JAKARTA, Nov 1 (Reuters) - Indonesia"s sovereign wealth fund has signed a $7.5 billion deal with Dubai-based logistics company DP World to form a consortium over the long-term to invest in seaports in the Southeast Asian country, both said on Sunday. The consortium will explore investments in terminals, cargo park, land transport to and from ports and industrial zones, which will reduce Indonesia"s logistics costs, DP World and the Indonesia Investment Authority (INA) said in a joint statement.