Low-permeability reservoir types classification and reservoir sensitivity controlling factors: a case study of Paleogene in Bohai Sea

doi:10.7623/syxb201911004

Acta Petrolei Sinica ›› 2019, Vol. 40 ›› Issue (11): 1331-1345,1367.DOI: 10.7623/syxb201911004

• Petroleum Exploration • Previous Articles Next Articles

Low-permeability reservoir types classification and reservoir sensitivity controlling factors: a case study of Paleogene in Bohai Sea

Lu Huan¹, Wang Qingbin¹, Du Xiaofeng¹, Guo Longlong¹, Yan Ge¹, Wang Xiabin², Liu Junzhao¹

1. Tianjin Branch, CNOOC China Limited, Tianjin 300459, China;
2. CNOOC Research Institute Co., Ltd., Beijing 100028, China

Received:2019-02-08 Revised:2019-08-06 Online:2019-11-25 Published:2019-12-07

低渗透储层类型划分及储层敏感性主控因素——以渤海海域古近系为例

卢欢¹, 王清斌¹, 杜晓峰¹, 郭龙龙¹, 燕歌¹, 王夏斌², 刘军钊¹

1. 中海石油(中国)有限公司天津分公司天津 300459;
2. 中海油研究总院有限责任公司北京 100028

通讯作者: 卢欢,女,1988年2月生,2010年获长江大学学士学位,2013年获中国石油大学(北京)硕士学位,现为中海石油(中国)有限公司天津分公司渤海石油研究院工程师,主要从事储层地质研究工作。Email:luhuan@cnooc.com.cn
作者简介:卢欢,女,1988年2月生,2010年获长江大学学士学位,2013年获中国石油大学(北京)硕士学位,现为中海石油(中国)有限公司天津分公司渤海石油研究院工程师,主要从事储层地质研究工作。Email:luhuan@cnooc.com.cn
基金资助:
国家科技重大专项（2016ZX05024-003）和中海石油（中国）有限公司科技项目"中海油‘十三五’油气资源评价"（YXKY-2018-KT-01）资助。

Abstract

Abstract:

Through the identification of thin sections, SEM analysis, sensitivity experiment of reservoirs and other analytical methods, this paper subdivides the types of low-porosity and low-permeability reservoirs in Bohai Sea, conducts a detailed study on the reservoir sensitivity of various reservoir-developed intervals and the characteristics, content and distribution of the corresponding clay minerals, and analyzes the effects of different sedimentary conditions on reservoir sensitivity. The results show that the low-permeability reservoirs in Bohai Sea are classified into kaolinite-rich type, illite-rich type, chlorite-rich type and carbonate dense cementation type. By establishing the relation between the genesis of low-permeability reservoirs with reservoir sensitivity, it is proposed that reservoir sensitivity is mainly controlled by three factors:parent rock type, paleoclimate conditions and sedimentary microfacies. First, parent rock type has a decisive influence on the evolution of the Paleogene clastic reservoirs in the study area. There are three main types of parent rocks, i.e., clastic reservoirs with intermediate-basic volcanic rocks as parent rocks, pyroclastic-kaolinite type of clastic reservoirs with intermediate-acidic volcanic rocks as parent rocks, and illite type of clastic reservoirs with metamorphic rocks as parent rocks. Paleoclimatic conditions have a vital impact on reservoir sensitivity. Sedimentary microfacies have a direct influence on the differentiation of clay minerals is directly affected and an indirect influence on the late diagenesis.

Key words: Bohai Sea area, Paleogene, low-permeability reservoir, sensitivity, sedimentary condition

摘要：

利用岩石薄片鉴定、扫描电镜分析、储层敏感性实验等多种分析手段，对渤海海域低孔低渗储层的类型进行了详细划分，并对各类储层发育段的储层敏感性特征及其对应的黏土矿物特征、含量和分布规律进行了详细研究，分析了不同沉积条件对储层敏感性的影响。研究结果表明，渤海海域低渗透储层可划分为富高岭石型、富伊利石型、富绿泥石型、碳酸盐致密胶结型。通过将低渗透储层成因与储层敏感性建立关联，提出了储层敏感性主要受控于母岩类型、古气候条件、沉积微相3个因素：①母岩类型对研究区古近系碎屑岩储层演化起决定性影响。研究区主要具有3种类型的母岩：以中基性火山岩为母岩的碎屑岩储层、以中酸性火山岩为母岩的碎屑岩储层为火山碎屑—高岭石型、以变质岩为母岩的碎屑岩储层为伊利石型。②古气候条件对储层敏感性起到了重要影响。③沉积微相直接影响黏土矿物分异，沉积微相还间接影响后期成岩作用。

关键词: 渤海海域, 古近系, 低渗透储层, 敏感性, 沉积条件

CLC Number:

TE123

Lu Huan, Wang Qingbin, Du Xiaofeng, Guo Longlong, Yan Ge, Wang Xiabin, Liu Junzhao. Low-permeability reservoir types classification and reservoir sensitivity controlling factors: a case study of Paleogene in Bohai Sea[J]. Acta Petrolei Sinica, 2019, 40(11): 1331-1345,1367.

卢欢, 王清斌, 杜晓峰, 郭龙龙, 燕歌, 王夏斌, 刘军钊. 低渗透储层类型划分及储层敏感性主控因素——以渤海海域古近系为例[J]. 石油学报, 2019, 40(11): 1331-1345,1367.

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Low-permeability reservoir types classification and reservoir sensitivity controlling factors: a case study of Paleogene in Bohai Sea

低渗透储层类型划分及储层敏感性主控因素——以渤海海域古近系为例

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