DEFINITION of 'Wellbore'

A wellbore is a hole that is drilled to aid in the exploration and recovery of natural resources including oil, gas or water. A wellbore is the actual hole that forms the well. A wellbore can be encased by materials such as steel and cement, or it may be uncased.


A wellbore provides access to the natural resources that are sought, such as oil and gas. A wellbore is typically a straight shaft that "bores" into the ground to allow the recovery of natural resources. Specialized equipment is needed to drill wellbores.

  1. Crude Oil

    Crude oil is a naturally occurring, unrefined petroleum product ...
  2. BP Oil Spill

    A 2010 oil spill that occurred in the Gulf of Mexico as a result ...
  3. Steam-Oil Ratio

    The steam-oil ratio (SOR) is a metric used to quantify the efficiency ...
  4. Crude Stockpiles

    Reserves of unrefined petroleum, measured in numbers of barrels. ...
  5. Oil Field

    A tract of land used for extracting petroleum, or crude oil, ...
  6. Oil Refinery

    An industrial plant that refines crude oil into petroleum products ...
Related Articles
  1. Investing Basics

    Oil: A Big Investment With Big Tax Breaks

    Oil and gas investments can provide unmatched deduction potential for accredited investors.
  2. Active Trading

    Oil And Gas Industry Primer

    Before jumping into this hot sector, learn how these companies make their money.
  3. Active Trading

    Uncovering Oil And Gas Futures

    Find out how to stay on top of data reports that could cause volatility in oil and gas markets.
  4. Investing

    The Most Expensive Oil Spills

    The only way to estimate the damage of the BP oil spill is to look at what past cleanups have cost.
  5. Active Trading

    Unearth Profits In Oil Exploration And Production

    Drill down into financial statements to tap into the right companies and let returns flow.
  6. Active Trading

    How Does Crude Oil Affect Gas Prices?

    Find out how this commodity's fluctuating price affects more than just how much you pay at the pump.
  7. Stock Analysis

    Deepwater Explorations That Had Profitable Results

    Learn how deepwater oil wells sometimes deliver large profits to the companies finding them, if the oil company drillers can overcome high fixed costs.
  8. Chart Advisor

    Copper Continues Its Descent

    Copper prices have been under pressure lately and based on these charts it doesn't seem that it will reverse any time soon.
  9. Economics

    The Biggest Oil Towns in Texas

    Learn about the boom of oil production in Texas cities and how the new surge of wealth into these cities is changing local economies.
  10. Stock Analysis

    What Exactly Does Warren Buffett Own?

    Learn about large changes to Berkshire Hathaway's portfolio. See why Warren Buffett has invested in a commodity company even though he does not usually do so.
  1. Which mutual funds made money in 2008?

    Out of the 2,800 mutual funds that Morningstar, Inc., the leading provider of independent investment research in North America, ... Read Full Answer >>
  2. Do hedge funds invest in commodities?

    There are several hedge funds that invest in commodities. Many hedge funds have broad macroeconomic strategies and invest ... Read Full Answer >>
  3. How much oil must be produced to maintain inventory levels in the United States?

    Domestic energy investors should track the reserve inventory of crude oil for the United States, which is released in a weekly ... Read Full Answer >>
  4. What are average operating expenses for the oil and gas sector?

    The oil and gas sector plays an important role in the economy by drilling, extracting, and processing oil and gas. Because ... Read Full Answer >>
  5. Why is investing in oil and gas in emerging markets riskier than investing in developed ...

    Investments in oil and gas in emerging markets generally carry higher risks than similar investments in developed countries. ... Read Full Answer >>
  6. How does the long-term outlook of the aerospace sector compare to the broader economy?

    As of 2015, the long-term outlook of the aerospace and defense sector is uncertain, much like the broader economy. That said, ... Read Full Answer >>

You May Also Like

Hot Definitions
  1. Take A Bath

    A slang term referring to the situation of an investor who has experienced a large loss from an investment or speculative ...
  2. Black Friday

    1. A day of stock market catastrophe. Originally, September 24, 1869, was deemed Black Friday. The crash was sparked by gold ...
  3. Turkey

    Slang for an investment that yields disappointing results or turns out worse than expected. Failed business deals, securities ...
  4. Barefoot Pilgrim

    A slang term for an unsophisticated investor who loses all of his or her wealth by trading equities in the stock market. ...
  5. Quick Ratio

    The quick ratio is an indicator of a company’s short-term liquidity. The quick ratio measures a company’s ability to meet ...
  6. Black Tuesday

    October 29, 1929, when the DJIA fell 12% - one of the largest one-day drops in stock market history. More than 16 million ...
Trading Center