摘要
济阳坳陷罗家地区沙三段下亚段泥页岩油气藏具有较大的勘探潜力,预测其有机碳含量分布特征是油气勘探的关键。针对传统的实验室测定有机碳含量方法存在的采样少、成本高等问题,提出了利用地球物理技术预测泥页岩油气藏有机碳含量分布的方法。该方法在泥页岩岩石组分划分的基础上,利用富含有机碳的泥页岩低密度、低速度的物理特征,推导了单井定量估算有机碳含量的计算公式,验证了低波阻抗对于有机碳含量的敏感响应关系;并利用井、震联合反演方法预测了有机碳含量平面展布特征。该方法在罗家地区沙三段下亚段泥页岩有机碳含量预测中取得了较好的应用效果,预测的有机碳含量相对误差最大为22%,最小为0.04%,平均小于9%。
The shale reservoir in lower part of member 3 of Shahejie formation(Es3) in Luojia area has significant exploration potential, and the key of exploration is prediction of the distribution character of the total organic carbon. In order to solve the problem of higher cost and less sampling in traditional laboratory measurement, we proposed geophysical techniques to predict the TOC content. Based on the division in shale rock component, using organic carbon rich shale low-density, low-speed geophysical characteristics, we established a single well quantitative estimation formula of TOC to verify the sensitive response relationship of the low impedance for TOC. And, in the use of the well-to-seismic integration method,we predicted the distribution characteristics of TOC on plane. This method obtained a preferable result in TOC prediction of shale in lower Es3 of Luojia area. The maximum relative error of the TOC prediction is 22%, and minimum 0.04%, and the average value is smaller than 9%.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2013年第5期64-67,115,共4页
Petroleum Geology and Recovery Efficiency
基金
中国石化科研攻关项目"济阳坳陷泥页岩油气富集区地震预测技术研究"(P1209)
关键词
泥页岩
有机碳含量
波阻抗
反演预测
罗家地区
shale
content of organic carbon
low impedance
inversion prediction
Luojia area
