一种利用测井资料预测岩石可钻性的计算机方法

介绍了一种利用测井资料快速求得岩石可钻性级值的计算机方法。该方法能够比较准确地预测岩石可钻性，快速做出连续的地层可钻性剖面图。室内微钻头可钻性试验和江汉油田现场应用验证表明：该系统具有比较高的可靠性，是可以投入油田现场应用的。     

格尔木井水温异常特征及其与地震关系分析

简要介绍了格尔木井水温动态观测的环境与条件,在研究正常动态特征和影响因素的基础上,对水温异常的映震关系进行了分析,并成功地进行了一次短临地震趋势预测。探讨了水温异常的形成原因。     

Microthermometric measurement of fluid inclusions and its constraints on genesis of PGE-polymetallic deposits in Lower Cambrian black rock series, southern China

Systematic microthermometric measurements of fluid inclusions in the PGE-polymetallic deposits hosted in the Lower Cambrian black rock series in southern China were performed, and the results suggest: (1) there exist two types of fluid inclusions. TypeⅠis of NaCl-H2O system with low-medium salinity, and its homogenization temperatures (Th) and salinities are 106.9- 286.4℃ and ( 0.8- 21.8) wt%NaCl eq. respectively; TypeⅡ is of CaCl2-NaCl-H2O system with medium-high salinities, and its homogenization temperatures and salinities range from 120.1℃ to 269.6℃ and ( 11.4- 31.4) wt%NaCl eq., respectively. The typeⅡ fluid inclusions have been discovered for the first time in this kind of deposits; (2) two generations of ore-forming fluids were recognized. Characteristics of fluid inclusions in the PGE-polymetallic ores and carbonate-quartz stockworks in the underlying phosphorites are almost of no difference, they may represent ore-forming fluids at the main metallogenic stage. The peak value of homogenization temperature of those fluid inclusions is about 170℃, while their salinities possess a remarkable bimodal distribution pattern with two peak values of (27-31) wt%NaCl eq. and (4-6) wt%NaCl eq. On the contrary, fluid inclusions in the carbonate-quartz veins in the hanging wall may represent ore-forming fluids at the post-metallogenetic stage. The homogenization temperatures and the peak values of salinities are mostly 130-170℃ and (12-14) wt%NaCl eq., respectively; (3) nobel gas isotopic composition analyses in combination with the microthermometric measurements of fluid inclusions suggest that the ore-forming fluids at the main metallogenetic stage were probably derived from mixing of basinal hot brines with the CaCl2-NaCl-H2O system and seawater with the NaCl-H2O system; (4) in the Early Cambrian, the basinal hot brines were trapped in the Caledonian basins, which were distributed along the southern margin of the Yangtze Craton, and where giant thick sediments were accumulated, and expelled and migrated laterally along the strata because of the pressure caused by overlying sediments. The basinal hot brines absorbed Ni, Mo, V, PGE from the surrounding rocks and were transformed into ore-bearing hydrothermal fluids with the CaCl2-NaCl-H2O system and medium-high salinities, then ascended along faults and mixed with seawater of the NaCl-H2O system, and finally PGE-polymetallic deposits or occurrences were formed in the black rock series.     

Primary Ore Mineral Assemblage and Fluid Inclusion Study of the Batu Hijau Porphyry Cu-Au Deposit, Sumbawa, Indonesia

Abstract. The Batu Hijau porphyry Cu‐Au deposit, Sumbawa Island, Indonesia, is associated with a tonalitic intrusive complex. The temperature‐pressure condition of mineralization at the Batu Hijau deposit is discussed on the basis of fluid inclusion microthermometry. Then, the initial Cu‐Fe sulfide mineral assemblage is discussed. Bornite and chalcopyrite are major copper ore minerals associated with quartz veinlets. The quartz veinlets have been classified into ‘A’ veinlets associated with bornite, digenite, chalcocite and chalcopyrite, ‘B’ veinlets having chalcopyrite bornite along vuggy center‐line, rare ‘C’ chalcopyrite‐quartz veinlets, and late ‘D’ veinlets consisting of massive pyrite and quartz (Clode et al., 1999). Copper and gold mineralization is associated with abundant ‘A’ quartz veinlets. Abundant fluid inclusions are found in veinlet quartz consisting mainly of gas‐rich inclusions and polyphase inclusions throughout the veinlet types. The hydrothermal activity occurred in temperature‐pressure conditions of aqueous fluid immiscibility into hypersaline brine and dilute vapor. The halite dissolution (Tm[halite]) and liquid‐vapor homogenization (Th) temperatures of the polyphase inclusions in veinlet quartz range from 270 to 472d?C and from 280 to 454d?C, respectively. The estimated salinity ranges from 36 to 47 wt% (NaCl equiv.). The apparent pressures lower than 300 bars are estimated to have been along the liquid‐vapor‐halite curve for the fluid inclusions having the Th lower than the Tm that trapped the brine saturated with halite, or at slightly higher pressure relative to liquid‐vapor‐halite curve for the fluid inclusions having the Th higher than the Tm that trapped the brine unsaturated with halite. The actual temperature and pressure during the hydrothermal activity at the Batu Hijau deposit are estimated to have been around 300d?C and 50 bars. At such temperature‐pressure conditions, the principal and initial Cu‐Fe sulfide mineral assemblages are thought to be chalcopyrite + bornite solid solution (bnss) for the chalcopyrite‐bearing assemblage, and chalcocite‐digenite solid solution and bnss for the chalcopyrite‐free assemblage.     

