Computer modeling of gas shale reservoirs basing on dynamic mechanical characteristics - A Case Study of Well No. 202 in Weiyuan Area of Sichuan Basin

Abstract

Abstract Global shale oil and gas resources are very rich, are becoming an important supplement to conventional oil and gas. However, due to strong plasticity, strong reservoir stress sensitivity and poor stability, easy burst collapse, rupture, card Drilling or well leakage and other phenomena, restricting the development of shale oil and gas resources. In order to improve the safety and efficiency of the shale formation drilling project, This paper uses the rock physics, logging, geology and other disciplines as the theoretical guidance, using the dynamic model to build the method, and the No. 202 well logging data and related research results as an example, the prediction, verification and evaluation of rock mechanics parameters, in-situ stress, wellbore stability and compressibility of the shale formation were carried out respectively. The results show that the rock mechanics model provides the key information for the construction of hydraulic fracturing engineering. There are significant wall collapse phenomena in the well sections of the Well No. 202, and there are significant differences in the maximum and minimum horizontal principal stresses at specific parts. The results of this study are of great significance to the follow-up of shale reservoirs and the design of late fracturing.