Study On Rock Mechanics Characteristics And Fracture Propagation Law Of Sandstone Reservoir In H Area

Sandstone reservoir is an important reservoir type for land oil and gas exploration in my country,and it is a relatively common type of oil and gas exploration in my country.Simultaneously,it is also one of the most representative oil reservoirs in my country.Therefore,it is very important to study the general sandstone reservoir from the whole process.The article adopts the study of reservoir characteristics in H area,rock mechanics parameter test experiment and sandstone fracturing fracture morphology physical simulation experiment.Then connect with the theoretical basis of the formation of a complex fracture network when the sandstone reservoir is fractured,analyze the propagation of fractures in the reservoir,use numerical simulation for further analysis.This article includes indoor physical experiment simulation research and software digital simulation research,in the indoor physical simulation experiment,the physical simulation experiment of sandstone fracturing fracture morphology and the numerical simulation study of sandstone reservoir fracture initiation and propagation are the main parts.In this paper,indoor conventional triaxial tests,ground stress tests,fracture toughness tests,and brittleness index evaluation tests were carried out on the cores of sandstone reservoirs in H area.Various basic data of rock mechanics parameters have been obtained through various sets of tests,incorporate the Young's modulus,Poisson's ratio,compressive strength,in-situ stress,fracture toughness value and brittleness index of different well depths.Perform hydraulic fracturing physical simulation on the initiation and propagation of cracks,and simulate the shape of the cracks when the rock cracks after the water pressure passes through the rock and study its rules.Numerical simulation is partly based on ABAQUS software in hydraulic fracturing,Moreover,the influence of the geological coefficient of the underground layer on the expansion of the uniform distribution and the influence of the stress difference and thickness difference of the underground layer on the sequence and extension of the uniform distribution of sandstone are simulated,owing to the pressing crack fluid viscosity and displacement caused by the different construction seam of the intricacy of the internet issue.So as to test the feasibility of the experiment,thesis research the diversion of the hydraulic fracture when it meets the natural fracture in the formation.The hydraulic fracturing mechanism of sandstone reservoirs is clarified through the results of physical and numerical simulations.The initiation characteristics of fractures in H area,It is proposed that the fracture morphology has a tendency to change to complex fractures under high displacement rate,and it is suggested that the reservoir reconstruction should adopt the idea of large displacement rate and large fluid volume.In the sandstone oil reservoir to enhance the recovery of technical theory,scheme optimization to provide a powerful proposal for the actual field.