Controlling factors of matrix acidizing potential of low permeability clastic reservoir in faulted lacustrine basin

E3S Web of Conferences

Xu Ningning¹  Li Bo²  Zhang Shoupeng²  Fang Zhengwei²  Wang Yongshi³ 

[1] Postdoctoral Scientific Research Station, Sinopec Shengli Oilfield Company;Research Institute of Petroleum Exploration and Development, Sinopec Shengli Oilfield Company;Sinopec Shengli Oilfield Company;

关键词: low permeability;    matrix acidization;    pore-throat structure;    bonan sag;    faulted lacustrine basin;    integration process of exploration and development;   

DOI  :  10.1051/e3sconf/202233801026

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown