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Extra info for Horizontal and Vertical Drilling

Example text

On all dry hole AFE's the cost of plugging and abandoning must be considered. Figure two days rig cost to plug and abandon most wells. Call for a bid on cement services and base your cement on the amount of productive zones that may be encountered. For example, if the geology shows that you will go through four sands, then figure four plugs. The sands may all be wet but it is necessary in most states to plug all four to isolate each zone from the others. So you figure in four bottom plugs, one plug 100 ft out and one 100 ft in at the surface casing plus a 1a-sack plug at the surface.

Also make sure that an inspection report is available. If it is not, get a good inspection firm to inspect the drill string before it leaves the rental yard. One small piece of slag can mess up an MWD tool, and to see the effect, just calculate what it costs to pull a string for a piece of slag. A lot of bad pipe is in the field, so beware of too cheap a price. You get what you pay for in rental pipe. Along with the pipe, you will need all the handling tools and drill collars as well as heavy wate drill pipe.

Therefore, additional cement is needed at the seat to assure that the drilling operation will be successful if high pressure is encountered. So when drilling in southern Louisiana, always figure in one squeeze cementing job. 22 Chapter Two 23. Well-site supervision: Well-site supervision is easy to figure. First, figure five days for location building. Add the estimated days of the drilling operation. Then figure eight days for location clean-up, depending on the area. Some locations can be cleaned up in one or two days, but some take a week.

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