数字水果湖水下地形和淤泥厚度测量   总被引：1，自引：0，他引：1  

罗长林  张正禄  梅文胜  马立广  沈强 《测绘信息与工程》2004,29(4):29-31

阐述了采用GPS接收机和双频数字测深仪 ,以伪距差分实时定位测量模式施测水果湖水下地形和淤泥厚度的全过程和若干技术问题 ,所得结果对水果湖的治理提供了可靠的资料 ,指出了武汉市湖泊治理的迫切性  相似文献   

Fluid Geoanalysis in the Chinese Continental Scientific Drilling Project   总被引：8，自引：0，他引：8  

Liqiang Luo  Xiuchun Zhan  Qing Sun 《Geostandards and Geoanalytical Research》2004,28(2):325-331

Mass spectrometry and chromatography were used in the on-line and in situ analysis of fluids in the Chinese continental scientific drilling project. The drilling processes and mud have great effects on the identification of fluids. After considering the effects of air components and artefacts on the deep fluids, we have found that in some segments, helium, methane and carbon dioxide are the main gas components that should originate from the deep Earth. The correlations among gas components are discussed and the fluid profiles in the hole are presented.  相似文献   

Overview of the MITI Nankai Trough Wells: A Milestone in the Evaluation of Methane Hydrate Resources   总被引：4，自引：0，他引：4  

Yoshihiro Tsuji    Hisashi Ishida    Masaru Nakamizu    Ryo Matsumoto  Satoshi Shimizu 《Resource Geology》2004,54(1):3-10

Abstract. Bottom-simulating reflectors suggestive of the presence of methane hydrates are widely distributed below the ocean floor around Japan. In late 1999, drilling of the MITI Nankai Trough wells was conducted to explore this potential methane hydrate resource and a Tertiary conventional structure. The wells are located in the Northwest Pacific Ocean off Central Japan at a water depth of 945 m. A total of six wells were drilled, including the main well, two pilot wells, and three post survey wells at intervals of 10–100 m. All wells except the first confirmed the occurrence of hydrates based on logging-while-drilling, wire-line logging and/or coring using a pressure and temperature coring system in addition to conventional methods. Based on the various well profiles, four methane hydrate-bearing sand-rich intervals in turbidite fan deposits were recognized. Methane hydrates fill the pore spaces in these deposits, reaching saturation of up to 80 % in some layers. The methane hydrate-bearing turbiditic sand layers are less than 1 m thick, with a total thickness of 12–14 m. The bottom depth of high hydrate concentration correlates well with the depth of the bottom-simulating reflector. Based on these exploration results, the Japanese government inaugurated a 16-year methane hydrate exploitation program in 2001.  相似文献   

随钻判断煤层气方法探讨   总被引：1，自引：0，他引：1  

方锡贤 《中国煤田地质》2004,16(5):16-20,38

结合石油录井技术，阐述了利用岩性组合特征及气测异常预测煤层位置、利用工程参数卡准煤层位置的技术方法。在此基础上探讨了运用常规技术进行地质导向方法和现场计算煤层气量方法。文中还介绍了现场钻遇煤岩的基本特征和现场判断煤层气气层厚度的方法。  相似文献   

陕北石炭二叠纪煤田吴堡矿区横沟井田勘查深孔施工技术     

曲文杰 《陕西地质》2005,23(2):108-112

本文阐述了通过采用合理的钻孔结构、钻具级配、钻进参数、泥浆配方，特别是采用不同的堵漏工艺，解决了吴堡矿区横沟井田勘查复杂地层深孔钻探施工的技术难题。  相似文献   

植物胶类冲洗液在地质灾害防治勘察工程中的应用   总被引：4，自引：0，他引：4  

牛文林陈礼仪  朱宗培 《中国地质灾害与防治学报》2005,16(B12):104-106

长期研究和生产实践表明，在地质灾害勘察工程的复杂地层进行钻探取心，特别是深厚砂卵石覆盖层取心，采用植物胶类无固相冲洗液往往会收到很好的效果。文章简要地论述了植物胶冲洗液在地质灾害防治勘察工程中具有的特殊功效。在实践及应用的基础上提出了提高取心率应控制的主要性能。即亲水性与可溶性、粘结性、降失水性、流变性及润滑性等。特别强调浆液粘弹性及表面张力的控制是提高松散破碎地层取心的重要因素。现场应用表明，KL植物胶冲洗液，护壁效果好，取芯质量好。无毒无污染，是一种能适应松散破碎地层钻进，提高取芯质量的新型钻进冲洗液体系。完全可以在地质灾害勘察工程中推广应用。  相似文献   

水下岩质边坡稳定性计算模式的探讨     

刘涛  沈明荣  陈建峰  宗军良 《水文地质工程地质》2006,33(4):5-8

论文讨论了水下岩质边坡稳定性分析中平面型滑动及其边坡后缘出现拉张裂缝等两种计算模式，着重分析了水下岩质边坡的受力机理，推导了考虑动水的水流速度及不同的滑动面倾角等水下岩质边坡稳定性评价公式，得到了岩质边坡稳定系数与水流速度的关系曲线和岩质边坡稳定系数与滑动面夹角的关系曲线。通过实例计算，讨论了水下岩质边坡后缘出现拉张裂缝后稳定性评价的主要影响因素及其变化规律。当考虑水流速度对边坡的作用时，边坡的稳定性明显下降。  相似文献   

改装G-2型钻机用于藏北砂钻施工     

谢亮 《四川地质学报》2006,26(3):182-184

目前国内不生产专用砂钻机,通过对G-2型工程钻机进行适当改造,加大柴油机的功率,加装副卷扬,去掉动力头,设计加工专用的套管夹持器和组合吊锤,实现了机械拧卸套管,大大减轻了劳动强度,提高了该型设备对藏北高原恶劣自然条件的适应能力。  相似文献   

Spatial pattern of arsenic contamination in shallow wells of Bangladesh: regional geology and nonlinear dynamics     

Faisal Hossain  Bellie Sivakumar 《Stochastic Environmental Research and Risk Assessment (SERRA)》2006,20(1-2):66-76

  相似文献   

Experimental Research of Gas Hydrate Drilling Fluids Using Polyethylene Glycol as an Inhibitor     

张凌蒋国盛  涂运中蔡记华 窦斌张家铭  宁伏龙 《中国地质大学学报(英文版)》2006,17(3):276-282

INTRODUCTION Gas hydrate is anice-like crystal compound gen-erally formed by water and natural gas molecules ,whichis mainly distributed under the oceanfloor andin the permafrost andis viewed as an energy resourcewith great potential (Jiang et al .,2002) .For the rel-ative exploration and development of gas hydrate inChina ,some specialists and scholars have suggestedthat relative test drilling exploitation should be donein the permafrost (Liu,2005 ; Li and Geng,2000) .Drillingin the per…  相似文献