准噶尔盆地北三台地区侏罗系储层流体包裹体研究     

潘福友 《地质科技情报》2007,26(6):71-75

北三台地区侏罗系储层经历了多次构造运动的改造.对研究区11口井101块流体包裹体样品的系统分析结果表明,该区侏罗系储层具有多期次的油气充注特征.流体包裹体的均一温度和油包裹体的荧光颜色(强度)等测试结果表明,研究区侏罗系储层经历过4期热流体活动,捕获了3期油包裹体和1期天然气包裹体,分别对应地质历史时期3次油充注和1次天然气充注过程.3期油包裹体的均一温度分别为40～65,65～80,80～120℃.油包裹体和盐水包裹体均一温度以及盐水包裹体盐度的统计结果表明,第2期和第3期热流体活动占主导地位.结合埋藏史分析可知,油充注发生于燕山期,天然气成藏发生在喜山早期.研究区现今油气与古油气无论在油气组分还是在成熟度方面都存在明显的差异,这种差异性与油气早期成藏后期遭受改造破坏有关.综合研究区烃源岩的生、排烃史,侏罗系储层埋藏史以及构造活动演化史的分析可知,燕山晚期是北三台地区侏罗系储层的主成藏期,燕山晚期充注的油气是现今油气的主要来源.  相似文献   

Alternatives to current GPS-RTK services and some implications for CORS infrastructure and operations   总被引：1，自引：1，他引：1  

Chris Rizos 《GPS Solutions》2007,11(3):151-158

The justification for the establishment of CORS networks was initially in support of geodesy and other geoscientific applications at the global and regional level. However, increasingly GPS CORS network operators have sought ways of making their network infrastructure the basis of a profitable business. This has arisen with the introduction of real-time centimeter-level accuracy services, carrier phase-based modes of operation generally referred to as GPS-RTK (real-time kinematic). One approach is to try to recruit a core group of users who are prepared to pay for the GPS-RTK services. But this is only feasible if the number of users, and the fees that are charged, are sufficient to generate a reasonable return-on-investment (ROI). This ROI (or at the very least “cost-recovery”) is important for many network operators in order that they may provide for the maintenance and upgrade of the CORS infrastructure. On the other hand, there are those who advocate that there is no need to recoup CORS investment, that the installed GPS receivers should be seen as public infrastructure in a similar manner to roads, bridges, etc. This paper discusses some new business and operational models for GPS-RTK services. These include models for the establishment and operation of CORS infrastructure, service provision, business cases, and options for value-added services beyond the standard GPS-RTK service. One concept is based on a “client–server” model. Currently GPS-RTK service providers have no control over the quality of the results computed by users. This makes it difficult for them to justify charging for their services. What if instead of broadcasting RTK corrections and placing the onus of obtaining a final solution on the user and his equipment, the user’s coordinates are determined by the service provider? Putting the computational effort on the server side will justify more easily the charging of users for a value-added product: an accurate and quality assured coordinate in the local reference frame. This paper describes the client–server concept as well as possible business models that may underpin such a service model. These models include some derived from mobile telephony and service/hospitality businesses. Furthermore, with the projected proliferation of independent, competitive GPS-RTK services, the concept of a GPS data or service “broker” is worth exploring.  相似文献   

雷电对石油气站的危害及预防措施     

洪展  李健荣 《气象研究与应用》2007,28(3):67-69

从雷电的基本特性及雷电对石油气、库的危害分析入手,介绍了防雷措施的主要技术要求,采取合理、安全可靠的措施来防止油库雷击事故的发生。  相似文献   

自动雨量站降雨资料质量评估方法研究   总被引：8，自引：0，他引：8       下载免费PDF全文

张强涂满红  马舒庆杨志彪 罗永春 《应用气象学报》2007,18(3):365-372

利用19种不同型号的自动雨量站2005年6—9月在北京 (54511)、宜昌 (57461) 和南京 (58238) 3站的实测对比观测资料, 进行降雨资料质量评估, 不同的评估方法将会导致评估结果的差异。结果表明:采用自动气象站降雨资料和雨量筒人工定时观测记录作为降雨量参考标准对自动雨量站进行评估时, 由于降雨量参考标准本身存在的不确定性, 或多或少影响了评估结果的准确性。在广泛试验的基础上, 提出了采用基于各自动雨量站观测结果的拟合降雨量作为降雨量参考标准的新思路, 并对拟合降雨量的可行性、适用性以及计算方法进行了详细论述。  相似文献   

Attenuation in the uppermost inner core from PKP recordings at African seismological stations     

M. Ivan  G. R. Moloto-A-Kenguemba 《Studia Geophysica et Geodaetica》2007,51(2):221-230

The attenuation factor Q_P at the top of the inner core is evaluated by using the amplitude spectral ratio of PKPdf and PKPbc phases observed at African stations (BGCA mostly), from strong deep earthquakes in the Pacific Ocean area. The maximum depth of penetration of the PKPdf phase into the inner core (IC) is roughly 377 km, and the sampled region of IC is centered beneath the Southern Indian Ocean. The derived mean value of Q_P is 249 ± 31 (95% confidence level) in the frequency range 0.2–2 Hz, where no frequency dependence of attenuation has been reliably observed. By using Student’s t-test, we show that the value is statistically significantly different (with a probability greater than 95%) from other mean values of Q derived by using the same method, for both the western (180 °W to 40 °E) and eastern (40 °E to 180 °E) hemispheres of the IC. The decrease of Q with the radius of the turning point (denoted by r^TP), according to Q_P = 840 − 0.62 r^TP, has a moderate statistical support (the R-squared value is 38%). A slightly increase of Q as a function of the angle of the PKPdf path within the inner core with respect to the Earth’s spin axis is observed, in agreement with various investigations performed in the time domain. However, the value of the anisotropy, if any, is suggested to be around 3%.  相似文献   

