Pinned Post
Magnetic Ranging
This could be a shower curtain to buy off the shelf at a Target store, complete with floral patterns; it's not. It's a map of Lower Barnett shale HZ gas wells in Tarrant County, Texas, within the city limits of Fort Worth. The floral patterns are laterals from single well pads that extend out into a man-made lake in a very wealthy neighborhood south of downtown.
Early in this play wells cost $4-5MM to drill and complete and now cost $7-9MM per well, providing you can find a place to put one. They typically make 3 BCF each and produce 100-200 MCFPD, forever, with very low pressure. If you ever fly into DFW airport you can thousands and thousands of these gas wells in and around the airport.
So how in God's name does an operator drill these wells like the direction survey plot above without those wells banging into…
Getting to be bread and butter for us here. SAGD runs 1Km laterals, at 5 meters spacing max 1 meter deviation or the shouting begins.. AMR on coil tubing and the bit chases. Normal is 10cm or less deviation, of course normal has wiggle room. Not much though. Sonar 3d mapping after to verify before putting into service is not uncommon. Three to 6 months of steam, then enjoy 25 years of production. Rinse and repeat until the pad is full. Abridged version. Cheers