| Abstract: | Geophysical logs from two core holes in the Edwards aquifer in Texas were analyzed and the results compared to other geologic and hydrologic data obtained from well tests and core studies. The acoustic velocity, sidewall neutron, and density logs are especially useful in the study of carbonate aquifers because porosity, secondary porosity, rock composition, and bulk density can be determined from them. Under some conditions, deeply focused resistivity logs can be used to calculate formation water resistivity and the cementation exponent. The log analysis methods described can be applied to other carbonate systems by hand plotting and a few simple calculations which can be performed on a pocket calculator. The hydrologist is advised of specific criteria which his logs must meet in order to derive maximum value from the analysis. (Woodard-USGS) |
| Genre: | USGS Numbered Series |
| ProdID: | 28520 |
| Citation Author: | MacCary, L. M. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | - |
| Citation Editor: | |
| Citation End Page: | |
| Citation Issue: | |
| Citation Keywords: | |
| Citation Language: | ENGLISH |
| Citation Larger Work Title: | |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | iv, 30 p. :ill., map ;26 cm. |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | U.S. Geological Survey, Water Resources Division, |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 78-88 |
| Citation Search Results Text: | Interpretation of well logs in a carbonate aquifer; 1978; WRI; 78-88; MacCary, L. M. |
| Citation Start Page: | |
| Citation Volume: | |
| Citation Year: | 1978 |
| Type: | citation/reference |
| Text: | Interpretation of well logs in a carbonate aquifer; 1978; WRI; 78-88; MacCary, L. M. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, Water Resources Division, |
