Multi-parameters Quantitative Evaluation for Carbonate Reservoir Based on Geological Genesis

doi:10.11885/j.issn.1674-5086.2018.04.25.02

Abstract

Abstract: Carbonate reservoir in the study has various pore types, complex pore structure and strong heterogeneity, which cause obvious difference of single well productivity on the plane. Based on the analysis of capillary pressure curves, the reservoir can be divided into six flow zones by the flow zone index, and the high precision permeability interpretation model of each flow zone was established. Through the analysis of reservoir main controlling factors, selecting six parameters such as reservoir thickness, permeability heterogeneity coefficient, resistivity, porosity, shale content and paleogeomorphology, using the gray correlation analysis method to determine the weight of each evaluation parameter, and adopting the comprehensive evaluation index for quantitative classification of carbonate reservoir. The results show that the comprehensive evaluation result of single well is accordance with the actual productivity index. Further analysis shows that it is of high reliability by using the flow zone index method to interpret the permeability, adopting the gray correlation method to determine index weight, and applying the comprehensive evaluation index to evaluate the reservoir. This systematic method can be effective and efficient for guiding the reservoir research and well deployment, and providing a new thought for similar carbonate reservoir evaluation as well.

Key words: flow zone index, main controlling factors, gray correlation, quantitative evaluation, carbonate

CLC Number:

TE122

CHEN Peiyuan, WANG Zhibo, GUO Lina, WANG Long, QI Mingming. Multi-parameters Quantitative Evaluation for Carbonate Reservoir Based on Geological Genesis[J]. 西南石油大学学报(自然科学版), 2019, 41(4): 55-64.

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