Influence of fracture extension on in-situ stress in tight reservoir

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Zhang, Yongping^1 ; Wei, Xu^2 ; Zhang, Ye^1 ; Xing, Libo^3 ; Xu, Jianjun^2

Oil Production Engineering Research Institute of Daqing Oilfield Company Ltd., Daqing, Heilongjiang Province

163454, China^1

Northeast Petroleum University, Daqing, Heilongjiang Province

163318, China^2

E and D Research Institute of Oilfield Company Ltd., Daqing, Heilongjiang Province

163712, China^3

关键词: Fracture length;    Fracturing construction;    Fracturing process;    Insitu stress;    Reservoir effect;    Tigh treservoirs;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/3/032011/pdf
DOI  :  10.1088/1755-1315/108/3/032011

来源: IOP

【 摘 要 】

Currently, hydraulic fracturing is an important way to develop low permeability reservoirs. The fractures produced during the fracturing process are the main influencing factors of changing in-situ stress. In this paper, the influence of fracture extension on in-situ stress is studied by establishing a mathematical model to describe the relationship between fracture length and in-situ stress. The results show that the growth rate gradually decreases after the fracture reaches a certain length with the increase of fracturing time; the continuous extension of the fracture is the main factor to change the in-situ stress. In order to reduce the impact on the subsequent fracture extension due to the changing of in-situ stress, controlling fracturing time and fracture length without affecting the stimulated reservoir effect is an important way. The results presented in this study can effectively reduce the impact of changing of in-situ stress on subsequent fracturing construction.