金昌油子洼地区微生物评价应用研究

Microbiology Evaluation and Application in Jinchang Youziwa Area

在金昌油子洼地区首次应用油气微生物勘探,对工区采集的样品进行了微生物数量及活性分析。通过对比地质资料和异常值结果,得出该区油气聚集规律和展布范围,明确了该区油异常值较大,气异常值较小。通过青土井浅油藏与工区内微生物异常值的对比发现,该区油异常值与重力异常值低值区分布范围比较吻合,表明工区内的油气与邻近生油凹陷关系密切,合理直观地分析了金昌油子洼地区的含油气远景。最后讨论了工区微生物异常结果和沉积相、油源等地质综合因素的关系,对潮水盆地侏罗系的勘探有一定指导意义。

Microbiology hydrocarbon exploration was firstly applied in Jinchang Youziwa area. Samples are taken from this area for microbial population and activity analyses. Through comparison of geologic data and abnormal values,the hydrocarbon accumulation rules and distribution extent are obtained,and large anomaly in oil accumulation and small anomaly in gas accumulation are verified as background values. The microbiological anomaly comparison between Jinchang Youziwa area and Qingtujing shallow reservoir indicates that,the extent of oil anomaly agrees with that of low gravity anomaly,which suggests that hydrocarbon accumulation is closely related to adjacent source depression. The hydrocarbon potential of Jinchang Youziwa area is analyzed reasonably and intuitively,and the relationship between microbiological anomaly and comprehensive geological aspects such as sedimentary facies and oil- source is discussed,which will provide guidance for the exploration of Jurassic formation in the Chaoshui Basin.