Occidental Petroleum Corp on Monday posted a $8.35 billion second-quarter. Its net loss was $8.35 billion, or $9.12 per share, in the quarter, compared with earnings of $635 million, or 84 cents per share, a year earlier. Its oil and gas production will fall 13% this quarter over last, and another 5% in the fourth quarter, to 1.16 million barrels of oil and gas per day.