岩性油气藏 ›› 2025, Vol. 37 ›› Issue (6): 162–171.doi: 10.12108/yxyqc.20250615

• 地质勘探 • 上一篇    下一篇

渤海海域石臼坨凸起秦皇岛M-3区新近系明下段岩性油藏油气运聚特征

程焱, 张铜耀, 郝鹏, 杨江浩, 刘学睿, 张伟森, 何俊辉, 王波   

  1. 中海油能源发展股份有限公司 工程技术分公司, 天津 300452
  • 收稿日期:2025-02-17 修回日期:2025-04-10 出版日期:2025-11-01 发布日期:2025-11-07
  • 第一作者:程焱（1995—），男，硕士，工程师，主要从事石油实验地质方面的研究工作。地址：（300452）天津滨海新区中海油服产业园区东门中海油实验中心。Email：chengyan6@cnooc.com.cn。
  • 基金资助:
    中国海洋石油集团有限公司科研条件平台建设项目“生烃热模拟实验平台建设”（编号：CNOOC-KJ PT GCJS 2020-01）资助。

Hydrocarbon migration and accumulation characteristics of lithologic reservoirs in lower Minghuazhen Formation of Neogene in Qinhuangdao M-3 area, Shijiutuo uplift, Bohai Sea

CHENG Yan, ZHANG Tongyao, HAO Peng, YANG Jianghao, LIU Xuerui, ZHANG Weisen, HE Junhui, WANG Bo   

  1. Engineering Technology Branch of CNOOC Energy Development Co., Ltd, Tianjin 300452, China
  • Received:2025-02-17 Revised:2025-04-10 Online:2025-11-01 Published:2025-11-07

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摘要： 通过对渤中凹陷、秦南凹陷烃源岩进行地球化学特征对比分析，开展了石臼坨凸起新近系明下段中部岩性油藏的油源对比、油气运移路径分析，剖析了秦皇岛M-3油藏的原油运聚特征。研究结果表明：①秦南凹陷烃源岩具有高C19/C23三环萜烷、C20/C23三环萜烷、ETR及伽马蜡烷/αβ-藿烷值，渤中凹陷烃源岩具有较高的C35/C3422S升藿烷值和C27Dia/C27St值。②秦皇岛M-3石臼坨凸起中部原油具有高密度、高黏度、窄δ13C值分布范围及较轻饱和烃同位素特征，北部和东北部原油呈现低密度、低黏度及宽δ13C值分布范围特征。③石臼坨凸起原油族群可分为3类：Ⅰ类石臼坨凸起东部油藏原油，低C27Dia/C27St值、中等ETR值及低—中等C35/C3422S升藿烷值，油源主要为秦南凹陷沙三段；Ⅱ类石臼坨凸起北部、部分中部油藏原油，高C27Dia/C27St值、高C35/C3422S升藿烷值及中等伽马蜡烷/αβ-藿烷值，原油主要源自渤中凹陷沙河街组，混有秦南凹陷沙三段原油供给；Ⅲ类石臼坨凸起部分中部油藏原油，高C27Dia/C27St值、中—高伽马蜡烷/αβ-藿烷值及中等C35/C3422S升藿烷值，原油主要源自渤中凹陷沙三段、混有沙一段供给。④研究区原油4-MDBT/1-MDBT、2，4-DMDBT/1，4-DMDBT、4，6-DMDBT/1，4-DMDBT、（Pr + Ph）/C30Hop参数及QGF index值的规律性变化显示秦南凹陷源岩供烃的油气运移路径为东南向中部至西北方向，渤中凹陷源岩供烃的油气运移路径为东南向西北方向。

关键词: 岩性油气藏, 油源对比, 油气运移路径, 聚类分析, 秦南凹陷, 渤中凹陷, 明化镇组, 石臼坨凸起, 渤海湾盆地

Abstract: Through comparing and analyzing the geochemical characteristics of source rocks in Bozhong Sag and Qinnan Sag, the oil source correlation and hydrocarbon migration pathway of the middle part of lower Minghuazhen Formation in Neogene of Shijutuo uplift were studied, and the crude oil migration and accumulation characteristics of oil reservoir in Qinhuangdao M-3 area were analyzed. The results show that: (1) Source rocks in Qinnan Sag have high values of C19/C23 tricyclic terpane, C20/C23 tricyclic terpane, extended tricyclic terpane ratio (ETR) and gammacerane/αβ-hopane, while source rocks in Bozhong Sag have high values of C35/C34 22S homohopane and C27Dia/C27St.(2) Crude oil in the middle part of Shijutuo uplift in Qinhuangdao M-3 area exhibits characteristics of high density, high viscosity, narrow distribution range of δ13C value and relatively light saturated hydrocarbon isotopic, while crude oil in the northern and northeastern parts shows low density, low viscosity and wide distribution range of δ13C value.(3) Crude oil groups in Shijutuo uplift can be divided into three types: Type Ⅰ iscrude oil from the eastern oil reservoirs of Shijutuo uplift, with low values of C27Dia/C27St, medium ETR and low-medium values of C35/C34 22S homohopane, and the oil source is mainly from the Sha3 Member of Qinnan Sag. Type Ⅱ is crude oil from the northern and some middle parts of Shijutuo uplift, with high values of C27Dia/C27St, high values of C35/C34 22S homohopane and medium values of gammacerane/αβ-hopane, and the crude oil mainly comes from Shahejie Formation of Bozhong Sag, mixed with the crude oil from the Sha3 Member of Qin‐nan Sag. Type Ⅲ is crude oil from some middle parts of Shijutuo uplift, with high values of C27Dia/C27St, medium-high values of gammacerane/αβ-hopane and medium values of C35/C34 22S homohopane, and the crude oil mainly comes from the Sha3 Member of Bozhong Sag, mixed with the crude oil from the Sha1 Member.(4) The regular changes of parameters of 4-MDBT/1-MDBT, 2, 4-DMDBT/1, 4-DMDBT, 4, 6-DMDBT/1, 4-DMDBT, (Pr+Ph)/C30Hop and QGF index values of crude oil in the study area indicate that the oil and gas migration pathway of source rocks in Qinnan Sag is from southeast to the middle and then to the northwest, while the oil and gas migration pathway of source rocks in Bozhong Sag is from southeast to northwest.

Key words: lithologic reservoirs, oil source correlation, hydrocarbon migration pathway, cluster analysis, Qinnan Sag, Bozhong Sag, Minghuazhen Formation, Shijiutuo uplift, Bohai Bay Basin

中图分类号: 

  • TE122.1
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