热中子成像测井在饶阳油田的应用

Application of TNIS Saturation Logging Technology in Raoyang Oilfield

为解决油田开发后期剩余油监测问题,华北油田引进了热中子成像测井(TNIS测井)。TNIS测井通过热中子衰减谱和热中子俘获谱得到近井地带的油气水分布,计算含油饱和度。TNIS测井能通过多个探测器记录大量地层信息形成成像文件,能够对地层进行直观地定性分析。在TNIS测井资料处理解释和评价中,通过建立引入区域特征系数解释模型,针对饶阳油田的岩性和地层水矿化度等地质特征制定了解释标准,提高了解释符合率;根据TNIS测井解释结果卡层补孔见到明显增油效果。实践证明TNIS测井为了解剩余油分布规律、寻找潜力层、识别水淹层、制订油田开发措施提供了可靠依据。

To address the problem of residual oil monitoring in the later stage of oilfield development, thermal neutron imaging system logging （TNIS logging） was introduced in Huabei oilfield. The TNIS logging uses the thermal neutron attenuation spectrum and the thermal neutron capture spectrum to obtain the oil and gas distribution in the near-well zone and could be used to calculate the oil saturation. TNIS logging can record a large amount of formation information through multiple detectors to form an imaging file, which enables visual and qualitative analysis of the formation. In the processing, interpretation and evaluation of TNIS logging data, through the establishment of an interpretation model which introduce regional characteristic coefficients, an interpretation standard was established for the Raoyang Oilfield according to the geological features such as lithology and formation water salinity. As a result, the interpretation conformity rate was improved.The oil recovery of perforated layer selected according to TNIS Logging interpretation results was significant. Application proved that TNIS logging provides a reliable basis for understanding the distribution of residual oil, finding potential layers, identifying water-flooded layers, and formulating oilfield development measures.