Changes

  | isbn    = 0-89181-602-X

  | isbn    = 0-89181-602-X

}}

}}

In this case history, the client conducted a [[Surficial geochemistry and hydrocarbon detection methods|soil gas hydrocarbon survey]] along the [[trace]] of the [[seismic line]] to look for evidence of hydrocarbon [[Macroseepage vs. microseepage in surficial geochemistry|microseepage]] from a seismically defined trap at [[commom depth point (CDP)]] 1070 ([[:file:surface-geochemical-exploration-for-petroleum_fig18-6.png|Figure 1]]). Propane soil gas anomalies were detected at CDP 1070 and 1096. The [[wildcat]] well drilled at CDP 1070 resulted in a new field discovery. The geochemical lead at CDP 1096 was reevaluated seismically. After additional [[Seismic processing basics|processing]], a revised interpretation (right) also predicted [[porosity]] development there and coincident with the surface geochemical anomaly. A second productive well was drilled at CDP 1096.

In this case history, the client conducted a [[Surficial geochemistry and hydrocarbon detection methods|soil gas hydrocarbon survey]] along the [[trace]] of the [[seismic line]] to look for evidence of hydrocarbon [[Macroseepage vs. microseepage in surficial geochemistry|microseepage]] from a seismically defined trap at [[commom depth point (CDP)]] 1070 ([[:file:surface-geochemical-exploration-for-petroleum_fig18-6.png|Figure 1]]). [[Surficial geochemistry and hydrocarbon detection methods#Detection of light hydrocarbons|Propane soil gas]] anomalies were detected at CDP 1070 and 1096. The [[wildcat]] well drilled at CDP 1070 resulted in a new field discovery. The geochemical lead at CDP 1096 was reevaluated seismically. After additional [[Seismic processing basics|processing]], a revised interpretation (right) also predicted [[porosity]] development there and coincident with the surface geochemical anomaly. A second productive well was drilled at CDP 1096.

[[file:surface-geochemical-exploration-for-petroleum_fig18-6.png|300px|thumb|{{figure number|1}}seismic section and soil gas profile of a stratigraphic trap located at approximately 5,600 ft (1.5 sec) in the Cretaceous Escondido Sandstone in La Salle County, Texas. Modified. Copyright: Rice, 1989<ref name=Rice_1989>Rice, G., 1989, Exploration Enhancement by integrating near-surface geochemical and seismic methods: Oil & Gas Journal, v. 87, no. 14 (April 3), p. 66-71.</ref>; courtesy Oil & Gas Journal.]]

[[file:surface-geochemical-exploration-for-petroleum_fig18-6.png|300px|thumb|{{figure number|1}}seismic section and soil gas profile of a [[stratigraphic trap]] located at approximately 5,600 ft (1.5 sec) in the [[Cretaceous]] Escondido Sandstone in La Salle County, Texas. Modified. Copyright: Rice, 1989<ref name=Rice_1989>Rice, G., 1989, Exploration Enhancement by integrating near-surface geochemical and seismic methods: Oil & Gas Journal, v. 87, no. 14 (April 3), p. 66-71.</ref>; courtesy Oil & Gas Journal.]]