| 摘要 |
Methods, systems, and apparatus, including computer programs encoded on computer storage media, for detecting gas seepage. One of the methods includes obtaining surface gas sensor measurements from each of a plurality of locations within a geographic area prior to shale-gas development; determining whether natural gas seepage is occurring and establishing a corresponding baseline threshold value; obtaining additional surface gas sensor measurements after shale-gas development; determining that the additional gas sensor measurements for one or more of the plurality of locations exceed the baseline threshold level; performing field analysis of the gas sensor measurements that were determined to exceed the specified threshold to determine gas provenance, wherein the analysis distinguishes between natural gas seepage and thermogenic leakage; and presenting data indicating a geographic extent of gas thermogenic leakage based on the analysis. |
