KUALA LUMPUR, Jan 15 (Reuters) - SapuraKencana Petroleum Bhd SKPE.KL , a Malaysian oil and gas services firm, said on Thursday it has signed a $2.3 billion Islamic loan with 11 lenders.The transaction, which will convert part of the company&aposs conventional borrowing into a syariah-based facility, is Malaysia&aposs largest ever."With the completion of this transaction, SapuraKencana is now on tr