单侯井田构造发育规律及其对煤层开采的影响     

吴顺福 《中国煤炭地质》2008,20(2):1-5

从区域构造入手,对单侯井田构造进行分析,认为井田内断层发育以走向NW—NE、落差≤5m的小型正断层为主,且主要分布于大中型构造的两侧．特别是在其弧形转折带附近往往形成“羽”状雁列的小断层密集带。断层垂向上多分布于4—7号煤层之间的厚煤层发育区,其严重破坏了煤层的连续及完整性,是影响煤层开采的最主要因素之一。井田褶皱构造相对不发育,以短轴小型背、向斜为主,均属缓波状褶曲,对煤层的开采无影响或影响较小。根据井田地质构造发育程度,对其进行预测及分区评价：井田东部为强烈的构造挤压带,以发育走向NW-近EW—NE向的大型逆掩断层为特点,构造最复杂;井田西北部是相对较轻微的构造挤压带,以发育走向NE向的逆断层为特征,构造较复杂;井田南部以发育近SN或NNW向正断层为主,构造相对简单。评价结果对矿井设计及采区与工作面布置有一定的指导作用。  相似文献   

煤层气储层测井评价有关问题的讨论     

凌毅平  程夏胜 《中国煤炭地质》2008,(12):36-37

煤层气的形成和储层的特性决定了煤层气储层评价的一系列关键参数,这些参数可用常规测井方法直接或间接获得。目前常规测井方法包括自然电位、双侧向（或感应）、微电极、补偿密度、自然伽马、声波时差、声波全波列、中子孔隙率以及井径测井等。选用不同测井方法采用线性回归或体积模型等方法,可以获得煤层气储层评价参数。  相似文献   

青藏高原羌D2井海相烃源岩评价和油源对比   总被引：1，自引：0，他引：1  

刘伟  曾花森 《海相油气地质》2008,13(1):33-36

南羌塘坳陷D2井中侏罗统曲布组海相碳酸盐岩大部分为差—好烃源岩级别,少部分为非烃源岩级别,有机质母质类型以Ⅱ型为主,热演化处于成熟—高成熟阶段。油源对比分析表明,羌D2井曲布组白云岩和含沥青角砾岩中油质沥青来自该组地层灰岩烃源岩,具自生自储性质。同时,中侏罗统雀莫错组灰黑色泥页岩作为烃源层也存在提供油源的可能性。  相似文献   

中国南方含油气区构造—沉积类型及其勘探潜力   总被引：1，自引：0，他引：1  

赵喆  钟宁宁  梁狄刚  陈建平 《海相油气地质》2008,13(1):51-54

南方含油气的复杂构造区根据构造—沉积类型的不同,可将其分为四种类型。通过对不同类型典型含油气区的生烃量及非构造运动天然气散失量的化学动力学计算,认为这四种类型含油气区的油气聚集潜力从好到坏依次为:喜马拉雅运动抬升暴露型、燕山运动抬升暴露型、反复抬升—沉降型和海西—印支运动抬升暴露—后期浅埋型。主要构造运动发生越晚,对油气保存越有利。  相似文献   

封闭体系有机质与有机碳氢氮恢复动力学研究   总被引：3，自引：0，他引：3  

彭平安  秦艳  张辉  刘大永  张善文  隋风贵  李钜源  李政 《海相油气地质》2008,13(2):27-36

在封闭体系的条件下,对典型的Ⅰ、Ⅱ、Ⅲ型干酪根在热演化过程中的损失进行生烃动力学研究,获得了Ⅰ、Ⅱ、Ⅲ型干酪根的总量、有机碳、氢以及氮质量损失动力学参数。用Kinetics软件计算了封闭体系干酪根有机碳丰度、氢碳原子比和氮碳原子比的恢复系数。认为在对高成熟—过成熟干酪根进行生烃评价时,Ⅰ、Ⅲ型干酪根残余有机碳丰度需要进行恢复,而Ⅱ型干酪根残余有机碳丰度不需要恢复。三种类型干酪根的氢碳原子比均需要进行恢复。  相似文献   

