Process for direct measurement of the orientation of hydraulic fractures
Method for performing step rate tests on injection wells
Method for fracturing a plurality of subterranean formations
Method of hydrofracture in underground formations
Measuring while drilling Patent #: 4474250
ApplicationNo. 06/641535 filed on 08/16/1984
US Classes:166/250.1, Fracturing characteristic166/306, Fluid enters and leaves well at spaced zones166/308.1, Fracturing (EPO)175/50, Indicating, testing or measuring a condition of the formation175/58, Sampling of earth formations73/152.39Fluid injection into formation
ExaminersPrimary: Suchfield, George A.
Attorney, Agent or Firm
International ClassesE21B 49/02 (20060101)
E21B 49/00 (20060101)
E21B 47/02 (20060101)
E21B 43/25 (20060101)
E21B 43/26 (20060101)
AbstractA method of determining the orientation of a fracture or fractures created in a subterranean formation penetrated by a wellbore is provided. The method comprises creating a fracture in the formation extending from a lower end portion of the wellbore and then removing a location orientated core containing a portion of the fracture from the wellbore to thereby determine the orientation of the fracture in the formation.