China National Petroleum Corp and Sinopec, China’s top two state-owned oil companies, have denied they are considering merging to form a giant monopoly after rumours prompted both companies’ Hong Kong-listed shares to jump on Monday.

OAO Gazprom says antitrust allegations by the European Commission regarding territorial restrictions and an unfair pricing policy are “unsubstantiated.”

If there was one thing guaranteed to follow low oil prices (other than the loss of thousands of jobs) it was mergers and acquisitions. This has certainly rung true as companies consolidate their portfolios or use their war chests to snap up competitors while prices are down. The recent deal between Royal Dutch Shell and BG Group has many expecting a renewed wave of major business decisions. The buzz has fueled rumors that BP Plc will be susceptible to a takeover by fellow oil giant Exxon Mobil Corp.

Total said it may take advantage of the slump in crude to make acquisitions that build on the strengths of Europe’s third-biggest oil company in deepwater offshore fields and liquefied natural gas (LNG).

The European Commission gave Gazprom 12 weeks to answer its Statement of Objections (SO) for alleged abuse of dominant market position in Central and Eastern European gas markets. The widely-anticipated decision triggered the enthusiasm of Ukrainian officials, raised some doubts among Russian experts and encountered strong opposition from Gazprom.

In the latest report on Croatia, the European Commission has warned that Croatian Law on the gas market does not encourage competition, and that such a situation could jeopardize further integration into the European energy market, as well as projects such as the LNG terminal on the island of Krk.

ConocoPhillips, the third-largest U.S. oil producer, is exploring the sale of some its North Sea assets in Norway as it seeks to divest overseas operations, two people with knowledge of the matter said.

Weatherford International raised its layoff target to 10,000 positions on Thursday after booking an over 50 percent income drop in the first quarter.

Baker Hughes Inc (BHI.N), which is being bought by Halliburton Co (HAL.N) for $35 billion, said it expects "unfavorable market conditions" to persist in the second quarter as drillers turn off more rigs, intensifying a glut in oilfield services.

Russia has a five year window, at best, to successfully enter the global LNG markets and even that window is closing fast. That sentiment was the major takeaway from the recent Russian LNG Congress in Moscow.

Brussels will on Wednesday accuse Russia’s Gazprom of illegal abuse of its dominant position in Europe’s gas market, unveiling antitrust charges that threaten to inflame already difficult relations with Moscow.

The UK is to force Russian billionaire Mikhail Fridman to sell a dozen North Sea gas fields owned by his $10bn energy fund L1 Energy, giving him just three months to comply or lose operating rights.

Oil services company Weatherford International Plc increased the total number of employees it is looking to lay off in 2015 to 10,000 as it copes with the fall in oil prices.

Halliburton has cut 9,000 jobs in about six months and is considering additional cost-cutting moves as falling oil prices reduce demand for its drilling help.

Revenue for the first quarter of 2015 was $4.6 billion, down 20% compared to the first quarter of 2014.