Application of Up-dated Tracer ~(157)Gd Complex on Thermal-neutron Capture Logging
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Abstract
157Gd complex (Cl3) tracer have a good physical and chemistry characteristics in well logging. The capture crosssection 4.87×10-20 cm2 is 64.16 times of common 10B tracer using at the moment. The chemical property is stability. It takes advantage on adaptability for hightemperature, highpressure of oil reservoir and coexistence of oil/water and various elements. It hasn't abnormally response on human, instrument and tubing. 157Gd complex tracer has been used in well logging on Daqing, Zhongyuan and Nanyang Oilfields. Adopting an important measure according the logging interpretation results, the stimulation effect is obvious.
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