应用微磁寻找油气藏的研究现状与展望

Today and future of hydrocarbon reservoir exploration using micromagnetization

本文探讨了应用微磁寻找油气这一领域的研究现状以及发展趋势，总结了微磁异常的形成机制。文章指出：有多种因素可导致微磁异常，如碳氢渗漏环境中产生的磁性矿物，岩石中的碎屑磁铁矿，沉积岩的热变质作用产生的燃烧渣以及其它干扰因素等。由于微磁的形成与分布存在三种不确定性：①在碳氢渗漏环境中微磁的形成与分布的固有的不确定性；②由地下水的“移流效应”导致的不确定性；③化探异常的不确定性。因此，我们在研究中应遵守一定的准则，并将微磁纳入到非地震找油法的系统中，以多方法、多参数的结合为手段来提高信息准确度。

We analyse both the present situation and development tendency of micromagnetization hydrocarbon exploration, and summarize formation mechanism of micromagnetic anomaly. There are many factors causing micromagnetic anomaly, for instance, magnetic minerals produced in hydrocarbon seepage environment, clasticmagnetite in rock beds, burnt dregs due to igneous metamorphism of sedimentaryrocks, and other disturbance factors. The generation and distribution of the micromagnetization have three uncertainties, namely, the intrinsic uncertainty in hydrocarbon seepage environment, the uncertainty due to migratory effect of underground water, and the uncertainty of chemical exploration. Thus, we must obeysome definite rules in micromagnetization research. In addition, the micromagnetization exploration should be grouped in non-seismic oil exploration methods, andcombine with other methods to improve its accuracy.