Nitrogen Oil and Gas!29 Jun 2018 11:17
Enhanced Unconventional Oil and Gas Production with Nitrogen Fracturing
The design and selection of well stimulation fluids, known as fracturing fluids, play a major role in improving well completion economics because an effective fracturing fluid can significantly enhance hydrocarbon production rates. Another challenge faced by operators is that the harvesting of most of the known unconventional oil and gas resources is not yet commercially viable; hence, significant technological advancements in well stimulations methods will be required to facilitate the production of increasingly challenging reservoirs.
1.Nitrogen Gas Fracturing.
2.Nitrogen Foam Fracturing.
3.Nitrogen Energized Fracturing.
4.Enhanced Oil Recovery.
1. Devonian Big Sandy Play
Located in the Appalachian Basin, the Devonian shale gas play includes several formations such as the Lower Huron, Cleveland, and Rhinestreet, which are located in Kentucky, Virginia, and West Virginia. Evaluating the characteristics of the Devonian shale rock reveals that it has low permeability, low porosity, high water sensitivity, and a high proportion of natural fractures. Due to these characteristics, nitrogen fracturing has been the most commonly used well stimulation method since 1978.
2. The Montney shale
The Montney shale gas play is located in the Western Canada Sedimentary Basin spanning a total area of 2,961 km2, where it is of great importance to the Canadian natural gas supply. Much of the Montney play is characterized by unconventional formations that can be adversely affected by slickwater fracturing, thereby lowering the production rate of the well. Therefore, many operators within the Montney formation use carbon dioxide and nitrogen fracturing solutions.
3. Coal bed Methan.
Nitrogen fracturing fluids are widely used for hydraulic fracturing and enhanced coal bed methane recovery across coal bed methane plays in North America.
4. Simulation and Design of Energized Hydraulic Fractures
In North America, energized fracturing is extensively used for stimulating depleted tight gas formations. Friehauf & Sharma developed a simulation model for energized hydraulic fractures to determine when energized fracturing is beneficial for tight gas recovery.