Is there a way you can take a picture of this plant? If so, post it at
alt.binaries.pictures.orchids. It's really difficult to tell what's going on
without knowing what this plant is. Still: you mentioned "soft, dark wood
chips". If the bark is soft, it is most likely broken down, and the plant
needs repotting.

Here are a few suggestions. First and foremost, if there is an orchid grower
anywhere near you, make tracks for it with the plant. Also, do some web
research. Look up Phalaenopsis, Dendrobium and Cattleya, and let us know if
your plant fits into any of those three categories, for starters. Finally,
see if you can find a local orchid society or an agricultural center and
pick their brains.

I'm sorry to be vague, but it's tough to diagnose this way. Let us know how
it goes, and do try to post that picture.

Diana