FINE MANAGEMENT PRACTICE OF COALBED METHANE GROUND EXTRACTION ON XIANDAO-1 WELL IN SHIYUAN COAL MINE
Fine extraction is a practice in coalbed methane management by using extraction data for obtaining a high yield. When extracting coalbed methane on ground, mining coal leads to a decrease in strata energy, and a fast falling in case pressure, which needs fine extraction to secure ground extraction for a stable production. This paper, based on a case study on Xiandao-1 well in Shiquan coal mine, studies its structure, buried depth and strata pressure, and compares its geology with surrounding basin of coalbed methane, analyzes its fracturing features and conducts fine extraction management, providing references for later mass ground extraction. Five steps are planned, setting up objective of daily production up to 400 cubic meters over 30 days, understanding its occurrence and under-pressured features, conducting extraction gas-water evolution characters, planning “balanced water production stage (no gas release), controlling well bottom fluid pressure stage, stably increasing production stage, and declining stage”, controlling well bottom pressure to balance strata pressure and then to determine critical releasing pressure and water point, releasing point, gas releasing point and stably producing point. Emergency measures are also prepared through three groups in managing the process, site group, research group and decision group. A real-time response and linked decision-making strategy bring a daily gas production from 100, 200, 400, 600 and up to 1 041 cubic meters in two months. Fine extraction management is the key means for such an achievement. Mass ground gas extraction requires planning, emergency measures and flowchart, which are vital technical guarantees to ensure a good production.
EMPLOYMENT CAPACITY OF JIANGSU’S MANUFACTURING FROM PERSPECTIVES OF LAND OWNERSHIP AND SECTOR CHARACTERISTICS
Manufacturing is a vital basis for entity economy, and is China’s major industry in employment as well. In order to mitigate Jiangsu’s employment issue and to realize an ordered manufacturing, this paper, based on Jiangsu’s 317 thousand companies’ data, estimates their employees in its prefectures, counties and in different sectors, analyzes its spatial distribution, locality variance and sector difference of employment capacity, and applies multiple linear regression model to study the impacts of land ownership, sector features and other factors on manufacturing’s employment capacity. Jiangsu’s manufacturing has a large employment capacity, higher in state-owned land than in collective land. Employment capacity of Jiangsu’s manufacturing varies geographically, in a decreasing trend from south to north, both in state-owned land and collective land. Employment capacity of high-tech and strategic new manufacturing is far above Jiangsu’s average. Manufacturing in state-owned land, of high-tech and of new strategy, as well as taxation, sales income and land capacity, has an outstandingly positive impact on employment capacity, while regional economic development has a little impact. This paper presents suggestions on optimizing manufacturing layout to fulfill resources’ advantages, promoting a rational allocation among capital, labor and technology, playing a leading role of manufacturing in state-owned land, high-tech and new strategic industries, minimizing the gap of manufacturing’s employment capacity on the basis of innovative development strategy.
STRUCTURAL OPTIMIZATION OF JIANGSU’S CHEMICAL INDUSTRY CONSTRAINED BY CARBON REDUCTION AND WATER ECOLOGICAL CARRYING CAPACITY
Yangtze River economic zone, as China’s key strategic zone, is closely related to national development by its ecological restoration and resources use. Jiangsu’s chemical industry, an intensive polluting and resources-depleting industry, needs to properly handle industrial development and resources & environmental protection, which is of significance to protect Yangtze River and realize carbon reduction. This paper establishes a multiple-objective optimization model of chemical industry under dual constraints of carbon reduction and water ecological carrying capacity, and applies NSGA-II-VIKOR algorithm to discuss the way to adjust Jiangsu’s chemical industrial structure. Balanced development scenario, compared with low-carbon, water-saving and economic development scenarios, can save water of 998.48×104 m3 , reduce carbon emission intensity by 4.27%, and make GDP rising rate up to 4.73% on the basis of benchmark year 2017. Water resources are used efficiently and carbon emission is largely reduced, while economy gains high-quality development. Chemical industrial structure needs to be adjusted through developing rubber and plastics, limiting petroleum processing, coking coal and nuclear fuel processing, using water-saving and carbon-reducing measures in chemical fiber manufacturing. Optimization of chemical industry needs to promote clean energy and reform energy consuming structure, with coal use down by 5.54% and gas & electricity use up by 5.45%. Water resources allocation should be consistent with industrial structural adjustment, which can save water by 9.8% in petroleum processing, coking coal and nuclear fuel processing, and 5.14% in chemical fiber manufacturing, which can be transferred to rubber and plastics sector. This paper presents suggestions on increasing regional ecological carrying capacity to realize high-quality development, establishing clean energy consuming system to raise energy efficiency, developing water-saving industries to materialize a coordinated sustainability in industrial development and water ecology.
