摘要 |
A method to obtain gain-corrected measurements. A measurement tool having one or more arrays is provided, wherein the arrays include two co-located triaxial transmitters and two co-located triaxial receivers. Measurements are obtained using the transmitters and the receivers. Impedance matrices are formed from the obtained measurements and the impedance matrices are combined to provide gain-corrected measurements. The apparatus may alternatively be a while-drilling logging tool having one or more arrays, wherein each array comprises a transmitter, a receiver, and a buck, and wherein the signal received by the receiver is subtracted from the signal received by the buck or vice versa. A slotted shield may be incorporated into either embodiment of the tool. The slots may form one or more island elements. A material is disposed in the slots. The islands and shield body have complementary tapered sides that confine the islands within the shield body. |
申请人 |
SCHLUMBERGER CANADA LIMITED;SCHLUMBERGER TECHNOLOGY B.V.;PRAD RESEARCH AND DEVELOPMENT LIMITED;SERVICES PETROLIERS SCHLUMBERGER;SCHLUMBERGER HOLDINGS LIMITED;HOMAN, DEAN, M.;LEGENDRE, EMMANUEL;TAHERIAN, REZA;SEYDOUX, JEAN;CHOI, EUNMI;MINERBO, GERALD, N.;KRYUKOV, SERGIY;SMITH, ROBERT, C. |
发明人 |
HOMAN, DEAN, M.;LEGENDRE, EMMANUEL;TAHERIAN, REZA;SEYDOUX, JEAN;CHOI, EUNMI;MINERBO, GERALD, N.;KRYUKOV, SERGIY;SMITH, ROBERT, C. |