Structure Contour of the Top of the Travis Peak-Hosston Formations, Western Gulf and East Texas Basin and Louisiana-Mississippi Salt Basins Provinces (047, 048 and 049)

This map shows the structural configuration of the top of the Travis Peak or Hosston Formations in feet below sea level. The map was produced by calculating the difference between a datum at the land surface (either the Kelly bushing elevation or the ground surface elevation) and the reported depth of the Travis Peak or Hosston. This resulted in 18,941 wells for which locations were available. After deleting the wells with obvious data problems, a total of 18,933 wells were used for the map. The data are provided as both lines and polygons, and the proprietary wells that penetrate the top of the Travis Peak or Hosston Formations are graphically displayed as quarter-mile cells.

The well information was initially retrieved from the IHS Energy Group, PI/Dwights PLUS Well Data on CD-ROM, which is a proprietary, commercial database containing information for most oil and gas wells in the U.S. Cells were developed as a graphic solution to overcome the problem of displaying proprietary PI/Dwights PLUS Well Data. No proprietary data are displayed or included in the cell maps. The data from PI/Dwights PLUS Well Data are current as of April 2001.

本地图展示了特拉维斯峰组（Travis Peak Formation）或霍斯顿组（Hosston Formations）顶部的构造形态，单位为海平面下英尺数。该地图通过计算地面基准面（可为凯利衬管高程或地面高程）与特拉维斯峰组或霍斯顿组的报告埋藏深度之间的差值生成。此过程共得到18941口拥有位置信息的油气井数据。剔除存在明显数据问题的井位后，最终共使用18933口井的数据绘制本地图。数据以线要素与面要素两种形式提供，穿透特拉维斯峰组或霍斯顿组顶部的专有油气井以四分之一英里网格单元的形式进行可视化展示。

本次使用的井位数据最初源自IHS能源集团（IHS Energy Group）光盘版PI/Dwights PLUS测井数据，该数据库为商用专有数据库，涵盖美国绝大多数油气井的相关信息。网格单元的设计是为解决PI/Dwights PLUS专有测井数据的可视化展示难题而提出的图形化方案。网格地图中不会展示或包含任何专有数据。PI/Dwights PLUS测井数据的更新截止至2001年4月。