recoverable reserves
2.EVALUATION OF THE ECONOMICALLY RECOVERABLE RESERVES IN WELLS BANSHEN-7 AND 8 CONDENSATE RESERVOIRS IN QIANMIQIAO BURIED HILL
3.Based on beta function(β-function),a new model for predicting reservoir production rate and recoverable reserves is proposed.
4.Based on the analyses of Arps production decline law and changes of remaining reserve-production ratio. a simple and convenient method for estimating decline factors and recoverable reserves during decline period in any oil- field was presented.
5.③ The new decline curve at p=3 and q=1, p=2 and q=2, p=2 and q=3 are called N1,N2,N3 curves, which can be used to calculate maximum recoverable reserves NRmax at Arps decline curve index n<0, so they have cendn useful value.
6.An example shows that RRRM is more accurate than Arps decline curve method (ADCM). Comparing with traditional method, RRRM has many strong points that can consider the change of recoverable reserves andthe effect of adjustment measures, and hence can be widely utilized.
7.By comprising the Stubb Creek marginal oilfield with other similar oilfields inthe adjacent regions, this dissertation concludes that the C9.0, D3.0, D5.0 and D8.0oil-layers in the Stubb Creek oilfield have commercial development values, and thefinal recoverable reserves may be exceed 5 million tons.
8.The test puts an end to the problems of the conspicuous contradictories among layers,lowly-producing profile and low recoverable reserves of water-drive in heterogeneous stratified reservoir,the goals of subdividing a series of strata,infill drilling,high-rate development and EOR with few wells are achieced.
9.Using variation law of formation pressure along with cumulative oil production during natural depletion of a sealed reservoir,this paper creates a mathematical model, which may reflect such variation law, to try to match on reservoir production historyand furthermore to predict reservoir recoverable reserves with the largest cumulative oil recovery when formation pressure depresses to abandonment pressure.
10.After 30 years of efforts, North Korea has built six nuclear research centers, two research reactor, six uranium deposits, the three uranium dioxide conversion plant, a natural uranium fuel element factory, a nuclear test reactor and a nuclear waste storage site, the domestic proven recoverable uranium reserves amounted to 4 million tons, basically built from uranium mining to nuclear waste disposal of the nuclear fuel cycle system.
