大力开展直接找油找气技术研究     

陆邦干 《地球物理学进展》2002,17(2):277-280

提出了直接找渍气的必要性和可能性,回顾了以往失误的原因,推荐了百灵软件,并期望各石油公司经理层能使用该软件,化较小的代价对地震资料进一步解释利用而提高钻井成功率,并最终降低油气成本。  相似文献   

高纯氢氧化镁及其水热处理技术评述   总被引：4，自引：2，他引：4       下载免费PDF全文

许荣辉  李海民 《盐湖研究》2004,12(2):63-66

比较分析了高纯氢氧化镁制备的方法,水热改性对其组织结构的影响及产品的应用及市场前景。  相似文献   

从地理态势分析科索沃战争中的地理环境     

董春林  苏永宪  魏海平 《测绘学院学报》1999,(4)

给出了地理态势的概念, 初步探讨了地理环境的分析方法, 并从地理态势角度分析了科索沃战争的发生、发展和结局。  相似文献   

现代测绘教育改革与计算机辅助教学   总被引：6，自引：4，他引：2  

熊永良  张献洲  刘国祥 《测绘工程》1999,8(3):73-77

在阐述测绘高新技术特点和传统会教学方法局性的基础上,分析了计算机辅助教学方法的特点及在现代测绘教育改革中的作用。最后针对现代高等测绘教育提出了一些计算机辅助教学的基本思路。  相似文献   

一种制造高精度水准尺的新型工艺     

张君  郭彦珍 《测绘学院学报》1999,(2)

分析了目前我国生产水准尺的工艺现状, 指出了造成水准尺精度长期得不到提高的原因。提出了一种使用感光成像法制造高精度水准尺的制造工艺。  相似文献   

海面热带气旋域内风速分布   总被引：12，自引：0，他引：12       下载免费PDF全文

胡邦辉  谭言科  张学敏 《大气科学》1999,23(3):316-322

在原始方程中引入藤田气压模式、最大风速半径和风向内偏角等因子,经过合理的简化,推导出了适合计算海面热带气旋域内风速分布的公式。检验表明,该方法的计算结果与强、弱、西行或北上转向型的热带气旋的观测风场基本相符,对环境气压受副热带高压明显影响的热带气旋风场的计算效果尤好。  相似文献   

Late Cretaceous – Early Tertiary sedimentation and tectonic inversion in the southern Netherlands     

Gras  Rutger  Geluk  Mark 《Geologie en Mijnbouw》1999,78(1):1-19

Analysis of the Upper Cretaceous stratigraphy of the Peel Block reveals the basin development of the block to have been influenced by both the inversion of the Roer Valley Graben and Central Netherlands Basin, and the overall Late Cretaceous transgression. Sediments of Santonian to Danian age were deposited on the block. These sediments are compared with the detailed lithostratigraphy of southern Limburg, where Late Cretaceous strata are exposed. Four successions can be recognised in southern Limburg. The two oldest successions, the Santonian Oploo Formation (new name, proposed in the present contribution) and the mainly Early Campanian Vaals Formation, are restricted to the central and northern parts of the block. These siliciclastic formations were deposited under the influence of inversion of the Roer Valley Graben and the Central Netherlands Basin, as well as under the influence of a rising sea level. Towards the north, sands of the Oploo Formation grade into marls and chalks of the Ommelanden Formation. The two youngest successions comprise the largely Late Campanian to Maastrichtian Gulpen and Maastricht Formations and the Danian Houthem Formation. These chalk formations were deposited under the influence of regional subsidence during a sea-level highstand. Subsequent to deposition of the Houthem Formation, a regional regression triggered a change from shallow-marine carbonate to paralic siliciclastic deposition.  相似文献   

Tidal propagation in the Gulf of Khambhat, Bombay High, and surrounding areas     

A. S. Unnikrishnan  S. R. Shetye  G. S. Michael 《Journal of Earth System Science》1999,108(3):155-177

The continental shelf on the west coast of India is widest off Bombay and leads into a strongly converging channel, the Gulf of Khambhat. Tides in the Gulf are among the largest on the coast. We use data on amplitude and phase of major semi-diurnal and diurnal constituents at forty-two ports in the Gulf and surrounding areas to define characteristics of the tides. We then use a barotropic numerical model based on shallow water wave equations to simulate the sea level and circulation in the region. The model is forced by prescribing the tide along the open boundaries of the model domain. Observed sea level at Bombay and currents from the Bombay High region at the centre of the model domain and from a shallow station off the port of Dahanu compare favourably with the fields simulated by the model. The simulated amplitudes and phases of the four most prominent tidal constituents also compare favourably with those observed along the coast, except at a few locations where the model spatial resolution (6.37 km × 6.37 km) appears to be inadequate to resolve the local geometry. Though this encourages us to conclude that the circulation in the region is dominated by barotropic tides, a concern is that the observational database on hydrography and directly measured currents in the region is weak.  相似文献   

Static compression of the hydrous magnesium silicate phase D to 30 GPa at room temperature     

D. J. Frost  Y. Fei 《Physics and Chemistry of Minerals》1999,26(5):415-418

Phase D is a dense hydrous magnesium silicate (ideal formula MgSi₂H₂O₆) which contains silicon cations exclusively in octahedral coordination. Measurements of the unit cell parameters of phase D were made to pressures of 30 GPa using a diamond anvil cell and employing synchrotron X-ray diffraction. A neon pressure medium was used. Using a third order Birch-Murnaghan equation of state the isothermal bulk modulus of phase D was determined as 166(±3) GPa with K′ equal to 4.1(±0.3). The compression of phase D is anisotropic with the c-axis twice as compressible as the a-axis. Above 20 GPa, however, the c/a ratio becomes pressure independent. Received: 29 July 1998/ Revised, accepted: 5 August 1998  相似文献   

Equations of state of magnesium silicates anhydrous B and superhydrous B     

W. A. Crichton  N. L. Ross  T. Gasparik 《Physics and Chemistry of Minerals》1999,26(7):570-575

High-pressure single crystal X-ray diffraction experiments of phase anhydrous B and superhydrous B have been carried out to 7.3 and 7.7?GPa, respectively, at room temperature. Fitting a third-order Birch-Murnaghan equation of state to the P-V data yields values of V ₀?=?838.86?±?0.04?ų, K_T,0?=?151.5?±?0.9?GPa and K′?=?5.5?±?0.3 for Anhy-B and V ₀?=?624.71?± 0.03?ų, K_T,0?=?142.6?±?0.8?GPa and K′?=?5.8?±?0.2 for Shy-B. A similar analysis of the axial compressibilities in Anhy-B reveals that the c-axis is most compressible (K_c?=?137?±?3?GPa), the b-axis is least compressible (K_b?=?175?±?4?GPa), and the a-axis is intermediate (K_a?=?148?±?1?GPa). In Shy-B, the a-axis is most compressible (K_a?=?135?±?1?GPa), followed by the b- and c-axes which have similar compressibilities (K_b?=?146?±?3?GPa; K_c?=?148?±?3?GPa). The fact that the b-axis of Shy-B is approximately 16% more compressible than Anhy-B is primarily due to differences in the O-T layer in which the H atoms are located and the linkages with the adjacent O layers. The rigid edge-sharing chains of MgO₆ and SiO₆ octahedra in the O layer control compressibility along the a- and c-axes in both structures. The net result is a reduction in the overall anisotropic compression from ～22% in Anhy-B to ～9% in Shy-B.  相似文献