Delayed and incomplete payments to Kurdistan’s oil producers threaten to undermine a new policy that had sparked some investor optimism. A rig at the Miran field, which is operated by London-listed Genel Energy. (Source: Genel Energy) A revenue slump in April has driven the Kurdistan Regional Government (KRG) to break a four-month run of contractual payments to international oil companies, a setback in the government’s campaign to right its finances and win back the confidence of investors.Genel Energy, which leads the development of the Taq Taq field, said Thursday it had received $11 million from the KRG as a partial payment for April exports, less than half the $22.45 million it invoiced the KRG. Genel’s share of th…