Author: Richard Stevens
Directional Coiled Tubing Drilling (DCTD) is a highly effective and efficient method of accessing tight and isolated reservoirs. The ability to drill extended laterals with precise depth control means that even relatively impermeable formations may be exposed over sufficient length to be economically productive. The ability to side-track existing wellbores and steer accurately to isolated, undrained targets revealed by 21st century seismic techniques breathes new life into old assets.
But there are limits. The laws of physics set an upper limit on the horizontal reach of coiled tubing, as we discussed here.
One way of overcoming these limits is to use . . .
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