Reliability-Based Load and Resistance Factors Design for Offshore Jacket Platforms in the Bohai Bay： Calibration on Design Factors     

金伟良  胡琦忠  沈照伟  时忠民 《中国海洋工程》2009,23(3):387-398

For the fulfillment of the probability-based structural design for the offshore jacket platforms in the Bohai Bay, the design factors of loads, resistance and load combinations are much necessary to be calibrated according to the proposed target reliability index. Firstly, the limit states function for the offshore jacket platforms is introduced. Then, four approaches to calibrate the factors of load and resistance are presented and compared. Afterwards, the methods to calibrate the load combination factors...  相似文献   

浙西康山可燃有机岩矿脉的实质与成因   总被引：1，自引：3，他引：1  

吴士清  冯加良 《海相油气地质》1997,2(2):52-59

对浙江西部康山可燃有机岩矿脉的镜下观察与煤，石油沥青的热模拟产物的对比，稳定碳同位素，生物标志物，微量元素的分析对比，以及大量陆源碎屑物和自生矿的的存在，确定这种可燃有机岩矿脉的实质是腐泥质盆煤－无烟煤，而非石油衍生物，不属于经过运移的石油沥青；综合区域地质条件，矿脉产状和分析数据对比，再次确认其来源为下寒武统荷塘组腐泥煤。  相似文献   

塔里木盆地库车坳陷下侏罗统砂岩储层性质的控制因素   总被引：24，自引：1，他引：24       下载免费PDF全文

寿建峰  皮学军等 《地质论评》2001,47(3):272-277

通过对4口钻井，4条地表剖面的地层沉积详细描述及相应的3000余块储层浅钻样品和近万个岩矿分析测试数据等翔实资料的分析认为，库车坳陷下侏罗统发育辫状三角洲沉积体系，三角洲平原的辫状分流河道和三角洲前缘的水下分流河道是主要的储集砂体。这套储层以吐孜洛克地区为界，东，西两区在成岩作用，储集性质和成因机制上均存在显著差异。经研究表明，砂岩粒径，地层埋藏史和构造侧向挤压是引起此差异的关键控制因素；时间域上主要表现为砂岩粒径对储集性质的影响，而空间域上储层特征的显著差异受控于地层埋藏史和构造侧向挤压。  相似文献   

Integration of Real-Time Chemical Sensors for Deep Sea Research   总被引：7，自引：0，他引：7  

陈鹰叶瑛  杨灿军 《中国海洋工程》2005,19(1):129-137

There is a great demand for in-situ real-time chemical sensors in the oceanographic research, to measure the chemical components under the deep sea. The ISE (Ion Selective Electrode) is commonly used as a detecting part of deep-sea electro-chemical sensors. The paper highlights the solidification and micromation of the working and reference electrodes. The sensors of pH and H2S with a thermal probe are accomphshed after the solution of configuration of electrodes and signal processing. The sensor system has been tested successfully in the cruise of DY105-12, 14 sponsored by China Ocean Mineral Research and Exploitation Association(COMRA).  相似文献   

Numerical Study of Oil Pollution on Sea Waters     

Geng Zhaoquan  Ni Yongqiang  Zhou Anguo Senior Engineer  Zhejiang Provincial Institute of Estuarine  Coastal Engineering Research  Hangzhou Engineer  Zhejiang Provincial Institute of Estuarine  Coastal Engineering Research  Hangzhou Engineer  Zhejiang Institute of Environmental Protection Science  Hangzhou 《中国海洋工程》1992,(1)

This paper adopted an upstream FEM of 2-D unsteady flow to calculate the tidal flow in Zhoushan sea area. Based on the verification of the tidal current and environmental situation, the effects of the oily waste discharged from the oil berths on water quality have been calculated with a similar method. The isodilutions of oil pollutant are drawn from different sewage discharges. The moving loci of the slick centrepoint of oil spill have been calculated. The spreading area of the oil spill has also been forecasted. The results indicate that the set of models can predict the transport of oil spill in the sea area with reasonable accuracy.  相似文献   

