土壤电导率方法寻找油气田的应用效果

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

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。

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 diffus-ing 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).