碳氧比能谱技术在岩心录井中的应用探讨

Application of carbon/oxygen spectrum technique in core logging

碳氧比能谱技术主要是利用快中子与地层发生非弹性散射时产生的碳和氧的特征伽马射线的比值来确定套后含油饱和度,在测井行业已成功地使用了多年。该文从该技术的仪器原理、解释模型的建立等方面对其在录井行业的应用进行了探讨,由于录井的测量对象都是在常温、常压下进行的,因而得到的结果应该更能反映岩石性质,该技术在录井的成功应用对地层含油饱和度的确定将发挥更好的作用。

Carbon/oxygen spectrum technique uses the ratio of characteristic gamma ray of carbon versus oxygen when fast neutron and formation have non-elastic dispersion to determine oil saturation. It is used in logging industry for many years. This paper discusses its application in logging in respect of the working principle of instrument and construction of interpretation model. Logging measurement is performed in normal temperature and pressure, so the result can show rock property better. This technique can help to determine oil saturation in formation.