The Optimized Analysis Method for Cost Saving and Efficiency Improving of Shale Gas Drilling Engineering in Sichuan-Chongqing Region
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Authors:
Hai Liu¹ Fan Huang² Min Zhou³ Xian Hu³ Yunrui Zhang³ / Environment and Resource / 2025,7(1): 210-221 / 2025-09-30
- Keywords: Shale Gas Drilling in Sichuan-Chongqing Region; Cost saving and efficiency improving; Pricing method and standard; Standard well; Project cost
- Abstract: Since the key factors of shale gas development are Estimated Ultimate Recovery (EUR) and single well engineering cost, keeping the single well engineering cost decreasing and benefit-increasing becomes one of the most effective measures to realize high-quality development of shale gas. The high-efficiency development model of shale gas can be summed up as “horizontal well platform + super large scale fracturing + industrialized operation + integrated management”, and the main contents of the four aspects are analyzed. Three main closelyrelated problems of shale gas development in the Sichuan-Chongqing area are discussed: unscientific valuation methods of drilling engineering, unreasonable allocation of resources and insufficient incentive measures. The revolutionary cost-decreasing and benefit-increasing matching measures – “three unifications” – are therefore put forward: the unification of engineering valuation methods, the unification of resource allocation, and the unification of incentive measures; The strong policies supporting matching measures – “three guarantees” – are proposed: the guarantee of land use, the guarantee of resource sharing, and the guarantee of the gas price; The overall high-quality development objectives – “three promotions” – are expected: overall promotion of production efficiency, overall promotion of management level, and overall promotion of whole benefits.
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科研立项
Research on Reaction Mechanism of Different Stages of Lean Coal Spontaneous Combustion Based on Thermogravimetric Analysis: A Case Study of 1307 Working Face
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- Keywords: Spontaneous combustion of coal; Chromatographic oxygen absorption; Thermogravimetricdifferential scanning calorimetry; Kinetic mechanism
- Abstract: In response to the urgent need for preventing and controlling the spontaneous combustion of abandoned coal in goaf areas of high-gas mines, this paper focuses on the lean coal located in the 1307 working face of a specific mine as the research subject. Through a combination of on-site sampling, chromatographic oxygen inhalation identification, and thermogravimetric-differential scanning calorimetry experiments, this study systematically reveals the dynamic evolution of the spontaneous combustion process of lean coal. Research indicates that this coal seam exhibits a pronounced tendency for spontaneous combustion, and its oxidation process demonstrates significant phase characteristics. During the increase in temperature gradient, the coal sample undergoes a continuous transformation characterized by initial weight loss due to water evaporation, followed by weight gain attributable to oxidation, and culminating in intense combustion. The mass change trend shifts from an initial decline to a temporary increase, ultimately resulting in a sharp loss. The heat release behavior transitions gradually from heat absorption at lower temperatures to a significant escalation in heat release intensity, with a notable enhancement in heat release capacity during the combustion phase. The evolution of the kinetic mechanism is particularly crucial, as the activation energy increases incrementally with rising temperature. The reaction mechanism transitions from a multi-molecular layer model in the lowtemperature region, through a medium-temperature contraction reaction mode, and ultimately to a hightemperature, two-stage kinetic dominance. This progression reveals the chain reaction nature of coal spontaneous combustion, transitioning from physical adsorption to the breaking of chemical bonds. This research establishes a foundational mechanism for the precise prevention and control of spontaneous combustion in abandoned coal areas within goaf regions.
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科研立项
Research on the Sports Resources Sharing of College and Community in Shanghai from the Perspective of National Fitness
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- Keywords: National fitness; College sports; Community sports; Resources sharing
- Abstract: In order to discuss the sports resources sharing problem of the college and community under the national fitness strategy, this study selected the Shanghai college and community sports resources sharing as the research object by using the methods of literature material, questionnaire survey, and field investigation for the investigation of Shanghai college and community sports resources sharing situation. The analysis found that the Shanghai college and community sports resources sharing faced difficulties in implementing policies, an unsound operation mechanism, capital insufficiency, and weak awareness of resource sharing. In view of these conditions, this study will put forward countermeasures and suggestions for the sharing of college and community sports resources in Shanghai from the aspects of formulating relevant policies and regulations, improving operation and management mechanisms, enhancing financial support, and strengthening the awareness of sharing resources, so as to provide theoretical support and practical enlightenment for the better integration and development of college sports and community sports.
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A study of the expropriation of data in emergency situations
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- Keywords: Emergency situations; Data expropriation; Legal issues; Social ethics; Legal regulation
- Abstract: With the rapid development of information technology, data has become an important resource in modern society. In emergency situations, such as natural disasters and public health events, the timely acquisition and utilisation of data is of great significance for effective response and loss mitigation. However, the expropriation of data in emergencies also involves a series of legal issues and social ethical problems. This article examines the issue of government expropriation of data in emergency situations. The article firstly analyses the necessity and legality of data expropriation, analyses the risks of data expropriation in emergency situations and puts forward corresponding suggestions, and finally puts forward an outlook on the development of the future data expropriation system, stressing that while ensuring data quality and improving the efficiency of expropriation, more attention should be paid to data security and privacy protection.
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Public Kindergartens or “Private Tutoring Institutions” —A Case Study on the Phenomenon of Rural Kindergartens Becoming Primary Schools under Market Competition
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- Keywords: market competition; Rural kindergartens; Elementary school; Case study
- Abstract: In the process of marketization of kindergartens, the phenomenon of elementary school in rural early childhood education still exists. This study uses the qualitative research method to deeply describe the current phenomenon of elementary school in rural kindergartens, explore its social structure motivation, and then analyze the survival path dependence of rural kindergartens. The study found that rural kindergartens have social realities such as losing educational goals, paying attention to parents’ education requirements, and seeking parents’ satisfaction through teaching activities. It also found that the social structure motivation of the phenomenon of elementary school in rural kindergartens and the survival strategy of kindergartens showed dynamic changes and cross-field characteristics, and based on this, the internal mechanism of the phenomenon of elementary school in rural kindergartens was constructed.
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