Structure Contour of the Top of the Cotton Valley Group, Western Gulf and East Texas Basin and Louisiana-Mississippi Salt Basins Provinces (047, 048 and 049)

This map shows the structural configuration on the top of the Cotton Valley Group 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 Cotton Valley Group. This resulted in 10,687 wells for which locations were available. After deleting the wells with obvious data problems, a total of 10,504 wells were used to generate the map. The data are provided as both lines and polygons, and the proprietary wells that penetrate the top of the Cotton Valley Group 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.

本地图展示了科顿谷组（Cotton Valley Group）顶部的构造形态，单位为海平面下英尺。本地图通过计算地表基准面（方钻杆补心海拔（kelly bushing elevation）或地面海拔）与科顿谷组顶部的上报井深之间的差值生成。最终筛选出10687口具备有效井位数据的油气井。在剔除存在明显数据瑕疵的井位后，最终共使用10504口井位数据绘制本地图。本次数据集同时提供折线与多边形两种数据格式，所有钻穿科顿谷组顶部的受版权保护井位，均以四分之一英里网格单元的图形形式进行可视化展示。
本次井位数据最初来源于IHS能源集团（IHS Energy Group）发行的光盘版PI/Dwights PLUS井数据库（PI/Dwights PLUS Well Data），该数据库为收录美国绝大多数油气井信息的专有商业数据库。网格单元的设计初衷是解决专有PI/Dwights PLUS井数据库的可视化展示难题。网格单元地图中不会展示或包含任何专有原始井位数据。PI/Dwights PLUS井数据库的相关数据截至2001年4月均为最新有效版本。