柴达木盆地航磁直接找气的地质效果

• 作 者: 李卢玲 张用夏 周伏洪
• 机 构: 地质矿产部航空物探总队,地质矿产部航空物探总队,地质矿产部航空物探总队,
• 出 处: 石油地球物理勘探
• 发表日期: 1987年02期
• 关键词: 航磁测量 地质效果 磁异常 上覆地层 油气藏 地球物理 沉积盖层 三湖地区 构造图 七个泉组

柴达木盆地沉积盖层中缺乏火成岩活动,人文干扰不大,具有航磁测量的良好地质及地球物理条件。地下油气藏中的碳氢化合物向地表渗透,在上覆地层中引起化学反应,生成磁铁矿,引起了磁异常。利用超低空高精度大比例尺的航磁测量,圈出了大片弱小磁异常。已被证实此磁异常与油气田有关。此项经验有可能为西北其它有类似条件的盆地所利用。

There is a lack of igneous activity in the sedimentary cover of the Qaidam basin, which has little humanistic interference and has favorable geological and geophysical conditions for aeromagnetic surveys. Hydrocarbons in the underground oil and gas reservoirs infiltrate the earth’s surface, causing chemical reactions in the overburden, generating magnetite and causing magnetic anomalies. The use of ultra-low-altitude high-precision large-scale aeromagnetic survey, encircled a large weak magnetic anomaly. It has been confirmed that this magnetic anomaly is related to oil and gas fields. This experience is likely to be exploited by other basins in the Northwest which have similar conditions.