Production Performance of Infill Horizontal Wells vs. Pre-Existing Wells in the Major US Unconventional Basins
- G. Lindsay (Schlumberger) | G. Miller (Schlumberger) | T. Xu (Schlumberger) | D. Shan (Schlumberger) | J. Baihly (Schlumberger)
- Document ID
- Society of Petroleum Engineers
- SPE Hydraulic Fracturing Technology Conference and Exhibition, 23-25 January, The Woodlands, Texas, USA
- Publication Date
- Document Type
- Conference Paper
- 2018. Society of Petroleum Engineers
- 2.5.2 Fracturing Materials (Fluids, Proppant), 1.6 Drilling Operations, 2.4 Hydraulic Fracturing, 1.6.6 Directional Drilling, 2 Well completion
- Infill development, horizontal hydraulic fracturing, well production performance, unconventional shale
- 41 in the last 30 days
- 1,936 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 8.50|
|SPE Non-Member Price:||USD 25.00|
In most US unconventional basins, operators often start development by drilling the minimum number of wells needed to hold their acreage. These initial wells are sometimes called "parent" wells. Operators then start drilling their infill development wells, which many operators are currently in the process of doing across various unconventional basins. Infill performance can be highly variable, with operators making great efforts to ensure infill wells perform comparable to or better than existing parent wells. This challenge will become more magnified in the unconventional industry as infill development surpasses parent well drilling. To add more uncertainty, limited research exists showing basin-wide trends as to how infill wells can be expected to perform on average in comparison to their parent well counterparts. We studied infill well performance in numerous US basins, with the objectives of understanding performance trends and their causes, along with providing recommendations for maximizing infill well potential.
We evaluated the performance of newly drilled infill wells compared to their parent wells, which had been produced for some time. With publicly available production and well information, an evaluation was performed for the following major unconventional basins: Bakken/Three Forks, Barnett, Bone Springs, Eagle Ford, Fayetteville, Haynesville, Marcellus, Niobrara, Wolfcamp (Midland and Delaware Basins), and Woodford.
Using a spatial, statistical approach with key production indicators, we identified key trends across the various basins where the infill wells produced at different production rates compared to their parent wells. Overall, there is about a 50% chance that a child well will outperform a parent well; However, normalizing production to total proppant pumped and lateral length suggests that larger volumes with longer laterals in infill wells may be needed to achieve similar rates to the parent wells.
Underperformance of infill wells may likely be because of existing depletion and inter-well production competition with both parent and other infill wells. Additionally, in areas where significant depletion is expected, predicting the performance of new infill wells can be very difficult. This paper will discuss alternative methodologies and technologies that may help understand and increase the production potential of lower performing infill wells.
|File Size||2 MB||Number of Pages||28|
EOG. 2016. 3Q Results Presentation. Investor Relations, http://investors.eogresources.com/Presentations-and-Events (accessed October 2017).
Gakhar, K., Shan, D., Rodionov, Y.et al. 2016. Engineered Approach for Multi-Well Pad Development in Eagle Ford Shale. Presented at the Unconventional Resources Technology Conference, San Antonio, Texas, USA. 1&-3 August. URTEC 2431182- MS. https://doi.org/10.15530/URTEC-2016-2431182.
Gakhar, K.Rodionov, Y., Defeu, C.et al. 2017. Engineering an Effective Completion and Stimulation Strategy for In-Fill Wells. Presented at the SPE Hydraulic Fracturing Technology Conference and Exhibition, The Woodlands, Texas, USA, 24&-26 January. SPE-184835-MS. https://doi.org/10.2118/184835-MS.
Guan, L., McVay, D.A.,Jensen, J.L.et al. 2002. Evaluation of a Statistical Infill Candidate Selection Technique. Presented at the SPE Gas Technology Symposium, Calgary, Alberta, Canada, 30 April&-2 May. SPE-75718-MS. https://doi.org/10.2118/75718-MS.
Hoffman, T.B. and Evans J.G. 2016. Improved Oil Recovery IOR Pilot Projects in the Bakken Formation. Presented at the SPE Low Perm Symposium, Denver, Colorado, USA, 5&-6 May. SPE-180270-MS. https//doi.org/10.2118/180270-MS.
Hudson, J.W., Jochen, J.E., and Jochen, V.A. 2000. Practical Technique To Identify Infill Potential in Low-Permeability Gas Reservoirs Applied to the Milk River Formation in Canada. Presented at the SPE/CERI Gas Technology Symposium, Calgary, Alberta, Canada, 3&-5 May. SPE-59779-MS. https://doi.org/10.2118/59779-MS.
