Oil and gas investments can be a great way to diversify a portfolio and potentially earn attractive returns. These investments involve funding projects in the oil and gas industry, such as drilling or developing new reserves. 

By investing in this sector, you will benefit from potential income through royalties or production payments, as well as potential capital appreciation as the project matures. 

Oil and gas investment refers to the act of investing capital in exploration, production, and distribution activities related to oil and natural gas resources.