HOUSTON -- Baker Hughes has tested a large-diameter sidewall coring tool offshore Brazil. The MaxCOR rotary sidewall coring tool – said to be an industry first – was developed in response to a request for 1.5-in. (3.8-cm) diameter core samples greater than 2 in. (5 cm) in length.
During a first field test, the client requested 90 cores throughout the reservoir. The tool recovered 94 cores in four runs. During another test at a second exploration location, MaxCOR completed a 54-core program in two runs.
“MaxCOR provides three times the volume of core compared to standard 1-in (2.5-cm). diameter sidewall coring tools,” says Gary Cresswell, VP Wireline Systems at Baker Hughes.
“The higher core volumes provide better results when analyzing mechanical properties, relative permeability, compressibility, capillary pressure, electrical parameters and geomechanical properties. More accurate measurement of these attributes helps operators better understand the reservoir.”
Baker Hughes says MaxCOR is the only coring tool capable of recovering large-diameter core samples after a well is drilled to cover intervals either not cored with conventional coring operations, or where conventional coring operations did not achieve 100%. The company is looking to extend the technology to complex reservoirs and higher-cost operating environments.