Is That Interference? A Work Flow for Identifying and Analyzing Communication Through Hydraulic Fractures in a Multiwell Pad
- Ali Awada (IHS) | Martin Santo (IHS) | Dylan Lougheed (IHS) | Don Xu (IHS) | Claudio Virues (CNOOC Nexen)
- Document ID
- Society of Petroleum Engineers
- SPE Journal
- Publication Date
- October 2016
- Document Type
- Journal Paper
- 1,554 - 1,566
- 2016.Society of Petroleum Engineers
- Interference, Pressure transient analysis, Data diagnostics, Production analysis
- 9 in the last 30 days
- 676 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 10.00|
|SPE Non-Member Price:||USD 30.00|
The topic of interwell communication in unconventional reservoirs has received significant attention because it has direct implications for well-spacing considerations. However, it has been the observation of the authors that interference is often inferred without direct evidence of its occurrence, or without an understanding of the various mechanisms of interference. Some common discussions on interference among engineers refer to fracture “hits” and fracture-fluid production that suddenly appears at offset producing wells. These are indications of communication, but do not necessarily imply that a strong connection will be maintained throughout the life of the wells.
This paper presents a rigorous procedure for correctly identifying interference by use of data acquired during a typical multiwell-pad-production scheme. First, the various mechanisms of interference are defined. Next, analytical simulations are run to reveal the expected behavior for interference through fractures and reservoir matrix. Data provided from an eight-well pad in the Horn River basin are then scoured, revealing evidence of interference between at least two wells. Through this exercise, a procedure is developed for identifying interference by searching for changes in buildup trends while wells are staggered on/off production. Finally, the data are history matched with numerical models to confirm the interference mechanism.
The procedure in this paper is designed to help production analysts diagnose interference and avoid common pitfalls. The work flow is generalized and can be applied to other multiwell-pad completions.
|File Size||2 MB||Number of Pages||13|
Ajani, A. A. and Kelkar, M. G. 2012. Interference Study in Shale Plays. Presented at the SPE Hydraulic Fracturing Technology Conference, The Woodlands, Texas, 6–8 February. SPE-151045-MS. http://dx.doi.org/10.2118/151045-MS.
Anderson, D. M., Turco, F., Virues, C. J. J. et al. 2013. Application of Rate Transient Analysis Workflow in Unconventional Reservoirs: Horn River Shale Gas Case Study. Presented at the SPE Unconventional Resources Conference and Exhibition-Asia Pacific, Brisbane, Australia, 11–13 November. SPE-167042-MS. http://dx.doi.org/10.2118/167042-MS.
Barker, J. 2014. Horn River Basin Unconventional Shale Gas Play Atlas. BC Oil and Gas Commission, June 2014, http://www.bcogc.ca/node/11238/download (accessed 12 February 2015).
Earlougher, R. C. and Ramey, H. J. 1973. Interference Analysis In Bounded Systems. J Can Pet Technol 12 (4): 33–45. PETSOC-73-04-04. http://dx.doi.org/10.2118/73-04-04.
Gringarten, A. C., Ramey, H. J. Jr., and Raghavan, R. 1974. Unsteady-State Pressure Distributions Created by a Well With a Single Infinite-Conductivity Vertical Fracture. SPE J. 14 (4): 347–360. SPE-4051-PA. http://dx.doi.org/10.2118/4051-PA.
Kamal, M. M. 1983. Interference and Pulse Testing-A Review. J Pet Technol 35 (12): 2257–2270. SPE-10042-PA. http://dx.doi.org/10.2118/10042-PA.
Merkle, S., Lehmann, J., and Pyecroft, J. 2013. Field Trial of a Cased Uncemented Multi-Fractured Horizontal Well in the Horn River. Presented at the Unconventional Resources Technology Conference, Denver, 12–14 August. http://dx.doi.org/10.1190/URTEC2013-138.
Potocki, D. J. 2012. Understanding Induced Fracture Complexity in Different Geological Settings Using DFIT Net Fracture Pressure. Presented at the SPE Canadian Unconventional Resources Conference, Calgary, 30 October–1 November. SPE-162814-MS. http://dx.doi.org/10.2118/162814-MS.
Sardinha, C. M., Petr, C., Lehmann, J. et al. 2014. Determining Interwell Connectivity and Reservoir Complexity Through Frac Pressure Hits and Production Interference Analysis. Presented at the SPE/CSUR Unconventional Resources Conference–Canada, Calgary, 30 September–2 October. SPE-171628-MS. https://dx.doi.org/10.2118/171628-MS.
Thompson, L. G., Manrique, J. L., and Jelmert, T. A. 1991. Efficient Algorithms for Computing the Bounded Reservoir Horizontal Well Pressure Response. Presented at the Low Permeability Reservoirs Symposium, Denver, 15–17 April. SPE-21827-MS. http://dx.doi.org/10.2118/21827-MS.