献   

Physical Properties, Morphology and Petrological Characteristics of Pumices from the Central Indian Ocean Basin   总被引：1，自引：0，他引：1  

Niyati G. KALANGUTKAR  Sridhar D. IYER  Dandaydayudapani ILANGOVAN 《《地质学报》英文版》2011,85(4):826-839

About 400 pumice clasts collected from the Central Indian Ocean Basin(CIOB)were studied for their morphology and were classified based on their shape and size.A majority of the samples range between<1 cm and 36 cm and in the Zinggs shape diagram plot in the equant and oblate fields.The Corey Shape Factor for most of the samples is close to 0.7,which is common for volcaniclastic material. The physical properties such as density,specific gravity,void ratio,porosity,moisture content and degree of saturation...  相似文献   

Experimental investigation of limestone of the Faiyah Range area,United Arab Emirates     

Mohamed El Tokhi 《中国地球化学学报》2011,30(1):14-18

The paper presents results of a laboratory experimental program performed on limestone rock samples, using both physical and mechanical methods. The studied rocks (Simsima Formation, Upper Cretaceous) can be classified as highly ferruginous and highly fossilliferous limestone. The lower part of the Simsima Formation contains common fauna such as Orbittoids, rhodolithic and rudists, whereas the upper part of the limestone is interbedded with conglomerates. Detailed geological, petrographic in addition to physical and mechanical tests were carried out on some representative samples from the Faiyah area, aiming at getting a better understanding of the important properties of these rocks. It is shown that the uniaxial unconfined compressive stress is the controlling factor of classification of the Faiyah limestone.  相似文献   

DH油田隔夹层测井识别研究   总被引：3，自引：0，他引：3  

陈伟  何俊富  杨斌  鲁洪江  王帅成 《物探化探计算技术》2011,33(2):202-206,109

在储层中隔夹层引起的渗流屏障和渗流差异,是影响剩余油分布的重要因素。非均质性研究是油藏三维地质建模的重要内容,因此隔夹层研究是东河砂岩非均质性不可缺少的研究内容。针对东河砂岩低阻、非均质性较强的储层特征,这里以岩芯物性为基础,测井资料为依据,将DH油田东河砂岩隔夹层分为三类。在孔隙度、渗透率精细计算基础上,建立隔夹层测井识别标准。对东河砂岩单井隔夹层进行系统识别,并做多井对比,研究隔夹层空间分布特征,取得了较好的效果。  相似文献   

Physical properties of sediment from the Mount Elbert Gas Hydrate Stratigraphic Test Well, Alaska North Slope   总被引：1，自引：0，他引：1  

William Winters  Michael WalkerRobert Hunter  Timothy CollettRay Boswell  Kelly RoseWilliam Waite  Marta TorresShirish Patil  Abhijit Dandekar 《Marine and Petroleum Geology》2011,28(2):361-380

This study characterizes cored and logged sedimentary strata from the February 2007 BP Exploration Alaska, Department of Energy, U.S. Geological Survey (BPXA-DOE-USGS) Mount Elbert Gas Hydrate Stratigraphic Test Well on the Alaska North Slope (ANS). The physical-properties program analyzed core samples recovered from the well, and in conjunction with downhole geophysical logs, produced an extensive dataset including grain size, water content, porosity, grain density, bulk density, permeability, X-ray diffraction (XRD) mineralogy, nuclear magnetic resonance (NMR), and petrography.This study documents the physical property interrelationships in the well and demonstrates their correlation with the occurrence of gas hydrate. Gas hydrate (GH) occurs in three unconsolidated, coarse silt to fine sand intervals within the Paleocene and Eocene beds of the Sagavanirktok Formation: Unit D-GH (614.4 m-627.9 m); unit C-GH1 (649.8 m-660.8 m); and unit C-GH2 (663.2 m-666.3 m). These intervals are overlain by fine to coarse silt intervals with greater clay content. A deeper interval (unit B) is similar lithologically to the gas-hydrate-bearing strata; however, it is water-saturated and contains no hydrate.In this system it appears that high sediment permeability (k) is critical to the formation of concentrated hydrate deposits. Intervals D-GH and C-GH1 have average “plug” intrinsic permeability to nitrogen values of 1700 mD and 675 mD, respectively. These values are in strong contrast with those of the overlying, gas-hydrate-free sediments, which have k values of 5.7 mD and 49 mD, respectively, and thus would have provided effective seals to trap free gas. The relation between permeability and porosity critically influences the occurrence of GH. For example, an average increase of 4% in porosity increases permeability by an order of magnitude, but the presence of a second fluid (e.g., methane from dissociating gas hydrate) in the reservoir reduces permeability by more than an order of magnitude.  相似文献   

