A new method to calculate shale gas geological reserves

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  • School of Petroleum Engineering,China University of Petroleum (East China),Qingdao 266580,China

Received date: 2015-08-05

  Revised date: 2015-10-02

  Online published: 2019-09-20

Abstract

Shale gas is an important unconventional energy,which has a good development prospect due to its rich resources.Shale gas mainly consists of free gas and adsorbed gas.Adsorbed gas reserves can be calculated by Langmuir isothermal adsorption curve,and free gas reserves can be calculated by volume method.However,the pore volume occupied by the adsorbed gas is always ignored in the process of free gas reserves calculation,thus the result of free gas reserves is often larger than its actual value.First,this paper provided a method of linear regression to determine Langmuir Volume and Langmuir pressure;then by introducing the mean free path of molecules,we calculated the volume of single molecules volume in adsorbed phase and got the total volume of adsorbed gas,ultimately derived the free gas reserves removing adsorbed phase volume.In addition,by comparing with Ray J.Ambrose’s method using actual data,reliability of the new method was verified.Finally,this paper analyzed the impact of matrix absorption capacity,formation temperature and pressure on the calculation of reserves.

Cite this article

Jiang Rui-zhong, Qiao Xin, He Ji-xiang, Gao Yi-hua, Teng Wen-chao, Li Yuan, Fan Hai-jun . A new method to calculate shale gas geological reserves[J]. Natural Gas Geoscience, 2016 , 27(4) : 699 -705 . DOI: 10.11764/j.issn.1672-1926.2016.04.0699

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