Application of varying probabilistic sampling in hydrocarbon resources prediction
Yang Li-na · Petroleum Geology & Oilfield Development in Daqing · 2008
A hydrocarbon resources prediction method discussed herein using the data of discovered reserves of pools and their discovery sequences,applied the theory of varying probabilistic sampling with no replacement.The Horvitz-Thompson estimator cannot be used straightly to obtain the play petroleum potential if the probability of finding a pool is not strictly proportional to its magnitude.To solve the problem,the approximate estimations of the total amount of play resource and the expectation of sample sum are utilized with the assumption that the pool population obeys Pareto law.The method are checked up and the predicted results accords well to the real situation from the point of view of the statistical inference.