改进的模糊-灰色综合评判方法在储层定量评价中的应用——以苏里格气田苏X井区盒8下亚段低渗透气藏为例

发布时间：2018-06-21 22:28

  本文选题：定量评价 + 模糊数学　； 参考：《石油与天然气地质》2017年01期

【摘要】：储层认识不成熟以及评价信息不完备等问题,给苏里格气田苏X井区盒8下亚段低渗透气藏早期的储层评价带来很多不确定性,进而无法精细刻画储层特征。如何充分体现储层评价过程的不确定性以及有效扩大评价结果的差异性,则成为改善储层评价效果的关键。以隶属度为纽带,按照多信息叠合思想,将不确定方法中的模糊综合评价和灰色关联评价方法有机组合,对内部算法进行差异化改进处理,建立了更加有效的模糊-灰色综合评判方法。实例应用表明,新方法在兼顾研究区储层评价模糊性和灰色性的同时,还提高了低渗透储层的区分度,提升了储层描述的精度。根据改进后的储层分类结果,将盒8下亚段划分出4类储层,其中Ⅰ和Ⅱ类为有利储层。平面上储层展布与过去的近连片认识相比刻画得更加精细,储层类别间具有较好的区分,更贴近河流沉积的发育规律和地质知识库,与已有实践成果和地质认识也大致匹配。该方法能够快速有效地指导气田勘探开发部署实践,为类似的低渗透储层评价提供了新的思路。
[Abstract]:Some problems, such as immature reservoir knowledge and incomplete evaluation information, bring a lot of uncertainty to the early evaluation of low permeability gas reservoir in Su-8 sub-member of Su-X well area in Sulige gas field, which can not accurately depict the reservoir characteristics. How to fully reflect the uncertainty of reservoir evaluation process and effectively expand the difference of evaluation results is the key to improve reservoir evaluation effect. Based on the idea of multi-information superposition, the fuzzy comprehensive evaluation and grey relational evaluation are combined to improve the internal algorithm. A more effective fuzzy-grey comprehensive evaluation method is established. The application shows that the new method not only considers the fuzziness and grayness of reservoir evaluation in the study area, but also improves the differentiation of low permeability reservoir and the accuracy of reservoir description. According to the result of improved reservoir classification, the lower part of Bo8 is divided into 4 types of reservoirs, among which type 鈪，

本文编号：2050287