Features of aerosol optical depth and its relation to extreme temperatures in China during 1980-2001     

HU Ting  SUN Zhaobo  LI Zhaoxin 《海洋学报(英文版)》2011,(2):33-45

Based on Total Ozone Mapping Spectrometer (TOMS) monthly aerosol optical thickness (AOT) measurements in 1980–2001 a study is made of space/time patterns and difference between land and sea of AOT 0.50 μm thick over China,which are put into correlation analysis with synchronous extreme temperature indices (warm/cold day and night).Results suggest that 1) the long-term mean AOT over China is characterized by typical geography,with pronounced land-sea contrast.And AOT has significant seasonality and its seaso...  相似文献   

Experimental study on mechanical properties of gas hydrate-bearing sediments using kaolin clay     

李洋辉  宋永臣  于锋  刘卫国  赵佳飞 《中国海洋工程》2011,25(1):113-122

A triaxial system is designed with a temperature range from-20 ℃ to 25 ℃ and a pressure range from 0 MPa to 30 MPa in order to improve the understanding of the mechanical properties of gas hydrate-bearing sediments.The mechanical properties of synthetic gas hydrate-bearing sediments (gas hydrate-kaolin clay mixture) were measured by using current experimental apparatus.The results indicate that:(1) the failure strength of gas hydrate-bearing sediments strongly depends on the temperature.The sediment’s strength increases with the decreases of temperature.(2) The maximum deviator stress increases linearly with the confining pressure at a low-pressure stage.However,it fluctuates at a high-pressure stage.(3) Maximum deviator stress increases with increasing strain rate,whereas the strain-stress curve has no tremendous change until the axial strain reaches approximately 0.5%.(4) The internal friction angles of gas hydrate-bearing sediments are not sensitive to kaolin volume ratio.The cohesion shows a high kaolin volume ratio dependency.  相似文献   

关于定量监测悬浮泥沙浓度方法的回顾和展望     

匡良  于华明  丁扬  李希彬  匡华 《海洋通报(英文版)》2011,13(2):51-61

获取近岸水体中悬浮物浓度及相关信息对于理解和管理海洋环境相当重要。历史上对于悬浮物浓度的监测往往通过费时费力的出海观测,而这种观测具有很大的局限性,每次观测只能获取一个站位的信息。为了更快更有效的获得即时悬浮物浓度相关信息,很多新的监测手段及相关科技被开发及应用。各种机载,卫星载遥感设各被用于获得及时,全面的沉积物信息...  相似文献   

海岸带区域SPOT卫星数据大气校正处理     

王小飞  毛志华  陈建裕 《海洋学研究》2011,29(1):68-72

将SPOT卫星自身近红外波段的数据作为气溶胶信息的来源,假设近红外波段暗像元受到大气影响较弱,卫星表观反射率近似等于地表反射率,且近红外波段暗像元与红光波段具备近似的线性关系,通过开源6S大气辐射传输模型的调试运行,并结合敏感性实验建立大气校正所需的查找表,最后通过一定的算法,实现了SPOT卫星Level_0级数据的大...  相似文献