COUPLING COORDINATION AMONG BASIC PUBLIC SERVICES, POPULATION URBANIZATION AND ECO-ENVIRONMENT: A CASE STUDY ON GANSU’S HEXI AREA
As new urbanization rapidly advances, a variety of urban issues begin to emerge, which makes urbanization quality a key point for regional development, marked by a coordination among basic public services, population urbanization and eco-environment. This paper, based on a case study in Hexi area, Gansu province, uses entropy, coupling coordination model to measure comprehensive developing level and coordination of basic public services, population urbanization and eco-environment from 2011 to 2021, and applies obstacle model to study the factors impacting their coupling coordination in Hexi area. Hexi’s sub-systems show a rising trend, and vary with areas. Population urbanization is the fastest and the basic public service is the lowest in increment. Coupling degree of Hexi’s ternary system is larger than 0.900, suggesting a strong interaction and a slowly-rising coupling coordination from low level to medium level. Spatially, coupling coordination from high to low is in the order of Jiayuguan, Jinchang, Zhangye, Jiuquan and Wuwei. In the dual system, coordination is the highest in basic public service-eco-environment which promotes a regional development, lowest in basic public service-population urbanization against a regional development. Obstacle factors of ternary system coordination in Hexi’s five cities vary; the top three are social security and employment, urban infrastructure and health care within the basic public services. The ternary system coordination among basic public services, population urbanization and eco-environment promotes Hexi’s regional economy, but the three are still constraints. This paper presents suggestions on optimizing cities’ positioning, fulfilling resources advantages, boosting infrastructure, intensifying agriculture, developing featured industries and green industries to promote a quality coordinated development in Hexi area.
MULTI-SCENARIO DEMAND FORECAST OF RAW NICKEL IN CHINA BASED ON GRAY GM-BP NEURAL NETWORK COMPOUND MODEL
CORRELATION MEASUREMENT AND EFFECTS OF CHINA’S NEW ENERGY INDUSTRIES
ASSET VALUES MATERIALIZATION MECHANISM OF FOREST CARBON SEQUESTRATION RESOURCES FROM PERSPECTIVE OF GAINS
Asset values materialization of forest carbon sequestration resources plays a key role in obtaining the pilot objective of collective-owned natural resources asset entrust. This paper, based on a framework of situation-proposal-theory-system, studies how to materialize the asset values of forest carbon sequestration resources, providing reference for stakeholders to gain from ownership. Forest storage expansion method and market value method are used to measure the forest carbon sequestration values balance of China’s recent four times of inventorying forest resources with results showing that the balance is huge and has been steadily increasing, which explains the significance of this study. Governmental public data shows that forest carbon sequestration, owning huge values, can be converted into gains only from a small proportion. Forest administrations largely rely on governmental funding. It is vital to create new model to materialize forest carbon sequestration values, to convert balance into asset gains and to realize stakeholders’ benefits. This paper, based on the core connotation of Marxist dialectical materialism, presents a point of “gain system view” that is macroscopic, linking, and developing design. It equally treats natural resources’ economic values and asset gains, from gains to all-sharing objective. Each key step has been linked to materialize the economic values of forest carbon sequestration resource assets. Based on “gain system view”, this paper constructs the theoretical mechanism of forest carbon sequestration resource assets from overall framework, key steps and guarantees, initially forming a theoretical system which is employed to conduct system construction. Gains can be obtained through market, finance and industries, and suggestions on system optimization are given. Guarantees of gains can be through “interactive-complete entrust”, and also through “collective ownership” in distribution system from three distributions among central government, local government, enterprise and all people. Gain budget and use management should be established to make gain distribution institutional, normalized and public.
