| At the moment, Punan oil field has discovered reserves 22,590,000t in fuyu oil layer, and it has possessed industry exploitation value. But there a grape blossom oil layer superimpose area on the tio of the fuyu oil layer. If produce singly, the development beneficial result is bader .Besides there are greater difference between zhe tow zones , and the interval between the two oil layers is over 600m ( the mid-depth of the putaohua reservoir is 1150m,and the mid-depth of the fuyu oil rock is 1800m ), Pressure difference between the straturms is 8MPa ( the reserior pressure of the putaohua oil sand is 12MPa,and one of the fuyu oil rock is 20MPa).According to the development block datum ,the reserves abundance of the fuyu oil layer is low, so it is the particular low permeable oil layer . And ones of the putaohua oil layer is relatively hingher,falling into low low permeable oil layer.The difference permeability between the tow zones is over 100 times. Hence, to achieve the tow zones commingled production, and use the deliverability completely, a new selective mining and pumping at the same time technique that is be fit for zhe long interval and greater difference interlamination pressure is developed. It can overcome zhe pressure disturbance on the two zones possiblely , and achieve rational development, effectively produce. The task total thinking is utilizing to seal at a distance from the utensil dividing two suits of oil layers,two tiers of crude oil are raiseed the liter up surface of the earth through whiping the oil pump together. Design four suits of concrete schemes in all .All may achieve the layering requests produce and layering to request the pressure. The stress with the list pump is give priority to to be tested. This task in case completees , may achieve south the grape oil field supports remaining oil layer economy and effectively opening up . Successful implementation in the interest of yielding on the outer-ring oil field supplys the technique. |
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