National Assessment of Oil and Gas Project Bend Arch-Ft. Worth Basin Province (045) Quarter-Mile Cells

Cell maps for each oil and gas assessment unit were created by the USGS as a method for illustrating the degree of exploration, type of production, and distribution of production in an assessment unit or province. Each cell represents a quarter-mile square of the land surface, and the cells are coded to represent whether the wells included within the cell are predominantly oil-producing, gas-producing, both oil and gas-producing, dry, or the type of production of the wells located within the cell is unknown. 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 were current as of April 2003 when the cell maps were created in 2003.

美国地质调查局（USGS）为每个油气评价单元创建了栅格像元地图，以此作为可视化手段，用于展示评价单元或油气评价大区内的勘探程度、生产类型以及生产分布情况。每个像元对应地表上一块四分之一平方英里的区域，通过编码标识该像元范围内的油井主要产出类型：以产油为主、产气为主、兼具油气生产、无产能（干井），或是井位生产类型未知。该数据集的油井信息最初取自IHS能源集团（IHS Energy Group）的光盘版PI/Dwights PLUS油井数据库（PI/Dwights PLUS Well Data）——这是一个专有商业数据库，收录了美国绝大多数油气井的相关数据。研发此类像元地图的初衷，是为了解决专有PI/Dwights PLUS油井数据的可视化展示难题，且该栅格地图未展示或包含任何专有数据。在2003年制作该栅格地图时，PI/Dwights PLUS油井数据库的数据更新至2003年4月。