济阳坳陷圈闭地质风险评价标准研究

针对济阳坳陷前第三系、下第三系及上第三系等3套含油层系石油地质条件的差异,利用近期实施了钻探的圈闭开展研究,分别建立圈闭地质风险评价标准,可以充分反映当前的勘探特点,提高评价的准确性。圈闭评价地质要素包括圈闭成藏要素和圈闭品位要素两大类,前者直接决定了圈闭能否成藏,可采用圈闭钻探成功率分级方法建立评价标准;后者主要用来描述圈闭的规模和品质,可采用累计概率分级方法制定评价标准。地质风险评价标准的研究有其阶段性。

Criteria of Geologic Risk Evaluation for Traps in Jiyang Depression

Differences exist in petroleum geologic conditions a-mong the three oil - bearing sequences of pre - Teriary, Paleogene and Neogene in Jiyang depression. Criteria of trap geologic risk evaluation are established based on study of the recent drilled traps. The newly established criteria can completely reflect current features of exploration and improve the accuracy of evaluation. Geologic elements of trap evaluation have two types , namely trap accumulation and trap quality respectively. The former directly determine whether an accumulation can form in a trap and can be established based on success rate of exploratory wells ; while the latter are mainly used to describe the scale and quality of traps and can be established by using cumulative probability grading methods.