Experimental Investigation on Tool-Free Multi-Stage Acid Fracturing of Open-Hole Horizontal Wells by Using Diversion Agents
- Jianye Mou (Shaodan Tao China University of Petroleum-Beijing) | Xuezhi Hui (Seventh Oil Production Plant of Changqing Oilfield of CNPC) | Lei Wang (China University of Petroleum-Beijing, State Key Laboratory of Petroleum Resources and Prospecting) | Shicheng Zhang (China University of Petroleum-Beijing, State Key Laboratory of Petroleum Resources and Prospecting) | Xinfang Ma (China University of Petroleum-Beijing, State Key Laboratory of Petroleum Resources and Prospecting)
- Document ID
- Society of Petroleum Engineers
- SPE International Hydraulic Fracturing Technology Conference and Exhibition, 16-18 October, Muscat, Oman
- Publication Date
- Document Type
- Conference Paper
- 2018. Society of Petroleum Engineers
- 4 Facilities Design, Construction and Operation, 7.2.1 Risk, Uncertainty and Risk Assessment, 7 Management and Information, 2.4 Hydraulic Fracturing, 4.1.2 Separation and Treating, 2.6 Acidizing, 4.1 Processing Systems and Design, 2 Well completion, 2.5.2 Fracturing Materials (Fluids, Proppant), 1.10 Drilling Equipment, 7.2 Risk Management and Decision-Making, 1.10 Drilling Equipment
- open-hole horizontal well, acid fracturing, multi-stage, diversion, experiment
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Multi-stage acid fracturing of horizontal wells is a necessary and effective technology in developing tight carbonates. In open-hole horizontal wells in high-temperature, naturally fractured deep formations, segmentation with tools is of high risk and costly, even ineffective sometimes, so segmentation with diversion agents is alternative to tools and was pilot tested in some fields. The stimulation results were satisfactory, and pressure response feature was in accord with expectation. However, this technique has not been studied experimentally or numerically extensively yet.
In this study, we investigated tool-free multi-stage fracturing experimentally in open-hole horizontal wells with diversion agents. Firstly, we designed a multi-stage tri-axial fracturing system and experimental procedures to satisfy the requirements of diverted fracturing in horizontal wells. Next we conducted a series of experiments to investigate feasibility of multi-stage fracturing with diversion agents using natural carbonate outcrop cubic blocks with the size of 300*300*300mm. CT scanning was used to obtained detailed fracture geometry after experiment. Finally we analyzed the effect of diversion agent type, concentration, and injection procedure on diversion.
The experimental results show that multi-stage fractures perpendicular to the open-hole horizontal wells was created, which verifies the validity of the tool-free multi-stage fracturing of open-hole horizontal wells with diversion agents. Proper agents or combinations can effectively plug the fracture generated previously and generate pressure high enough to initiate another fracture. The breaking pressure or propagation pressure of second fracture was monitored higher than the one of the first fracture. Under experiment conditions, 1-3mm fiber or combination of fiber and particle (0.8-1.2mm) can effectively plug fractures and realize segmentation. Concentration of diversion agents tested ranges 0.4-1.6wt%. Injection procedure for two-stage fracturing was fracturing fluid + diversion fluid + fracturing fluid. The amount of diverter and open-hole length are the vital factor for the success of experiments.
This study newly designed a multi-stage tri-axial fracturing system and experimental procedures for the diverted fracturing. The finding verified the validity of the tool-free multi-stage fracturing of open-hole horizontal wells with diversion agents and provides fundamental for field treatment design.
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Glasbergen, G.Todd, B.L., Van Domelen, M.S., and Glover, M.D. 2006. Design and Field Testing of a Truly Novel Diverting Agent. Society of Petroleum Engineering. Doi: 10.2118/102606-MS
Gomaa, A.M., Nino-Penaloza, A., Castillo, D., MiCartney, E., and Mayor, J. 2016. Experimental Investigation of Particulate Diverter Used to Enhance Fracturing Complexity. SPE-178983-MS presented at the SPE International Conference & Exhibition on Formation Damage Control, Lafayette, Louisiana, USA, 24-26 February.
Gommaa, A.M, Spurr, N., Pirogov, Al., and McCartney, E. 2016. Combining Soluble Particulate Diverter with Specially Engineered Proppant to Enhance Fracture Complexity and Post-Fracture Conductivity. SPE-181486-MS presented at the SPE Annual Technical Conference and Exhibition held in Dubai, UAE, 26-28 September.
Lecampion, B., Desroches, J., Weng, X., Burghardt, J., and Brown, J.E. 2015. Can We Engineer Better Multistage Horizontal Completions? Evidence of the Importance of Near-Wellbore Fracture Geometry from Theory, Lab and Field Experiments. Paper presented at the SPE Hydraulic Fracturing Technology Conference, 3-5 February, The Woodlands, Texas, USA.
Liu, Q., Li, G., Sheng, M., Zhang, Z., Sepehrnoori, K., Guo, Z., and Geng, L. 2018. Fracture Initiation and Propagation Characteristics for Radial Drilling-Fracturing: An Experimental Study. URTEC-2902984-MS presented at SPE/AAPG/SEG Unconventional Resources Technology Conference, 23-25 July, Houston, Texas, USA.
Viswanathan, A., Watkins, H., Reese, J., Corman, Andrew, and Sinosic, B. 2014. Sequenced Fracture Treatment Diversion Enhances Horizontal Well Completions in the Eagle Ford Shale. SPE171660-MS presented at the SPE/CSUR Unconventional Resources Conference - Canada held in Calgary, Alberta, Canada, 30 September - 2 October.
Williams, V., McCartney, E., and Nino-Penaloze A., 2016. Far-Field Diversion in Hydraulic Fracturing and Acid Fracturing: Using Solid Particulates to Improve Stimulation Efficiency. SPE-181845-MS presented at the SPE Asia Pacific Hydraulic Fracturing Conference and Conference held in Beijing, China, 24-26 August.