PROVED DEVELOPED RESERVES (PDR)
\pɹˈuːvd dɪvˈɛləpt ɹɪsˈɜːvz pˌiːdˌiːˈɑː], \pɹˈuːvd dɪvˈɛləpt ɹɪsˈɜːvz pˌiːdˌiːˈɑː], \p_ɹ_ˈuː_v_d d_ɪ_v_ˈɛ_l_ə_p_t ɹ_ɪ_s_ˈɜː_v_z__ p_ˌiː_d_ˌiː__ˈɑː]\
Definitions of PROVED DEVELOPED RESERVES (PDR)
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This is the quantity of a natural resource such as coal, oil and gas that is able to be extracted from the wells and mines that are currently operating with the same level of equipment and machinery that is on hand now. These are determined by a test project and the amount of resource that is considered to exist to be mined.
By Henry Campbell Black