利用铀-油关系寻找地浸砂岩型铀矿

地浸砂岩型铀矿属于外生铀矿,多数产于盆地区,并与油气关系十分密切.通过地浸砂岩型铀矿的成因分类、与油气藏的关系及其与油气藏异同点的分析对比,总结出几种典型油气藏上方的放射性异常模式.以二连盆地地浸砂岩型铀矿与油气藏的客观相伴关系为例,在鄂尔多斯盆地进行了应用试验,发现在油气田上方,低铀异常、低钾异常基本重合,且铀矿床一般定位于油藏的上方或外围.实践证明利用铀-油相伴关系,在油气勘探中应注意寻找铀矿(化)床,在铀矿(化)床周围的有利构造部位应注意加强油气勘探.

Exploration Uranium Deposit of In-situ Leachable Sandstone Type Using the Relation Between Oil and Uranium

Sandstone-type uranium deposit is a kind of exogenetic uranium deposit. A majority of sandstone-type uranium deposits located in the periphery of oil-gas field have a very close relationship with oil and gas. This paper presents the classfication of sandstone-type uranium deposits, the similarities and differences between uranium ores and oil-gas accumulation, and summarizes several typical radioactive abnormality models over oil-gas field. It has been testified that low uranium and low kalium abnormality are well accorded and uranium mine distributes around or over the oil and gas accumulation. A couple of examples are given to illustrate the uranium-oil/gas associations in Erlian and Ordos basins. It is suggested that the spatial relationship of uranium ores and oil-gas should be applied in the exploration of oil-gas accumulation and sandstone-type uranium deposit.