土壤电导率方法寻找油气田的应用效果

电导率(k_s)用于寻找油气田(藏),主要是根据油气田(藏)上方发生的氧化还原作用产生的磁电流,加之油田水作用在油气田(藏)两侧形成了氧化柱。氧化柱中的金属离子在向上扩散,迁移过程中,旁侧地层中的部分阳离子随之进入氧化柱,促使氧化柱内的电导率增高。这些地球化学过程的长期作用,在围绕油气田(藏)周缘的地表形成k_s环状异常。环状异常内侧的高背景区为指示油气田(藏)的有效分布范围。

APPLYING EFFECTS OF SOIL ELECTRICCONDUCTIVITY IN SEARCHING FOR OIL AND GAS FIELDS

Using electric conductivity(k_s)in searching for oil and gas fields(pools)is mainlybased on the magneto-electric current of oxido-reduction happened on the upper position ofoil and gas fields(pools)and oxidation column formed by oil-field wateracting on the bothsides of the oil and gas fields(pools).With the metal ions in the oxidation coltimn diffusing and migrating upward, part of cations in the side layer would enter the column andpromotes the conductivity(k_s)of the column. Under such a long-term geochemical processit would bring about ring-abnormality of K,around the peripheral surface of the oil and gasfields(pools). So high background area in the inner side of ring-abnormality indicates theeffective area of the distribution of oil and gas fields(pools).