阿南凹陷腾格尔组凝灰质混积岩岩相及储集空间特征

doi:10.3969/j.issn.1673-8926.2017.02.009

岩性油气藏 ›› 2017, Vol. 29 ›› Issue (2): 68–76.doi: 10.3969/j.issn.1673-8926.2017.02.009

阿南凹陷腾格尔组凝灰质混积岩岩相及储集空间特征

魏巍^1,2, 朱筱敏^1,2, 朱世发^1,2, 何明薇^1,2, 吴健平³, 王名巍³

1. 中国石油大学(北京)地球科学学院, 北京 102249;
2. 中国石油大学(北京)油气资源与探测国家重点实验室, 北京 102249;
3. 中国石油华北油田分公司勘探开发研究院, 河北任丘 062552

收稿日期:2016-11-18 修回日期:2016-12-18 出版日期:2017-03-21 发布日期:2017-03-21
通讯作者: 朱筱敏(1960-),男,教授,博士生导师,主要从事沉积储层和层序地层学方面的教学和科研工作。Email:xmzhu@cup.edu.cn。
作者简介:魏巍(1988-),女,中国石油大学(北京)在读博士研究生,研究方向为储层沉积和成岩研究。地址:(102249)北京市昌平区府学路18号中国石油大学(北京)地球科学学院。Email:hunqiu8854@gmail.com
基金资助:
国家重大科技专项“岩性地层油气藏成藏规律、关键技术及目标评价”（编号：2011ZX05001-002）和中国石油华北油田分公司项目“二连盆地特殊岩类储集层特征及其成因机制研究“（编号：HBYT-YJY-2014-JS-307）联合资助

Lithofacies and reservoir space characteristics of the tuffaceoussiliciclastic mixed rocks of the Lower Cretaceous Tenggeer Formation in Anan Sag, Erlian Basin

WEIWei^1,2, ZHU Xiaomin^1,2, ZHU Shifa^1,2, HE Mingwei^1,2, WU Jianping³, WANG Mingwei³

1. College of Geosciences, China University of Petroleum, Beijing 102249, China;
2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;
3. Research Institute of Exploration and Development, PetroChina Huabei Oilfield Company, Renqiu 062552, Hebei, China

Received:2016-11-18 Revised:2016-12-18 Online:2017-03-21 Published:2017-03-21

摘要/Abstract

摘要： 二连盆地阿南凹陷下白垩统发育一套湖相致密油凝灰质混积岩岩性段，是近年来重要的勘探领域。通过岩心精细描述、薄片鉴定、扫描电镜及X 射线衍射分析等技术，对这套混积岩岩性段的岩性、岩相和储集空间特征进行了综合研究。该套混积岩岩性主要为灰绿色—灰色凝灰质岩，包括凝灰岩、沉凝灰岩、凝灰质砂岩和凝灰质泥岩，其中沉凝灰岩和凝灰质泥岩发育最为广泛；其岩相可划分为块状凝灰岩、块状沉凝灰岩、变形构造沉凝灰岩、块状凝灰质砂岩、波状层理凝灰质砂岩、块状凝灰质泥岩及水平层理凝灰质泥岩。块状凝灰岩岩相储集性能最好，储集空间为脱玻化孔，属于低—中孔、超低渗储层；变形构造沉凝灰岩岩相储集性能较好，以溶蚀孔和基质孔为主，属于特低孔、低—超低渗储层；块状沉凝灰岩岩相、块状凝灰质砂岩岩相和波状层理凝灰质砂岩岩相储集性能均较差，主要发育晶屑溶蚀孔和晶间孔，属于特低孔、超低渗储层。

Abstract: The Lower Cretaceous Tenggeer Formation developed a set of lacustrine tight oil tuffaceous-siliciclastic mixed rocks in Anan Sag of Erlian Basin, which has become an important exploration target. Based on the data of core observation, thin section, scanning electron microscope, and X-ray diffraction, the lithologies, lithofacies and reservoir spaces of the mixed rocks were studied. This set of mixed rocks are mainly grey-green to grey tuffaceous rocks, including tuff, tuffite, tuffaceous sandstone and tuffaceous mudstone. The tuffite and tuffaceous mudstone are widely developed. There are six types of lithofacies:massive tuff, massive tuffite, deformed tuffite, massive tuffaceous sandstone, wavy-bedding tuffaceous sandstone, massive tuffaceous mudstone and horizonalbedding tuffaceous mudstone. The massive tuff lithofacies is characterized by middle to low porosity and ultralow permeability reservoir. It is the best reservoir in the mixed rocks,and its main reservoir space is devitrified pores. The deformed tuffite lithofacies is chaterized by extremely low porosity and low to ultra-low permeability reservoir, with good reservoir properties and the main reservoir space of dissolved pores and marix pores. The massive tuffite lithofacies, massive tuffaceous sandstone lithofacies and wavy-bedding tuffaceous sandstone lithofacies are characterized by extremely low porosity and ultra-low permeability reservoir. It is poor reservoir, and its main reservoir spaces are crystal fragments dissolved pores and crystal intergranular pores.

中图分类号:

TE122.2

魏巍, 朱筱敏, 朱世发, 何明薇, 吴健平, 王名巍. 阿南凹陷腾格尔组凝灰质混积岩岩相及储集空间特征[J]. 岩性油气藏, 2017, 29(2): 68–76.

WEIWei, ZHU Xiaomin, ZHU Shifa, HE Mingwei, WU Jianping, WANG Mingwei. Lithofacies and reservoir space characteristics of the tuffaceoussiliciclastic mixed rocks of the Lower Cretaceous Tenggeer Formation in Anan Sag, Erlian Basin[J]. Lithologic Reservoirs, 2017, 29(2): 68–76.

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阿南凹陷腾格尔组凝灰质混积岩岩相及储集空间特征

Lithofacies and reservoir space characteristics of the tuffaceoussiliciclastic mixed rocks of the Lower Cretaceous Tenggeer Formation in Anan Sag, Erlian Basin

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