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Cost of Environmental Technologies

In fiscal 2015, the INPEX Group continued implementing a range of measures such as reduction of VOC and GHG emissions to reduce its environmental impact.

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Environmental Investments in Fiscal 2015 —Implementation and Effects
(April 2015 to March 2016)
Objective Investment Item Investment Amount
(Thousand Yen)
Quantitative Evaluation of
Investment Effect or
Reduction of Environmental
Impact (Physical Unit)
Climate change
(includes cost of
energy conservation
No. 1 Gas Plant —Made modifications near the separation tanks accompanying a change of gas compressor suction pressure 225,662 - Resulting positive pressure on the flow lines from wells led to decreases in line purging frequency and natural gas (GHG) emissions at the time of well production Currently confirming results
Oyazawa Plant — Replaced outdoor lighting facilities - 26,800 Replaced lighting facilities on the Oyazawa Plant grounds with LED lighting (FY2015: 68 sets) Energy-saving effect of 1.35 kL/year (crude oil equivalent)
Cleaned gas turbine compressors - 304 Performed regular (monthly) cleaning, since output increases after cleaning Gas turbine output increased by approx. 1,200 kW compared to before cleaning Reduction effect: 31.2 kL/month, 374 kL/year (crude oil equivalent)
Converted to LED lighting at parking facilities - 490 Converted parking facility lighting from mercury lamps to LED lamps at four locations Electricity consumption reduced by approx. 3,112 kW/year
Replaced air conditioning facilities - 9,157 Replaced the air conditioning at the Tamagawa Dormitory with energy-efficient air conditioning Unquantifiable
Sub-total 225,662 36,751    
Conservation of
air quality
Koshijihara Plant — Converted firefighting equipment 69,600 - Installed slop tank foam extinguishing lines and tank sprinkling equipment / converted to remote operation of foam extinguishing lines and tank sprinkling master valves / converted to remote operation of oil pan drain valves, etc. Air pollution and water contamination damage from tank fires prevented
Koshijihara Plant — Increased the number of fire pumps 79,000 - Added spare fire pumps Air pollution and water contamination damage from tank fires prevented
Increased the number of fire pumps 82,200 - Added spare fire pumps Air pollution and water contamination damage from tank fires prevented
Koshijihara Plant Tr-A — Converted the VOC removal system temperature control mechanism to a distributed control system (DCS) 20,000 - Converted the VOC removal device's temperature control to PCR-based Enabled rapid temperature control operation and increased the probability of trip avoidance when a system temperature imbalance occurs
Koshijihara Plant — Lorry VOC facilities inspected by the manufacturer - 23,430 Inspected lorry VOC removal systems VOC emissions reduced
Koshijihara Plant Tr-A/B — Replaced exhaust gas impurities adsorbent - 31,800 Exhaust gas impurity removal system adsorbent replaced due to deterioration of performance Impurities removal: 30 kg/year
Koshijihara Plant Tr-C — Replaced crude oil impurities adsorbent - 22,300 Crude oil impurity removal system adsorbent replaced due to deterioration of performance VOC emissions reduced
Cleaned the inside of the No.1 VOC removal system air stripper and filling material - 730 Maintained and improved VOC removal capacity by cleaning and removing iron oxide and other substances accumulated in the air stripper (filling material) VOC emissions reduced
Performed maintenance on No.2 VOC removal system - 1,740 Maintained VOC removal capacity by replacing the system's raw water pump, flowmeter, and chemical feed tank VOC emissions reduced
Sub-total 250,800 80,000    
Conservation of
soil and
Conducted an integrity investigation of the Kusouzugawa dedicated bridge - 31,500 Approx. 40 years have passed since construction of a dedicated pipeline (including oil) bridge within a class A river. Since oil may flow into public waters if a leak occurs, for a reason including pier or superstructure damage, bridge integrity was verified and coating performed to prevent pollution Oil leak volume: zero
Installed oil leak detectors at each plant 39,100 - Since oil may flow into public waters through drainage channels if a leak from plant production facilities occurs, oil leak detectors were installed in oil pans and final water catch basins in drainage channels on plant grounds to minimize the occurrence of pollution Oil leak volume: zero
Drilled an LA Site land subsidence observation well - 11,110 Ascertained the situation at a location where land subsidence occurred after the start of production of a well within the LA Site Land subsidence observation
Minami-Aga No. 1 Plant — Partially replaced a well water injection pipe - 16,500 Leaks are occurring at a frequency of approx. twice a year from a well water injection pipe replaced in 1979. Since water may flow into nearby rice paddies and cause pollution if a high-volume leak occurs, a portion of the pipe was replaced Oil leak volume: zero
Koshijihara Plant — Installed water supply well flowmeters 17,000 - Installed flowmeters on the No. 3 water supply well discharge line and off-premises road sprinkling line Ascertainment of groundwater pumping volume
Implemented 8000 flowmeter yard oil leak prevention measure 810 - Reduced oil leakage risk by adding a drainage tank, manual drainage valve, and drainage pump upstream of the end drainage tank Oil leak volume: zero
Sub-total 56,910 59,110    
Prevention of noise and vibration Minami-Aga Plant — Installed noise reduction measures 8,000 - Installed noise reduction measures on injection pumps and outdoor radiator units at the Shinkuwayama Plant and Ozeki Plant Noise reduction
Sub-total 8,000 0    
Investment amount total 541,372 175,861    
Total 717,233    
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Environmental Investments in FY2014

Environmental Investments in FY2013

Environmental Investments in FY2012

Environmental Investments in FY2011

Environmental Investments in FY2010

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