U.S. oil firms likely to 'organically' cut 4 million barrels per day - regulator

(Reuters) - OPEC members and other oil producers need to cut at least 20 million barrels per day of output, a Texas oil and gas regulator said on Wednesday.U.S. firms are likely to "organically" cut 4 million barrels of output per day in the next three months, Ryan Sitton, one of three elected oil and gas regulators in Texas, wrote in a Tweet. Sitton is not participating in Thursday's OPEC meeting but plans to attend the group's June meeting.Texas regulators next week will consider curtailing..