多参数岩性地震反演在大民屯凹陷三台子洼陷砂砾岩储层预测中的运用

Application of Multi-Parameter Lithologic Seismic Inversion to Predict Glutenite Reservoirs in Santaizi Subsag of Damintun Sag

大民屯凹陷三台子洼陷勘探的关键问题是在大套砂砾岩体中识别出有效储层,这类围岩和储层的声波时差没有差异,运用波阻抗属性无法进行识别。而测井对比分析表明,含油砂砾岩段与围岩段的自然电位、电导率存在明显差异。因此选择自然电位、感应等对本区储层特征比较敏感的电性曲线,与地震信息建立联系,应用多参数岩性地震反演可有效识别储层。应用反演结果部署的两口探井均获工业油流。多参数岩性地震反演对类似储层的识别具有重要的借鉴作用。

It is the key to identify effective reservoirs from large sandstone body during exploration of Santaizi subsag of Damintun sag.There is no difference in acoustic transit time between this kind of wall rock and reservoir,so it is impossible to recognize by using the properties of wave impedance.Comparative logging analysis shows that there exist remarkable differences in spontaneous potential(SP)and conductivity between petroliferous glutenite segment and wall rock segment.Therefore,it is available to effectively identify reservoirs by selecting SP or induction curves with electric properties sensitive to the reservoir characteristics of the studied area,forming a linkage between the curves and seismic information,and then applying multi-parameter lithologic seismic inversion.Industrial oil output are obtained from the two exploration wells which are deployed on the basis of using the inversion results.This can be a good reference to the recognition of similar reservoirs.