Abstract
Fluid mobility is an important factor affecting the development of low permeability reservoirs. The fluid mobility of 4 core samples obtained from the Shahejie group of Dongying Sag(China) is conducted using the nuclear magnetic resonance analysis technique. The main part of NMR T2 spectrum usually has two form: unimodal and bimodal. When the main part of T2 spectrum is bimodal, water in large pores flows out firstly, while water in small pores can’t flow until the centrifugal force is large enough. When the main part of T2 spectrum is unimodal, the water in small pores is easier to flow out. The movable fluid percentage is mainly affected by the pore distribution, permeability and porosity.
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