Hudson, J.W., Jochen, J.E., and Spivey, J.P. 2001. Practical Methods to High-Grade Infill Opportunities Applied to the Mesaverde, Morrow, and Cotton Valley Formations. Presented at the SPE Hydrocarbon Economics and Evaluation Symposium, Dallas, Texas, USA, 2&-3 April. SPE-68598-MS. https://doi.org/10.2118/68598-MS.
IHS Enerdeq. 2017. Enerdeq. IHS Energy public production information database, https://penerdeq.ihsenergy.com/thin2/secure/home/home.jsf (downloaded August 2017).
Kyte, D.G. and Meehan D.N. 1996. Horizontal Spacing, Depletion, and Infill Potential in the Austin Chalk. Presented at the SPE Annual Technical Conference and Exhibition, Denver, Colorado, USA, 6&-9 October. SPE-36721-MS. https://doi.org/10.2118/36721-MS.
Lindsay, G. J., White, D. J., Miller, G. A.et al. 2016. Understanding the Applicability and Economic Viability of Refracturing Horizontal Wells in Unconventional Plays. Presented at the SPE Hydraulic Fracturing Technology Conference, The Woodlands, Texas, USA, 9&-11 February. SPE-179113-MS. http://dx.doi.org/10.2118/179113-MS.
Marongiu-Porcu, M., Lee, D., Shan, D.et al. 2015. Advanced Modeling of Interwell Fracturing Interference: An Eagle Ford Shale Oil Study. Presented at the SPE Annual Technical Conference and Exhibition, Houston, Texas, USA, 28&-30 September. SPE-174902-MS. http://dx.doi.org/10.2118/174902-MS.
McCain, W.D., Voneiff, G.W.,Hunt, E.R.et al. 1993. A Tight Gas Field Study: Carthage (Cotton Valley) Field. Presented at the SPE Gas Technology Symposium, Calgary, Alberta, Canada, 28&-30 June. SPE-26141-MS. https://doi.org/10.2118/26141-MS.
McFall, R.Mullen, K., Baihly, J.et al. 2017. Refracturing in the Eagle Ford Shale: On Operator's Quest to Identify and Rank Candidates, Minimize Well Interference, and Understand Variability in Results. Presented at the Unconventional Resources Technology Conference, Austin, Texas, USA, 24&-26 July. URTEC-2691375-MS.
Miller, G., Lindsay, G., Baihly, J.et al. 2016. Parent Well Refracturing: Economic Safety Nets in an Uneconomic Market. Presented at the SPE Low Perm Symposium, Denver, Colorado, USA, 5&-6 May. SPE-180200-MS. http://dx.doi.org/10.2118/180200-MS.
Morales, A., Zhang, K., Gakhar, K.et al. 2016. Advanced Modeling of Interwell Fracturing Interference: An Eagle Ford Shale Oil Study - Refracturing. Presented at the SPE Hydraulic Fracturing Technology Conference, The Woodlands, Texas, USA, 9&-11 February. SPE-179177-MS. http://dx.doi.org/10.2118/179177-MS.
Oussoltsev, D., Butula, K. K., Klyubin, A.et al. 2008. Fiber-Based Fracture Fluid Technology a First for Oil Reservoirs in Western Siberia. Presented at SPE International Symposium and Exhibition on Formation Damage Control, 13&-15 February, Lafayette, Louisiana, USA, 13&-15 February. SPE-112438-MS. https://doi.org/10.2118/112438-MS.
Roussel, N.P., Florez, H.A., and Rodriguez, A.A. 2013. Hydraulic Fracture Propagation from Infill Horizontal Wells. Presented at the SPE Annual Technical Conference and Exhibition, New Orleans, Louisiana, USA, 30 September&-2 October. SPE 166503. https://doi.org/10.2118/166503-MS.
Salah, M., Gabry, M., ElSebaee, M., Mohamed, N. 2016. Control of Hydraulic Fracture Height Growth Above Water Zone by Inducing Artificial Barrier in Western Desert, Egypt. Presented at the Abu Dhabi International Petroleum Exhibition & Conference, 7&-10 November, Abu Dhabi, UAE. SPE-183040-MS. https://doi.org/10.2118/183040-MS.
Voneiff, G.W. and Cipolla, C. A. 1996. New Approach to Large-Scale Infill Evaluations Applied to the OZONA (Canyon) Gas Sands. Presented at the Permian Basin Oil & Gas Recovery Conference, Midland, Texas, USA, 27&-29 March. SPE-35203-MS. https://doi.org/10.2118/35203-MS.
Yudin, A., Butula, K., Novikov, Y., 2007. A Novel Approach to Fracturing Height Control Enlarges the Candidate Pool in the Ryabchyk Formation of West Siberia's Mature Oil Fields. Presented at the European Formation Damage Conference, Scheveningen, The Netherlands, 30 May&-01 June. SPE-107604-MS. https://doi.org/10.2118/107604-MS.