准噶尔盆地南缘山前冲断带芦草沟组储层含气性及主控因素分析——以米参2井为例

在野外地质考察、重磁电勘探成果基础上,在准噶尔盆地南缘山前冲断带乌鲁木齐一带进行了页岩气参数井——米参2井施工.综合钻探、地质综合录井、测井和分析测试数据,进行该区芦草沟组泥页岩储层含气性评价,并对储层有机碳含量、孔隙度、矿物组分和页岩裂缝发育特征等方面进行研究.分析储层含气性主控因素,旨在对识别准噶尔盆地南缘山前复杂...     

多油层分层参数测试新方法研究与实践

针对传统的压力恢复/压力降落试井方法存在的测试时间长、影响油井产量、难以获得分层地层参数等缺陷,将生产测井的流量流压资料应用到试井领域,提出了变流量法、流量-压力波动曲线法两种多油层试井新方法,实现了在油井正常生产的情况下,求取井下各小层的地层压力、渗透率、污染系数等分层地层参数,较好地解决了多层合采油井的分层参数测试难题。详细地阐述了两种多油层试井新方法的测试原理,并列举了其现场应用情况。      

测井和地震联合解释CCSD先导孔反射体

利用声波、密度、自然伽玛等测井曲线资料、配合录井资料划分CCSD先导孔变质岩岩性, 然后, 用声波、密度计算波阻抗, 与井旁VSP资料对比, 分析CCSD先导孔孔区反射体.分析结果表明(1) 岩性间波阻抗差异产生反射波, 如榴辉岩与副片麻岩之间波阻抗差异; 榴辉岩与超基性蛇纹岩之间的波阻抗差异等; (2) 破碎特别是韧性剪切带产生反射波, 而如果断层破碎带尺度很小(在1m以下), 也不一定能产生强反射波.这些研究结果对标定地壳中的反射地震信号具有重要意义.      

晋2井动水位与周围显著地震的对应关系

通过对晋2井动水位15年观测资料的清理,从多种观测信息中筛选出阶变型前兆异常,制定了阶变异常的标准,进而从阶变频率入手,提取阶变组异常作为周围中强以上地震的中短期前兆信息。通过R检验,认为晋2井动水位阶变异常与周围显著地震以及阶变组异常与周围中强以上地震均存在较好的对应关系。在实践中,利用晋2井阶变组异常,曾先后较好地预测了晋2井周围3次中强以上地震。     

五里营综合观测井地下流体震前异常特征初步研究

五里营综合观测井自１９８４年观测至今,已积累了１５年连续、可靠的资料。经过多次地震检验,该井水位、水氡、水汞等地下流体震前异常反应明显。利用该井特征性的异常形态,如脉冲、升降、方波等前兆变化对大同－阳高、张北－尚义强震及几次邻近地区４．０级以上地震曾多次作出了较好的预测。     

应用井中化探技术判别凝析气层模式探讨

井中化探异常模式与油气藏类型密切相关。介绍凝析气藏的概念与意义;叙述凝析气层的现场井中化探方法与指标特点,进而提出凝析气层的井中化探异常模式,并探讨其成因。     

井眼附近地应力分布的三维数值模拟

该文研究的井眼附近地应力分布包括了钻井前、后两种截然不同的应力状态。以大庆外围某油田为例,用三维有限单元方法,施以适当的边界力,模拟计算出原地应力场,即钻井前地应力分布特征,其大小、方向均与中国东部实测应力场一致。在此基础上,根据井径a与井心距r同比例放大或缩小时应力计算结果不变的规律,采取了扩大井口半径的手段,计算钻井后井口附近的应力场变化特征,其规律与观测到的井眼崩落结果十分一致。      

石油深井地震观测中“井管突升,地面崩裂”异常机理及其社会影响对策研究

１９７９年以来,天津地区先后有９口石油深井出现了“井管突升,地面崩裂”异常现象,本文通过这９口井的基本情况,分布特点,异常类型等方面的分析,对这一现象产生的机理进行了研究;认为;这一现象的发生是由于地面局部沉降的结果,并对其进行数值模拟,力学解释,同时提出了安定社会的三项对策。     

Confirmed faecal pollution to bore well waters of Mysore city

 Water-borne infections are the most common causes of infectious diseases in developing countries, often resulting from the lack of a protected water supply, a faulty water-supply system or improper sewage disposal. A recent study of 107 samples from bore wells of Mysore city has revealed that 51 samples (47.66%) contain Nitrate greater than 45 ppm, an indication that the water would be harmful for drinking. Out of 51 samples tested for faecal pollution, using a H₂S-strip test, 37 samples turned black and these were subjected to microbial identification. Out of these 37 samples, 63 H₂S producing strains were isolated and the H₂S producing organisms are Klebsiella ozaene;Klebsiella pneumoniae;Proteus mirabilis;Proteus vulgaris;Salmonella sp. and Citrobacter freundi. The frequency of occurrence of the above-mentioned six micro-organism strains are as follows: Proteus mirabilis (19);Proteus vulgaris (14);Citrobacter freundi (13);Salmonella sp. (8);Klebsiella pneumoniae (5); and Klebsiella ozaene (4). Klebsiella and Proteus are known to cause urinary infection and Salmonella intestional infection. Received: 7 September 1998 · Accepted: 10 November 1998     

Environmental pollution control through geo – botanical means – a case study of Manikpur block, Korba coalfield, M.P., India

 In the present paper, an environmental analysis of Manikpur area, Korba coalfield, Bilaspur, M.P., India is undertaken. The area lies in the Geological Survey of India Toposheet no. 64J/11 Latitude 82°42′54″–82°45′10″ North; Longitude 22°18′46″–22°19′46″ East. The paper deals with pollution and its control measures through the natural plants found in the vicinity of the coalmines, namely Mangifera indica, Eucalyptus spp., Cassia siamea, Delbergia sissoo, etc. The plants control the Suspended Particulate Matter (SPM), Nitrous Oxides (NOx), Sulphur Oxides (SOx) of the mines and mining site. Therefore, plantation in the mining site should be encouraged. Received: 12 May 1998 · Accepted: 6 October 1998