B&WB-130/3.82-M型锅炉提产技术改造

随着我厂氧化铝产量的提高,生产用热负荷也相应增大,原有3台出力为130t/h的锅炉已经满足不了生产的需要。为此,我们利用原有锅炉辅机设备的裕量,投入少量的资金,成功地将原出力为130t/h的锅炉提产改造为出力150t/h,大大缓解了生产用热的供需矛盾,取得了较好的节能效果。同时,借此次锅炉提产改造的机会,将原有锅炉存在的技术难题也一并得到解决。

影响煤层气单支压裂水平井产量关键要素及提产对策——以郑庄区块开发实践为例

单支压裂水平井作为沁水煤层气田煤层气开发主体技术,支撑了气田20亿m~3/a产气量的突破。但在其规模推广应用过程中,出现井间产量差异大,局部区域适应性欠佳等系列问题,严重制约了气田煤层气产量进一步提升。一方面,众多影响单支压裂水平井产气量的关键要素已被确认,但核心关键要素却不明确;另一方面,关键要素的平面变化规律认识,普遍为简单数学外推或纯粹数学反演,缺少地质约束和修正,可靠性和分辨率低。故亟需落实影响产量核心关键要素,以此为基础建立针对性提产技术对策。首先,基于郑庄区块客观地质条件和开发生产实践认识,提出影响单支压裂水平井产量的核心关键要素初步筛选原则,并评选出纯煤层进尺、水平段倾斜幅度、全烃、GR(自然伽马)、压裂段数、平均砂量梯度、平均排量梯度、平均液量梯度、解吸压力梯度9项要素。用灰色关联分析和单因素分析方法,明确初筛9项要素与单支压裂水平井产气量间的关联程度,落实要素对产量影响的内在机制。其次,从资源基础、储量控制和改造动用3个角度,结合单支压裂水平井部署和改造设计和施工具体流程分类9项要素,并依此建立针对性的提产技术对策。在井位部署阶段,利用评价井外推资料,初步明确相对富集区域,用构造导向滤波+高频相干技术处理地震资料,圈定无隐蔽性破坏构造发育区,再钻直/斜井以获取煤层段GR和全烃,落实井位部署区资源基础;在井轨迹设计和钻井阶段,利用波形聚类技术预测井位部署区内构造煤分布规律,对地震资料叠前深度偏移处理预测井位部署区内煤层厚度和起伏变化规律,用井组模式,分批次钻井,结合近钻头地质导向技术,实钻数据实时修正局部煤层认识,增加纯煤层进尺,优化井轨迹,确保更多优质压裂段,提高储层控制;在储层改造阶段,通过GR、全烃、井轨迹条件和实钻数据等优选压裂段,采用桥射联作压裂技术提升排量、砂量和液量,扩大改造规模,强化改造,提升资源动用程度。最后,运用上述对策在郑庄区内开展相关试验,在郑庄北部部署1个井组7口井,与周边早期单支压裂水平井相比,试验井较之前解吸压力高出约1~1.5 MPa,稳产气量提高近5000~10000 m~3/d。该研究评选了影响单支压裂水平井产气量的核心关键要素和以此为基础而建立的针对性提产技术对策,经现场试验检验,能大幅提高煤层气井稳产气量和解吸压力,为沁水煤层气田产量提升和采用相同主体开发技术的同行提供生产实践经验和可借鉴的成功案例。

螺杆泵采油提产增效技术研究

螺杆泵采油会受到一系列外在因素的干扰,严重影响螺杆泵在采油工程中的作用效果。本文将对螺杆泵采油的影响因素实施相应分析,并按照分析结果制定合理的增效技术,实现螺杆泵采油提产增效目标。

靖边气田泡沫排水采气工艺技术优化

泡沫排水采气工艺技术已成为目前气田常用的采气工艺技术措施,为提高泡沫排水采气工艺技术在靖边气田的应用效果,探讨了泡沫排水采气原理,从气流最大直径、携液量最小速度以及气体排液处理等角度进行分析,明确携带液处理以及气体排液变化,实现排水采气处理效果的提升。

Extraction and Supervision of Data of Chain of Custody in Computer Forensics

In case handling, electronic evidence becomes more and more popular. In order to reduce the burden of judges＇ task to determine the integrity of chain of custody, even no technique experts on the spot, this paper suggests a solution to solve this kind of problem.

Modem Information Technology （IT）： Factor for Business Efficiency and Business Driver

In conditions of high-tech industries, Information Technology （IT） is expected to help solve complex problems by expediting corporate operations and provide more efficient business processes. IT is one of the main factors to improve business efficiency. The new technologies such as virtualisation, consolidation, cloud computing, and software-based solutions are great ways to minimise resource use while maximising the business value of information systems. Technologies and innovations are necessary to ride the inevitable tide of change. Most of enterprises are striving to reduce their computing costs through the means of virtualization. This demand of reducing the computing cost has led to the innovation of cloud computing. Cloud technology offers better computing through improved utilization and reduced administration and infrastructure costs. Cloud computing is the sum of Software as a Service （SaaS） and utility computing. Cloud computing represents a fundamental change in the way computing power is generated and distributed, transforming the delivery of IT tools and products into elastic, on demand services characterized by flexible ＂pay as you go＂ payment models. More than half of European Union （EU） businesses and consumers already use some kind of cloud services. The diffusion of cloud computing is expected to generate substantial direct and indirect impacts on economic and employment growth in the EU, thanks to the migration to a new IT paradigm enabling greater innovation and productivity. The cost of using digital technologies, such as information service providers, decreases as the number of users increases. All of these factors work together to promote a rapid growth in the demand for, and supply of, IT products and services.

现行气井机械排水采气工艺技术探讨

随着低压气井的逐渐增多,气井积液将增大回压并影响气井正常生产,排水采气工艺技术成为了目前气井提产并使低产气井恢复产能的重要工艺措施。探讨了目前采气厂常见的几种机械排水采气工艺,分析了各种工艺的适用条件以及优缺点,为工艺技术的实施提供借鉴。

气举排水采气工艺适应性及优缺点探讨

针对低产水气井的生产情况,已开发出了相应的配套排水采气技术,如速度管柱排水采气技术、泡沫排水采气技术,通过实施合适的排水采气技术,及时排出井底积液,从而恢复低产气井的带水生产能力。分析了气举排水采气工艺技术的适应性及优缺点,为工艺技术优选提供借鉴,达到改善产水气井带水生产能力的目的。