Tiltmeter Hydraulic Fracture Mapping in the North Robertson Field, West Texas

摘要

This paper presents both downhole and surface tiltmeterhydraulic fracture mapping results of five fracture treatments(in two wells) in the Clearfork formation located in the NorthRobertson Field, West Texas. This field is under waterfloodand both injectors and producers are generally fracture treatedin three stages at depths of roughly 6,000 to 7,100 feet.Surface tiltmeter mapping was performed on all fivetreatments to determine hydraulic fracture azimuth and dip.Downhole tiltmeter mapping was performed on 2 treatmentsin one well to determine the fracture geometry (height andlength). In addition, other diagnostic technologies such asfracture modeling and radioactive tracers were used and theirresults and conclusions are discussed in conjunction withtiltmeter mapping. Understanding hydraulic fracture growth isof critical importance for evaluating well placement and therisk of communication between producers and injectors and toassess fracture staging, perforating and well performanceissues.