油田规模序列法在Basin Margin背斜成藏组合资源评价中的应用

The Application of Field Size Sequence Method in the Resources Assessment of Basin Margin Anticline Play

针对高勘探程度评价单元存在两个油田规模序列的情况,以Basin Margin背斜成藏组合为例,应用油藏规模序列法进行评价。根据勘探历史资料大致估算出待发现油田的最大规模,舍弃第一个由评价单元内几个最大油田构成的规模序列,认为在勘探理念不转变的情况下,后期勘探已经无法找到与第一个规模序列相匹配的油田。以待发现油田最大储量估值为界,用第二个序列中大于此值的前几号油田储量为基础进行直接拟合,将拟合出的油田规模序列系数作为待发现油田规模序列系数,进而评价其待发现储量。

For there often had two field-size sequences in some high-degree exploration assessment units, so this article took the resource assessment of Basin Margin anticline play as an application example of Field Size Sequence Method. By analyzed the geological information, the historical exploration data and the size sequence of the discovered fields, the reserve of the largest undiscovered fields was estimated, and the first size sequence made up of the top largest fields in the assessment unit were disused. For there had little chance to find some large fields to fit the first sequence unless a new exploration theory would be applied. The fields bigger than the largest estimated undiscovered in the second size sequence were taken to fitted the undiscovered size sequence coefficient ＇K＇ directly, and then the assessment of undiscovered fields were achieved.