I want to add to bc's information. Here are a few links with light reading. All suggest you dig out the wells and fill w/gravel. You alread have a drain and it need to be cleaned out.
Dig out the well about 3" below the drain. The base should slant away from the house at about 1/4" per foot MINIMUM. You can have it more but not more than 1" per foot is necessary. Line it with Filter Fabric (not landscape fabric) VERY GENEROUSLY. (Go up the sides with the fabric!) Cut a hole in the fabric where the open end of the drain is in the well, and 'shove' the fabric around it. (Kinda make a cut-out in the fabric.) Then, backfill to the recommended depth. The gravel will 'push' against the fabric and keep dirt out from getting into your drain. If you use landscape fabric, in about 3-5 years, it will naturally degrade. You can backfill with gravel to about 1" from the recommended depth and then lay in a custom-cut piece of fabric on TOP of the gravel, then backfill the last 1". This way, you've actually WRAPPED the gravel in the fabric and if leaves and stuff get in the well, you only have to remove a little gravel and shake out the fabric! How's them apples. If the well ends up staying dry, consider a well cover. Go to a lumber yard and get one of the really hard plastic well covers. Measure the maximum width and length of your well because they come in different sizes. The covers at Home Depot and Lowes and such are a flimsy plastic.