Characterization and quantitative evaluation of hydraulic fracture network based on acoustic emission monitoring

Wu，Shan1; Ge，Hongkui2; Wang，Xiaoqiong2; Li，Tiantai3; Gao，Ke4

2021

55th U.S. Rock Mechanics / Geomechanics Symposium 2021

4

Hydraulic fracturing technique is commonly used to enhance the production of tight reservoirs. Generally, the effect of hydraulic fracturing is appraised through true triaxial hydraulic fracturing experiments in laboratory, in which acoustic emission (AE) is often used to monitor the fracturing processes. At present, the number of AE events and the spatial distribution of AE locations are the two main factors considered in the evaluation of fracturing effect. A large number of AE events and a wide spatial distribution of AE locations often indicate a better fracturing effect. However, this regularly employed evaluation approach ignores two important factors, i.e., the connectivity of fractures formed by fracturing, and the property of tensile and shear fractures formed by fracturing. The former directly affects the generation of effective path for production in tight reservoirs, and the latter affects the production by alternating the permeability of fractures. In this paper, we consider the influence of these two factors on fracturing effect by establishing a connected fractures model based on AE data. We compare the results from seven triaxial hydraulic fracturing experiments and find that it is more effective to evaluate the hydraulic fracturing effect by comprehensively considering the connectivity between AE location and the tension-shear property of AE.

第一

英语

EI

20220411498402

Acoustic emission testing ; Fracture ; Hydraulic fracturing ; Location ; Petroleum reservoir engineering ; Rock mechanics ; Shear flow

Surveying:405.3 ; Soils and Soil Mechanics:483.1 ; Petroleum Deposits : Development Operations:512.1.2 ; Fluid Flow, General:631.1 ; Acoustic Properties of Materials:751.2 ; Engineering Graphics:902.1 ; Mathematics:921 ; Materials Science:951

2-s2.0-85123056277

Scopus

1.Southern University of Science and Technology,Shenzhen,China
2.China University of Petroleum (Beijing),Beijing,China
3.Xi'an Shiyou University,Xi'an,China
4.Southern University of Science and Technology,Shenzhen,China

Wu，Shan,Ge，Hongkui,Wang，Xiaoqiong,et al. Characterization and quantitative evaluation of hydraulic fracture network based on acoustic emission monitoring[C],2021.