UPDATE 1-Rare run of oil finds is little respite for price-hit explorers

* Seven oil and gas discoveries made in recent weeks * 2015 still expected to see lowest discoveries on record * Exploration companies slash budgets after oil collapse * Graphic on oil discoveries: http://link.reuters.com/ted84w (Adds table, corrects spelling in paragraph 18) By Ron Bousso LONDON, May 29 (Reuters) - Exploration firms have made a rare run of oil and gas discoveries in recent weeks as more targeted search strategies bear fruit, but they offer little respite t