碳酸盐岩储层非均质性预测技术——以华北河西务地区碳酸盐岩储层为例

冀中拗馅廊固凹陷河西务构造带发现和探明的古潜山油气藏为古生界奥陶系碳酸盐岩储层,其储集空间以孔洞、裂缝为主,非均质性强,物性横向变化较大,且裂缝是影响储集性能的主导因素,因此裂缝预测对该区潜山油气藏的成藏条件分析和预测等起至关重要的作用。本文基于二次三维采集地震资料,在河西务构造带中北部地区,利用相干、体曲率、振幅和频率等多种地震属性研究奥陶系碳酸盐岩储层缝洞特征,预测和刻画储层缝洞体系的空间分布规律,划分储层发育有利区带。该区实钻结果表明,河西务构造带碳酸盐岩储层裂缝发育,油气显示良好,证实了本文所述碳酸盐岩储层特征预测技术的有效性。

Prediction of heterogeneity in carbonate reservoirs:an Hexiwu example in North China

Buried hill reservoirs of Hexiwu structure belt of Langgu sag in Jizhong Depression,which had been discovered and proved,are Paleozoic Ordovician carbonate reservoirs with many caves and fissures.They have the following characteristics: strong heterogeneity,lateral variation in properties.The fissures are the most important predominant.So fracture prediction plays a vital role on accumulation conditions analysis and prediction of hill reservoirs in this area.Based on multi-attributes,such as coherent data,b...