The Research on the Model of the Multi-Interval Fracturing of Horizontal Wells

AI Chi, YU Jian, LIU Yazhen, LI Shuang

Abstract


Multi-interval fracturing technology in horizontal well are used more and more widely in the exploitation of unconventional hydrocarbon resources, to accurately determine the initiation pressure having an important significance to improve the fracturing effect. On the basis of the homogeneous and isotropic two-dimensional plane strain model, established the geometric model of two-dimensional vertical fractures induced stress field; Based on rock mechanics and elastic mechanics theory, taking multi-stage fracturing induced stress into consideration, established the calculation model of the initiation pressure of the multi-stage fracturing of horizontal wells’ fracture. The calculation results showed that taking induced stress into consideration, the calculation result is consistent with the actual situation, compared with the actual construction pressure, and the average accuracy rate is 95.15%. It proved that this model can be used for calculating the initiation pressure of the multi-interval fracturing of horizontal wells’ fracture.
Key words: Horizontal well; Multistage fracture; Initiation pressure; Induced stress

Keywords


Horizontal well; Multistage fracture; Initiation pressure; Induced stress

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References


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DOI: http://dx.doi.org/10.3968/j.aped.1925543820140701.1863

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