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==Survey vs. drilling results==

==Survey vs. drilling results==

When compared with the subsequent drilling results, the soils overlying productive reservoirs contained microbial populations that were readily distinguishable from those of samples that were collected from nonproductive sites. The 39 wells subsequently drilled yielded three producers, three wells with uncommercial shows, and 33 dry holes. The microbial survey correctly predicted all 33 dry holes and identified the three producing wells and two of the three wells with uncommercial shows. The one show well that was not recognized tested 9 BO/D with a very low GOR.

When compared with the subsequent drilling results, the soils overlying productive reservoirs contained microbial populations that were readily distinguishable from those of samples that were collected from nonproductive sites. The 39 wells subsequently drilled yielded three producers, three wells with uncommercial shows, and 33 dry holes. The microbial survey correctly predicted all 33 dry holes and identified the three producing wells and two of the three wells with uncommercial shows. The one show well that was not recognized tested 9 BO/D with a very low GOR.

The figure below illustrates ten representative seismic prospects surveyed and later drilled. Each prospect displays good four-way dip closure on a Cretaceous horizon, and each is located in a productive basin. Only one was associated with a surface geochemical anomaly; it was the only one of the ten shown that resulted in a commercial discovery.

[[:file:surface-geochemical-exploration-for-petroleum_fig18-5.png|Figure 1]] illustrates ten representative seismic prospects surveyed and later drilled. Each prospect displays good four-way dip closure on a Cretaceous horizon, and each is located in a productive basin. Only one was associated with a surface geochemical anomaly; it was the only one of the ten shown that resulted in a commercial discovery.

 

==See also==

==See also==