- Title : Drilling Process by Dr. MS Farahat
- Publish : N/A
- Type Document : pdf
- Release : December 2006
- Total Page : 30 Page
- Size : 5.14 Mb
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Decrypted Contents
A well is classified as a "wildcat" (exploratory) well if Its purpose is to discover a new petroleum reservoir. In contrast, the purpose of a development well is to exploit a known reservoir. Usually the geological group recommends wildcat well locations, while the reservoir engineering group recommends development well locations. The drilling engineering group make. the designs and cost estima tes for the proposed wells. The legal group secure the necessary drilling and production rights and estab lishes clear title and rightof- way for access. Surveyors establish and stak e the well location .
Usually the drilli ng is do ne by a drilling contractor . Once the decision to drilllhc:well is made by management. the drilling engi neering group prepares a more detailed well design and writes the bid specifications. The equipment and procedures that the operator will require, together with a well desc ription, must be included in the bid specifications and drilling contract. In areas where previo us experience has shown drilling to be routine, the bid basis may be the cost per foot of hole drilled. In areas where costs can not be estimated with responsi ble certai nty, the bid basis is based on cos t per price per day. In some cases, the bid is based on cost per foot down to a certain depth or formation and cost per day beyond that point. When the wen is being financed by more than one company, the well plan and drilling contract must approved by dri lling engineers representing the various companies involved.
Aller drilling begins, the manpower required to drill the well and solve any drilling problems that occ ur are provided by:
Usually the drilli ng is do ne by a drilling contractor . Once the decision to drilllhc:well is made by management. the drilling engi neering group prepares a more detailed well design and writes the bid specifications. The equipment and procedures that the operator will require, together with a well desc ription, must be included in the bid specifications and drilling contract. In areas where previo us experience has shown drilling to be routine, the bid basis may be the cost per foot of hole drilled. In areas where costs can not be estimated with responsi ble certai nty, the bid basis is based on cos t per price per day. In some cases, the bid is based on cost per foot down to a certain depth or formation and cost per day beyond that point. When the wen is being financed by more than one company, the well plan and drilling contract must approved by dri lling engineers representing the various companies involved.
Aller drilling begins, the manpower required to drill the well and solve any drilling problems that occ ur are provided by:
- The drilling contractor.
- The well operator.
- Various dr illing service companies.
- Special consultants.
Final authori ty tests either with the drilling contractor when the rig is drill ing on a costper- foot basis or with the well operation when the rig is drilling on a cost-per-day basis. Shows a typical drilling organization often used by the drilling contrac tor and well operator when a well is drilled on a cost-per-day basis.
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