发明名称 |
Estimating adsorbed gas volume from NMR and dielectric logs |
摘要 |
<p>Adsorbed gas in a formation may be estimated. Nuclear magnetic resonance (NMR) data for a subsurface geological formation is obtained, and at least a portion of the NMR data is corrected to produce corrected NMR data. A NMR-based estimate of formation porosity is determined using the corrected NMR data. Dielectric permittivity data for the subsurface geological formation is obtained, and a dielectric permittivity-based estimate of the formation water-filled porosity is determined using the dielectric permittivity data. A gas volume is determined using the determined NMR-based estimate of the formation porosity and the determined dielectric permittivity-based estimate of the formation water-filled porosity. The gas volume may be determined by subtracting the determined dielectric permittivity-based estimate of the formation water-filled porosity from the determined NMR-based estimate of the formation porosity. The gas volume per unit volume of the formation may be determined using an equation of state.</p> |
申请公布号 |
GB2524702(A) |
申请公布日期 |
2015.09.30 |
申请号 |
GB20150013763 |
申请日期 |
2014.02.13 |
申请人 |
SCHLUMBERGER HOLDINGS LIMITED |
发明人 |
ASHISH DATEY;TIMOTHY ANDREW JOHN HOPPER;LALITHA VENKATARAMANAN |
分类号 |
G01V3/32 |
主分类号 |
G01V3/32 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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