Research on Optimization of Target Oil Wells for CO2 Huff and Puff in Yushulin Oil Well
CO2 huff and puff is one of the effective methods to develop the low permeability oil fields. But the optimization for target wells before conducting CO2 huff and puff is the key step, since it is directly related to the success or failure of CO2 huff and puff measures. The influence of various factors such as remaining oil saturation, water cut, reservoir thickness, permeability, porosity and flowing bottom hole pressure (FBHP)on the effect of CO2 huff and puff is analyzed firstly in this paper so as to establish an evaluation index. And then analytic hierarchy process (AHP) is used to determine a reasonable weight of single factor. And finally, two oil wells, Shu 11Y68-57 and Shu 11Y67-611, are optimized for CO2 huff and puff according to the fuzzy comprehensive evaluation method. The two wells optimized have a better effect of improving oil, which shows that the CO2 huff and puff technology is feasible and has a certain generalized value.
KeywordsAnalytic Hierarchy Process Membership Degree Judgment Matrix Bottom Hole Pressure Fuzzy Comprehensive Evaluation
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