Technology of High Resolution CT Study on the Application of Pore Structure Research in Tight Oil Reservoir

DOI

10.2991/icseee-15.2016.214How to use a DOI?

Keywords

3D CT; Fengnan Area in Junggar basin; tight oil reservoir; the microscopic pore structure

Abstract

Combined with the scanning electron microscopy (sem), mercury injection test and other microscopic experiment technology, technology of high-resolution 3D reservoir characterization based on the CT imaging was used to sduty the microscopic pore structure of tight oil reservoir in Fengnan Area, sourtheast of junggar basin. From macroscopic to microcosmic, in accordance with the principle of 2D to 3D, the experiments went on one by one, aiming to optimize the experiment sample. Some samples with a diameter of 65 μm was derived and scanned by high-resolution Nano-CT, then a three-dimensional texture model of nano-scale pores was established and then the porosity datas of samples in different depth could be obtained and analysized .A clear understanding of the size, shape, spatial distribution and connectivity of the pore throat could be got as well. Experimental analysis shows that, on a micrometer scale, the size of experimental sample pore throat varies violently, and their radius range from 2 to 50 μm, distributed in or between grains isolatedly or in a shape of a band. The pore throats are fewer but account for a large pore volume. On a nanometer scale, the radius of pores mainly range from 0.05 to 0.3 μm, and the quantity of nanoscale pores increases. The pore throats are arranged in the shape of tube and ball inside or on the surface of mineral particles (crystals). The ball-shaped micropores in nanoscale, often isolate in the 3D space, show the poor connectivity and consequently act as the reservoir space. The porosities calculated using the Nano CT are close to the results analysized by core samples.

Copyright

© 2016, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Le Sun
AU  - Zhizhang Wang
AU  - Xinghe Yu
AU  - Haiyang Ma
PY  - 2016/04
DA  - 2016/04
TI  - Technology of High Resolution CT Study on the Application of Pore Structure Research in Tight Oil Reservoir
BT  - Proceedings of the 2015 4th International Conference on Sustainable Energy and Environmental Engineering
PB  - Atlantis Press
SP  - 1208
EP  - 1218
SN  - 2352-5401
UR  - https://doi.org/10.2991/icseee-15.2016.214
DO  - 10.2991/icseee-15.2016.214
ID  - Sun2016/04
ER  -