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1.
王社旗 《探矿工程》2003,30(5):49-51
从陕北石油钻井的实践出发,结合自身的特点,分析了利用煤田地质钻井设备开展石油钻井的途径。重点分析了设备、钻具组合、钻头、泥浆工艺等影响因素,提出了改进措施。  相似文献   

2.
杨伟  龙明德 《陕西地质》2013,(2):97-100
结合陕北石油钻井的实际情况,提出了三个值得注意的技术问题,对陕北的石油钻探生产有一定的借鉴作用.  相似文献   

3.
西安地质矿产研究所石油开发技术服务中心1995年在陕北石油地质市场初见成效西安地质矿产研究所石油开发技术服务中。C在所领导的大力支持下,经过樊钧副所长对陕北石油地质市场一年多的认真、细致考察,于1994年12月开始运行,1995年在陕北石油地质市场初...  相似文献   

4.
翟正峰 《探矿工程》2005,32(1):51-52
结合试验对陕北石油钻井所用钻井液进行了研究优化,优化后的PAM-GSP钻井液成功地用于钻进施工,取得一定效果。  相似文献   

5.
在地形复杂的陕北石油勘探区布设施工“一”字形排列的丛式井组,不仅占地少,而且减少了井组的辅助时间,节约了成本,是石油开发人员可首选的钻井工艺。介绍了陕北石油丛式井组的井眼轨迹设计、测量与控制、井身结构、钻具组合、钻井液的选择以及提高固井质量的经验,对提高油田开发的经济效益与社会效益具有一定的借鉴价值。  相似文献   

6.
袁波  王振福 《探矿工程》2010,37(2):79-81
从事煤层气勘探作业的机台,必须参考石油钻井行业标准《石油天然气钻井健康、安全与环境管理指南》(SY/T6283—1997)对钻探作业进行HSE管理,即通过建立HSE管理体系,对作业机台钻探生产过程中的健康、安全及环境进行动态管理。结合XY-5型岩心钻机在陕北某煤层气勘探孔生产的实际,就该钻机从事煤层气勘探作业时HSE管理办法进行介绍。  相似文献   

7.
陕北石油资源丰富,具埋藏浅,分布广特点,在一定时期内开发前景广阔。本文对年近陕北各县石油开发状况作了介绍,同时对石油开发中存在的技术问题提出措施与建议。  相似文献   

8.
海洋石油开发在世界范围内近年来发展很快。随着世界性能源危机的加剧,从事海洋石油开发的国家已越来越多。到1978年,约有八十多个国家以各种方式勘探和开发海洋石油。为适应复杂的海况条件,国内、外采用的海洋石油钻井装置一般分为固定式钻井平台、座底式钻井平台、自升式钻井平台和浮动式钻井装置(包括浮船和半潜式)四种。钻井作业时,为了使泥浆返回钻井平台以及起、下钻时使钻具能正确的导入井口,对于前三种钻井平台都需要有海水隔管,另外根据钻井工艺要求下入必要的套管,并在套管的顶部(即转盘底下)建立井口;对于浮动式钻井装置,  相似文献   

9.
《地质科技情报》2007,26(6):F0003-F0003
中原石油勘探局钻井三公司成立于1982年。钻井队由初建的8个,发展到现在的56个,钻机类型由单一的大庆32型、ZJ45型机械钻机,发展到拥有50D、70D电动钻机等多“兵种”钻机群,钻井最深打到了7170m;钻井类型由直井、斜井发展到多靶定向井和水平井;钻井领域由石油天然气钻井,扩展到地热钻井、煤层气钻井和地球科学研究钻探。  相似文献   

10.
我队在陕北石油钻井中,开始因地层渗漏较为严重,选择的泥浆粘度偏高,钻进ZK1372井1018m用了31天,施工周期长,效率低。后来在同一矿区采用低固相泥浆钻进ZK1373井,钻完1006m只用18天,钻进效率明显提高。台月效率由909m提高到1676...  相似文献   

11.
12.
Tsunamis have proven to represent a significant hazard around the globe and there is increased awareness about their occurrence. The Pacific coast in southern México is no exception, because there is firm evidence of the effects of past large tsunamis. Here we present results from computer-aided modeling of the March 28, 1787-“San Sixto” earthquake and tsunami, and focus on the regions of Acapulco, Corralero, Jamiltepec, and Tehuantepec, located along the Guerrero-Oaxaca coast. The theoretical waveforms suggest wave heights in excess of 4 m and 18 m at specific locations in Acapulco and Corralero, respectively, and wave heights of at least 2 m at locations in Jamiltepec and Tehuantepec. From our modeling results and based on historical documents and the topography of the area, we conclude that these wave heights would have been sufficient to cause inundations that in the case of Acapulco were restricted to several meters inland, but in other areas like Corralero reached at least 6 km inland. Our results are consistent with published and unpublished damage reports that attest to the hazards associated with great earthquakes and tsunamis along the subduction zone in Mexico  相似文献   

