射孔參數(shù)對致密油壓裂效果影響
[Abstract]:The theoretical and technological research on volume fracturing of tight oil reservoir has become a hot issue in oil and gas industry. Perforation is a key channel to connect wellbore, formation and fracture, which provides fracturing power for volume fracturing. Perforation parameter is one of the important factors to control formation initiation near wellbore and affect subsequent hydraulic fracturing. The study of the effect of perforation parameters on the fracturing effect of compact oil is an important forerunner to promote the study of compact oil volume fracturing technology. In this paper, the effects of perforation parameters / process on fracture initiation, propagation and fracture morphology near wellbore are studied by means of numerical simulation and physical model experiment. The main contents are as follows: 1. The basic correlation mechanism of perforation-volume fracturing is discussed. The relationship between perforation and volume fracturing is deepened. 2. The geomechanical models of vertical well and horizontal well are established, and the influence of perforation parameters on the initiation pressure and location is quantitatively analyzed by using finite element numerical simulation method. The relationship between perforation and fracturing fracture morphology (vertical fracture, horizontal fracture, double fracture, multiple fracture, volume fracture, etc.) is studied. 3. Based on fracture mechanics, a fracture stress coupled mechanical model is established, and perforation parameters are analyzed. The influence of fracturing dynamics and formation properties on fracture propagation trajectory. As initial fracture treatment, perforation is closely related to fracture propagation. 4. Physical simulation and numerical simulation are carried out to study the effect of perforation on volume fracturing. The results show that the fractures produced by the fixed plane perforation are still perpendicular to the direction of the minimum principal stress, but the relatively tortuous and complex fractures along the perforation direction increase the fracture complexity. Will produce certain contribution to the vertical well volume fracturing.
【學位授予單位】:中國石油大學(華東)
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:TE357
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