Abstract:

The method of induced polarization (IP) is used to analyze the location of the water-contained area in the Junggar Basin. By analyzing the single-point curves of the apparent resistivity and the apparent polarization, the initial information of the geology about the water-contained situation and the geological strata were recognized as well as the aquifer and the depth of the top layer in the study area. Based on the above, the 2D direct current electric inversion software is used to deduce the apparent resistivity to be close to the real resistivity of the stratum. In the analytical process, it can be found that there are some water resources in Basin Five Well, and in the area traversed by the lines of P200201, P200202 and P200207, the water content is higher.The upper Dushanzi Group of the Pliocene Formation（N₂d₂）is the ample aquifer, and the lower Dushanzi Group of the Pliocene Formation（N₂d₁）is the scanty aquifer.The characteristics of the aquifer in Basin Five Well are that the water exists in high-resistance layer while does not in low-resistance layer. It is revealed that the sandstone sediment is loosen in this area and the degree of mineralization in groundwater is low, and the groundwater quality is typically good according to the degree of mineralization.

Key words: induced polarization, apparent resistivity, apparent polarization, the Junggar Basin