Abstract
The research investigated the reality of survey costs and exploration in oil industry and its division according benefits to tangible and intangible costs. This requires aspecial accounting approach. There are three methods of accounting, first revenue methods, second the full cost methods and third successful efforts methods . The study shows the effect of each method and the unite accounting system which is applied by north oil company (public company) in the financial statement and the contrast between them, knowing that the successful efforts method applied by worldly oil companies, and Iraq is one of the countries which the largest oil reserve and makes the most oil industry activities. This has requires the necessity to unite one accounting method to treat costs survey and exploration to measure and evaluate company management .
