Increasing Borehole Logging Efficiency at the Pailas Geothermal Field - A Recently Designed Electronic Well Log Data Sheet Using Microsoft Excel

Abstract

Up until recently all of the borehole log data compiled at the Pailas Geothermal Borehole Field (rate of penetration, weight on bit, mud temperature, pump pressure and revolutions per minute) were taken down manually from daily borehole drilling parameter sheets prior to being copied to the log sheets (previously taken down by hand) and then transferred by hand to 60 cm x 150 cm strip sheets maintained on site during the drilling process of the well. A hand drawn lithologic column accompanied by a column for the lithologic description of the rock cuttings and an additional column for added comments was included on the log sheet. Upon well completion the borehole log data was sent to an AutoCAD technician to be redrawn which commonly led to confusions regarding penmanship. Also, delays in the completion of the final document caused by numerous revisions of the AutoCAD copy resulted in extremely long turn-around times between borehole and data log sheet completion.

To help speed up the process of the borehole log data sheet completion, all well drilling parameter data is now recorded electronically in a Microsoft Excel data sheet which follows the same format as the previously used hand drawn log sheets. Additionally, a PC unit on the rig floor is used to directly enter well parameter data. This data is copied to a flash disk and transferred to a PC unit in the Geology Trailer where it is incorporated into the digital well data log sheet.

This document discusses how this well log data sheet in Excel was created and how it’s implementation has increased efficiency at the well site as well as in the office.