The Study of the Unstable Fracure Propagation in the Injection Well: Numerical and Laboratory Modeling

Abstract

In the article the results of laboratory studies on unstable fracture propagation in injection well are presented alongside with the verification of previously proposed model [Тримонова, Дубиня] verification using the results of experimental studies. The experimental studies were carried out in accordance with the similarity criterion between the experimentally studied material and the rock properties under the in-situ state. The similarity criterion was chaosen according to the possibilitiesof the experimental complex. The joint study of the possibilities of the experimental complex, mathematical model and similarity theory makes a basis for the application of mathematical model of water-induced hydraulic fracture propagation while modeling the reservoir exploitation process.

Experimental Study of the Hydraulic Fracture Formation and Propagation

“…Detailed information about determining the properties of the material used and the assessment of similarity criteria for the experiments carried out can be found in Ref. [17].…”

Study of the Interaction of a Hydraulic Fracture with a Natural Fracture in Laboratory Experiment Based on Ultrasonic Transmission Monitoring

“…The main experiments were carried out on a triaxial loading unit developed at IDG RAS and described in detail in several publications [12,14,15]. A brief description of the installation is given below.…”

“…The permeability of the model material was 1.1•10 -15 m 2 . The issues of similarity and adequacy of the model material used and experimental parameters in relation to hydraulic fracturing in the field were considered in [14,15].…”

“…The samples have the shape of disks with a diameter of 430 mm and a height of 72 mm; the installation allows the sample loading along three independent axes, creating pore pressure gradients, measuring the fluid pore pressure at several points, registering acoustic emission, probing the sample with ultrasonic pulses. Several results of experiments conducted at this facility are given in publications [12][13][14][15].…”

Issledovanie neobkhodimosti opredeleniya treshchinostoykosti gornoy porody pri modelirovanii gidrorazryva plasta

“…Согласно известным внешним граничным условиям и принятой модели гидроразрыва, рассчитывалась математическая модель каждого эксперимента [2,3]. Лабораторное исследование трещиностойкости выполнялось для модельного материала с помощью методов наноиндентирования [4,5]. Это позволило внести данный параметр в критерий распространения трещины гидроразрыва, уточненный для случая пороупругой среды, и существенно повысить достоверность результатов численного моделирования.…”