Use radon measurement to explore oil and gas

one have to improve the sampling device and test conditions.The added sealing rubber ring in the improved sampler could not only act as a sealing but also locate casing pipe;the inprovement of test conditions include prolonging the sampling time and increasing well-hole depth from 35 cm to 155 cm. The improved device was used to test Wen-31 oil pool

the counting rate was more than 80 pulse/min. The cyclic anomaly was clearly reflected in plan

and negative anomaly was also measured.