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地洼学说认为,地壳由多种构造单元所组成。任何一种构造单元都经历过若干大地构造发展阶段,每一大地构造发展阶段具有自身的成矿专属性;后一大地构造发展阶段不仅有本阶段的矿产,而且可继承该处地壳本阶段以前发展阶段所成矿产的残留部分,即具有矿产的继承性;同时由于后-阶段的地质作用能改造前阶段的矿产,而形成多因复成矿床。这些理论是地洼学说用于找矿的理论基础。对油气的寻找亦不例外。 实战证明,地洼学说对分析成油条件和指明找油方向具有重要意义。笔者认为,运用地洼学说寻找油气,主要有如下几点:1.鉴别大地构造性质;2.寻找凹陷;3.分析建造;4.研究构造;5.综合评价。上述五个方面是一个有机的整体。对一个地区进行油气评价,考虑上述内容,能较准确地得出合理的结论。
Diwa theory that the crust consists of a variety of tectonic units. Any tectonic unit has experienced several stages of tectonic development. Each tectonic stage of development has its own ore-forming specificity. The latter tectonic stage of development not only includes this stage of mineralization, but also inherits the crust of the site before this stage In the development stage, the residual part of the mineral product, that is, the inheritance of the mineral, is also formed. Because of the post-stage geological effect, the mineral in the previous stage can be transformed to form a multi-factor complex ore deposit. These theories are the theoretical basis of diwa theory for prospecting. The search for oil and gas is no exception. Actual proof, Diwa theory to analyze the oil conditions and indicate the direction of the oil is of great significance. The author believes that the use of Diwa theory to find oil and gas, the main points are as follows: 1. Identify the nature of the earth structure; 2. Looking for depression; 3. Analysis and Construction; 4. Research structure; The above five aspects are an organic whole. Oil and gas evaluation of a region, taking into account the above, can be more accurately draw a reasonable conclusion.