Gas charging history of the Yingcheng Formation igneous reservoir in the Xujiaweizi Rift, Songliao Basin, China   总被引：2，自引：0，他引：2  

C.Q. Li  Y.M. Pang  H.L. Chen  H.H. Chen 《Journal of Geochemical Exploration》2006,89(1-3):210

Systematic analysis of fluid inclusions was carried out on 34 samples from the Yingcheng Formation igneous reservoir of the Xujiaweizi rift, Songliao Basin, China. On the basis of petrographic characterization, the results of the microthermometric analyses indicated that the Yingcheng Formation igneous reservoir trapped six clusters of pure aqueous inclusions, and only four of them have the coeval gas-bearing aqueous inclusions been detected in the analyses. So the Yingcheng Formation igneous reservoir experienced four gas charging events during its evolutionary history. Combined with the research results of burial history and cap rocks, the four gas charging events happened during the time interval from 120 to 85 Ma, and every charging time is no more than 10 Ma. The main gas charging is the third, which happened during the time interval from 105 to 95 Ma.  相似文献   

最优尺度回归在储层孔隙度主控因素分析中的应用          下载免费PDF全文

马鹏杰  佟昕  张世奇  慕小水 《沉积与特提斯地质》2015,35(3):68-74

本文以实测物性、粒度分析及铸体薄片鉴定为基础,结合对东濮凹陷濮卫地区沙二-沙四段储层孔隙度影响因素的分析,利用最优尺度回归方法,定量分析了储层孔隙度的主控因素。研究表明,最优尺度回归可以简便快捷地定量分析多因素对孔隙度的重要程度。分析结果显示各类影响因素重要性排序为:含油级别、层位、胶结物含量、储层与膏盐岩位置关系、压实减孔率及分选系数。成岩作用早期,分选性决定了储层的初始孔隙,压实作用是孔隙度减小的最主要的原因;成岩作用中后期,烃类充注是储层孔隙度得以保存的最主要的原因。  相似文献   

京广沿线高铁站腹地的范围与结构研究     

董瑶  孟晓晨 《地理科学进展》2014,33(12):1684-1691

随着高铁网络建设全面展开,高铁这一新兴交通方式已在旅客运输中占据重要地位,极大地影响了人们对出行交通方式的选择.为研究高铁车站影响范围与结构,本文选取京广沿线14个高铁站为研究对象,引入“客流腹地”与“商务客流腹地”的概念,分别从总客流和商务客流的角度研究高铁站腹地的范围与结构,并结合相关理论深入探讨其影响因素.研究结果表明:京广沿线高铁站客流腹地的平均腹地半径约为151 km,大于其商务客流腹地(139 km);高铁站客流腹地范围大小与高铁站服务能力、乘客外部出行距离呈正相关,与乘客内部交通出行成本呈负相关;而高铁站商务客流腹地范围大小与高铁站服务能力、商务乘客外部出行距离呈正相关,与商务乘客内部交通出行成本呈负相关.高铁站客流腹地与商务客流腹地均具有明显的“核心—外围”结构,其中客流腹地的“核心—外围”结构与人口分布结构呈正相关,与乘客内部出行时间结构呈负相关,而商务客流腹地的“核心—外围”结构则与城市GDP结构呈正相关,与商务乘客内部出行时间结构呈负相关.  相似文献   

四川部分台站迁移新旧站址观测资料对比评估   总被引：2，自引：0，他引：2  

赵晓莉  苑跃  陈中钰  刘霄  王凌  吕结 《四川气象》2014,(2):72-76

利用四川近年台站迁移新旧站址对比观测资料,采用统计检验方法,对新旧站址观测资料进行对比评估.结果表明：迁站后观测环境得到改善,热岛效应影响减小,气温降低,相对湿度和风速升高.迁站对气温极值的影响大于平均值,对降水、相对湿度和风向的影响较大,新旧站址的风向一致性较差.由于旧站址遭受破坏的程度,周边障碍物的存在形式、所处方位、距离、下垫面状态及迁移距离、高差等的不同,造成对气象要素的影响程度会不同,从而造成迁站对各站及各要素影响的差异.  相似文献   

自动气象站湿球温度快速计算方法   总被引：1，自引：0，他引：1  

魏华兵  郭江峰 《气象》2011,37(8):1038-1041

湿球温度是采暖通风、电厂冷却塔等工程设计中的重要气象参数。随着自动气象站在台站的广泛使用,湿球温度的直接观测资料逐渐停止,这给工程设计中湿球温度的气象参数分析和气象资料的应用造成了困难。对于自动气象站湿球温度的计算,现提出基于地面气象观测的湿度参量公式和牛顿迭代法基本思想,采用简化一般的迭代公式,并利用湿球温度的经验公式计算初始值,采用EXECL电子表格完成湿球温度的迭代计算。结果表明,该方法计算湿球温度,精度较高,计算量较小,计算过程简单可控,可广泛应用于自动气象站的湿球温度计算。  相似文献