姬塬油田L1长8油藏周期注水技术研究及应用

Research and application of cyclic waterflooding technology of Chang 8 reservoir in block L1 of Jiyuan oilfield

姬塬油田L1区长8油藏自2007年采用菱形反九点井网投产,目前已到开发中期。区块主要存在储层非均质性强、微裂缝发育、平面剖面矛盾突出、常规注水调整效果变差等问题。针对储层特征及开发矛盾,本文采用文献调研、理论研究、油藏数值模拟相结合的研究方式,研究了不同周期注水方式的优缺点,结合区域生产动态,优化参数,开展先导试验。通过试验效果分析评价,初步确定了适应L1长8油藏的周期注水参数,对下步周期注水规模推广起到了较大的指导作用。

Chang 8 reservoir in block L1 of Jiyuan oilfield has reached the middle of development, it is developed with diamond-shaped anti-nine point well network. The block mainly has problems such as strong reservoir heterogeneity, development of micro-cracks, prominent contradiction of plane profile, and poor regularity of water injection adjustment. The advantages and disadvantages of different cyclic water-flooding methods are studied combined with regional production dynamics, optimize parameters and carry out pilot test by literature research, theoretical research and reservoir numerical simulation. The parameters of cyclic water injection suitable of Chang 8 reservoir in block L1 have been determined preliminary,which will play a guiding role in the promotion of cyclic water injection next step.