新型示踪剂钆-157络合物在热中子俘获测井中的应用

Application of Up-dated Tracer ^(157)Gd Complex on Thermal-neutron Capture Logging

钆-157(157Gd)络合物示踪剂[157Gd(En)3]Cl3在测井方面具有较优良的物理化学性质,其俘获截面达4.87×10-20cm2,是目前常用示踪剂硼的64.16倍;其化学性质稳定,具有能适应油层的高温、高压和油水及多种元素并存状况的优点,并且对人体、仪器和套管不产生不良反应。将其应用于大庆、中原和南阳油田测井,根据其测井解释结果对油井实施堵水措施后,增产效果明显。

157Gd complex (Cl3) tracer have a good physical and chemistry characteristics in well logging. The capture crosssection 4.87×10-20 cm2 is 64.16 times of common 10B tracer using at the moment. The chemical property is stability. It takes advantage on adaptability for hightemperature, highpressure of oil reservoir and coexistence of oil/water and various elements. It hasn't abnormally response on human, instrument and tubing. 157Gd 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.