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渤南洼陷沙三下亚段泥页岩储集空间研究:以罗69
井为例
邓美寅1, 梁 超2
1.胜利地质录井公司,山东东营257064
2.中国地质大学(北京)能源学院,北京100083
Deng Meiyin1, Liang Chao2
1.Shengli Geologging Company,Dongying257064,China
2.School of Energy Resources,China University of Geosciences (Beijing),Beijing100083,China
Deng Meiyin,Liang Chao.Studies on reservoir space of mud stone and shale of the lower section of Es3in Bonan Subsag:An example
from Well Luo 69.Earth Science Frontiers,2012,19(1):173-181
Abstract:Mud stone and shale from the Lower Section of Es3in Bonan Subsag,Jiyang Depression is characterized
by great thickness and wide distribution.It mainly develops dark gray mudstone,lime mudstone,oil mudstone,
argillaceous limestone,and yellow brown and taupe oil shale.The mud stone and shale has high content
of organic carbon(up to 9.0%)and great hydrocarbon generation potential(up to 82.6mg/g)as well as high
maturity(up to 3.0%),which made it as good source rocks and also a favorable accumulation area for shale oil
and gas.To study the reservoir space of mud stone and shale of the lower section of Es3,methods such as core
observation,polarizing microscope,scanning electron microscope and so on were applied.The cracks of shale
reservoir space include structural cracks,micro-cracks between layers,overpressure breaking cracks.The pore
space is mainly micro-pores,including pyrite intergranular pores,intergranular pores of clay minerals.Overall,
reservoir space is dominated by tension fracture micro-cracks between layers,intergranular pores of clay
minerals,intergranular pores of calcite.Through the comparison of reservoir space types and characteristics of
different rocks,the lamellar argillaceous limestone in Lower No.12and Upper No.13layers of Es3is the best
reservoir lithofacies style.
Key words:Bonan Subsag;mud stone and shale;micro-cracks;micro-pores;shale oil and gas
摘 要:济阳坳陷渤南洼陷沙三下亚段泥页岩厚度大、分布广,主要发育了深灰色泥岩、灰质泥岩、油泥岩、
泥质灰岩和黄褐色—灰褐色油页岩。泥页岩的有机碳含量高,最高可达9.0%;生烃潜量高,最高可达
82.6mg/g;演化程度高,最高可达3.0%;该区泥页岩既是良好的烃源岩,也是页岩油气赋存的有利场所。
为研究该区沙三下亚段页岩油气储集空间,文中通过岩心观察、偏光显微镜、扫描电镜等手段,认为研究区
泥页岩储集空间中裂缝包括构造裂缝、层间微裂缝、超压破裂缝;空隙主要为微孔隙,包括黄铁矿晶间孔、
粘土矿物晶间孔、方解石晶间孔。总体上来讲,储集空间以构造张裂缝、层间微裂缝、粘土矿物晶间孔及方
解石晶间孔为主导。通过对比不同岩相间储集空间的类型与特征,认为沙三下12下、13上砂组纹层状泥
质灰岩为储集性能最好的岩相。
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