压裂裂缝充填覆膜支撑剂控水增油实验
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王海栋(1991—),男,吉林通化人,在读博士研究生,从事油气田稳油控水开发及渗流机理研究。联系电话:15765966676,Email: nepupetroleum@163.com。

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中国海洋石油集团有限公司“十三五”科技重大专项“深水开发井钻完井关键技术研究”(CCL2018ZJFN0462)。


Experimental study on coated proppants packed in fractures for controlling water cut to increase oil production
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    摘要:

    压裂裂缝内的支撑剂通常用于防止裂缝闭合,而通过拓展附加功能的覆膜支撑剂增加了透油阻水能力,通过“荷叶原理”利用疏水材料在支撑剂表面覆膜制备一种新型控水增油支撑剂,该覆膜支撑剂充填到压裂裂缝内使其具有水相低导流能力和油相高导流能力。研究先利用填砂模型对覆膜支撑剂层的透油阻水能力进行测试实验,再利用大型的3D驱油设备进行水平井压裂裂缝内分别充填常规支撑剂和覆膜支撑剂的水驱油开发实验。结果表明:覆膜支撑剂层的透油阻水能力皆优于常规支撑剂层;当驱替压差小于0.4 MPa时,透油阻水能力略有提高且阻水效果增加超过10%;此外,压裂裂缝内充填覆膜支撑剂的3D驱油开发实验最终采收率比充填常规支撑剂的提高3.95%。

    Abstract:

    The proppants in fractures are usually used to prevent fracture closure. The membrane covering proppant with new functions is developed to enhance the hydrophobic-lipophilic capability. The proppants with function of controlling water cut to increase oil production is developed by using hydrophobic material to cover the surface of proppants according to the lotus leaf principle. The coated proppants are packed into the fractures to make the fracture have low flow conductivity for water phase and high flow conductivity for oil phase. The capacity of oil permeability and water plugging of the coated proppants layer are tested using sand-packed model. Then,the experiments of water flooding are carried out in the fractures filled with conventional proppants and coated proppants respectively by using the large-scale 3D flooding equipment. Results show that the hydrophobic-lipophilic capability of the layer filled with coated proppants is better than that of the layer filled with conventional proppants;when the displacement pressure difference is lower than 0.4 MPa,the hydrophobic-lipophilic capability becomes little higher and the hydrophobic performance is enhanced more than 10%. In addition,the oil recovery of fractures filled with coated proppants is 3.95% higher than that of the fractures filled with conventional proppants.

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王海栋,刘义坤.压裂裂缝充填覆膜支撑剂控水增油实验[J].油气地质与采收率,2019,26(6):136~142

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  • 在线发布日期: 2019-12-26