Channel fracturing method with alternative injection of conventional and capsule-type soluble proppants
The present invention relates to a channel fracturing method with alternative injection of conventional and capsule-type soluble proppants. The method includes the following steps: injecting pad fluid into a wellbore to break a formation and form fractures in the formation; alternately injecting a sand-carrying fluid containing conventional proppant and a sand-carrying fluid containing capsule-type soluble proppant into the wellbore in sequence to support fractures in the formation and continue to fracture the formation; injecting displacement fluid into the wellbore to completely displace the sand-carrying fluids in the wellbore into the fractures. The conventional proppant of less dosage is used. The capsule-type soluble proppant is less difficult to be developed and its solubility is sensitive to the fracture closure, which is conducive to the quick flowback after fracturing. The channel fracturing technology is more mature, reliable, and cost-effective, and the concept of forming high-conductivity channel is more simple and effective.
SOUTHWEST PETROLEUM UNIVERSITY
E C C C C
E21B C09K C09K C09K C09K
inventional inventional inventional inventional inventional
Yan Bo Jing Zhibin Yongming Wang Ang Youshi
Kou Chen Jia He Li Tang Luo Jiang