Performance Evaluation of First Horizontal Well Implementation in Tight Carbonate Reservoir Yields Critical Results in Western Desert, Egypt
- Mohamed Salah (Khalda Petroleum Company) | Ahmed Bereak (Khalda Petroleum Company) | M. A. Gabry (Khalda Petroleum Company) | M. Gallab (Khalda Petroleum Company) | S. I. Abdel Fattah (Khalda Petroleum Company)
- Document ID
- Society of Petroleum Engineers
- SPE North Africa Technical Conference and Exhibition, 14-16 September, Cairo, Egypt
- Publication Date
- Document Type
- Conference Paper
- 2015. Society of Petroleum Engineers
- 5.8.7 Carbonate Reservoir, 3.2.4 Acidising, 3 Production and Well Operations, 2 Well completion, 3 Production and Well Operations, 2.5 Hydraulic Fracturing, 7.2.1 Risk, Uncertainty and Risk Assessment, 7.2 Risk Management and Decision-Making, 1.6 Drilling Operations, 7 Management and Information, 3.2 Well Operations, Optimization and Stimulation, 1.6.6 Directional Drilling, 1.6.9 Coring, Fishing
- Open Hole Horizontal wells, Matrix Acidizing, Tight carbonate
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- 186 since 2007
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Abu Roash-D (AR-D) is a common carbonate reservoir in Abu Gharadig (AG) field, Western Desert of Egypt. It is characterized as a limestone reservoir which has good lateral continuity, contains natural fractures with poor connectivity in addition to formation tightness. The heterogeneity and tightness of AR-D reservoir are the main challenges to maintain economical well productivity.
Initially, Several vertical wells had been drilled in AR-D reservoir and stimulated via matrix acidizing, but could not achieve or sustain the economical target production rates. Recently, two vertical wells were acid fractured as a trial to produce conductive fracture with sufficient length to allow more effective drainage around the wellbore, but test results showed higher flash production of 3,000 BOPD then rapid decline and low recovery occurred. This awesome results encourage embarking on field development and additional production data gathering for development optimization. The large interest in developing such low permeability reservoirs has been a direct result of the favorable economics achieved by the advancements in horizontal well drilling and stimulation technologies hold great promise to increase production by dramatically increasing the contact area with the producing interval, maximizing the drainage volume around a well and link those natural fractures network.
So, In order to economically develop AR-D reservoir resources a comprehensive parametric study was conducted on low permeability AR-D reservoir of western desert (through gathering of additional data during the development a major reservoir, the review of the core and test permeability data across the reservoir as well an evaluation of the uncertainties and associated development risks) has documented some critical results, showing the productivity index ratio between stimulated vertical and horizontal wells illustrates the improvement to be obtained from higher reservoir contact.
This paper takes a multidisciplinary approach to better understand how to enhance the productivity of low permeability AR-D reservoir in Western desert of Egypt through a detailed analysis of well performances and exploitation approaches after the successful Implementation of horizontal wells to maximize drainage volume around the well to revive low producing wells due to reservoir tightness and discuss the actual performance of the horizontal wells and compares them with the offset conventional vertical wells and highlights the productivity gain.
|File Size||7 MB||Number of Pages||25|
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