Improving Unconventional Completions by Pinpointing Multistage Fracturing with Coiled Tubing: Cases Histories from Burgos Basin

Abstract

In northern Mexico, from the Burgos basin to the Chicontepec field, horizontal wells have been a viable choice for exploiting hydrocarbons in tight gas and shale reservoirs. Successful drilling and completion of such wells has allowed goals in this complex operation to be reached. The learning curve trend means good knowledge has been acquired and difficulties encountered during completions can be addressed using new techniques available within the area. To achieve high performance when fracturing multiple zones, the application of an abrasive perforating technique using coiled tubing (CT) has proven a very effective alternative for acquiring optimum results. This has been particularly true for applications in highly deviated and horizontal wells. Although this technique has been applied in others regions since 1998, its implementation within this region has only become more common during the past three years. Using field experience with actual cases, this paper illustrates the available technologies and techniques that have become a new process in this region. Because of the undisputed completion and production results, pinpoint multistage fracturing is becoming the preferred completion technique used by the operator and will be used extensively as more horizontal wells are scheduled to be drilled and completed in upcoming years. Similarly, this has been the preferred choice when the formation is estimated to produce liquids.