特低渗储层不同孔隙组合类型的微观孔隙结构及渗流特征——以甘谷驿油田唐157井区长6储层为例

doi:10.3969/j.issn.1673-8926.2017.06.002

岩性油气藏 ›› 2017, Vol. 29 ›› Issue (6): 8–14.doi: 10.3969/j.issn.1673-8926.2017.06.002

特低渗储层不同孔隙组合类型的微观孔隙结构及渗流特征——以甘谷驿油田唐157井区长6储层为例

赵习森, 党海龙, 庞振宇, 时丕同, 曹尚, 丁磊, 白璞

陕西延长石油(集团)有限责任公司研究院, 西安 710075

收稿日期:2017-06-28 修回日期:2017-08-10 出版日期:2017-11-21 发布日期:2017-11-21
第一作者:赵习森(1964-),男,博士,教授级高级工程师,主要从事石油勘探开发方面的研究工作。地址:(710075)陕西省西安市科技二路75号延长石油研究院。Email:zxs123450@163.com
通信作者: 庞振宇(1984-),男,博士,工程师,主要从事石油勘探开发方面的研究工作。Email:pangzhenyu0624@163.com
基金资助:
陕西省科技统筹创新工程计划项目"陕北致密砂岩油藏CO₂驱提高采收率关键技术研究及先导试验"（编号：2014KTZB03-02）和国家科技支撑计划课题"CO₂埋存与提高采收率技术"（编号：2012BAC26B03）联合资助

Microscopic pore structure and seepage characteristics of different pore assemblage types in ultra low permeability reservoir:a case of Chang 6 reservoir in Tang 157 well area,Ganguyi Oilfield

ZHAO Xisen, DANG Hailong, PANG Zhenyu, SHI Pitong, CAO Shang, DING Lei, BAI Pu

Research Institute, Shaanxi Yanchang Petroleum(Group) Co., Ltd., Xi'an 710075, China

Received:2017-06-28 Revised:2017-08-10 Online:2017-11-21 Published:2017-11-21

摘要/Abstract

摘要： 为了有效克服特低渗储层非均质性对注水开发效果的影响，首次从孔隙组合类型的角度出发，与高压压汞、恒速压汞、核磁共振和真实砂岩水驱油等实验相结合，从宏观和微观两方面对注水开发储层特征进行精细定量表征：标定了不同孔隙组合类型的主流喉道半径和可动流体饱和度的大小，明确了不同孔隙组合类型的驱替类型及残余油的赋存状态。结果表明：溶孔-粒间孔、粒间孔型储层具有物性好，压实率、胶结率均较低和含油饱和度较高的特征，多发育（水下）分流河道中。其可动流体饱和度最高，易形成优势通道。优势通道的主流喉道半径为0.963~1.494 μm，驱替类型以指状驱替为主，为主要剩余油富集区；粒间孔-溶孔型和溶孔-微孔、微孔型储层特征依次变差，主流喉道半径分别为0.432~1.071 μm和0.364~0.411 μm，驱替类型，逐渐过渡到指状-网状、网状驱替，直至驱不动。

关键词: 火山岩储层, 主控因素, 石炭系, 西泉地区, 准噶尔盆地

Abstract: Aiming to overcome reservoir heterogeneity influence in water injection development,it is the first that high mercury injection,constant mercury injection,nuclear magnetic resonance have been applied to make an accurate quantification of reservoir characteristics in the stage of water injection from the angle of pore combination. In this paper main current throat radius and moveable fluid saturation have been defined for the sake of understanding the features of water flooding and residual oil for different pore assembly types. Dissolved/intergranular pores developing in the favorable sedimentary faces of the lowest compaction and cementation make its reservoir have the highest value of porosity,permeability,oil saturation and moveable fluid saturation,which makes the apparent apartment of oil and is the easiest to form preponderant permeable paths of 0.963-1.494 μm main current throat radius and fingering flooding results in residual oil of large area. Secondly by the sequence of intergranular-dissolved,dissolved-micro and micro pores,main current throat radius range is respectively 0.432-1.071 μm, 0.364-0.411 μm and its flooding type changes from finger-net, net to immovable flooding.

Key words: volcanic reservoirs, controlling factors, Carboniferous, Xiquan area, Junggar Basin

中图分类号:

TE122.2+3

赵习森, 党海龙, 庞振宇, 时丕同, 曹尚, 丁磊, 白璞. 特低渗储层不同孔隙组合类型的微观孔隙结构及渗流特征——以甘谷驿油田唐157井区长6储层为例[J]. 岩性油气藏, 2017, 29(6): 8–14.

ZHAO Xisen, DANG Hailong, PANG Zhenyu, SHI Pitong, CAO Shang, DING Lei, BAI Pu. Microscopic pore structure and seepage characteristics of different pore assemblage types in ultra low permeability reservoir:a case of Chang 6 reservoir in Tang 157 well area,Ganguyi Oilfield[J]. Lithologic Reservoirs, 2017, 29(6): 8–14.

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特低渗储层不同孔隙组合类型的微观孔隙结构及渗流特征——以甘谷驿油田唐157井区长6储层为例

Microscopic pore structure and seepage characteristics of different pore assemblage types in ultra low permeability reservoir:a case of Chang 6 reservoir in Tang 157 well area,Ganguyi Oilfield

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