【摘 要】
:
生物灰岩油藏储层特点是生物礁体本身具有良好的储集空间,其介壳、骨骼碎片酸化改造后可形成渗流通道,开发过程中对储层进行酸化改造可以提高单井产能。生物灰岩油藏依靠天然
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生物灰岩油藏储层特点是生物礁体本身具有良好的储集空间,其介壳、骨骼碎片酸化改造后可形成渗流通道,开发过程中对储层进行酸化改造可以提高单井产能。生物灰岩油藏依靠天然能量开发油井供液不足,产量递减幅度较大;注水开发油井则面临着含水上升速度较快甚至水窜现象的危险,开发上处于两难的境地。针对官三沙一生物灰岩储层特点结合开发实践认识,逐步形成了注水+调剖+周期注水+酸化改造四位一体的综合治理模式,有效改善了区块开发水平。
The bio-limestone reservoir is characterized by a good reservoir space for the reef itself, and the formation of seepage channels after the acidification of the crust and the bone fragments. During the development process, acidizing the reservoir can improve single well productivity. Bio-limestone reservoirs rely on natural energy to develop oil wells for lack of liquid supply, with a large decrease in output. Water injection wells are faced with the danger of rapid water-bearing rise or even water channeling, and development is in a dilemma. According to the characteristics of Guansansha-Bio-limestone reservoir combined with the development and practice of knowledge, a comprehensive management model of waterflooding + profile control + periodic waterflooding + acidification transformation was gradually formed, effectively improving the level of block development.
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