雁南煤矿北二采区充水因素及开采影响评价     

于世全  任德平 《中国煤炭地质》2008,20(3):51-52

在全面分析大雁矿业集团公司雁南煤矿北二采区的水文地质条件及煤层开采矿井充水因素的基础上,计算了开采27^1号煤层时导水裂隙带发育高度．得出了北二采区各煤层工作面开采即不会受到上部砂砾含水层的影响,雁南煤矿铁路涵洞以西的胜利河冲击沟也不会受到北二采区的采动塌陷影响的结论。  相似文献   

浅谈太湖流域饮用水安全与地下水保护     

肖裕生  钟华平  谢石连 《上海国土资源》2008,(1):18-20,43

太湖流域经济发达,人口稠密,如管理不善将引发水污染严重、水环境恶化和水质型缺水等水问题,对饮用水安全构成威胁。因此,地下水在保障太湖流域饮用水安全中的作用就显得特别重要,提出了太湖流域地下水保护的对策措施。  相似文献   

Towards a nonperturbation transport theory in hetereogeneous aquifers     

Sergio E. Serrano 《Mathematical Geology》1996,28(6):701-721

A large body of existing theories of flow and contaminant transport in aquifers ignore the presence of recharge, eliminate the boundary conditions, neglect transient conditions in groundwater flow, conceive hydraulic gradients as linear, and require parameter variability to be stationary and Gaussian. The most outstanding and difficult to justify assumption is the subjective small size of the stochastic terms (i.e., small perturbation methods), which usually is forced by considering the logarithm of the hydraulic conductivity. Several problems in flow and contaminant subsurface hydrology, such as the enhanced dispersion parameters with plume size or time after injection, remain to be observed in the light of a stochastic theory that allows a more realistic consideration of physical and hydrologic properties. In this article, an attempt is made to reformulate a contaminant transport equation (the variable dispersion equation, VDE) with transport parameters in terms of regional hydrologic and aquifer hydraulic properties, such as recharge rate, spatially random transmissivity, hydraulic gradient, aquifer thickness, and soil porosity. Subsequently, a general analytic procedure, the method of decomposition, is used to derive a solution to the VDE. This procedure does not require small perturbation, logarithmic transformations, or specific probability law assumptions. Comparison tests with existing theoretical and field results are given. The tests illustrate the enhanced dispersion and shifting concentration effects produced by the variable dispersion equation. Finally a generalization of the method to nonstationary dispersion in three-dimensional domains is proposed.  相似文献   

Environmental records of carbonaceous fly-ash particles from fossil-fuel combustion   总被引：3，自引：0，他引：3  

Maria Wik  Ingemar Renberg 《Journal of Paleolimnology》1996,15(3):193-206

Analysis of fly-ash particles in lake sediments has become increasingly important in studies of environmental pollution and lake acidification history. Most fly-ash studies have concerned black spheroidal carbonaceous particles (SCP)(>5 m) produced from oil and coal combustion. This review paper provides a summary of this technique and its application, and focusses on our investigations in Sweden between 1979 and 1993. It consists of five parts: i) preparation and analysis methods, ii) historical trends in atmospheric deposition, iii) geographical surveys of atmospheric deposition, iv) sediment dating, and v) studies of sedimentation processes in lakes. Methods for preparation and analyses of SCP have been developed and applied to investigations using sediment, soil and snow samples. Stratigraphic trends of SCP concentrations in lake-sediment cores reflect the consumption history of fossil fuels. A characteristic temporal SCP pattern, with a marked concentration increase beginning after the 1940's and a peak in the early 1970's, has been recognized in most Swedish lakes and elsewhere in Europe. A survey of SCP concentrations in surface sediments of >100 lakes covering Sweden demonstrated that polluted areas in southern Sweden had >100 times higher SCP concentrations than clean areas in the north. The spatial distribution of SCP over Sweden is similar to the deposition pattern of long-range transported airborne pollutants, such as excess sulphate monitored by network stations. SCP also accumulate in soils, and soil analyses can be used for determining the integrated historical deposition of SCP at the local or regional scale. Finally, SCP have been used for indirect dating of sediment cores and as a marker to assess sediment distribution patterns within lake basins.  相似文献   

浙闽山区茶叶生产基地评价的探讨   总被引：6，自引：0，他引：6  

华熙成 《地理研究》1994,13(3):98-103

茶叶基地的评价包括对基地的自然和经济条件的评估,应用系统分析方法,将自然和经济条件进行定量的综合评估,用综合评价值区分基地间的差异,最后定性与定量相结合,提出茶叶生产基地的合理布局.  相似文献