Calgary-based Canadian royalty trusts Penn West Energy Trust (NYSE: PWE; Toronto: PWT) and Canetic Resources Trust (NYSE: CNE; Toronto: CNE) plan to merge resulting in a combined value of more than C$15 billion. Pro forma, Penn West production will be approximately 200,000 barrels of oil equivalent per day, comprised of 45% light oil and natural gas liquids, 32% gas and 13% heavy oil. Proved reserves will be 600 million barrels of oil equivalent, and 800 proved plus probable with a reserve life index of 11 years. Undeveloped land includes 4.3 million net acres. The trust will operate approximately 80% of its production.