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China’s marine environment has enormous volumes of oil and gas (O＆G) resources and immense “blue carbon” potential. In the 14th Five-Year Plan, developing the marine economy, using marine resources, and protecting the marine ecological environment are one of China’s important socioeconomic development goals. However, the relationship between the exploitation of offshore O＆G resources, the protection of the marine ecosystem, and the goal of carbon peak and carbon neutrality has not been fully elucidated. This study expounds on the importance and vulnerability of marine ecosystems. Then it combines the status of offshore O＆G exploration and exploitation to present a conceptual model of offshore O＆G-ecology carbon feedback cycle, the pathway of deep connection, and the necessity of synergic development in carbon neutrality process. This paper advocates strategies such as closer combination of marine protection with offshore O＆G design and development, evaluating the carbon budget in the regional ecological assessment and developing low-carbon green oilfield materials to improve the sustainable development and utilization scheme of marine resources. This study aims to provide scientific and theoretical support for relevant institutions and promote in-depth collaboration across marine departments. [ABSTRACT FROM AUTHOR]

Natural gas is a low-carbon and clean energy, and the demand is growing under the background of achieving carbon peaking and carbon neutralization in China. Natural gas purification is an important part of the development of conventional gas fields. The optimal operation of natural gas purification device, energy conservation and emission reduction, and green energy business expansion are of great significance for promoting natural gas production and green and low-carbon development of the industry. Taking the natural gas purification plants of PetroChina Southwest Oil & Gas field Company, which is the earliest in China, the largest in scale, advanced in process technology, fully equipped and highly automated, as an example, the operating status of the existing units and the challenges facing the difficult control of product gas quality indicators and rising operating costs were analyzed. In combination with the goals of carbon peaking and carbon neutralization, this paper gives the specific directions and suggestions on how to increase processing capacity, improve emerging technologies, continue energy conservation and emission reduction, innovate control systems and carry out carbon capture, utilization and storage and green energy business expansion. [ABSTRACT FROM AUTHOR]

With the trend of green development of natural gas industry, the quality of natural gas products is upgrading rapidly. Thus the level of analysis technology of total sulfur content as a key indicator needs to be improved to meet the production demand of online monitoring. Based on the extensive investigation and analysis of the development trend of natural gas industry and technical indicator s, this paper introduces the international standardization research results of total sulfur detection technology, and carries out the experimental research on the detection limit, repeatability and consistency of three on-line detect ion methods of total sulfur (GC-μTCD, GC-IMS, GC-FPD). The results show that the three methods are applicable to detect total sulfur in natural gas, which provides the foundation for the selection and optimiziltion of the on-line analysis method of total sulfur in the future. Finally, it is pointed out that the realization of online detection of total sulfur in natural gas is the trend of future development. Tn the next step, we will continue to c<1rry out on line total sulfur detection by chromatography technology and take part in the international standardization, in order to further establish China's leading position in this field, and provide technical support and standardation guarantee for the green development of natural gas. [ABSTRACT FROM AUTHOR]

The natural gas from the eastern line of China and Russia will soon be introduced into China, it will play a strong role in promoting the natural gas utilization projects in the northeastern area and also face various problems. In order to establish a long-term sustainable development resource supply system, combined with the actual situation of energy supply and demand, the future development direction of natural gas in Northeast China after the arrival of Russian gas is discussed in this paper. The main problems are analyzed as follows: the lack of self production and high dependence of outside the region; many choices of alternative energy by the regional characteristics; peak shaving difficult and the surplus hard to deal with; poor substitution economy and the price too high to bear. Some measures on the contradictions are summed up. Diversification of sources and resources can be ensured to sustainable development. It is clear that natural gas should be used as the transitional energy in Northeast China, and some suggestions on the utilization of natural gas for regional economic development are put forward. [ABSTRACT FROM AUTHOR]