摘要
为了对PNN饱和度测井技术影响因素有深入的认识和拓宽PNN测井应用范围,利用蒙特卡罗方法(MCNP)做模拟研究,进行了孔隙度、矿化度、含油饱和度、井眼等因素对计数率的影响研究、PNN饱和度测井同脉冲中子—伽马测井对比研究以及PNN测井确定孔隙度的理论研究,分别给出了:不同因素对热中子计数率的具体影响结果,PNN饱和度测井同脉冲中子—伽马测井相比具有一定的优越性;不同因素条件下孔隙度的确定公式。在大港油田的实际应用表明,该项测井技术在判断水淹层,寻找潜力层和未动用层,有效识别气层,识别低阻油层,定量计算地层含油饱和度、中子孔隙度,定性识别岩性等地质应用方面发挥着重要作用。
Aimed on further understanding of the influencing factors for PNN saturation log, and widening the application of this technology, the influencing of factors, such as porosity, salinity, borehole on count rate were studied through MCNP simulation. The PNN saturation logging was also contrasted with pulse neutron-gamma logging. The theory for porosity defi nition by PNN saturation log was researched. The influences of different factors on thermal neutron count rate have been shown. Compared to pulse neutron-gamma logging, PNN saturation logging has special advantages. The formula for definition of porosity at different conditions was proposed. The application of the technology in Dagang Oil Field showed that it had a series functions in geological application, such as flooded area determination, remaining oil layers seek, gas layer recognition, low resistivity recognition, quantitatively calculation of oil saturation, porosity determination by neutron, lithology distinguish, etc.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2009年第A01期57-62,共6页
Oil Drilling & Production Technology
