Abstract
Based on the analysis of the rock characteristics, pore types, pore structure characteristics, and physical characteristics of the reservoir of the Carboniferous sand-mudstone section, it is considered that the rock types of the sand-mudstone section are mainly composed of lithic sandstone and partly of feldspar lithic sandstone; the reservoir pore types are primarily intergranular dissolution pore and intergranular pores, secondarily dissolution pores inside the cements and intragranular dissolution pores, and also a small amount of kaolinite and calcite intergranular micropores, while a small amount of grain boundary fractures and micro fractures is developed; the overall physical properties of the reservoir are inferior and the average porosity of are mostly below 10 % while there are differences; porosity and permeability are basically exponential positively correlated, with the correlation coefficient being 0.78; highly efficient reservoirs mainly develop in the residual primary intergranular pores and intergranular dissolution pores. By combining the diagenesis features of the reservoir, it is concluded that the compaction and pressure solution, cementation, and dissolution affect the reservoir development of the sand-mudstone section in the research area, with dissolution playing a constructive role in porosity development of the reservoir.
The Foundation of State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing (No. PRP/open-1303).
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Zhao, X., Fang, J., Deng, J., Yin, T. (2015). Reservoir Features of Carboniferous Sand-Mudstone Member and Effects of Diagenesis in Lunnan Region. In: Dong, F. (eds) Proceedings of the 11th International Congress for Applied Mineralogy (ICAM). Springer Geochemistry/Mineralogy. Springer, Cham. https://doi.org/10.1007/978-3-319-13948-7_48
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DOI: https://doi.org/10.1007/978-3-319-13948-7_48
Publisher Name: Springer, Cham
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