Experimental study on coated proppants packed in fractures for controlling water cut to increase oil production
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TE357.1

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    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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WANG Haidong, LIU Yikun. Experimental study on coated proppants packed in fractures for controlling water cut to increase oil production[J]. Petroleum Geology and Recovery Efficiency,2019,26(6):136~142

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  • Online: December 26,2019
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