岩性油气藏 ›› 2026, Vol. 38 ›› Issue (1): 191200.doi: 10.12108/yxyqc.20260117
• 石油工程与油气田开发 • 上一篇
XUN Xiaoquan1(
), LI Hongtao2, LI Changping1, YANG Fan1, LIU Xiong3
摘要:
为了定量评价强非均质性气藏压裂水平井各压裂段初期产气量的贡献率,以鄂尔多斯盆地东胜气田新召气区二叠系盒1段气藏为例,基于储层地质工程参数、压裂缝特征、产气剖面测试分析,提出了综合地质工程因素的“缝控储量”的分段产量劈分新方法。研究结果表明:①东胜气田新召气区二叠系盒1段气藏压裂缝特征受到地质和工程双重因素控制,相同施工参数下,物性越好,压裂缝半长越短;相同地质条件下,施工排量越大、入地净液量越大,压裂缝半长越长,射孔簇数越多,压裂缝半长越短;同一区域,不同类型储层压裂缝半长与波及宽度比一致。②水平段各压裂段产出明显受到地质工程因素影响,物性好、含气性好、压裂施工规模大,压裂后产能越高。③综合考虑地质工程因素,明确改造的“缝控储量”与强非均质性气藏水平井各压裂段初期产能呈线性关系,相关系数达到0.997,表现为缝控储量高,各压裂段产能占比高。通过“缝控储量”劈分方法与产气剖面测试结果对比发现,Ⅰ类、Ⅱ类储层各段劈分产气量相对误差在12%以内。
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