论文详情
东营凹陷深部储层埋深大、储层薄,为干燥环境下沉积的红层,采用常规储层描述与预测方法难以取得好的效果。在流度属性表征方法计算公式详细推导和流度属性本质含义解剖的基础上,根据研究区岩石物理参数和流体置换的特征,建立了含油层和干层的理论模型,发现将储层主频作为优势频率提取的流度属性,具有很好的有利储层识别度,含油砂体的流度属性能量团比干层及其它地层的能量要强。对东营凹陷深部实际三维工区数据进行目标处理,过井剖面的有利储层得到很好展示;沿层流度属性切片,其储层厚度、储层流体类型及其分布范围与井点图吻合度很高,进一步验证了方法的有效性。研究成果拓展了流度属性的应用范围(以往仅局限于低频),也为深部储层预测开辟了一条新的途径,具有重要的理论意义和较好的推广价值。
Dongying Sag features thin reservoirs at a large burial depth,and “red bed” geological formations deposited in a dry environment.Conventional methods do not perform well when predicting the occurrence and describing deep reservoirs.On the basis of a detailed derivation of the formula for the mobility attribute and the characterization of its essential meaning,the models for oil-bearing and dry layers were established according to the petrophysical parameters and fluid replacement in the study area.It was found that the mobility attribute obtained by taking the main frequency of the reservoir as the dominant frequency was beneficial to the reservoir identification.Moreover,the energy cluster of the mobility attribute in the oil-bearing sand body was stronger than that in the dry layer and other strata.Test results on three-dimensional field data from Dongying Sag demonstrated the presence of a favorable reservoir passing through the well section.The reservoir thickness,fluid type,and distribution range were very consistent with the well point diagram in the mobility attribute section along the layer.The research results expanded the range of application of the mobility attribute,which was previously limited only to low frequencies,and carry an important theoretical significance for deep reservoir prediction.
中国石化科技部项目(P18051-4)和国家科技重大专项(2017ZX05072-001,2017ZX05009-001)共同资助。