Drilling holes to a production after the geological survey until know there are likely to be located in the petroleum, which would make drilling exploration (Exploration Well) using random drilling method to explore petroleum in the area that have not yet been proven, before punch. Then it will have to evaluate the economic value and find out the scope of retention, then the source to make sure that there are plenty of sources for this retention enough commercial puncture hole to drill to bring up is that the petroleum available.After the geological survey and geophysical seismic wave measurements (Seismic Survey) and interpreted to find private sources of petroleum reservoir under the ground and determine what points to make drilling survey. This time, it is the duty of the officer to do drilling drilling "exploration" (Exploration Well). By using the method that we will call random holes drilled for this type of survey, the first ' hole ' (Wildcat Well) to explore petroleum in the area that have not yet been proven drilling at all. Then when you reach the step of economic value evaluation and find out the extent of petroleum storage source. We are drilling a hole, called "assessment" (Delineation Well) and after we are certain that there are sources of petroleum storage in commercial quantities, enough so we drilled a hole to the "production" (Development Well). To apply the petroleum build-up beneath the ground, up available.Drilling holes for petroleum exploration and production is a challenging task, and is important because we must dig to the depth of about 3-4 kilometers under sea ground. Before drilling a hole 1 hole, it must take more than 60 days by the use of more than 5 million dollar budget hole, which is considered high, and investment risks. Because if we dig to oils or natural gas quantities found, then that doesn't rewarding commercial. It wasted investment, but in the current development of technology and more modern. Drilling time reduced to only 4-5 days per 1 hole and use less than the original budget.
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