Private equity fund manager Kerogen Capital has invested AUD30 million (approximately US$27 million) in Twinza Oil, a company with oil and gas interests in Australia, Papua New Guinea and Thailand. The deal was structured as a new share subscription and gave Kerogen up to a 29 percent stake in Twinza. Twinza’s portfolio currently comprises a 100 percent operating interest in an oil and gas shale play in Australia, a 90 percent interest in a shallow water gas and condensate appraisal project in Papua New Guinea and a 50 percent interest in two onshore exploration blocks in Thailand