录井工程 ›› 2022, Vol. 33 ›› Issue (4): 118-124.doi: 10.3969/j.issn.1672-9803.2022.04.020
杨佩佩①, 卢异①, 周杨②, 吴刚①, 李文亮①, 任光文①
YANG Peipei①, LU Yi①, ZHOU Yang②, WU Gang①, LI Wenliang①, REN Guangwen①
摘要: 为了实现南港油田沙一下亚段板2油组孔隙-裂缝双重介质油藏的高效开发,综合岩心、常规测井、三维地震资料开展裂缝预测及成因研究。通过常规测井曲线的裂缝响应特征,建立裂缝识别常数模型,评价裂缝纵向发育情况,同时利用地震多属性的人工神经网络方法,测井与地震数据相结合预测裂缝平面分布范围。预测结果表明,区域主断裂走向为NE向,同时伴生了多条NW、NE、EW向裂缝,主要分布在G 178井断裂和B 228井断裂之间的区域,裂缝的形成与分布明显受隐伏走滑断裂带的控制,双断裂斜交的伴生破碎带所形成的地垒式构造区域裂缝最为发育。综合裂缝发育情况、砂岩厚度以及产能评价结果,将储层划分为4类,其中:裂缝发育且厚度大于10 m的砂岩为Ⅰ类储层,试油无需压裂,自喷高产;裂缝不发育但厚度大于10 m的砂岩为Ⅱ类储层,试油具备一定产能,压裂后可高产。Ⅰ类、Ⅱ类储层发育区域是下步勘探开发的重点目标区。
中图分类号:
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