PGFplot - Fill Intersection of plot and line

Question

What I want: highlight/pattern the left area under the plot between x=0 and x=value ( value is marked by the blue vertical line)

What I have: a plot as shown below with pattern in the wrong intersection part of the blue line and plot

What I tried: adapting the solution provided here, but I don't get why it is written the way it is. This at least explained that the values "L1--R2" are not arbitrarily selected in the first link but it does not give me better ideas for my code. Maybe you see the error that I made and can help me correct it. (and hopefully even explain/provide a link on the working principle of the intersections for the future)

So, at the moment it looks like the attached picture, but the patterned area is supposed to be left of the blue line.

\documentclass[10pt,a4paper]{article}
\usepackage[utf8]{inputenc}     
\usepackage[top=1.3in, bottom=1.2in, left=1.1in, right=0.9in]{geometry}
\usepackage{graphicx}
\usepackage{tikz} 
\usepackage{color}
\usepackage{pgfplots}
\usepackage{pgfplotstable}
\pgfplotsset{compat=1.12}
\definecolor{darkblue}{RGB}{0,51,100}
\usepgfplotslibrary{fillbetween}
\usetikzlibrary{patterns}
\pgfplotstableread[col sep=space]{% 
5.92162500000000060E6   2.95192270864755280E-7
6.54625000000000060E6   2.98080690981653440E-7
7.17087499999999970E6   2.96534276326447840E-7
7.79549999999999970E6   3.02793732456258620E-7
8.42012500000000050E6   3.06886283233832160E-7
1.34171250000000030E7   3.28184774629206280E-7
1.90387500000000000E7   3.38239416667529100E-7
1.96633750000000030E7   3.36457487945737640E-7
2.02879999999999990E7   3.39779376603173590E-7
2.09126250000000000E7   3.41080958966797130E-7
2.27864999999999980E7   3.44990954160802940E-7
2.34111250000000040E7   3.39776166533671200E-7
8.02519999999999990E7   1.71932791566944100E-7
1.06486249999999980E8   4.59595284334464620E-9
1.07110875000000010E8   2.75798201098339790E-9
1.07735500000000010E8   -2.24378030944353400E-10
}\data

\begin{document}
\begin{tikzpicture}
        \begin{axis}[
            no markers,
            height=10cm,
            ymin=0,
            ymax=3.5*10^-7,
            enlarge y limits=upper,
            xmin=0,
            xmax={5*10^8},
            enlarge x limits=0.05,
            width=0.8\textwidth, 
            ]
        \addplot+[darkblue, name path=A] table [col sep=space] from \data;
        \draw[blue, dashed, name path=vline] (axis cs: 8.0251*10^7,\pgfkeysvalueof{/pgfplots/ymin}) -- (axis cs: 8.0251*10^7,\pgfkeysvalueof{/pgfplots/ymax}) node[anchor=west,rotate=90]{Some label};
        \path[name path=lower, intersection segments={of=A and vline, sequence= R1-- L2}
        ];
        \path[name path=axis] (0,0) -- (5*10^8,0);
        \addplot fill between[of=axis and lower, split, every segment no 0/.style={fill=none}, every segment no 1/.style={pattern=north east lines},
        ];
    \end{axis}
\end{tikzpicture}
\end{document}

Answer 1

There is a similar way to do this which involves some changes in your code:

1. The x axis can be named in the options without the need of an external path using x axis line style={name path=axis}.
2. There's no need for the definition of your lower path.
3. The vertical limit has been assigned to a \newcommand. This way we can just use the variable where we need it and we only need to change it in one place for the entire graph. Of course, this makes it easier to be used in the soft clip for the fill as well. It's not necessary, but I think it looks neater.
4. The plot for filling is slightly different: I'm not using the odd/even segment solution, rather just filling between the two paths and then using the domain to apply a soft clip.

Output

Code

\documentclass[margin=10pt]{standalone}
\usepackage{pgfplots,pgfplotstable}

\pgfplotsset{compat=1.13}
\usepgfplotslibrary{fillbetween}
\usetikzlibrary{patterns}

\definecolor{darkblue}{RGB}{0,51,100}

\pgfplotstableread[col sep=space]{% 
5.92162500000000060E6   2.95192270864755280E-7
6.54625000000000060E6   2.98080690981653440E-7
7.17087499999999970E6   2.96534276326447840E-7
7.79549999999999970E6   3.02793732456258620E-7
8.42012500000000050E6   3.06886283233832160E-7
1.34171250000000030E7   3.28184774629206280E-7
1.90387500000000000E7   3.38239416667529100E-7
1.96633750000000030E7   3.36457487945737640E-7
2.02879999999999990E7   3.39779376603173590E-7
2.09126250000000000E7   3.41080958966797130E-7
2.27864999999999980E7   3.44990954160802940E-7
2.34111250000000040E7   3.39776166533671200E-7
8.02519999999999990E7   1.71932791566944100E-7
1.06486249999999980E8   4.59595284334464620E-9
1.07110875000000010E8   2.75798201098339790E-9
1.07735500000000010E8   -2.24378030944353400E-10
}\data

\newcommand\myvline{8.0251*10^7}

\begin{document}
\begin{tikzpicture}
\begin{axis}[
    no markers,
    height=10cm,
    ymin=0,
    ymax=3.5*10^-7,
    enlarge y limits=upper,
    xmin=0,
    xmax={5*10^8},
    enlarge x limits=0.05,
    width=0.8\textwidth, 
    x axis line style={name path=axis}
    ]

\addplot+[darkblue, name path=A] table [col sep=space] from \data;
\draw[blue, dashed, name path=vline] (axis cs: \myvline,\pgfkeysvalueof{/pgfplots/ymin}) -- (axis cs: \myvline,\pgfkeysvalueof{/pgfplots/ymax}) node[anchor=west,rotate=90]{Some label};

\addplot [
    fill=blue!10
    ]
    fill between[
        of=A and axis,
        soft clip={domain=0:\myvline},
];
\end{axis}
\end{tikzpicture}
\end{document}