(40) NEWER METHOD OF HORIZONTAL WELL EVALUATION
Around the world, the focus of completing and stimulating wells has been based mainly on the efficiency of the completions and stimulation. While this is sound, too little focus has been paid to where the oil, gas and water is originating. Enormous opportunities abound to go back into these wells and evaluate them to determine the best candidates and zones to refrac.
This presentation will introduce an evaluation method, The Refrac Road Map,™ that has been tried and proven to be successful in several horizontal wells in West Texas. The Refrac Road Map™ is the updated version of this technology, designed to obtain more information than the previously mentioned system above. The previous system was designed and used to locate where water and oil were originating in an open hole carbonate well in West Texas and New Mexico. The updated version of the system has the following features:
• Isolates a perf cluster or sleeve
• Produces that isolated section of the well
• Directly measures
o 3 phase flow
o Static and Flowing bottom hole pressure
o Temperature
• Sensors
o Ultrasonic Doppler flow measurement
o Gas holdup: Optical Probe
o Water Hold Up: Electrical
o Oil Detection: Fluorescence Probe
The nature of horizontal wells makes standard production logs unreliable. This system isolates each zone, thus allowing true measurements rather than analysis of the mixed fluid in the lateral. With this data and mechanical diversion, we believe that refracs will become much more successful and profitable in the future.