火山岩断裂识别方法及其在滴西地区的应用

火山岩储层具有"小而肥"的储集特点。与火山岩的储集特点相对应的是火山岩预测的不准确性。大量的研究表明断裂对火山岩油气藏具有较强的指示意义。通常,地球物理工作人员采用剖面预测方法对断裂进行预测。但该项技术不适于火山岩的杂乱反射剖面。相干体和曲率体是目前可靠度较高的两类地震属性体。这两类数据体具有受人为干扰少的特点。基于此,采用了相干数据体和曲率数据体作为原材料,利用滴西10井区的火山岩顶作为母层,结合滴西地区的地质条件和构造史,采用层平移的方法,构建了时空格架下的断裂观测系统。在此系统下,对检测出来的不连续体属性进行判定。最后,对断裂进行分类和划分。研究结果显示,该方法的预测结果和滴西地区的所形成的地质认识基本吻合。

A method of predicting volcanic fault and its application in Dixi area

The volcanic reservoir is a successive area of gas resources, with the characteristic of smaller body but higher production. Accompanied by the characteristic, the volcanic fault is hard to predict exactly. Considerable researches have shown that fault is a key indicator on exploring gas reservoirs. The geophysicists generally predict faults by explaining seismic profiles, which is proved unsuitable to volcanic faults. At present, among the seismic attributes, the coherence cube and curvature cube are highly acknowledged technologies used to explain faults. Because they are independent from interpreters. Based on these, we utilized the coherence data and curvature data as initial data. Then, we defined the top level of volcanic as the target horizon. Following this, many artificial horizons are created. The explanation system is established with the slices and created horizons. With the help of this system, we justified the discontinuities explained. Last, the faults are sorted and divided by fault attributes. The consequence of the research suggests that the method of fault prediction is generally matched with geological condition.