eog resources , inc . supplemental information to consolidated financial statements ( continued ) capitalized costs relating to oil and gas producing activities . the following table sets forth the capitalized costs relating to eog's crude oil and natural gas producing activities at december 31 , 2018 and 2017: .
costs incurred in oil and gas property acquisition , exploration and development activities . the acquisition , exploration and development costs disclosed in the following tables are in accordance with definitions in the extractive industries - oil and gas topic of the accounting standards codification ( asc ) . acquisition costs include costs incurred to purchase , lease or otherwise acquire property . exploration costs include additions to exploratory wells , including those in progress , and exploration expenses . development costs include additions to production facilities and equipment and additions to development wells , including those in progress. .
2018 2017
Proved properties $53,624,809 $48,845,672
Unproved properties 3,705,207 3,710,069
Total 57,330,016 52,555,741
Accumulated depreciation, depletion and amortization (31,674,085) (29,191,247)
Net capitalized costs $25,655,931 $23,364,494
2018 2017
proved properties $ 53624809 $ 48845672
unproved properties 3705207 3710069
total 57330016 52555741
accumulated depreciation depletion and amortization -31674085 ( 31674085 ) -29191247 ( 29191247 )
net capitalized costs $ 25655931 $ 23364494