Production performance patterns and forecasting methods of gas well in volcanic gas reservoirs

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  • 1.PetroChina,Beijing 100007,China;2.Research Institute of Petroleum Exploration
    & Development,Beijing 100083,China;
    3.China Petroleum Technology & Development Corporation,Beijing 100028,China

Received date: 2016-03-02

  Revised date: 2016-06-06

  Online published: 2019-09-09

Abstract

Different from conventional sedimentary reservoirs,the storage space in volcanic gas reservoirs,with different-sized pore-fracture array modes,is quite complicated.The existence of stress-sensitivity effect,slippage effect,and relay gas supply mechanism leads to complex nonlinear percolation mechanism,with the influence of which,the dynamic production performance pattern of volcanic gas wells is quite different from that of the conventional gas wells.Based on characters of multi-size and multi-medium,and combining the dynamic production data from several volcanic gas wells,the study divides the well production performance into 3 phases:The initial high-production period,production-declining period,and low but stable production period.Numerical simulation of Eclipse,the history matching result of which perfectly fits the actual production curve,verifies the rationality of the “3-phase” theory.A production performance prediction method is built with slippage effect and stress sensitivity effect taken into consideration.On the basis of the research results,productivity of 12 wells are predicted,and 10 of them are in accordance with the actual situation.This study has great significance in volcanic gas wells production prediction and proration.

Cite this article

Ren Dong, Dong Jia-xin, Wang Zhi-ping, Shi Wen . Production performance patterns and forecasting methods of gas well in volcanic gas reservoirs[J]. Natural Gas Geoscience, 2016 , 27(11) : 2037 -2042 . DOI: 10.11764/j.issn.1672-1926.2016.11.2037

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