| Pan Long exploration area is located in the eastern of Yanchang oilfield. Its location forlongitude109o25o39’to109’, Northern latitude37o01o56’’~36, The eastern borderQingHuaBian, Chuankou oilfield and the western border of Ansai oil field and the northernborder Yujiaping exploration area of the Zichang oilfield and the southern border Fengfuchuan oil field. The main oil layer contains Chang2reservoir, Chang6reservoir and Asmall amount of Chang4+5reservoir in Part of the region.Chang2reservoir permeability with respect to the Chang6and Chang4+5reservoir.Water injection effect is also faster, But with the development of oil fields,bottom water oilcap reservoir becomes more brave, Conventional fracturing process is difficult to adapt to thetransformation of new reservoir. Especially with the work of oilfield water propulsion; If thispart of the reservoir is not developed well especially prone to flooding in advance. Explore thetechnological transformation of new reservoir, Is a breakthrough in utilization of low gradereservoir, Is an important measure of the productivity construction. At present we strive tosolve the Chang2reservoirs with bottom water oil cap fracturing problem, Starting from thereservoir recognition and oil well fracturing process optimization and chemical agent ispreferably and field test and a series of links. Summarized a set of bottom water oil reservoirin Chang2cap plugging fracturing and steering fracturing is the core of the small capacity,small scale fracturing; after in Panlong area well after application, has obtained the goodeffect. |
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