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地表土壤碘用于油气勘探的主要依据是:在地表可以获得足够光源的情况下,碘元素可替代轻烃分子中的一个或多个氢原子从而形成比较稳定的有机碘化物。地表土壤碘异常具有两种典型的异常模式——顶部高值异常与环晕状异常。根据土壤碘异常模式的形成原因,认为未开采远景区土壤碘高值异常可用于筛选有利含油气区带,详查时还可用于预测油气藏的分布范围;已采区的碘浓度高值异常,则可指示已知油气藏的扩展区。文中以实例阐述了这一认识。地表土壤碘指标的油气勘探意义在于,当与其他勘探方法结合应用时,它可从另一视角为油气勘探决策提供依据。
The main basis for the use of surface soil iodine for oil and gas exploration is that iodine can replace one or more hydrogen atoms in light hydrocarbon molecules to form a relatively stable organic iodide when enough light is available on the surface. Soil iodine anomaly has two typical anomalous patterns - top high value anomalies and halo abnormalities. According to the formation reason of soil iodine anomaly pattern, it is considered that the abnormal soil iodine value in the unexploited vista can be used to screen the favorable oil and gas zones, and the detailed investigation can also be used to predict the distribution range of oil and gas reservoirs. , You can indicate the expansion of the known reservoir. An example is given to illustrate this understanding. The significance of hydrocarbon exploration for surface soil iodine is that it provides a basis for oil and gas exploration decisions from another perspective when applied in combination with other exploration methods.