【摘要】 大牛地气田二叠系下石盒子组盒3段气藏是典型的岩性气藏,其高效开发的关键是储层预测和储层含气性检测。目前常用的地震解释方法能比较精确地预测砂体分布,但对砂体的含气性预测则缺少有效的手段。针对该问题,从主河道发育区是盒3段高产区这一地质认识出发,以"现象—研究—总结"的思路,利用波动方程正演模拟和完钻井产能统计的方法探讨了利用反射模式识别主河道的可能性和可行性,总结并提出了河道下切式地质模型,间接实现了对盒3段主河道成因的高产区预测,实钻显示符合率在90%以上。更多还原

【Abstract】 The gas reservoir of He-3 member in Daniudi gas field belongs to typical lithological gas reservoir whose development key is reservoir prediction and gas bearing detection. At present, the commonly used method of seismic interpretation can predict sandbody distribution exactly but there is no efficient means to predict gas bearing of sandbody. In view of this problem, from the geological knowledge that the developed area of main river channel is just the high production region in He-3 member, adopting the method " phenomenon - research - summarization", using forward stimulation by wave equation and well statistics, this paper discusses the probability and applicability of identifying the main river channel by using reflection pattern, puts forward the reflection pattern incised channel after summarization, realizes indirect prediction on high production gas reservoir developed at main channels in He-3 member, and gets the beneficial distribution area. It is shown that the coincidence rate of actual drilling data is above 90%.更多还原