Sources of data should be available for virtually every well drilled in the U.S. Drilling costs prohibit the rank wildcatting that occurred years ago. Al though wildcats are currently being drilled, seismic data, as a minimum, should be available for pore pressure estimation.
Each type of record contains valuable data that may not be available with other records. For example, log headers and seismic work are useful, particularly if these data are the only reference sources for the well.
Many sources of data exist in the industry. Unfortunately, some operators falsely consider the records confidential, when in fact the important information such as well testing and production data becomes public domain a short time after the well is completed. The drilling engineer often must assume the role of "detective" to define and locate the required data.
Sources of data include bit manufacturers and mud companies who regularly record pertinent relative information on weil recaps. Bit and mud companies usually make this data available to the operator. Log libraries provide log headers and scout tickets. And internal company files often contain drilling reports, IADC reports,' and mud logs. Many operators will gladly share old offset information if they have no current leasing interest.
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