为了减少海上油田管柱复杂结构组成以及井内不同流体体积导致C/O能谱测量值的差异对脉冲中子法确定油田剩余油饱和度的影响,利用蒙特卡罗方法建立不同管柱、孔隙度和地层流体等条件下计算模型,模拟不同管柱条件下非弹性散射伽马能谱,研究C/O能谱值随孔隙度、流体饱和度变化的响应规律,得到不同管柱条件下剩余油饱和度解释模型,对2口不同管柱井资料处理,取得了较好效果,研究结果可为海上油田剩余油饱和度动态监测提供技术支持.%Pulse neutron logging plays an important role in monitoring residual oil in the oil field development.The composition and structure of strings are complex in the offshore oil field,and then the C/O value is different owing to the difference fluid volume in the well,so there are influence on determining residual oil saturation.The model of different pipe string,porosity and formation fluid,etc.,was established byusing Monte Carlo method,then the inelastic scattering gamma ray spectra under the condition of different string were simulated,and the responses of the C/O values to the porosity and fluid saturation were studied.At last,we obtained the residual oil saturation interpretation model under different pipe string,and the results were credible by processing data of two wells.The result provides technical support for monitoring remaining oil saturation in offshore oil field.
展开▼
