David J. O’Reilly, the chairman and chief executive of Chevron, spoke about why Congress should allow more access to offshore drilling .... Q. Democrats say oil companies are sitting on unused leases and they should drill there first before more regions are opened up to production. A. What I would encourage the Democrats to do is to look at the facts. We should not be making these crass statements without facts. There are already existing limitations on leases. Already you have to use them or loose them. It takes time for geological exploration to occur. In our case, over 80...