After the fall of the Old Order, Riau became one of the pillars of the New Order's economic development which was stretched back. In 1944, NPPM geologist Richard H. Hopper and Toru Oki and their team discovered the largest oil well in Southeast Asia, namely in Minas, Siak. This well was originally named Minas No. 1. Minas is famous for its Sumatra Light Crude (SLC) oil which is good and has low sulfur content. In the early 1950s, new oil wells were found in Minas, Duri, Bengkalis, Pantaicermin, and Petapahan. Petroleum exploitation in Riau began in the Siak Block in September 1963, with the signing of a work contract with PT California Texas Indonesia (now Chevron Pacific Indonesia). This province had been relied upon as a contributor to 70 percent of Indonesia's oil production in the 1970s.