Quantitative Evaluation of Water-Flooded Zone Using Magnetic Resonance Measurements for Mud Logging (MR-ML) Technology

Abstract

Abstract:

Water production rate is a key parameter for classifying flooding level in water-flooded zone. How to calculate water production rate from water saturation index is a main problem in evaluating water-flooded zone. In this work, rocks with different water production rate were first produced with the water-injection preperation commonly used for evaluating oil/water relative permeability, and then analyzed by steadystate magnetic resonance measurements for mud logging (MR-ML) spectroscopy. Based on the response characterisics of the rocks, an empirical formula to calculate water production rate from the water saturation index was proposed, which takes advantage of the oil production test data and oil/water relative permeability curve from sealed core analysis. The feasibility of using the water production rate derived to evaluate flooding level was investigated. The results from practical applications showed that MR-ML spectroscopy can be used for rapid identification of water flooded layer, classifying water flooding level, with high accuracy.

Key words: magnetic resonance mud logging, water flooded zone, water production rate, watered out grade, water saturation

CLC Number:

TE122.2

XU Xiao-Qiong, WANG Zhi-Zhan,CI Xing-Hua. Quantitative Evaluation of Water-Flooded Zone Using Magnetic Resonance Measurements for Mud Logging (MR-ML) Technology[J]. Chinese Journal of Magnetic Resonance, 2012, 29(2): 209-215.

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