机械采油方式的经济效益计算与分析

本文计算了两种主要机采方式的经济效益指标；通过指标构成分析，首次提出最佳经济含水率上限的概念，并经过理论推导给出了各型号采油设备最佳经济含水率上限及经济极限含水率的通用计算公式，且对经济效益的影响因素进行了敏感性分析。     

大庆油田电泵井套管杂散电流腐蚀测试分析

针对萨北油田北部过渡带地区电泵井套管腐蚀外漏频繁的现象,对套管腐蚀坑形态进行了分析.结果表明:腐蚀坑呈外喇叭状,创面光滑圆亮,坑内发黑,无腐蚀产物或很少,为杂散电流腐蚀痕迹.对该区电泵井进行地下土壤电阻率测试及现场连续监测发现,地下不同深度存在杂散电流,电泵井套管腐蚀是土壤腐蚀及杂散电流腐蚀综合作用的结果.     

大庆油田油水井套管手镯阳极防腐技术的应用

现场测定测试井的土壤环境，发现大庆地区土壤中Cl-含量、SO2-4含量均较高，地下土壤电阻率变化较大，在土壤纵向深度上对钢质设备构成强腐蚀影响环境.采用地下参比电极“接触测试”法，对套管实施保护后的纵向深度套管保护电位进行定量测试.结果表明，套管保护电位曲线光滑，电位均负于-850 mV，套管保护电流可极化到地下100 m.手镯阳极与套管同时下入作业井内，不增加现场作业难度及作业成本，具有实际推广应用价值.     

滨南油田污油泥调剖技术

污油泥调剖技术利用含油污泥与地层有良好的配伍性,以污油泥为主要原料,采用化学方法,添加活性稠化剂,形成活性稠化污油泥调剖剂,当泵入地层大孔道时,在注水过程中随注入水沿大孔道缓慢运移聚集沉降在大孔道中,形成较大粒径的团粒结构,起封堵大孔道的作用,迫使注入水改道进入中低渗透层段,驱替中低渗透层段的原油,从而扩大注入水的波及体积,调整水驱剖面,提高水驱效率.     

沙样水体自动控制分离器开发与应用

多年来,黄河泥沙处理一般采用置换法,这种原始的泥沙水体分离方法是利用虹吸管由人工抽取清水,此法存在误差大,工作效率低等问题.因此,笔者结合黄河水文实际,研制了“沙样水体自动控制分离器”,分析器采用单片机自动把清水与泥沙分离开,完成清浑水自动分离过程,该分离器已在黄河山东水文工作中应用,实践证明,不仅提高了泥沙测验精度,而且提高了工作效率,具有一定的推广应用价值.     

Long-term antibacterial properties and bond strength of experimental nano silver-containing orthodontic cements

The purpose of this study was to evaluate the long time antibacterial properties and shear bond strength of experimental nano silver-containing cements (NSC). Nano silver base inorganic antibacterial powder was added to the reinforced glass ionomer cement at five different weight ratios to obtain a series of nano silver-containing cements, then the antibacterial properties of three orthodontic cement products and five NSC samples were evaluated by the direct contact test (DCT) and the agar diffusion test (ADT). The DCT, which was based on turbidness determination of bacterial growth in 96-well microtiter plates, was performed in both fresh and aged for 1 day, 1 week, 2 weeks, 3 weeks, 4 weeks, 6 weeks, and 8 weeks tested materials. The shear bond strengthes of three orthodontic cement products and five NSC samples were examined using a universal testing machine. The ADT results indicated that there were no significant differences between NSCs and ORTHO LC fresh specimens. In the DCT experiment, all fresh silver nanoparticles-containing tested samples presented powerful antibacterial properties, but they gradually lost the effective antimicrobial agents with the extension of aging time. Finally, none of the tested materials maintained its antibacterial property after aging for 8 weeks. A gradually decreasing trend of bond strength presented with the increasing incorporation of nano silver base inorganic antibacterial powder into the glass ionomer cement, even though all the tested material specimens reached the ideal bond strength range. We may conclude that NSCs can contribute to decrease the demineralization rate around brackets without compromising bond strength.     

低渗透储层水锁伤害影响因素室内评价

针对低渗透储层因水锁引起的地层伤害问题,开展了水锁伤害影响因素室内评价。通过实验数据结果分析,随着地层含水饱和度的增加,则气相渗透率下降;岩心渗透率越低,作用时间越长,岩心水锁伤害越大;驱替压差越大,岩心水锁伤害越小;活性剂能够减轻岩心的水锁损害。     

大庆油田油水井套管侧挂串状阳极防腐模拟实验研究

针对大庆油田油水井浅表层套管腐蚀外漏逐年加剧的问题，对于正常生产的油水井套管的防腐保护提出套管外壁侧埋深井牺牲阳极串的防腐蚀技术.通过室内模拟实验，发现在水电阻率和阴-阳极面积比近似相同的情况下，深埋阳极对套管的保护效果明显优于浅埋阳极，阳极以串、并联组合方式连接有较大的电流输出和较好的电位分布.结果表明，阳极以深埋方式为宜，阳极埋入深度在3000 cm～5000 cm左右为最佳位置，阴阳极间最佳距离为900 cm.     

青海玉树旁安金矿区地球化学异常特征及找矿潜力分析

旁安金矿区位于北巴颜喀拉造山带大场金矿田东北缘。1∶20万水系沉积物测量结果显示,Au、As、Sb元素与邻区相比具有明显高背景特征;1∶5万水系沉积物测量显示,Au元素异常规模大、强度高,并伴生Mo、Sn、Hg、W等元素异常。利用1∶1万土壤地球化学测量缩小找矿靶区,圈出以Au元素为主的土壤综合异常15处(AP1—15),异常浓集中心突出,梯度变化大,套合好;综合异常受北西向断裂和早—中三叠世昌马河组双重控制。通过对土壤综合异常AP2、AP6查证,探获4条矿体,金资源量2.08 t,金平均品位2.76×10^-6,该矿床达到小型规模,证实综合异常为矿致异常。通过对区域成矿地质条件的分析,并与邻近大场金矿区进行对比,结合土壤地球化学测量结果,认为旁安金矿区具有良好的找矿潜力。