Exxon Mobil Corporation today announced estimated second quarter 2015 earnings of $4.2 billion, or $1 per diluted share, compared with $8.8 billion a year earlier. Higher Downstream and Chemical earnings were more than offset by the impact of weaker Upstream realizations and lower asset management gains.

Chevron Corporation (NYSE: CVX) reported earnings of $571 million ($0.30 per share – diluted) for second quarter 2015, compared with earnings of $5.7 billion ($2.98 per share – diluted) in the 2014 second quarter.

Centrica will cut around 10 percent of its workforce and sell up to 1 billion pounds ($1.56 billion) worth of upstream and wind assets by 2017 as Britain's largest utility looks to focus on energy supply and services.

The transaction is ostensibly intended to help energy company KazMunayGaz (KMG) reduce its $20 billion debt portfolio, which has been exacerbated by low oil prices.

Crude oil prices in first-quarter 2015 were the lowest in several years, which contributed to reduced profitability for these companies compared to previous quarters. Although companies reduced investment spending, declines in operating cash flow were greater, contributing to a decline in cash balances. Second-quarter 2015 results could show continued declines in profits, cash flow, and capital expenditure.

Global oil and natural-gas producers have delayed $200 billion of investment in more than 45 projects following the slump in crude prices, according to Wood Mackenzie.

OPEC and Russia say they expect the global oil market to become more balanced and stable next year after the recent sharp drops.

Royal Dutch Shell said Thursday it will cut 6,500 jobs as it braces for up to several years of low oil prices.

Italian services firm Saipem said Tuesday it will cut 8,800 jobs during the next two years after booking about $1 billion in write downs in the second quarter and slashing its annual guidance.

BP swung to a $6.3 billion second quarter loss on Tuesday after write downs tied to the ongoing conflict in Libya and the company’s recent Deepwater Horizon settlement.

Weatherford International boosted its headcount reduction target by 1,000 on Thursday to 11,000 positions.

The Anglo-Dutch energy giant is betting on crude rising to $90 a barrel by 2020, a key assumption in its move to buy rival BG Group (BG.L) for $70 billion to help transform it into a leading player in the costly deepwater oil production and liquefied natural gas (LNG) markets.

Rotterdam, Europe's largest port, said on Thursday that plans to build a Russian-backed 3 million cubic meter oil storage terminal had been canceled after its Russian partner raised concerns over the project's feasibility.

Schlumberger Ltd.'s second-quarter earnings fell 30% on plunging revenue, as the oil-services sector continues to grapple with weak oil prices.

Low oil prices have tightened the screws on some of the most depleted and costly oilfields in Britain's North Sea, forcing operators to cease production earlier than planned and adding to fears of a domino effect in mature areas.