摘要
在含油气的泥质砂岩储层中,密度、中子和声波时差测井曲线受天然气的影响很大,直接通过岩心刻度计算的孔隙度有较大的误差。以校正油气对三孔隙度测井影响为核心思想的SAND2程序在实际应用中很不完善,为此,针对实际地区,对SAND2程序做了4点修改:添加了井眼扩径对测井曲线校正的方法;用岩心刻度方法计算出的泥质含量作为固定值,减少迭代次数;油气密度的估算方法改为Poupon等人提出的计算方法;添加了储层段和非储层段(泥岩)的参数的约束条件。运用该方法编制的处理模块对研究地区的10口井进行了实际处理,经验证能较好解决该地区受气层影响的储层孔隙度计算问题。
As natural gas has a great impact on density, neutron and AC logs in shaly sand reservoir, it is hard to get exact porosity from core scale calculation. The key of SAND2 program could calibrate errors caused by those affections. Some new functions have been put into the prior defective program, such as using hole size elongation to calibrate the logs ; taking the shale content got from core scale calculation as a fixed parameter to reduce iterative times;using methods sugges- ted from Poupon to estimate the hydrocarbon density;adding restrictions from shale parameters of reservoir and nonreser- voir. And the new program has been proved to work well after being used in ten wells in the work area.
出处
《复杂油气藏》
2014年第2期30-33,共4页
Complex Hydrocarbon Reservoirs
