周立宏,于学敏,姜文亚,滑双君,邹磊落,于超
ZHOU Li-hong,YU Xue-min,JIANG Wen-ya,HUA Shuang-jun,ZOU Lei-luo,YU Chao
摘要:
沉积盆地流体动力学特征是盆地分析的主要内容,对烃源岩热演化及油气成藏具有重要的影响。以歧口凹陷为例,通过大量实测数据和分析化验资料综合分析,探讨了古近系中深层流体压力特征及对成烃演化的抑制作用,建立了超压背景下的烃源岩成烃演化模式,指出了超压存在的石油地质意义。研究表明,歧口凹陷中深层普遍发育异常高压,压力系数为1.2~1.6,属于“正常地温梯度、异常高压”环境,这种环境对古近系中深层烃源岩热演化具有明显的控制作用。超压的普遍发育对歧口凹陷中深层的液态烃下限、有效储层下限、油气保存及有效勘探深度都有十分重要的影响。
中图分类号:
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