Characteristics and hydrocarbon geological conditions of the Changchengian rifts in the southern North China Craton

doi:10.7623/syxb201805002

Acta Petrolei Sinica ›› 2018, Vol. 39 ›› Issue (5): 504-517.DOI: 10.7623/syxb201805002

• Petroleum Exploration • Previous Articles Next Articles

Characteristics and hydrocarbon geological conditions of the Changchengian rifts in the southern North China Craton

Wang Kun, Wang Tongshan, Wang Zecheng, Luo Ping, Li Qiufen, Fang Jie, Ma Kui

PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China

Received:2017-09-11 Revised:2018-03-04 Online:2018-05-25 Published:2018-06-06

华北克拉通南缘长城系裂谷特征与油气地质条件

王坤, 王铜山, 汪泽成, 罗平, 李秋芬, 方杰, 马奎

中国石油勘探开发研究院北京 100083

通讯作者: 王铜山,男,1976年7月生,2001年获石油大学(华东)学士学位,2007年获中国科学院广州地球化学研究所博士学位,现为中国石油勘探开发研究院高级工程师,主要从事深层油气成藏与勘探评价工作。Email:wts2007@petrochina.com.cn
作者简介:王坤,男,1985年1月生,2008年获中国矿业大学学士学位,2016年获中国石油勘探开发研究院博士学位,现为中国石油勘探开发研究院工程师,主要从事沉积与储集层研究。Email:wangk2016@petrochina.com.cn
基金资助:
国家重点研发计划项目（2016YFC0601002）和中国石油勘探开发研究院超前基础研究项目（2015yj-09）资助。

Abstract

Abstract:

The Meso-Neoproterozoic are wildly developed in North China Craton (NCC)with the distribution of Changchengian being the most extensive. Taking the Changchengian in the south NCC as study object, coupled with the isotopic chronological and petrological analyses, it suggests that the Xiong'er rift is a plume rift responding to the dispersion of Columbia supercontinent. Seismic data show that the Changchengian in southern part of Ordos Basin and Qinshui Basin covered by Phanerozoic strata respectively developed half graben-like rifts and garben rifts. Aeromagnetic data indicate that a rift system with strike of NE developed in the west to Xiong'er rift and the Qinshui Basin rift is the extension of the north branch of Xiong'er rift. The filling process of rifts can be divided into four stages. The early rift stage developed thick andesitic volcanic rocks; the later rift stage developed coarse clastic rocks; the sag stage developed relative fine clastic rocks; and epeiric sea stage developed carbonate rocks. Cuizhuang and Chenjiajian formations of sag stage developed dark argillaceous rocks and the black shale in Cuizhuang Formation is evaluated as effective source rock. Bitume was observed in the crack of dolostone of Luoyukou Formation. Longjiayuan Formation developed dissolved pores and large vugs. The argillaceous sandstone and muddy limestone of Lower Cambrian is the well cap rocks. These strata together with the underlying source rock in Cuizhuang Formation and reservoir in Luoyu Group, constitute the potential accumulation assemblage of Changchengian which could be still effective at present.

Key words: Ordos Basin, Changchengian, rift, development characteristic, filling sequence, accumulation assemblage

摘要：

华北克拉通广泛发育中—新元古界，其中又以长城系分布最为广泛。以华北克拉通南缘长城系为研究对象，通过同位素年代学及岩石学综合分析，认为熊耳裂谷为响应于Columbia超大陆裂解的地幔柱裂谷。地震资料显示被显生宇覆盖的鄂尔多斯盆地南部及沁水盆地均发育长城系裂谷，分别为大型箕状断陷型裂谷和地堑型裂谷。航磁资料揭示熊耳裂谷以西发育NE向裂谷，沁水盆地裂谷属于熊耳裂谷北支的延伸。长城系裂谷的充填过程可分为4个阶段：裂陷早期发育巨厚安山质火山岩，裂陷晚期发育大套粗碎屑沉积岩，坳陷期发育细粒沉积岩，陆表海期开始沉积碳酸盐岩。坳陷期崔庄组和陈家涧组发育暗色泥岩，其中崔庄组黑色页岩为有效烃源岩。洛峪口组白云岩裂缝中可见沥青充填，龙家园组见溶蚀孔及大型溶洞。中—下寒武统泥质砂岩、泥质灰岩可作为有效的盖层，与下伏崔庄组烃源岩、洛峪群储集层构成长城系潜在成藏组合，该组合现今仍可能有效。

关键词: 鄂尔多斯盆地, 长城系, 裂谷, 发育特征, 充填序列, 成藏组合

CLC Number:

TE121.1

Wang Kun, Wang Tongshan, Wang Zecheng, Luo Ping, Li Qiufen, Fang Jie, Ma Kui. Characteristics and hydrocarbon geological conditions of the Changchengian rifts in the southern North China Craton[J]. Acta Petrolei Sinica, 2018, 39(5): 504-517.

王坤, 王铜山, 汪泽成, 罗平, 李秋芬, 方杰, 马奎. 华北克拉通南缘长城系裂谷特征与油气地质条件[J]. 石油学报, 2018, 39(5): 504-517.

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Characteristics and hydrocarbon geological conditions of the Changchengian rifts in the southern North China Craton

华北克拉通南缘长城系裂谷特征与油气地质条件

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