The BGS collection of paper and sepia geophysical logs from boreholes drilled by BGS and external organisations. The majority of the collection are in hard copy , but significant numbers are now available digitally. Covering the UK mainland and offshore from 1949 onwards. the commercial logs are mainly related to hydrocarbon , coal exploration or water wells. The collection covers Great Britain and the types of logs and the scales used will vary depending on the equipment available and the use of the data.

Data from onshore wells provided to BGS as part of an agreement with NSTA/OGA/DECC Digital data (includes, well logs, well reports and downhole data) for oil and gas exploration and appraisal wells drilled in the UK and held on behalf of the North Sea Transitory Authority (formerly the Oil & Gas Authority, formerly the Department of Energy and Climate Change). External data therefore BGS has no control on quality. Provided to OGA/DECC/BGS by oil companies as part of their obligations under licensing regulations, PON 9b regulations notice.