Production Optimization: Horizontal Well Analysis Performance
- 2. • What is horizontal wells • History of horizontal wells • Classification of horizontal wells • Application of horizontal wells • Horizontal wells compare to vertical wells • Horizontal well costs • Economic failure in horizontal wells • Future of horizontal wells
- 3. By oilfield convention, a horizontal well is defined as a well with an inclination angle of 90 degrees from the vertical. A vertical well is one with zero inclination angle.
- 4. • Some of the early horizontal well efforts date back to 1930. • In the late 70’s and early 80’s, with oil prices around $35 a barrel, interest in horizontal wells was reignited.
- 5. The purpose of the horizontal wells was to: • enhance well productivity, • reduce water and gas coning, • intersect natural fractures and to • improve well economics.
- 6. 1. Short-Radius 2. Medium-Radius 3. Long-Radius Horizontal wells are normally characterized by their buildup rates and are broadly classified into three groups:
- 7. The table below illustrated classification of horizontal wells according to their Build Rate.
- 8. A) Hit targets that cannot be reached by vertical drilling. B) Drain a broad area from a single drilling pad. C) Increase the length of the "pay zone" within the target rock unit.
- 9. D) Improve the productivity of wells in a fractured reservoir. E) Seal or relieve pressure in an "out- of-control" well. F) Install underground utilities where excavation is not possible.
- 10. To produce the same amount of oil, one needs fewer horizontal wells as compared to vertical wells. This results in reduced need for surface pipelines, locations, etc.
- 11. • Higher rates and reserves as compared to vertical wells. This results in less finding cost and less operating cost per barrel of oil produced. • vertical well operating costs are $7 to $9 per barrel of oil, the horizontal well operating costs are $3 to $4 per barrel.
- 12. • The costs of horizontal well installation varies greatly depending on many site-specific factors. • with estimates from $5,000 to $850,000 per well • Price per foot estimates range from $25 to $85 and per day from $1,500 to $15,000.
- 13. • Horizontal wells cost is greater than vertical wells about 2.5 to 3 times, so you have a high risk of economic failure. • Eliminate the risk and drill vertical wells.
- 14. Modern methods allow the drilling of several thousand meters of horizontal sections, thereby increasing access to the edges of the reservoir and achieving higher recovery with fewer wells.
- 16. • Petroleum Production Engineering, A Computer-Assisted Approach by Boyun Guo, PH.D. , William C. Lyons, PH.D. and Ali Ghalambor, PH.D. • Horizontal Wells by Ralinda R. Miller, P.G. • Cost/Benefits of Horizontal Wells by S. D. Joshi, SPE, Joshi Technologies International. • A Review of Horizontal Well Technology and Its Domestic Applications by Diane W. Lique. • Horizontal Wells-Subsurface Contaminats Focus Area • http://www.fuelsnews.com/low-oil-decimates-rig-count- producers-hold-hope/
- 17. • http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3866387/ • http://www.oges.info/3287/horizontal-well • http://www.ogj.com/articles/print/volume-93/issue- 25/in-this-issue/pipeline/survey-shows-successes- failures-of-horizontal-wells.html • http://geology.com/articles/horizontal-drilling/