Simulation Study On Fracture Path And Influencing Factors Of Tight Glutenite Reservoir

With the exploitation of conventional oil and gas resources exhausted,unconventional oil and gas resources will be an important part of the energy structure of human society.Hydraulic fracturing reservoir simulation technology is the key link in the exploitation process of unconventional oil and gas resources.For this reason,some experts and scholars have put forward a series of evaluation indexes for the hydraulic fracturing simulation of shale in North America.However,in China,the exploitation of tight glutenite reservoir is mainly focused on.Due to the different properties of tight glutenite and shale,the evaluation indexes proposed for the hydraulic fracturing of shale in North America are not fully applicable to the simulation of tight glutenite reservoir in China.Therefore,it is of great significance to evaluate and study the effect of hydraulic fracturing in tight glutenite reservoir in China.In this paper,aiming at the simulation of tight glutenite reservoir by hydraulic fracturing,the following research work is mainly carried out based on numerical simulation method and on-site micro-seismic monitoring.First,based on the engineering background of a tight glutenite reservoir development in the Fuxing depression area,Dongying depression,according to the empirical formula put forward by the relevant researchers,the rock mechanical parameters of the reservoir are predicted based on the well logging data and the indoor mechanical experiment,and the rock strength parameters of the reservoir and the upper and lower dry layers are modified according to the new generalized Hoek-Brown rock mass strength criterion.Secondly,according to the construction situation in the process of hydraulic fracturing,combined with the predicted mechanical parameters,the three-dimensional numerical modeling of the glutenite reservoir is completed in RFPA3D-Flow numerical simulation software,according to the new generalized Hoek-Brown rock mass strength criterion,the rock mass strength of the glutenite reservoir and the barrier is reduced.Based on the micro-seismic monitoring results in the process of hydraulic fracturing,the calculation results of numerical model is compared and evaluated.Thirdly,according to the characteristics of fracture network formed in volume fracturing transformation of tight glutenite reservoir,combined with the drainage radius of tight glutenite reservoir,the concept of hydraulic fracture control volume is put forward,and the influence of geo-stress factors,reservoir physical parameters and construction parameters on hydraulic fracture control volume is analyzed.Finally,according to the main influencing factors of hydraulic fracture oil control volume,this paper analyzes the interaction effect,finds out whether there is interaction effect among the main influencing factors,and analyzes the relationship formula between the hydraulic fracture oil control volume and the main influencing factors.It is hoped that the work of this paper can provide some guidance for the volume fracturing of glutenite,and provide reference for later scientific research.