共 7 条
[6]
Measuring resistivity changes from within a first cased wellto fluids injected into oil bearing geological formation from a secondcased well while passing electrical current between the two casedwell .2 Vail W B. U.S.Patent No.5187440 . 1993
[7]
Effects of Well Casing on Potential Field Measurements Using Downhole Current Sources .2 Schenkel C J and Morrison H F. Geophysical Prospecting . 1990