CONSTRUCTION OF COMPUTABLE RURAL-URBAN HOUSEHOLD CARBON ACCOUNT FRAMEWORK NESTED IN URBAN CARBON ACCOUNT
Household as the basic social unit is the major consuming entity. Carbon emission responsibilities established on consumption end are helpful to clarify the stakeholder-based dynamic mechanism for carbon reduction. The present personal carbon management has a lot of issues, with unclear carbon emission boundary, complex personal carbon trading, personal carbon reduction entangling, and lack of stable management system, which can be resolved if household end as the trading base with urban-rural household carbon account being the core. This paper aims at establishing household carbon account framework on the basis of account range, margin, measurable methods and expandable linkage between urban carbon account and personal carbon sink. This paper summarizes the research situation of personal carbon account and household carbon account, and establishes a urban-rural household carbon account system including three sub-accounts of asset, equity and debits, and determines the measure margin, sampling method and calculation of household carbon account based on China’s featured carbon emission management system. Linkage of urban-rural household carbon account to urban carbon account has been further explained, and its methods have also been designed. Relation between urban-rural household carbon account and individual carbon inclusion is differentiated. Combination of household carbon account with carbon market, “visible hand” carbon quota market with “invisible hand” carbon reduction equity market provides a new path for household consumption end carbon reduction, which may avoid overlapping responsibilities and easily link to China’s carbon management system. Urban-rural household carbon account can be a vital tool for China’s carbon management and carbon reduction, supporting carbon emission quota allocation, carbon reduction and trading, incentive mechanism design for carbon inclusion and mobilization of multi-level nested carbon reduction systems in cities.
Study on carbon emission factors and scenario prediction of Heilongjiang’s industrial sectors is of significance to reach Heilongjiang’s green low-carbon development under the background of carbon peaking and carbon neutralization. This paper uses IPCC to estimate Heilongjiang’s historical industrial carbon emission, and applies extended STIRPAT model to determine the six variables from population, economy and technology, square of GDP per capita, population scale, gross industrial production, industrial energy consumption, energy consuming efficiency and energy structure, and employes ridge regression to establish a carbon emission factor model by removing the multi-collinearity of independent variables. This paper also studies Heilongjiang’s social and economic reality from economic development, population scale, energy consumption and energy consumption efficiency, and determines the increment of independent variables combined with macroscopic policies, and predicts its 2020 to 2050 Heilongjiang’s appropriate industrial carbon emission under three scenarios, benchmark, low-carbon and highly-energy-consuming. Heilongjiang’s industrial low-carbon development is facing a huge demand for fossil energy and insufficient energy conversion efficient. Among the six factors impacting industrial carbon emission, square of GDP per capita, gross industrial production, industrial energy consumption and energy structure promote its industrial carbon emission, of which industrial energy consumption works the most, while population scale and energy consuming efficiency play on the contrast. Heilongjiang’s industrial carbon emission shows an increasing-then-decreasing evolutionary trend under the all three scenarios, varying in peaking time and heights, 71.35 millions tons in 2030 under the low-carbon scenario, 89.97 millions tons in 2035 under the benchmark scenario, and 123.68 millions tons in 2045 under the highly-energy-consuming scenario. This paper presents suggestions on largely adjusting industrial energy use structure, focusing on energy technical conversion and upgrade, and perfecting low-carbon green policies.
SPATIAL IMBALANCE AND DYNAMIC EVOLUTION OF CHINA’S LOW-CARBON ENERGY CONSUMPTION STRUCTURE
It is a key step to study China’s low-carbon energy consumption structural trend and to measure its spatial imbalance in advancing energy reform and green development. This paper, based on 2003 to 2020 energy consumption panel data of Chinese provinces/cities, uses Theil Index and spatial auto-correlation to study spatial imbalance and dynamic evolution of China’s low carbon energy consumption structure. The low carbon index of China’s energy consumption structure generally shows a rising trend, up 5.862 in 2020 from 5.298 in 2003. The spatial imbalance of China’s low carbon energy consumption structure is weak, in a rising-then-declining trend indicated by Theil Index. Regional low-carbon energy consumption structure variance largely impacts the overall difference. China’s low-carbon energy consumption structure is of obvious spatial positive correlation with spatial concentrating effect, relatively stably in overall spatial pattern, high-high concentrating in Jiangsu-Zhejiang-Shanghai, weak-weak in southwest and central China. This paper presents suggestions on constructing regional interest union by mutually cooperation, on advancing industrial structure to stimulate social innovation and market, and on optimizing energy industry structure to push energy consumption transformation.