Prediction methods of the OGIP for the single well in volcanic gas reservoirs

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  • 1.PetroChina Company Ltd.,Beijing 100007,China;
    2.Research Institute of Petroleum Exploration & Development,PetroChina,Beijing 100083,China

Received date: 2015-06-09

  Revised date: 2015-08-14

  Online published: 2019-09-19

Abstract

Different from conventional sedimentary reservoirs,the storage space in volcanic gas reservoirs,with different-sized pore-fracture array modes,is quite complicated.This leads to the variations of OGIP in volcanic gas wells,and the variations are as follows: for low-permeability reservoirs,the OGIP tends to increase with the extension of production time,due to the increasing drainage radius;for the dual-media reservoirs,the OGIP also increases with the extension of production time,but itis mainly caused by the effect of relay gas supply mechanism;meanwhile,fracturing can increase the gas well supply area,and thus increase the OGIP.According to the variation rules,OGIP prediction methods for different-types reservoirs are established.For the low-permeability reservoirs and the fractured reservoirs,the prediction methods are based on the prediction of the max drainage radius;while for the dual-media reservoirs,the OGIP predictions are built on a typical curve chart.The new methods are applied to actual production data calculation.The results show that the new methods are more precise in predicting OGIP when the gas well production time is relatively short.

Cite this article

Ren Dong, Dong Jia-xin, Wang Zhi-ping, Wang Shao-jun, Xu Meng-ya . Prediction methods of the OGIP for the single well in volcanic gas reservoirs[J]. Natural Gas Geoscience, 2016 , 27(6) : 1110 -1115 . DOI: 10.11764/j.issn.1672-1926.2016.06.1110

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