Analysis of Major Occurrence Modes of Remaining Oil in
Karstic-fracture Reservoirs

doi:10. 3863/j. issn. 1674 – 5086. 2013. 04. 003

Abstract

Abstract:

The pseudo-particle simulation technology was first introduced to the study of karstic-fracture carbonate reservoirs.
The multiscale fracture-cave network conceptual model was designed，and the water flooding process of the model was recorded.
The research shows that when cave and well configuration is unreasonable，there is some residual oil in high local control point
in the cave. What’s more，residual oil also exists due to high conductivity fracture，which was not affected by water. They are
the two major forms of residual oil in karstic-fractured reservoir. According to the water change characteristics of multiscale
fracture-cave network conceptual model，the reservoir analysis subject was defined to well TK412 of S48 cell in the fourth block
of Tahe Oilfield. According to the three-dimensional geologic model，from the highest point down，well TK412 is estimated
to have 110 million tons of residual oil. According to the analysis，despite the more than 90% water ratio，there is still a large
amount of remaining oil with great development potential.

Key words: words：karstic-fractured reservoir, pseudo particle simulation, residual oil analyses, mode of occurrence, geological
model

Cheng Qian1, Li Xipeng2, Liu Zhongchun1, Hu Xiangyang1, Li Bo2，3. Analysis of Major Occurrence Modes of Remaining Oil in
Karstic-fracture Reservoirs[J]. 西南石油大学学报(自然科学版), DOI: 10. 3863/j. issn. 1674 – 5086. 2013. 04. 003.

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