出光兴产株式会社（Idemitsu Kosan）收购了位于马来西亚砂拉越州海岸的两个海上勘探区块（SK427区块和Ketapu区块）40%的权益。这些权益是从SK earthon获得的，并由马来西亚国家石油公司（PETRONAS）、砂拉越石油勘探与生产公司（Petroleum Sarawak Exploration and Production）、SK earthon和出光兴产株式会社签署了产品分成合同（PSC）。

SK427区块面积约3,324平方公里，而Ketapu区块面积约27平方公里。这两个区块均位于水深10至50米的浅水区。SK Earthon持有每个区块45%的运营权益，PSEP持有15%，出光兴产持有40%。两个区块的合作结构和勘探计划相同。

Idemitsu Kosan acquired a 40% interest in two offshore exploration blocks — Block SK427 and the Ketapu Cluster — located off the coast of Sarawak, Malaysia. The rights were obtained from SK earthon, and a Production Sharing Contract (PSC) was signed between PETRONAS, Petroleum Sarawak Exploration and Production, SK earthon and Idemitsu.

Block SK427 covers approximately 3,324 sq km, while the Ketapu Cluster spans about 27 sq km. Both areas lie in shallow waters ranging from 10 to 50 m in depth. For each block, SK earthon holds a 45% operating stake, PSEP holds 15%, and Idemitsu owns 40%. The partnership structure and exploration plans are identical across both blocks.