浅谈电磁流量计在录井中的应用

该文通过对录井实例的分析,论述了应用电磁流量计实测钻井液入口流量在地质资料录取中的优势,特别是对钻井工程的监测和事故征兆的预报上具有较好的应用价值。     

孤东地区馆陶组河道砂体油藏勘探技术研究

孤东地区馆陶组为河流相沉积体系,河道砂体岩性圈闭发育,为典型的隐蔽型岩性砂体油藏。因此,加强河道砂体的识别描述和评价研究,才能实现孤东地区河道砂体勘探的新突破。本文针对孤东地区馆陶组地质特点,以高精度三维地震资料为基础,形成了"水平切片、测井约束反演、地震属性分析、三维可视化和油气检测评价"等勘探技术。河道砂体识别描述技术的综合研究,对指导孤东地区馆陶组河道砂体勘探具有重要的作用。     

Permeability and alteration within the Soultz granite inferred from geophysical and flow log analysis

The 1993 stimulation tests carried out in well GPK1 at Soultz, Alsace, France, showed that out of the thousands of fractures cross-cutting the granite, only a limited number of natural fractures contributed to fluid flow. A comparison between the petrophysical properties of the rock and the interpretation of the hydraulic test results is proposed as a means of determining the distribution of the natural permeable fractures. Gamma-ray spectral logs and other geophysical logs (caliper, bulk density, P-wave slowness, and photoelectric factor) revealed some petrographical variations within the Soultz massive granite, as well as altered/fractured zones that act as preferential pathways for fluid flow as indicated by flow logs. Fluid losses during circulation tests have been estimated on the basis of statistical analysis of gamma-ray readings, and of potassium and thorium contents.     

Productivity and costs of slash bundling in Nordic conditions

The number of slash bundlers and the volume of slash bundling have been rapidly increasing during the last few years in Finland. However, no comprehensive time or follow-up studies have been carried out on slash bundling technology in Finland or in any other country. Metsäteho Oy carried out studies on the productivity and costs of slash bundling in different Nordic recovering conditions. The study methods included both time and follow-up studies. Data were collected during the summer and winter period primarily in Norway spruce (Picea abies L. Karst.) dominated clear cutting sites. The bundling techniques performed by different types of bundler (Fiberpac 370, Timberjack 1490D, Pika RS 2000, Valmet WoodPac) were studied.

The average productivity of slash bundling was 18.1 bundles per operating (E₁₅, including delays shorter than 15 min) hour with the Timberjack 1490D and Fiberpac 370 bundlers in the follow-up study. The operator of the slash bundler had the greatest effect on the productivity of bundling. The prerequisite for increased bundling volumes is a reduction in the costs of the most expensive sub-stage of the bundling supply chain, i.e. bundling itself. This requires improved recovery conditions at bundling sites, increased bundling productivity, larger sized bundles, and the execution of bundling operations in two work shifts using an efficient bundler and effective operator working methods. Implementation of these development measures will bring the bundling supply chain up to a speed that makes it the most competitive supply chain for forest chips in terms of total supply costs for long-distance transportation distances of more than 60 km.     

Data protection aspects in an integrated hospital information system

Data protection aspects in a large, integrated Hospital Information System are described. A special feature in this case is the interaction between the operating system BOS and a large number of application subsystems. (Both system and application software has been developed in-house by BAZIS). Integration aspects are shown to contribute to data protection. The main topic in the present article is access control; however, several measures with regard to accuracy, consistency and availability of the information (data integrity) will also be mentioned.     

江西长江河道演变遥感解译

利用多时段的航卫片和最新的TM/ETM+图像,采用目视解译和微机图像处理相结合的方法,辅以历史资料分析,对江西长江河道的演变特征进行了详细研究。基本查清了近代江西长江河道的发展演变历程,自清代以来未发生重大的变迁事件,但也处于不断演变中,其演变主要表现在河道的冲淤作用,即岸线的冲刷侧蚀后退和边滩的淤胀,江心洲、心滩、浅滩的增生淤胀、消亡和移动,河道的淤塞等。为研究洪涝灾害生成背景、致灾作用以及防灾治灾提供科学依据。     

不同直径双晶C/O仪器的响应特征比较

研究不同直径C/O测井仪器的测井响应,可以发现它们之间的优势和缺点,为仪器的研制提供参考。采用Monte Carlo方法,在孔隙度为20%的砂岩地层中,对直径为89 mm、54 mm和43 mm三种C/O仪器的测井响应进行了计算,得到了各直径仪器C/O值随源距的变化关系。经过数据处理和分析认为：大直径仪器受井眼影响最小,短源距不能对长源距起到有效的补偿作用;中等直径仪器区分地层能力最强;小直径仪器受井眼的影响最严重,其短源距能有效地对长源距起补偿作用。     

工程质量风险的经济学解释与风险防范

工程项目各参与方在不同阶段均面临不同的质量风险,并各自采取不同的质量风险管理决策。首先从新古典经济学角度,基于利益分歧对业主和承包商在工程质量风险管理方面决策进行经济学解释。建设项目业主与承包商之间、政府与项目法人之间的经济关系集中反映在信息的不对称性与契约的不完备性,从信息经济学角度分析建设项目委托代理关系的规律和基本特征,基于委托—代理关系对质量风险管理决策进行经济学解释。从经济学的角度提出了防范工程质量风险的措施。     

碳酸盐岩储层自适应性测井评价方法及应用

针对碳酸盐岩储层储集空间类型,讨论了井壁成像测井和常规测井方法的响应特征及其适应性,在此基础上提出了自适应性定量评价方法和模型,包括孔隙度模型、渗透率模型以及饱和度模型。应用该方法对塔里木盆地奥陶系碳酸盐岩储层进行了综合评价,取得了良好的效果,证明该方法具良好的适应性。