深直井旋转钻柱空转功率消耗的数学建模

通过对深井旋转钻柱空转功率消耗因素的分析，考虑空转时离心力作用在井壁上引起的摩擦力导致的功率消耗，并将钻井液视为牛顿液体，运用柱坐标系建立了旋转钻柱在深井作业条件下空转功率消耗的分析模型。综合考虑空转功率与钻柱旋转的角速度、钻柱与井眼结构参数、钻井液粘度系数等因素间的关系，即旋转钻柱运动过程中的离心力和钻井液作用在钻柱上的剪切应力对功率的影响，建立了更加符合实际工况的数学模型。     

多物理场测井数据联合反演研究进展

联合反演方法在综合地球物理数据分析中应用效果明显,并起着越来越重要的应用,其方法同样也可以应用于多物理场测井数据联合反演.文中阐述了测井联合反演的必要性,综述了测井约束反演和测井数据联合反演的国内外研究现状.根据参与联合反演的数据类型和地层模型的不同,将联合反演进行了分类;研究并举例推导了不同类型测井数据的联合反演方法的原理及具体算法,最后指出了多物理场测井数据联合反演的发展方向.     

井筒电加热改善水平井蒸汽吞吐效果机理实验

针对稠油水平井蒸汽吞吐面临入井渗流阻力大、产量水平低、吞吐递减率高、采收率偏低等问题,提出了电加热辅助水平井蒸汽吞吐方法.首先根据水平井蒸汽吞吐过程中的电加热与蒸汽复合传热特征,建立了电加热辅助蒸汽吞吐三个阶段的(注汽阶段、焖井阶段、生产阶段)储层升温解析模型,在此基础上,设计并开展了电加热辅助蒸汽吞吐和常规水平井吞吐...     

哈萨克斯坦下卡姆卡5-T号井前兆异常特征

介绍了哈萨克斯坦的下卡姆卡5-T井的水文地球化学环境,对其15年来的交换资料进行了初步的统计与分析。结果表明,在震中距300 km、400 km范围内,5、6级地震的异常项目比例可达71.4%、51.4%,而7级大震(或6级震群)远兆的异常比例则仅为7.2%,且5级、6级和7级地震(或6级震群)在异常时间、异常形态上各有其特点和差异,部分5级地震还存在异常叠加的现象。各个观测项目的映震能力存在一定的差异。     

裂隙-管道介质泉流域水文地质模拟试验

为了深入认识岩溶泉流域的流量过程影响因素和作用机制,以西南岩溶泉流域水文地质概念模型为原型,建立了实验室尺度下的裂隙-管道介质物理模型和数值模型。选取补给雨强、泉口直径、落水洞与开采井的位置作为影响因子,模拟了泉流量过程。试验结果表明:单次降水试验可以观测得到泉流量增加、平稳波动和衰减共三个阶段;同一泉口直径条件下,补给强度对泉流量衰减系数的影响极小,直径为3,4,5,7 mm的泉口直径对应的衰减系数分别为0.003 6,0.006 7,0.011 5,0.012 9,泉口直径与衰减系数呈近似对数关系;落水洞汇流水量占泉流量的比例远大于裂隙;2~3 mm是微小裂隙与较大裂隙的过渡区域,两种类型的介质泉流量过程差异明显;开采井分别位于泉口附近、模型中间位置和落水洞时,泉流量衰减系数依次减小。