石油测井用中子源辐射屏蔽研究

放射源测井技术是当今石油勘探和开发中必不可少的手段，开展对测井人员的屏蔽防护研究十分必要。将聚乙（丙）烯与碳化硼和氧化铝等以不同比例混合后制成的板材和织物具有良好的热中子、中能中子和快中子屏蔽效果，加工成屏蔽装置后，可使镅－铍源中子的屏蔽率达到６２．０６％，γ射线屏蔽率达到３２．４３％，结合中子辐射防护服和防护围裙等的使用，可较好地解决测井人员的辐射防护问题。

THE RESEARCH ON RADIATION SHIELDING OF NEUTRONSOURCE IN OIL-WELL MEASUREMENT

The research on radiation protection is very important in oil- well measurement , because of the harm of radiation to employees. The variety mixture of Polyethylene and/orPolypropylene and Boron carbide and Lead oxide can be made into plates or fabric which hasexcellent shielding properties to thermal, middle energy and fast neutron. The neutronshielding ratio of a shielding equipment which is made up of such materials to AmericiumBeryllium neutron source is 62. 6%, and -ray shielding ratio is 32. 43%. The harm of radiation to employees in oil-well measurement can be reduced by using of the shielding equipment combining with neutron protective clothing and apron.