南海深水区白云凹陷烃源岩热演化与油气资源潜力预测

发布时间：2018-01-11 15:18

  本文关键词：南海深水区白云凹陷烃源岩热演化与油气资源潜力预测　出处：《热带海洋学报》2017年01期 　论文类型：期刊论文

  更多相关文章： 珠江口盆地 白云凹陷 烃源岩热演化及排烃量 聚集系数 资源潜力

【摘要】：基于钻井、测井、地震及地质等资料及盆地数值模拟技术,结合成因法及类比法,对南海深水区白云凹陷现今地温场特征、烃源岩热演化、烃源岩排烃强度、烃源岩排烃量以及已发现油气田石油、天然气聚集系数进行了系统研究,进而综合预测白云凹陷油气资源潜力。研究表明,白云凹陷地温梯度较高,介于34~67℃·km~( 1)之间,均值为40℃·km~( 1),有利于有机质的成熟与烃类生成;各烃源岩现今均处于成熟生油或过成熟生气阶段,烃源岩成熟度从珠海组顶面到文昌组底面增幅较大,文昌组烃源岩底面过成熟面积占凹陷面积的53.7%;各烃源岩排气强度均大于排油强度,且恩平组上段为主力排烃层位;文昌、恩平及珠海组3套烃源岩总排烃量为1143×10~8m~3油当量。且结合石油、天然气聚集系数预测白云凹陷保守资源量为25.2×10~8m~3油当量。
[Abstract]:Based on drilling, logging, seismic and geological data and basin numerical simulation technology, combined with genetic method and analogy method, the characteristics of present geothermal field, thermal evolution of source rock and hydrocarbon expulsion intensity of source rock in Baiyun Sag, South China Sea deep water area are studied. The hydrocarbon expulsion capacity of source rock and the oil and gas accumulation coefficient of oil and gas fields have been systematically studied, and the potential of oil and gas resources in Baiyun sag has been comprehensively predicted. The results show that the geothermal gradient of Baiyun sag is high. The average value is 40 鈩，

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