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近几年来由于在科拉半岛和鞑靼地区的超深井、深参数井和普查井钻达结晶基岩和里菲—文德沉积建造,才使得从结晶基岩中发现非致密带成为可能。目前,在鞑靼已有10几口深井揭开结晶基岩地层,其深度从数百米到3250米(米尼巴耶夫20000号井,图1)。这些井的资料证明,在相当深(达3200米)的基岩层中,存在裂缝性渗透储集岩带,含气的流体在其中可自由流动。米尼巴耶夫20000号井的资料表明,随着井深加大,含气的渗透带数量增多。地下水中含大量气烃和沥青物质,推断基岩裂缝、溶洞和角砾化地带可能的含油气性是由于烃类的运移:尤苏波夫(1963)和洛勃夫
In recent years it has become possible to discover non-tight belts from crystalline bedrock due to the infiltration of crystalline bedrock and the Riffine-Wende deposits in ultra-deep, deep-parameter, and census wells in the Kola Peninsula and Tatar areas. At present, about 10 deep wells have been opened in Tatar to crystallize bedrock strata with depths ranging from a few hundred meters to 3250 meters (Minibayev 20000, Fig. 1). The data from these wells demonstrate that in relatively deep (up to 3,200 m) bedrock, there are fractured percolation reservoir zones in which gas-laden fluids can flow freely. Information from the Minibayev 20000 shows that as the well depth increases, the number of gas permeable zones increases. Groundwater contains large amounts of gas and bitumen, inferring bedrock cracks, and the possible hydrocarbon-bearing properties of caves and brecciated zones are due to hydrocarbon migration: Yusupov (1963)