Abstract: A multi-zone formation has a plurality of sliding sleeve valves for selective access to the formation from the wellbore. Each of the sliding sleeves has a unique latch profile such that an initial dart with a matching profile will land on the predetermined sleeve. With all the sliding sleeves initially in the position where access ports are closed the sleeve that gets the first dart has pressure applied to shift that sleeve to the ports open position for well treatment. Thereafter, a second dart lands on the first effectively closing the ports just opened. Further pressure closes the sliding sleeve and blows both darts to hole bottom. Any other sleeve can then be selected with a unique profile that matches another sliding sleeve and the process repeats. For production selected sliding sleeves are opened preferably with a wireline shifting tool.

Abstract: Different zones are fractured with proppant containing tracer dye of different colors that is encapsulated in the proppant. The presence of an undesired material such as water removes the coating to allow the uniquely colored tracer dye to be released during production. Surface personnel note the color of the dye and associate a specific zone that is producing the undesired material. Steps are taken to close off the offending zone as production continues from the other zones in the borehole.

Abstract: A multi-zone formation has a plurality of sliding sleeve valves for selective access to the formation from the wellbore. Each of the sliding sleeves has a unique latch profile such that an initial dart with a matching profile will land on the predetermined sleeve. With all the sliding sleeves initially in the position where access ports are closed the sleeve that gets the first dart has pressure applied to shift that sleeve to the ports open position for well treatment. Thereafter, a second dart lands on the first effectively closing the ports just opened. Further pressure closes the sliding sleeve and blows both darts to hole bottom. Any other sleeve can then be selected with a unique profile that matches another sliding sleeve and the process repeats. For production selected sliding sleeves are opened preferably with a wireline shifting tool.