1887

Abstract

Hydraulic fractures in unconventional reservoir are complex. Surface tilemeter fracture mapping method is used to obtain ground deformation field caused by hydraulic fracture. The observed and theoretical fracture-induced tilt vectors from a best-fit fracture solution are compared and obtain hydraulic fracture orientation and shape. Through analysis of the vertical and horizontal component volume, three new parameters are given to characterize the fracture complexity, i.e. ratio of fluid volume to fracture volume R; volume weight difference rate D and fracture complexity index β. These new parameters are used to explain the mapping result of shale and coal seam reservoir. The results show that R of coal bed and shale is 2.2 and 2.9 while sandstone is only 1.4. β of shale, coal bed and sandstone are 0.7,0.4 and 0.3 respectively, the two new parameters show hydraulic fractures in unconventional reservoir are very complex. The new parameters can describe fracture complexity very well, and results are correlated well with the results of fracturing pressure analysis and other methods of monitoring. This method provides valuable information for optimizing fracturing treatment design and postfrac evaluation in unconventional reservoir.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609-pdb.350.iptc17094
2013-03-26
2020-09-29
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609-pdb.350.iptc17094
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error