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在断层圈闭勘探中,对控圈断裂的侧向封闭性评价十分重要.但由于受到钻井资料的限制,目前在少井或者无井地区缺少有效的评价方法.本文对渤海湾盆地饶阳凹陷留楚地区进行拟声波约束反演,利用拟声波反演体提取楚18x控圈断裂两侧38口虚拟井的拟声波曲线,并计算虚拟井的泥质含量曲线;基于SGR算法对断层侧向封闭性进行定量评价,并与两口实钻井评价结果进行对比.结果表明,新方法评价结果更加符合实际勘探情况,证实了该方法在少井或无井地区应用的可行性.
In the fault trap exploration, it is very important to evaluate the lateral sealing of the control circle faults.But due to the limitation of drilling data, there is no effective evaluation method in the shallow or no-well regions at present.In this paper, Quasi-sonic constraint inversion is performed in Liuli area and Quasi-sonic inversion body is used to extract the pseudo-acoustic curves of 38 virtual wells on both sides of Chu 18x control ring fault and calculate the shale content curve of the virtual well. Based on the SGR algorithm, The results show that the new method evaluation results are more in line with the actual exploration situation, which proves the feasibility of the method in the application of less or no well.