New tracers and their analysis methods , new developments on the interpretation of tracer response and new concepts & methods contributed on tracer methodology . since 1980s , interwell radiotracer test has gained rapid development . the main reasons are radiotracers has the advancetages of high sensitivity , wide selectivity and no chemical contamination on the reservoir 自上世纪八十年代以来,放射性井间示踪测试在国际上得到了很大的发展,主要是因为放射性示踪剂具有种类多、检测灵敏度高、并且对油藏不产生化学污染等优点。
Main point of sdt is : when an interwell tracer test is conducting , the short - term changes of injection and / or production rates of the wells involved can generate abnormal tracer responses at the wells where tracer is already in producing ; by analyzing the abnormal responses , information on flows produced at the production well from different directions can be obtained 造成采油井上示踪剂响应的突变,据此评价采油井中不同方向k来水之问的关系。在传统的井间示踪测试中使用微扰法,可以更快地获得测试结果并且还可以获得其它方向水流的信息。