鄂尔多斯盆地上古生界高分辨率层序地层分析   总被引：35，自引：1，他引：35  

郑荣才  文华国  梁西文 《矿物岩石》2002,22(4):66-74

按基准面旋回原理，将鄂尔多斯盆地上古生界本溪组（C2b)、太原组（P1t）、山西组(P1s)和下石盒子组（P1xs)划分为3个超长期、8个长期、19个中期和62个短期旋回层序：较为详细地介绍了各级别层序的结构类型、叠加样式和沉积演化序列；建立以长期旋回层序为年代地层框架，中期旋回层序为等时地层对比单元的层序的地层格架；并讨论高分辨率层序地层与天然气藏的关系。  相似文献   

洛带气田蓬莱镇气藏开发部署优化研究     

张箭 《矿物岩石》2002,22(4):83-86

气藏评价尚未结束之前，开发的早期部署工作非常困难。针对洛带气田蓬莱镇组气藏的开发部署工作，利用目前许多新方法对开发层系划分、采气规模、开发规划、合理配产和井网部署等进行了优化研究，对气藏开发提出了指导性意见，且对类似气藏也具有参考意义。  相似文献   

Division of Gas Accumulation System and Laws Controlling Distribution of Natural Gas in Typical Petroliferous Basins of China     

JIANG Zhenxue  Pang Xiongqi  Jin Zhijun  Chen Dongxia 《中国地质大学学报(英文版)》2002,13(4)

Considering the existing problems of the petroleum system, this paper brings forward the concept of natural gas accumulation system and presents the dividing principles. Then detailed statistics on the accumulation factors of the 32 typical natural gas accumulation systems in China and studies on the laws controlling distribution of gas are collected. The research shows that the petroleum accumulation system is the basic unit controlling petroleum generation, migration and accumulation. Generating intensity, generating amount, accumulating efficiency and migration distance plays an important role in the distribution of natural gas. Through analysis on results of resources evaluation, discovered reserves and residual reserves, potential areas in middle-scaled petroliferous basins in China are forecasted in this paper. Ordos, Sichuan, Tarim and Qaidam basins are found out to be the main basins developing and enriching gas accumulation systems.  相似文献   

Numerical Calculation of Equivalent Cell Permeability Tensors for General Quadrilateral Control Volumes     

Chuanping He  Michael G. Edwards  Louis J. Durlofsky 《Computational Geosciences》2002,6(1):29-47

A new method for upscaling fine scale permeability fields to general quadrilateral-shaped coarse cells is presented. The procedure, referred to as the conforming scale up method, applies a triangle-based finite element technique, capable of accurately resolving both the coarse cell geometry and the subgrid heterogeneity, to the solution of the local fine scale problem. An appropriate averaging of this solution provides the equivalent permeability tensor for the coarse scale quadrilateral cell. The general level of accuracy of the technique is demonstrated through application to a number of flow problems. The real strength of the conforming scale up method is demonstrated when the method is applied in conjunction with a flow-based gridding technique. In this case, the approach is shown to provide results that are significantly more accurate than those obtained using standard techniques.  相似文献   

电磁波CT技术在探测堤坝工程中的应用   总被引：4，自引：0，他引：4  

欧阳立胜 《华南地震》2002,22(1):64-69

应用电磁波CT探测技术对流溪何竹料段大堤和丰顺县虎局水库大坝渗水通道进行了探测研究，由于电磁波的吸收系数和地层结构有密切关系，因此，电磁波CT是通过能量的变化观测反演吸收系数的分布，进而推测地下构造的分布，利用电磁波的吸收系数为层析物理量，在钻孔中进行透射观测，以优于0.5m的分辨率清楚地揭示了测区内渗水层位的分布情况。  相似文献   

