def unf_heat_capacity_oil_Wes_Wright_JkgC(gamma_oil, t_c):
    """
        Oil heat capacity in SI. Wes Wright method

    :param gamma_oil: specific oil density(by water)
    :param t_c: temperature in C
    :return: heat capacity in SI - JkgC

    ref1 https://www.petroskills.com/blog/entry/crude-oil-and-changing-temperature#.XQkEnogzaM8
    """
    return ((2 * 10** (-3) * t_c - 1.429 ) * gamma_oil +
            (2.67 * 10 ** (-3)) * t_c + 3.049) * 1000