It all depends upon when you bought these policies and what details you entered in the proposal form.

If you bought the policy in India, before moving out of India or becoming NRI then all good.
If you bought later on which out informing the insurance company than you are NRI or OCI, then the insurance company can deny the claim.


Best thing is write a letter to LIC telling them that you have these policies (no of policy) and now you are OCI and this is your new address etc.