Measuring and testing – Volume or rate of flow – Combined
Reexamination Certificate
2007-09-25
2007-09-25
Williams, Hezron (Department: 2856)
Measuring and testing
Volume or rate of flow
Combined
C073S861000
Reexamination Certificate
active
11245893
ABSTRACT:
Methods and systems are provided for evaluating subsurface earth oil and gas formations. More particularly, methods and systems are provided for determining reservoir properties such as reservoir transmissibilities and average reservoir pressures of a formation layer or multiple layers using fracture-injection/falloff test methods. The methods herein may use pressure falloff data generated by the introduction of an injection fluid at a pressure above the formation fracture pressure in conjunction with a fracture-injection/falloff test model to analyze reservoir properties. The fracture-injection/falloff test model recognizes that a new induced fracture creates additional storage volume in the formation and that a fracture-injection/falloff test in a layer may exhibit variable storage during the pressure falloff, and a change in storage may be observed at hydraulic fracture closure.
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Baker & Botts
Frank Rodney
Halliburton Energy Service,s Inc.
Kent Robert A.
Williams Hezron
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