侵入砂体对深水油气勘探的研究意义

侵入砂体是指深水沉积砂体在超压流体作用下侵入至上覆泥质沉积物中形成的砂体,它是深水盆地松散沉积物变形构造中常见的地质现象。侵入砂体由于其特殊的形成特点,可以明显改变原生沉积地层的几何形态和深水沉积物的物性参数,进而使储层复杂化,影响深水油气的勘探与开发,主要表现在:①侵入砂体改变了深水储层的性质及分布;②侵入砂体可能形成油气运移或散失的通道,并且改变了深水油气储层的垂向连通性;③大规模的侵入砂体本身也可以作为良好的油气储层;④侵入砂体的研究可以揭示未固结砂的流动机理,对于研究深水环境中广泛出现的浅水流的成因具有重要的借鉴意义。     

Comparison of velocity-log data collected using impeller and electromagnetic flowmeters

Previous studies have used flowmeters in environments that are within the expectations of their published ranges. Electromagnetic flowmeters have a published range from 0.1 to 79.0 m/min, and impeller flowmeters have a published range from 1.2 to 61.0 m/min. Velocity-log data collected in five long-screened production wells in the Pleasant Valley area of southern California showed that (1) electromagnetic flowmeter results were comparable within +/-2% to results obtained using an impeller flowmeter for comparable depths; (2) the measured velocities from the electromagnetic flowmeter were up to 36% greater than the published maximum range; and (3) both data sets, collected without the use of centralizers or flow diverters, produced comparable and interpretable results. Although either method is acceptable for measuring wellbore velocities and the distribution of flow, the electromagnetic flowmeter enables collection of data over a now greater range of flows. In addition, changes in fluid temperature and fluid resistivity, collected as part of the electromagnetic flowmeter log, are useful in the identification of flow and hydrogeologic interpretation.     

The Spectroscopic Orbit of the Planetary Companion Transiting HD 209458

Three new silicon-bearing radicals of astrophysical interest, SiCCH and the two nearly isoenergetic isomers SiCN and SiNC, were detected in a laboratory discharge in their X2Pi ground states by Fourier transform microwave and millimeter-wave absorption spectroscopy. Hyperfine structure was observed in the low rotational transitions of the (2)Pi(1/2) ladder, and well-resolved Lambda-doubling was observed in both fine-structure ladders. With the spectroscopic constants derived from the laboratory measurements, the spectra of all three can be calculated to an uncertainty of less than 0.1 km s(-1) in equivalent radial velocity over the entire range of interest to radio astronomers. SiCN, with a dipole moment of 2.9 D, is probably the most promising of the three for astronomical discovery.     

情、理、法结合的大学语文古典诗、词、文教学法

现行的<大学语文>大纲及教材的教学要求对古典诗、词、文都偏重于字、词、句的理解,游离了<大学语文>的教学目的.只有将古典诗、词、文中充沛的情感、深邃的义理、多样的表现手法结合起来,贯穿到教学中,才能达到<大学语文>的学习目的.也才能解决古典诗、词、文的教学瓶颈.     

惠民凹陷盘河地区孔店组石油地质特征研究

众盘深3井地质录井资料的解释入手,利用孢粉、微体化石等古生物分析资料,对盘河地区深层孔店组进行了系统的划分与对比。在此基础上,利用有机碳、饱和烃相色谱分析等多种化验分析资料,对孔二段烃源岩进行了系统评价,并对孔店组储集层进行了初步研究。研究表明,盘河深层构造条件较好,储集层发育,但孔二段暗色泥岩不具备生烃能力;同时,临南洼孢沙三段生成的油气不易运移至该区,缺乏油源是该区深层构造落空的主要原因。     

Thermal treatment as a method to control transfers of invasive biofouling species via vessel sea chests

This study examined the efficacy of heated seawater for the treatment and remediation of fouled vessel sea chest habitats. In laboratory trials, three temperature regimes (37.5°C for 60 min, 40°C for 30min and 42.5°C for 20 min) were tested on a range of temperate taxa commonly found in sea chests. Field validation trials further assessed the efficacy of heat treatment within a replica sea chest environment. During laboratory trials, 100% mortality was achieved across all three treatments for the majority of taxa; the exceptions being the barnacle Elminius modestus and the oyster Crassostrea gigas. Temperature tolerance limits observed in the laboratory were successfully replicated under simulated sea chest conditions; however, a failure to achieve even heat distribution was an obstacle to achieving uniform mortality. This study provides guidance on the temperature/exposure parameters required for vessels plying temperate latitudes, and demonstrates that heated seawater has potential for controlling biofouling in vessel sea chests.     

塔东南隆起沉积－构造特征及其演化历史

基于地震剖面、岩心、测井和露头剖面等资料分析,运用平衡剖面复原技术,论述了塔里木盆地塔东南隆起带古生代以来的沉积-构造特征及其演化历史.在地震剖面上识别出6个地层不整合界面,划分了5个主要地层构造层序.指出塔东南隆起形成于晚奥陶世加里东运动,经历了加里东、海西、印支、燕山和喜山多次构造运动,在中生代以陆内变形为主,受到南北两条主边界断裂的控制,于中生代早期发生伸展断陷,并遭受晚新生代喜山运动的强烈挤压改造,形成了现今两凹两凸的构造格局.     

天然水温对生物修复污染水源除NH4+-N效果的影响研究

采用弹性填料微孔曝气生物修复方法净化受污染的某饮用水源,探讨了天然水体环境温度变化对生物除NH₄+-N作用效果的影响.结果表明,水体环境温度对生物修复工艺除NH₄+-N作用影响很大.水温越高,生物修复工艺除NH₄+-N效果越好.在较低水环境温度下,水温变化对生物修复工艺除NH₄+-N作用效果影响最大;在日常水体温度下,水温变化对生物修复工艺除NH₄+-N作用效果影响最小;在水体温度较高的条件下,水温变化对生物修复工艺除NH₄+-N作用效果影响较小.