Dynamic Response of Ocean Trestle to Horizontal Impact of Moving Mass     

CHEN  Yunmin 《中国海洋工程》2002,16(1):51-60

Based on the Winkler hypothesis, a model for analysis of the flexural response of an ocean trestle embedded in layered soil to horizontal impact of a moving mass is developed. By use of the transfer matrix in time domain, one can calculate the flexural dynamic response of a single pile. Then, by use of the boundary conditions of piles at the pile top, the dynamic response of the structure is analyzed. By use of the model proposed in this paper, the interactive force between the moving mass and the structure can be computed based on Work' s kinetic energy theorem and Newton iterative method. Thus the approach does not have to assume the interactive force, while the traditional method have to. The approach more accords with the engineering practice than the traditional method and it is convenient for engineering design.  相似文献   

噻吩类化合物——判识海相原油类型和评价高演化碳酸盐岩烃源岩成熟度的理想生物标志物     

张润合  杨斌 《海相油气地质》1998,(2)

现被广泛应用的有机岩石学成熟度评价方法和有机地球化学成熟度参数在评价海相高演化碳酸盐岩烃源岩时具有很大的局限性。噻吩类化合物具有高度的热稳定性和抗微生物分解性,在碳酸盐岩中含量丰富,易于鉴定和定量计算,成熟度参数值跨度大,用其判识塔里木盆地原油的烃源岩类型、区分塔里木盆地高成熟原油的成熟度取得了良好的效果。通过进一步研究其成熟度参数与 R_0的关系,可望建立海相高演化碳酸盐岩成熟度评价标准和方法。  相似文献   

断裂系统在油气成藏中的作用     

陈溥鹤 《海相油气地质》1998,(4)

断裂系统在油气地质及成藏规律研究中具有重要意义。对于勘探和研究程度较低或很低的地区,应拓宽思路,充分利用各个地区的有利条件,开展多样的勘探和研究工作。在充分依靠先进勘探技术的同时,还应重视地面地质调查,尤其是重视已发现的地表油苗价值的开发。江西弋阳盆地和浙江金衢盆地白垩系红色砂质岩层内广泛分布裂缝性含油、含沥青显示说明,其分布明显受区域性断裂系统的控制。断裂系统与孔渗性相对较好的砂质岩配置,可形成地表油苗相对富集。  相似文献   

广西宁明亭亮下二叠统古油藏储层三史演化与成藏机理   总被引：4，自引：4，他引：0  

陈学时 《海相油气地质》1998,3(2):16-21

亭亮生物礁古油藏为一发育于早二叠世茅口期已遭破坏的大型生物礁古油藏。探讨了该礁储层的成因、三史（埋藏－构造史、有机质演化史和孔隙演化史）关系及成藏机理。礁原生孔隙普遍发育,但由于成岩期多世代方解石的胶结、充填和埋藏压实作用而破坏殆尽,其最终礁储层和有效孔隙的形成主要受控于深埋有机溶蚀作用及礁顶部存在的不整合面和古风化壳岩溶带。同时紧邻生物礁南部的生油坳陷提供的丰富油源和地下有机酸性流体多期次地运移  相似文献   

EFFECT OF THE LINEAR BETA TERM ON MOVEMENT AND DEVELOPMENT OF TROPICAL CYCLONE   总被引：2，自引：0，他引：2       下载免费PDF全文

田永祥  钮学新 《Acta Meteorologica Sinica》1998,(1)

The dynamics of tropical cyclone is investigated in a nondivergent,barotropic model with nobasic flow.The effect of linear beta term on the movement and development of tropical cyclone isemphatically demonstrated.The streamfunction tendency due to the symmetric component of linearbeta term appears in a dipole-like pattern with an east-west symmetry,which maintains andintensifies the large-scale beta gyres and causes the tropical cyclone to have a westerly movingcomponent.The streamfunction tendency due to the asymmetric component of linear beta termarises in an ellipse pattern with a north-south major axis,which weakens the tropical cyclone.Thestreamfunction tendency due to the asymmetric component of linear beta term and the intensity oflarge-scale cyclonic beta gyre synchronously vary in a fluctuating manner with time.  相似文献