Volume 51

Study on the interference law of inter-well fracturing and prevention of interference by fracture-opening temporary plugging fracturing Qing Wang, Xinfang Ma, Junjie Li, Yang Liu, He Ma

Abstract

In the Xinjiang Mahu tight sandstone reservoir, the phenomenon of fracturing interference between newly fractured wells and fractured horizontal wells is increasing. Fracturing interference has a significant impact on the production of the affected wells, including oil production, water production, and production oil pressure. There are two types of fracturing interference in horizontal wells in Xinjiang Mahu Oilfield: fracture communication interference and pressure wave interference. The changes in liquid production volume and production oil pressure vary for different types of fracturing interference. Based on the production data from different types of interfered wells in Mahu Oilfield, this study analyzed the changes in liquid production and oil pressure after interference, explored the effects of different types of interference on these wells, and finally provided methods to prevent fracturing interference. The results show that: (1) Production wells experience severe interference due to fracture communication; after interference, there is a significant shift in liquid production volume with an increase in water production and noticeable fluctuation in production oil pressure. (2) Production wells experience weak interference due to fracture communication; after interference, there are slight changes in liquid production volume with a small increase in water production but no obvious fluctuation in production oil pressure. (3) By adopting fracture-opening temporary plugging fracturing technology, it is possible to control the liquid volume of individual clusters and reduce the possibility of dominant fractures expanding further away. This has an evident effect on preventing fracturing interference.

Keywords Fracturing interference, fracture communication, interference prevention, temporary plugging fracturing