华北地区部分井孔稀有气体异常研究   总被引：2，自引：0，他引：2       下载免费PDF全文

张培仁  刘成龙  王志敏  陶京玲  杨海祥  杨竹转  孟彩菊 《地震地质》2002,24(2):215-222

介绍了近年来华北地区宝龙等 3口井稀有气体的显著异常 ,并据其特征与井孔水位动态的关系 ,对稀有气体异常的成因进行了理论分析与实验研究。结果表明 ,水位下降 10 0mm ,岩层孔隙、裂隙中的气体体积膨胀 0 0 0 90 % (气体体积百分比 ,下同 )左右。由于地下水位大幅度下降 ,岩层孔隙压力减小 ,积聚在岩层孔隙、裂隙中的气体体积膨胀溢出 ,导致井孔地下水中稀有气体含量出现异常变化。这些异常是干扰因素所致 ,不是地震异  相似文献   

地震次生毒气泄漏与扩散的数值模拟与动态仿真   总被引：16，自引：1，他引：16  

赵振东  余世舟  钟江荣 《地震工程与工程振动》2002,22(5):137-142

文章对破坏性地震中可能发生的次生毒气泄漏与扩散灾害进行了数值模拟与动态仿真研究，设定了几种有实际意义的数值分析模型，分别进行了结构地震破坏，有毒有害气体泄漏，在一定泄漏和气象条件下的向周围空间扩散的动态仿真研究，给出了典型毒气扩散过程中可致人员死亡，严重危险和有感区域的范围的动态变化结果，作者认为地震次生毒气泄漏与扩散研究对大地震应急、城市和大型企业防灾都有重要的意义和广阔的应用前景。  相似文献   

Natural hydraulic cracking: numerical model and sensitivity study   总被引：2，自引：0，他引：2  

Xiaorong Luo 《Earth and Planetary Science Letters》2002,201(2):431-446

Natural hydrofracturing caused by overpressure plays an important role in geopressure evolution and hydrocarbon migration in petroliferous basins. Its mechanism is quite well understood in the case of artificial hydraulic fracturing triggered by high-pressure fluid injection in a well. This is not so for natural hydraulic fracturing which is assumed to initiate as micro-cracks with large influence on the permeability of the medium. The mechanism of natural hydraulic cracking, triggered by increasing pore pressure during geological periods, is studied using a fracturing model coupled to the physical processes occurring during basin evolution. In this model, the hydraulic cracking threshold is assumed to lie between the classical failure limit and the beginning of dilatancy. Fluid pressure evolution is calculated iteratively in order to allow dynamic adjustment of permeability so that the fracturing limit is always preserved. The increase of permeability is interpreted on the basis of equivalent fractures. It is found that fracturing is very efficient to keep a stress level at the rock’s hydraulic cracking limit: a fracture permeability one order of magnitude larger than the intrinsic permeability of the rock would be enough. Observations reported from actual basins and model results strongly suggest that natural hydraulic cracking occurs continuously to keep the pressure at the fracturing limit under relaxed stress conditions.  相似文献   

环渤海地区油气资源探查的思考   总被引：6，自引：6，他引：6  

刘光鼎  郝天珧  祝靓谊 《地球物理学进展》2002,17(4):559-563

回顾过去渤海勘探实践的经验，对于指导今后的研究工作是十分重要的。40年来渤海地区发现大量新老第三纪陆相石油资源，成为中国的重要产油区，也积累了丰富的勘探经验。深化环渤海地区油气资源的探查，首先应考虑前新生代海相油气资源。但其勘探是高难度的，前景是诱人的。应该认真贯彻下列认识原则：（1）区域指导局部；（2）深部制约浅层；（3）在地震处理解释创新的同时，大力发展综合地质地球物理研究。  相似文献   

松辽盆地后五家户气田沉积相特征与控气作用     

袁智广 《吉林地质》2003,22(2):34-40

本文对松辽盆地东南部后五家户气田划分出22种沉积微相,建立7种相层序,分析了扇三角洲及三角洲沉积环境对天然气成藏的控制作用。指出了扇三角洲前缘砂体和三角洲前缘砂体较为发育,沉积物源来自气田东北部和东南部两个方向。后五家户气田多为构造—岩性气藏和岩性气藏。  相似文献