This research proposal aims to investigate the effect of crude oil price volatility on the capital budgeting practices of petroleum companies, with a case study on Aramco Saudi. The study will analyze the impact of price volatility on budgets, capital budgeting techniques, and budgetary policies. The research objectives include determining the effect of crude oil price volatility on Aramco Saudi's budgets, investigating the applied capital budgeting technique, assessing the effectiveness of the applied methods, and evaluating the company's efforts to reach its 2020 Vision. The study will contribute to the understanding of capital budgeting techniques in crude oil-dependent economies.