新疆区域布格重力异常与油气普查

THE REGIONAL BOUGUER GRAVITY ANOMALIES AND OIL/GAS EXPLORATION IN XINJIANG

塔里木盆地、准噶尔盆地、吐鲁番盆地是新疆境内三大盆地。其中塔里木盆地乃是全国最大的内陆盆地。在这些盆地中,中、新生代地层发育、分布广泛,厚度大,具备良好的油气生成条件。准噶尔盆地西缘的克拉玛依,乌尔禾油田具一定规模,已成为我国重要石油基地之一。塔里木盆地已发现依奇克里克,柯克亚油田。吐鲁番盆地也有胜金口小油田。但是由于这些盆地范围大,覆盖广,地质地球物理研究程度低,因此要在几万平方公里,甚至几十万平方公里面积内选择进一步进行油气普查的地区相当困难。可是在盆地内选择进一步普查区又是十分重要的问题。为了加快油气普查勘探速度,缩短油气普查时间,

The author discusses the characteristics of regional Bouguer gravity anomalies in several main oil/gas fields in Xinjiang. Based on the location of regional Bouguer gravity anomalies and oil/gas fields, It is suggested that the known oil fields are mainly situated in the two following zones of Bouguer gravity anomalies: the one is the gradient zone in "gravity-high" margin areas, An example is Karamay oil field; the other is called the "gravity low" and its margin, taking Singginkou, Oxkilik, Kokyar oil fields, for examples.The author suggests that geologists should make full use of regional Bouguer gravity data for prospecting oil and gas. According to regional Bouguer gravity anomalies in Xinjiang, the author point out several potential areas for oil and gas fields, such as the two sides of Bachu "gravity high" and the south gravity zone in Fuhai "gravity high".