13.
14.
Statistics of the recurrence times of great earthquakes at the Pacific subduction margins are made. The mean return period of great earthquakes is different from zone to zone, ranging from 27 to 117 years. The standard deviation of the return period proves to be very small, several years say, in some cases. The probabilities of a great earthquake recurring in each zone are estimated on the basis of Weibull distribution analysis.The mean return periods thus estimated are combined with the relative plate velocities at respective zones as obtained in the plate tectonics in order to estimate the ultimate displacement to rupture at the interface of the continental plate and the downgoing oceanic plate. It is presumed that great earthquakes at subduction zones occur as a result of a rebound of the continental plate at the time of rupture. The ultimate displacement thus estimated ranges from 2 to 8 m, and seems somewhat larger than that estimated on the basis of seismic observations, although the value of ultimate displacement seems to harmonize roughly with estimates based on geodetic observations on land. However, the ultimate displacement at the Aleutian—Alaska zone as estimated here seems much smaller than that estimated from actual observations.The ultimate strains, which are deduced from the displacements obtained on the assumption that the logarithmic extent of the deformed area is proportional to earthquake magnitude, are then calculated, and compared with those estimated for large inland earthquakes as revealed by repetition of geodetic surveys. The mean ultimate strain is estimated as 4.3 · 10−5 for subduction-zone earthquakes while that for inland earthquakes has been estimated as 4.7 · 10−5. As the agreement between both the ultimate strains is fairly good, it is tentatively concluded that the strength of the plate interface under the sea bottom is more or less the same as that in the crust on land.  相似文献   

15.
Several water and surface microlayer samples from Lake St. Clair, the Niagara River, and the North Shore of Lake Ontario collected during 1983–1986 have been assayed for a variety of radionuclides. In addition, the foam accumulating in the pool just below Niagara Falls was also analyzed and found to be the most efficient aqueous phase collector of137Cs,210Pb, and226Ra.The order of radioisotope specific activities from highest to lowest is: Lake Ontario sediment, Niagara River suspended solids, Niagara River foam, surface microlayer water, and subsurface water. Radiological dose rates to the sediments from137Cs,226Ra, and228Th total about 5 mGy/y.  相似文献   

16.
The hypothesis of a widespread glaciation (Varangian) just before the Cambrian is familiar because in nearly every continent there are several deposits long interpreted as tillites and generally correlated together. The evidence on which this hypothesis is based is examined critically under three headings.
  1. 1.
    The evidence for ice action in relation to alternative explanations of tillite-like rocks. Some criteria are inconclusive but others, or combinations of criteria, are decisive.  相似文献   

17.
徐光荣 《矿床地质》1990,9(3):223-230
太平洋大金环由苏联М.И.齐克松于1979年在《太平洋区成矿分带》一书中提出,最近十年来太平洋地区进行了许多金矿地质和找矿工作。笔者认为,这一理论对普查金矿有一定的指导意义。笔者根据有关资料探讨了伊齐克松留下来的大金环的三段空白区,论证了大金环的可能连续性。笔者对伊齐克松反复强调的太平洋成矿带和大金环的不对称性问题提出修正意见,认为不对称现象往往是工作程度和研究程度不够的反映,是重要的预测目标和工作突破口。  相似文献   

18.
The weathering characteristics of the sphinx limestones are evaluated in the context of their pore system. The latter consists of ink-bottle pores. This pore system varies from one stratum to another. In the lower micritic rocks the large cavities of the ink-bottle pores are interconnected through the fine capillary network of the narrow throats. In the upper skeletal-rich rocks the interconnections are provided by large as well as small throats.The pore systems in these limestones reflect the depositional regime as well as the diagenetic alterations. The development of microspar from the micritic mud resulted in the formation of microporosity, and the extended circulation of freshwater enlarged some micropores preferentially, forming large cavities.The relationship of micro- and macropores has strongly influenced the weathering of the sphinx rocks.  相似文献   

19.
条带状铁建造(BIF)与地球大氧化事件   总被引:10,自引:0,他引:10       下载免费PDF全文
地球大氧化事件是指约24亿年前的地球大气圈中开始出现氧并连续增加。到20世纪末对地球大氧化事件的形成和演化模型可概括为两类:22亿年前为缺氧大气圈,22~19亿年大气圈中O_2明显增加,而后逐渐增加到现代大气圈O_2含量水平的C-W-K-H模型;大气圈中O_2含量自40亿年来近于常数,在现代大气圈O_2含量水平的50%范围内变化的D-K-O模型。21世纪开始实施了太古宙生物圈钻探计划(ABDP),在太古宙—元古宙页岩、条带状铁矿建造中微生物、S、C同位素分馏、稀土元素及过渡族金属Ni、Fe、Mo等含量变化等方面取得了许多新成果,建立了大气圈游离氧产生机理及含量变化的不同模型,将大气圈中氧的出现时间至少提前到25亿年前。中国前寒武纪条带状铁矿建造BIF广泛发育,特别是特有的稀土铁建造及其稀土地球化学初步研究成果表明,稀土元素的含量、轻重稀土的分异及变价元素Eu的相对富集与亏损,均显示明显的对时间的依赖。文中提出,应对其开展系统地质地球化学研究,可为大气圈、水圈的演化,特别是对研究中国铁矿的形成和分布规律研究提供重要参考资料。  相似文献   

20.
Flood is one of the common natural phenomena anywhere. In the second half of 2011, Thailand has recently faced with the most devastating flood of her modern history. More than 3,330 national highways are damaged by this flood. Some roads are heavily destroyed while others are partially damaged and emergency relieves cannot access to the flooded areas. Food and medicine distribution in the central part of the country has by large been disrupted. As a consequence, highway restoration is an urgent responsibility of road authorities. This study presents the sequential highway network restoration decision model when budgets and resources are unknown. Highways are restored one by one in sequence. To determine an optimal restoration sequence, the model is formulated as a dynamic program where the primary objective is to sequentially restore roadways to minimize the travel demand loss for the disconnected network. Once the network is connected, the secondary objective is to sequentially restore roadways to minimize the network travel time where traffic assignment onto the network is based on user equilibrium concept. The heuristic solution method using particle swarm optimization technique is provided for practical size problems. A sample network is examined to investigate the solution characteristics. It is found that the proposed algorithm can provide good practical solutions to the sequential highway network recovery problems and is incorporated to the Thailand highway maintenance management system.  相似文献   

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