Lithologic Reservoirs >

2012 , Vol. 24 >Issue 2: 83 - 86

DOI: https://doi.org/10.3969/j.issn.1673-8926.2012.02.016

Derivation of new material balance equation for adsorbed gas reservoir and reserve estimation

  • LI Changzheng ,
  • SUN Wei ,
  • REN Dazhong ,
  • ZHOU Shuxun ,
  • WANG Xiujuan
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  • 1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation， Southwest Petroleum University， Chengdu 610500， China； 2. PetroChina Changqing Oilfield Company， Xi’an 710020， China； 3. Research Institute of Drilling and Recovery Technology， PetroChina Chuanqing Drilling Engineering Company Ltd.， Xi’an 710020， China； 4. Research Institute of Geophysical Prospecting, Sinopec， Nanjing 210014， China； 5. Exploitation Enterprise Department， PetroChina Tarim Oilfield Company， Korla 841000， China

Online published: 2012-04-20

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Abstract

During the exploitation process of unconventional adsorbed gas reservoirs, as formation pressure decreases, adsorbed gas will be desorbed and make adsorbed layer decrease and free gas space increase. At present, the material balance equation considering adsorbed layer volume variation has not been established and has not been applied to research the influence of adsorbed layer volume variation and density on adsorbed gas reservoir reserves. This paper firstly established newmaterial balance equation considering the adsorbed layer volume variation. The application cases proved the applicability and reliability of this equation, and it is cognized that adsorbed layer volume variation and density have greater influence on natural gas reserves estimation.

Key words： pore structure; nuclear magnetic resonance; constant speed mercury injection; Chang 81 reservoir; Huaqing area; Ordos Basin

Cite this article

LI Changzheng , SUN Wei , REN Dazhong , ZHOU Shuxun , WANG Xiujuan . Derivation of new material balance equation for adsorbed gas reservoir and reserve estimation[J]. Lithologic Reservoirs, 2012 , 24(2) : 83 -86 . DOI: 10.3969/j.issn.1673-8926.2012.02.016

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