论文部分内容阅读
在能源和矿产资源勘探开发过程中,必须找到地下含水层或含油层,以提供进一步的勘探和开采工作的依据。电阻率是寻找地下含水,含油气通道的重要参数。传统的测井方法是测量井孔围岩的电性参数。不过,找到地下断裂破碎带及含水通道对于整个施工安全及效率都至关重要。因此,迫切需要一种有效探测地下低阻通道的测井方法。在本文中,构造了一个特殊的电测井模型。在一个井中供电,在另外一口井中每个测点测量其响应。利用有限元软件Ansys进行正演计算,并且通过特殊的数据处理方式得到两井间电阻率的分布状态,从而对地下水文地质构造特征进行定性及定量的解释工作。本文中提出的测井模型对探测井间含水通道、破碎带等低阻体有一定的意义;也有利于指导相应的测井仪的设计和测井数据处理方法。
During the exploration and development of energy and mineral resources, underground aquifers or reservoirs must be found to provide the basis for further exploration and exploitation. Resistivity is an important parameter to find underground water and oil and gas channels. The traditional logging method is to measure the electrical parameters of the borehole surrounding rock. However, finding broken fractures and aquifers underground is crucial to the overall safety and efficiency of construction. Therefore, there is an urgent need for a well logging method that can effectively detect underground low resistance channels. In this paper, a special electrical logging model is constructed. Power is supplied in one well and its response is measured at each measuring point in the other well. The finite element software Ansys is used for forward calculation, and the distribution of resistivity between the two wells is obtained through special data processing methods, so as to qualitatively and quantitatively explain the hydrogeological geological structure. The logging model proposed in this paper is of great significance to the exploration of low resistance bodies such as aquifer channels and broken belts. It is also helpful to guide the design of corresponding logging tools and the logging data processing methods.