致密低渗透气田的试井特征分析--以新场气田为例

经对新场气田的试井资料处理,建立了不同类型储层典型井试井解释范例,得出低渗透试井判别式和判别图版,对该区具有低渗透特征的试井曲线进行了讨论。根据试井结果,可识别气藏(气层)储集类型,确定产层物性参数,为气藏动态分析提供基础资料。为开发致密低渗砂岩气藏、保持稳产高产奠定基础。     

浅谈水泥基渗透结晶型防水材料标准及性能指标

针对GB18445-2001《水泥基渗透结晶型防水材料》标准在使用过程中发现的一些问题，对标准中的部分性能指标的确定及试验方法提出修改意见。     

高频超声波在氧化皮中传播性能标定

对高频超声小在12Cr2MoWVTiB(G102钢）和12Cr1MoV钢钢管运行所产生氧化皮中的传播速度进行了定量标定，并对标定误差进行了统计计算，结果表明，12Cr1MoV钢氧化皮测厚标定点最大偶然误差值为0．050mm,G102钢为0．030mm，并指明了误差来源。     

硅尖阵列-敏感薄膜复合型阴极真空微电子压力传感器特性的测试

封装、测试了硅尖阵列-敏感薄膜复合型阴极的真空微电子压力传感器，在计算机模拟计算的基础上，对封装好的真空微电子压力传感器进行了实物测试，得出实物测试场发射电流曲线（开启电压低，发射电流曲线与计算机模拟曲线一样，电压45V时发射电流可达到86mA，平均每个硅尖为21μA）、压力特性曲线（呈线性变化，与计算机模拟计算的曲线相近）及灵敏度数据。电压1.5V即可测试并且其压力特性成线性变化，灵敏度为0.3μA/kPa。     

工业锅炉热效率测试方法与实践

本从测试原理、测试仪器及测试计算等方面系统介绍了利用ENERAC942－XP型燃烧效率计算机测试工业锅炉效率的一种方法。     

河口探区核销探井再评价

通过对河口探区内370口已经核销的老探井进行重新评价,认为受地质认识和采油工艺局限性的影响有21口已经核销的老探井初次试油不彻底。随着地质认识的不断完善和采油工艺的不断改进,对其中的17口井进行了重新试油均获得成功,产油量由8.94t/d增加到73.9t/d,新增探明石油地质储量6063×104t。实施核销探井再评价,不仅深化了地质认识,盘活了闲置资产,缩短了增储周期,降低了勘探成本,而且通过出油井点的突破,找到了一条高勘探成熟地区油气勘探的路子。     

Hybrid of multi-signal processing methods for detection of small objects in containers filled with beverages using ultrasound

Ultrasound backscattered signals for object detection could be too weak to be perceived when superposed to strong reflection signals, and could also be complicated either in time or frequency domain. These peculiarities raise a challenge for signal processing methods. In this paper four signal processing methods were studied to detect objects in containers. Root mean squares (RMS) method was better in object detection but needed to combine other methods to increase detection success rate. Variance, center frequency pressure ratio (CFPR) and backscattered amplitude integral (BAI) methods have similar overall detection ratings. The optimal signal size, to increase the detection ability, corresponded approximately to the length of reverberation signals before it was dissipated.     

Integrated development of CFRP structures for a topless high performance vehicle

When modern saloon cars are re-engineered as convertibles (or roadsters) it is typical for them to lose 50% or more of the body’s torsional rigidity. Consequently the vehicles rarely handle quite as crisply, nor do they ride as well as the coupes from which they derived. This paper highlights the fundamental contributions of advanced composites in achieving the desired value of handling of the Murcièlago Roadster without penalizing the overall weight of the vehicle. To compensate for the absence of the roof structure, the vehicle was strongly redesigned by introducing new structural members and reinforcing existing critical components. A new all-carbon/epoxy composite sub-frame, which spans the entire engine bay, is comprised of elliptical tubular members, and it is the first of its kind in a production vehicle. Engineering of the sub-frame, from preliminary design to manufacturing decisions, is the focus of this paper, and is achieved through a Building Block approach that sets the program within the Integrated Product Development (IPD) strategy that the Advanced Composites Division of Automobili Lamborghini S.p.A. employs for its technology demonstrators. The strategy consists in a concurrent analytical and experimental development of the product, from the initial conceptual design and coupon testing, through the stages of element and subcomponent engineering, to final component manufacturing.     

超声-回弹-钻芯综合法测强初探

基于超声-回弹综合法和钻芯法检测结构混凝土强度的原理及优缺点分析，对采用超声-回弹综合法和钻芯取样法联合测强的方法：超声-回弹-钻芯综合法进行了理论研究，并结合统计理论给出了其中相关参数的确定方法。工程实例证明，该测试方法费用合理、损伤较小，且结果可靠、精度高、可在桥梁、基础等工程中推广应用。