> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://biasinvestors.crisp.help/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Intangible Drilling Costs

The expenses associated with drilling an oil or gas well, that have no lasting physical value such as labor, geologist expense, core analysis, etc. Most of these costs are tax-deductible in the year they are incurred.