Avigator Fortuner/Shutterstock Save for later Print Download Share With oil and gas companies increasingly confident that their production will be needed through at least 2035, reserve replacement ratios (RRRs) — the rates at which companies replace the oil and gas volumes they produce with proven new discoveries — have reentered the conversation with investors. Not all Western majors are keen to re-adopt 100% RRRs as a corporate objective, nor is big reserves growth on their agenda. But the renewed interest nonetheless speaks to investors' desire for assurances that Big Oil is replacing enough produced resources to ensure future cash flows and shareholder payouts. Below, ʶԳ takes stock of the leading Western majors' recent RRR performance as the group more uniformly commits to upstream reinvestment and growth.