About This Item

Share This Item

The AAPG/Datapages Combined Publications Database

South Texas Geological Society Special Publications


Contributions to the Geology of South Texas, 1986
Pages 341-351

A Mappable Parameter for Predicting Gas Production in South Texas Sandstones: A Study of Owen (Olmos) Field, Webb County, Texas

Alvin L. Schultz


Careful selection of development well locations is essential for various economic reasons. Many of the sandstone reservoirs in South Texas make forecasting production hazardous because effective pay thickness, porosity “cutoffs”, and lateral stratigraphic changes complicate the picture. Conventional structure and net sand isopach maps do not always yield the expected results. Permeability-feet (Kh) maps are constructed using data derived from electric logs and local geologic knowledge. These appear to show promise in helping in the selection of many new wells.

The purpose of this paper is to show how existing electric log recordings can be combined with historic reservoir data (pressure build-up tests and production data) in a manner that is mappable and easily converted to indicate the productivity of new wells. The field example selected to illustrate the method is in the Owen (Olmos) Field in Webb County, Texas ().

Pay-Per-View Purchase Options

The article is available through a document delivery service. Explain these Purchase Options.

Watermarked PDF Document: $14
Open PDF Document: $24