石油与天然气地质 ›› 2018, Vol. 39 ›› Issue (2): 254-267.doi: 10.11743/ogg20180205
范彩伟
收稿日期:
2017-06-22
修回日期:
2018-01-21
出版日期:
2018-04-28
发布日期:
2018-05-16
第一作者简介:
范彩伟(1973-),男,高级工程师,莺-琼盆地油气地质勘探。E-mail:fancw@cnooc.com.cn。
基金项目:
Fan Caiwei
Received:
2017-06-22
Revised:
2018-01-21
Online:
2018-04-28
Published:
2018-05-16
摘要: 莺-琼盆地为新生代的高温高压快速沉降盆地,通常伴随着热流底辟体的发育,形成了异于常压盆地的油气输导体系,由地层深部压力释放形成的底辟和裂缝是莺-琼盆地天然气运移的主要输导通道。研究利用沿层三维地震相干分析及曲率分析技术对莺-琼盆地高压底辟型和裂缝型输导体系进行了系统的识别,研究其空间展布特征及演化过程,结合天然气同位素及包裹体等地球化学手段,综合分析了高压成因输导体系与研究区天然气充注、散失及富集成藏的关系。研究结果表明,底辟型和裂缝型输导体系在空间分布上具有由深向浅阶梯状发育的特点,其中底辟型输导体系通常发育在莺歌海盆地的中央坳陷带,裂缝型输导体系主要分布在盆地热流底辟的边缘、斜坡近凹区的高压地层中。底辟型输导体系的发育演化历史可以划分为增压期、穿刺期、平衡期、释放期和塌陷期五个阶段(类型),具有增压期深部充气、穿刺期浅层成藏、平衡期复合成藏、释放期翼部成藏、塌陷期破坏成藏的成藏规律。裂隙型输导体系具有高压和构造两种成因,天然气具有浅部早、深部晚的成藏规律。
中图分类号:
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摘要 283
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