化探-地震法综合评价圈闭含油气性——以松南盆地为例

Comprehensive Evaluation of Trap Petroliferous Nature Using Geochemical-Seismic Prospecting Method-An example of South Songliao basin

化探-地震圈闭综合评价方法是利用二维、三维地震观测系统,获取地球物理资料,通过地震处理技术精确描述地下构造圈闭的空间形态特征和影响构造圈闭的断裂的空间分布,确定构造圈闭的可靠性;运用化探技术直接检测烃类的直观性,提取在应力场作用下从圈闭中渗漏到近地表土壤中的油气信息,圈定圈闭中油气聚集部位;判识圈闭中流体属性,对勘探目标进行分类评价优选。该方法在松南油气田进行的评价实验与实践研究中,完成了对多个构造圈闭的评价优选,并经实钻验证,取得了很好的效果。

Geochemical-seisraic trap evaluation is a comprehensive method of applying 2D and 3D seismic observation systems to get geophysical information, through seismic data processing to properly describe in-situ structural trap's spatial morphology and related faulting distribution in order to define the reliability of structural traps. It can directly detect hydrocarbons within traps, pick-up oil-gas leakage information near surface soil from traps under process of stress field, delineating the location of oil-gas accumulation in traps, help recognition of fluid attribute in traps and conduct classification, evaluation and selection of explorative targets. Applying this method to Songnan oil-gas field, several structural traps have been evaluated and selected, which also passed an verification from drilling, achieving good results.