Journal
PETROLEUM EXPLORATION AND DEVELOPMENT
Volume 40, Issue 1, Pages 61-68Publisher
KEAI PUBLISHING LTD
DOI: 10.1016/S1876-3804(13)60006-3
Keywords
Songliao Basin; shale; micro pore structure; micro fracture; reservoir
Funding
- Pilot Program of the National Key Basic Research and Development Program (973 Program), China [2011CB211701]
- National Natural Science Foundation of China [41172134]
- PetroChina Science and Technology Special Project [2011A-0203]
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To research the characteristics and petroleum geological significance of micro pores, this paper uses Second Electron Microscope (SEM) and secondary SEM imaging capability in Field Emission SEM (FE-SEM) to characterize shale from the first member of the Cretaceous Qingshankou Formation, Songliao Basin. There are five major pore types in the shale, including matrix intercrystal, organic, dissolution, interparticle, and intracrystalline pores. In addition, there are a mass of micro-fractures of micron-submicron (nano-) scale, including dissolution, filled and interlayer fractures. The existence of complex fracture-pore systems provides an effective pathway for primary migration and it also provides ample storage space for the residual petroleum in shale, which is important for the primary migration and storage for shale oil and gas resources.
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