Study On The Relationship Between Dynamic And Static Parameters Of Rock Mechanics

The mechanical properties of rocks and the in situ stress play an important guiding role in the process of petroleum exploration and development. Therefore, people increasingly pay more attention to the application of rock mechanics in petroleum exploration and development, for rock mechanics not only solving the complex technical issues in oil and gas exploration and development, but also promoting the rapid development of lithomechanics related to oil and gas development. In the field of petroleum exploration and development, through a series of studies on the mechanical properties of rocks, we received the related parameters of rock mechanics. Rock mechanics parameters are divided into dynamic and static mechanical parameters, with differences and relationships between them. Establishing a relationship between dynamic and static rock mechanics parameters to meet the requirements of petroleum engineering rock mechanics parameters is of great significance for oil and gas exploration and development.Therefore, targeting at the core samples from 18 wells of the belly of Jungar basin and Karamay, Dixi, Baikouquan, Shixi oilfield on the edge of Northwest and based on different kinds of core experimental data and log data, this paper studies the relationship between static and dynamic parameters of rock mechanics.This paper determines the mechanical parameters of rocks by core experimentation. Through simulation of temperature and pressure conditions of the strata in the laboratory to do Triaxial rock mechanics experiment on natural cores, we can get static rock mechanics parameters, such as Young’s modulus. Poisson ratio, compressive strength, tensile strength and effective stress coefficient. Rock mechanical parameters that processed by utilizing well-logging data can provide continuous and reliable dynamic rock mechanical parameters and can be got conveniently, economically and reliably. But in practice, such as in drilling engineering, fracturing engineering, the parameters are obtained from the static parameters by calculation. The static mechanics parameters can be a real reflection of rock mechanical properties, so the static parameters are needed. Therefore, the best approach is on the basis of understanding the dynamic and static mechanics parameters, using limited experimental data and a large amount of logging data, to get static and dynamic transformation relationship between parameters of rock mechanics and relationships between rock mechanics parameters.Using data to draw cross-plot of the rock mechanical parameters relationship, and then calculating the relation formulas of the mechanical parameters, through rock mechanical parameter conversion, we established the well-logging calculation formulas of the researching work area, herefrom got the continuous rock mechanical parameter profile of the research well. Thereby, the profile can be applied to other wells of the work area and provide reliable basis for oil and gas exploration and development and the drilling engineering design of the entire Jungar basin interior and the Northwest edge.