title: Greenhouse gas emissions from oilfield-produced water in Shengli Oilfield, Eastern China.
abstract: Greenhouse gas (GHG) emissions from oil and gas systems are an important component of the GHG emission inventory. To assess the carbon emissions from oilfield-produced water under atmospheric conditions correctly, in situ detection and simulation experiments were developed to study the natural release of GHG into the atmosphere in the Shengli Oilfield, the second largest oilfield in China. The results showed that methane (CH4) and carbon dioxide (CO2) were the primary gases released naturally from the oilfield-produced water. The atmospheric temperature and release time played important roles in determining the CH4 and CO2 emissions under atmospheric conditions. Higher temperatures enhanced the carbon emissions. The emissions of both CH4 and CO2 from oilfield-produced water were highest at 27°C and lowest at 3°C. The bulk of CH4 and CO2 was released from the oilfield-produced water during the first release period, 0-2hr, for each temperature, with a maximum average emission rate of 0.415gCH4/(m(3)·hr) and 3.934gCO2/(m(3)·hr), respectively. Then the carbon emissions at other time periods gradually decreased with the extension of time. The higher solubility of CO2 in water than CH4 results in a higher emission rate of CH4 than CO2 over the same release duration. The simulation proved that oilfield-produced water is one of the potential emission sources that should be given great attention in oil and gas systems.
authors: Key Laboratory of Petroleum Resources, Gansu Province/Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: yangshuanggo@foxmail.com.
authors: Shuang
authors: S
authors: Yang
authors: Key Laboratory of Petroleum Resources, Gansu Province/Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China.
authors: Wei
authors: W
authors: Yang
authors: Key Laboratory of Petroleum Resources, Gansu Province/Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China. Electronic address: gjchen@lzb.ac.cn.
authors: Guojun
authors: G
authors: Chen
authors: Key Laboratory of Petroleum Resources, Gansu Province/Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China.
authors: Xuan
authors: X
authors: Fang
authors: Key Laboratory of Petroleum Resources, Gansu Province/Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China.
authors: Chengfu
authors: C
authors: Lv
authors: Key Laboratory of Petroleum Resources, Gansu Province/Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China.
authors: Jiaai
authors: J
authors: Zhong
authors: Key Laboratory of Petroleum Resources, Gansu Province/Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China.
authors: Lianhua
authors: L
authors: Xue
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D001272:Atmosphere; D002245:Carbon Dioxide / Q000032:analysis; D002681:China; D002980:Climate; D004784:Environmental Monitoring; D008697:Methane / Q000032:analysis; D009609:Nitrous Oxide / Q000032:analysis; D061329:Oil and Gas Fields; D062065:Wastewater / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D002245:Carbon Dioxide; D008697:Methane; D009609:Nitrous Oxide; D062065:Wastewater
keywords: Atmospheric conditions; Carbon dioxide; Methane; Oilfield-produced water