| Issue |
E3S Web Conf.
Volume 338, 2022
7th International Conference on Environmental Science and Material Application (ESMA 2021)
|
|
|---|---|---|
| Article Number | 01026 | |
| Number of page(s) | 4 | |
| DOI | https://doi.org/10.1051/e3sconf/202233801026 | |
| Published online | 20 January 2022 | |
Controlling factors of matrix acidizing potential of low permeability clastic reservoir in faulted lacustrine basin
1 Postdoctoral Scientific Research Station, Sinopec Shengli Oilfield Company, Shandong Dongying 257000, China
2 Research Institute of Petroleum Exploration and Development, Sinopec Shengli Oilfield Company, Shandong Dongying, 257022, China
3 Sinopec Shengli Oilfield Company, Dongying 257000, Shandong, China
* Corresponding author: 418048012@qq.com
Based on constant rate mercury injection experiment, casting thin section identification, scanning electron microscope observation, clay mineral X-ray and rock specific surface area analysis, the controlling factors of matrix acidizing potential of low-permeability sandstone reservoir in fault depression lacustrine basin were determined from three aspects: pore filling, throat filling and pore-throat combination characteristics. It is concluded that provenance controls the plane partition of reservoir pore fillings. Burial depth controls the longitudinal zoning of key filling material in reservoir throat. The difference of rock structure in sedimentary facies - microfacies controlling zone leads to the change of pore-throat assemblage pattern. The matrix acidizing scheme of low permeability sandstone reservoir in fault depression basin can be formulated according to the law of “provenance zoning, buried depth zoning and being controlled by microfacies in zone”, and the implementation scheme of pre-acid, main acid and post-acid can be put forward respectively. This method can effectively promote the integration process of exploration and development of low permeability clastic reservoir in mature exploration area.
Key words: low permeability / matrix acidization / pore-throat structure / Bonan Sag / faulted lacustrine basin / integration process of exploration and development
© The Authors, published by EDP Sciences, 2022
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