摘要：

逻辑信息法是数量化理论的一种，该方法是以数理逻辑、组合分析及数理统计为基础的一种综合数学分析方法。通过比较观测对象结构上的相似性，评价这种结构个别元素的作用。本文利用逻辑信息法评价准噶尔盆地断层的封闭性。通过对标准对象（典型的已知封闭性的断层）影响因素的逻辑运算，筛选出主要地质参数，根据它们对断层封闭性影响的大小分别赋予权值，经计算得出各标准对象的对象权，与其封闭性相对照，就可以建立断层封闭性判别模型。将此模型应用到准噶尔盆地的10条断层中，评价值与实际情况的符合率可以达到90%。利用此方法成功解释了五彩湾未能形成整装大气田，呼图壁气田下盘有气，上盘无气的原因。这证明利用逻辑信息法评价断层封闭性是有效的。

Abstract:

Logic-information method is one kind of theories of quantification, and it is a comprehensive mathematical analyzing method that bases on symbolic logic, combinatory analysis, and mathematical statistics. By comparing the structural similarity of the objects, this method can evaluate the effect of some special factors. This article uses logic-information method to evaluate the fault sealing in Junggar Basin. This article filters the main geological indexes by logical calculation of the affecting factors of the standard objects (the typical fault whose sealing character is known). According to the affecting ability to the fault sealing of the geological indexes, some weightings are assigned to them. Then, object weightings of the standard objects can be calculated. Comparing these weightings with the fault sealing, the evaluating model of fault sealing can be built up. This model is used to evaluate ten chosen faults in Junggar Basin. The coincidence rate of the evaluating result and the real value is as high as 90%. This method can solve the following two problems in Junggar: why there is no large scale gas field in Wucaiwan region and why gas assembles only in the bottom wall of the fault in Hutubi gas field. Both of these prove that logic-information method can evaluate fault sealing efficiently.