相干分析技术在泥岩裂缝油气藏预测中的应用

Application of coherence analysis technology in the prediction of fractured shale reservoirs and its effect analysis

胜利油田罗家地区泥岩裂缝油气藏多发育在含灰质的油泥岩、油页岩等特殊的岩相带 ,并且以构造裂缝为主 ,与断层关系密切 ,进行泥岩裂缝油气藏地震相分析和断层的精细描述是预测泥岩裂缝油气藏的关键。结合工区的具体地质特点 ,运用相干分析技术 ,预测了泥岩裂缝发育的有利沉积相带和精细断裂系统特征 ,为该区泥岩裂缝的综合描述提供了依据。

In Luojia area of Shengli Oilfield fractured shale reservoirs developed mainly in some special petrofacies such as calcareous oil sludge rock and oil shale. Tectonic fissures dominate the reservoirs. They are closely related with faults. Therefore, the key to the prediction of fractured shale reservoirs lies in seismic facies analysis of fractured shale reservoirs and fine description of faults. In combination with the specific geologic characteristics of the work area, we successfully predict the favourable sedimentary facies for fractured shale reservoir development, and depict fracture system finely through applying coherence analysis, which lays sound foundations for comprehensive description of shale fracture in the area.