Experiment and application of rock electrical experiment with different gas components under high temperature and high pressure condition
Received date: 2016-12-30
Revised date: 2017-02-27
Online published: 2017-04-10
Due to the fact that the influence of CO2 and CH4 mixed gas on the rock electrical parameters is not clear,calculation accuracy of water saturation is low.Through the simulation of reservoir conditions rock electric experiment,respectively with different content of CO2 and CH4 mixed gas coreflood,with determination of theb,n and m values,the effects have been analyzed of mixture of CO2 and CH4 on the electrical properties of rock.Different CO2 content of mixed gas dissolved in the formation water,the a and m values basically have no difference;with the increase of CO2 content,b value increases, n value decreases.A prediction model was established to the b and n values variance with the content of CO2.The water saturation calculated by this method is in good agreement with the core analysis results,and the reliability of the method is confirmed.
He Sheng-lin，Zhang Hai-rong，Yang Dong，Wu Yi-xiong，Wu Jin-Bo . Experiment and application of rock electrical experiment with different gas components under high temperature and high pressure condition[J]. Natural Gas Geoscience, 2017 , 28(4) : 575 -581 . DOI: 10.11764/j.issn.1672-1926.2017.02.009
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