马宁;龙祖烈;李清泉;陈聪;翟普强;石创;

• 1:中海石油(中国)有限公司深圳分公司

摘要(Abstract)：

根据油气有机地球化学特征、储层流体包裹体和流体PVT相态资料,研究珠江口盆地白云凹陷东部凝析气藏的成因机制。结果表明:白云凹陷东部凝析油具有高Pr/Ph、高丰度的奥利烷和双杜松烷的特征,热演化处于成熟阶段,凝析油主要来源于富陆源有机质的浅湖—三角洲相泥岩;凝析气藏天然气成熟度在1.30%～1.80%之间,为富陆源有机质的浅湖—三角洲相烃源岩高成熟阶段的产物。凝析气藏中计算凝析油成熟度约为1.00%,远低于原生凝析油成熟度(1.30%)的热力学门限;天然气为高成熟凝析气。研究区至少发生两期油气运聚,晚期形成的高成熟凝析气侵入早期充注的油藏,使油藏中的轻质组分溶于凝析气,形成次生凝析气藏。该结果为白云凹陷凝析气藏的勘探开发提供指导。

关键词(KeyWords)：流体相态;凝析气藏;成熟度;成因机制;白云凹陷;珠江口盆地

Abstract:

Keywords:

基金项目(Foundation):国家科技重大专项(2016ZX05026-003-006)

作者(Author):马宁;龙祖烈;李清泉;陈聪;翟普强;石创;

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