岩性油气藏 ›› 2015, Vol. 27 ›› Issue (2): 8391.doi: 10.3969/j.issn.1673-8926.2015.02.013
JIAO Lixin, LIU Juntian, LI Liuzhong, HAN Cheng, ZHANG Pin, LONG Fei
摘要:
三塘湖盆地多口探井相继在条湖组沉凝灰岩储集层中获得工业油流,使其成为吐哈油田热点勘探领域。 研究表明:沉凝灰岩的有机碳含量高、厚度大,是良好的烃源岩;储集层岩性除沉凝灰岩外,夹有生物碎屑、炭屑及少量泥质条带,具有一定的沉积特征;储集层孔隙度为 5.5%~24.0%,渗透率普遍小于 0.5 mD,含油饱和度平均在 70%以上,属于大孔隙、特低渗、高含油饱和度的沉凝灰岩致密油藏。通过 Δlog R方法开展烃源岩测井定量评价;以岩石薄片鉴定和全岩矿物分析为基础,通过岩心刻度测井,建立和完善沉凝灰岩与泥岩等的识别方法和评价标准;结合岩心分析、CT 扫描和毛管压力曲线资料开展储集层微观特征研究;利用组合式测井资料开展有效储集层物性评价和孔隙度计算,在岩性油藏整体认识的基础上开展含油性评价。基本形成了一套沉凝灰岩致密油藏测井评价配套技术与方法,在生产中取得了较好的应用效果。
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