Abstract: The unique temperature change rule of heavy oil thermal recovery wells' formation directly affects the resistivity of the target layer and surrounding rock, leading to the changes of array induction logging responses. Therefore, it is important to understand the effect of formation temperature on the array induction logging response, which is vital for acquiring the formation resistivity more accurately. In this study, the relationship between the formation temperature and formation resistivity is used to simulate the response of the array induction logging under the different formation temperatures and different stratigraphic structures by the Finite element method. The results show that the apparent resistivity of the different coil structure sub-arrays decreases with the increase of the formation temperature, and the declining rate of the apparent resistivity is related to the formation temperature, the coil structure, and the real resistivity. The target layer and surrounding rock resistivity, temperature and thickness of the target layer in the three-step stratum affect the logging response, thus the resistivity curves of each sub-array show a rising shape from the edge of the target layer to the surrounding formation. Through the analysis and study of these response characteristics, combined with the comparison and verification of the Well G1 in the oilfield, the simulation results clearly illustrated the characteristics of the abnormal response of field array induction logging.

Key words: formation temperature, the array induction logging, the finite element method, heavy oil thermal recovery formation