珠江口盆地隆起区残留洼陷地质特征与石油勘探新领域

doi:10.7623/syxb2013S2005

石油学报 ›› 2013, Vol. 34 ›› Issue (增刊二): 39-47.DOI: 10.7623/syxb2013S2005

珠江口盆地隆起区残留洼陷地质特征与石油勘探新领域

郭刚, 吴景富, 吴克强, 于开平

中海油研究总院北京 100027

收稿日期:2013-08-20 修回日期:2013-11-14 出版日期:2013-12-25 发布日期:2014-01-15
通讯作者: 郭刚，男，1976年10月生，1999年获石油大学（华东）学士学位，2007年获中国地质大学（北京）博士学位，现为中海油研究总院地质工程师，主要从事沉积和石油地质综合研究。Email：guogang@cnooc.com.cn
作者简介:郭刚，男，1976年10月生，1999年获石油大学（华东）学士学位，2007年获中国地质大学（北京）博士学位，现为中海油研究总院地质工程师，主要从事沉积和石油地质综合研究。Email：guogang@cnooc.com.cn
基金资助:
国家重大科技专项“近海富烃凹陷资源潜力再评价和新区、新领域勘探方向”（2011ZX05023-001）资助。

Geological characteristics of residual sags and a new field of petroleum exploration in the uplift area of Pearl River Mouth Basin

GUO Gang, WU Jingfu, WU Keqiang, YU Kaiping

CNOOC Research Institute, Beijing 100027, China

Received:2013-08-20 Revised:2013-11-14 Online:2013-12-25 Published:2014-01-15

摘要/Abstract

摘要：

珠江口盆地近年来勘探实践证实，储量增长主要依靠富生烃凹陷的新突破，找到发育文昌组半深湖—深湖相优质烃源岩的潜在富生烃凹陷成为该盆地增储上产的关键，因此中央隆起带残留洼陷作为石油勘探新区逐渐引起广大学者的关注。珠江口盆地中央隆起带存在19个文昌组残留洼陷，并利用“三步定洼法”系统确定残洼文昌组分布规模与结构特征，初步认为残洼具有较好的勘探潜力；通过对已证实富生烃凹陷的类比分析，运用“无井区烃源岩评价法”，指出如隆起区残洼控洼断裂活动速率大于100 m/Ma，沉降速率大于200 m/Ma，地震剖面上具有低频连续强反射特征，则残洼文昌组发育半深湖—深湖相优质烃源岩。首次提出珠江口盆地中央隆起区残留洼陷具有较大的勘探前景，对拓展新区勘探具有重要的战略意义。

关键词: 中央隆起带, 残留洼陷, 文昌组, 半深湖—深湖相, 勘探潜力, 珠江口盆地

Abstract:

In recent years, exploration practices in Pearl River Mouth Basin (PRMB) have proven that the growth of petroleum reserves mainly depends on new discoveries of hydrocarbon-rich sags. Thus, finding potential hydrocarbon-rich sags with deep and semi-deep lacustrine source rocks of Wenchang Formation has become a key step for increasing petroleum reserves and production in PRMB. As a new field for petroleum exploration, the central uplift belt of PRMB has attracted increasing attention of relevant researchers. Here we propose the discovery of Wenchang Formation in 19 residual sags in the central uplift belt of PRMB. The distribution and structural characteristics of the Wenchang Formation in these residual sags were determined using a three-step method. A comparative analysis was performed on the proven hydrocarbon-rich sags by source rock evaluation in non-well area. Results show that the residual sags have great potential for petroleum exploration. With boundary fault activity rate greater than 100 m/Ma, the subsiding rate is greater than 200 m/Ma. High amplitude and continuous low-frequency reflection in the seismic profile imply the development of deep/semi-deep lacustrine source rocks in the residual sags of Wenchang Formation. This study presents the first evidence that residual sags in the central uplift belt has great potential for petroleum exploration, which has strategic implications for expanding new fields of petroleum exploration in PRMB.

Key words: central uplift belt, residual sags, Wenchang Formation, deep/semi-deep lacustrine facies, exploration potential, Pearl River Mouth Basin

中图分类号:

TE122.14

郭刚, 吴景富, 吴克强, 于开平. 珠江口盆地隆起区残留洼陷地质特征与石油勘探新领域[J]. 石油学报, 2013, 34(增刊二): 39-47.

GUO Gang, WU Jingfu, WU Keqiang, YU Kaiping. Geological characteristics of residual sags and a new field of petroleum exploration in the uplift area of Pearl River Mouth Basin[J]. ACTA PETROLEI SINICA, 2013, 34(增刊二): 39-47.

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珠江口盆地隆起区残留洼陷地质特征与石油勘探新领域

Geological characteristics of residual sags and a new field of petroleum exploration in the uplift area of Pearl River Mouth Basin

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