<?php
$today = current_time('Ymd');
$args = array(
    'post_type' => 'event_type',
    'post_status' => 'publish',
    'posts_per_page' => '0',
    'meta_query' => array(
        array(
            'key' => 'event_date',
            'compare' => '>=', // Upcoming Events - Greater than or equal to today
            'value' => $today,
        )
    ),
    'meta_key' => 'event_date',
    'orderby' => 'meta_value',
    'order' => 'ASC',
    );

$query = new WP_Query( $args );
if ( $query->have_posts() ) : while ( $query->have_posts() ) : $query->the_post();
?>