Due to the on-site inspection management issues in petroleum enterprises, this paper analyzes the current situation and proposes a series of optimization measures to improve the efficiency and quality of on-site inspection. These measures include optimizing inspection plans, strengthening personnel management and supervision and reinforcing mechanisms. The implementation of these measures will help provide reference for the healthy development of petroleum enterprises.

Aiming at the issues of low sulfur capacity, poor temperature resistance and scaling tendency of triazine desulphurizer in the treatment of sour oil wells, a novel DS desulphurizer system has been developed. This system exhibits higher sulfur capacity, better temperature resistance and stronger anti-scaling properties, which can reduce desulfurization costs by approximately 30%. Four hydrogen sulfide treatment processes including casing drip addition and downhole injection were developed in parallel. Catalytic oxidation desulfurization at the wellhead achieved an efficiency of over 95%. To date, it has been applied in over 800 well applications and the wellhead hydrogen sulfide content has been stably controlled below 20 mg/m3 (below the national standard limit). This has ensured operational safety and environmentally friendly development.

To address the current limitations of internet technologies in the application of work safety within the chemical industry, the inaccuracy of risk prediction and the lack of universally applicable experience, this study delves into the fundamental principles and key technologies of chemical industry internet technologies in empowering work safety. Additionally, it provides a comprehensive review of the practical application effectiveness of chemical industry internet for work safety management in high-risk industries. Transforming traditional work safety management models through digital and intelligent means can facilitate the transition from static to dynamic safety management, thereby enhancing the intrinsic safety of chemical production. ?Integrating the concepts of development and safety into the core competitiveness of the chemical industry will help propel its modernization, accelerate the construction of a manufacturing powerhouse, a cyberpower and a digital China.

Chemical construction projects are characterized by complex processes, diverse and highly hazardous raw materials, short engineering cycles, high-risk operations and a diverse workforce composition, which have long been a focus of widespread societal concern. From design and construction to production operation, each phase bears significant safety management responsibilities. By analyzing the prevalent safety hazards in chemical engineering construction projects and evaluating the current safety status, this study proposes corresponding measures for whole-process management based on practical experience in chemical project management. This provides reference and assistance for safety management personnel.

The evaluation method for the overall safety management status of the refinery engineering projects is single and the inspection results cannot accurately reflect the real safety situation of the engineering sites. To address such issues, this paper proposes a quantitative evaluation system for the safety management of the refinery engineering projects based on the checklist method and the Analytic Hierarchy Process (AHP). The system consists of four levels, including two criterion layers, 17 first-level indicators, 60 second-level indicators and 459 third-level indicators. The weight value of each indicator is calculated by applying the Analytic Hierarchy Process (AHP) and quantitative inspection and evaluation of the safety management of refining and chemical engineering projects are conducted one by one based on the lowest-level indicators of the evaluation system. The quantitative evaluation system proposed in this paper provides a reliable basis for the quantification of the inspection results of refining and chemical engineering projects, thereby guiding the direction for the safety management of engineering projects.

With the increasing demand for environmental protection, exhaust gas absorption towers have been applied in various industries. This paper adopts well-established empirical formulas to systematically design the specifications and main process performance parameters of the ethylene oxide absorption tower. Although the study only focuses on the design of the ethylene oxide exhaust gas absorption tower, the methodology can also provide valuable reference for the design of exhaust gas absorption towers containing other process media.

To reduce carbon emissions in crude oil stabilization processes, this paper takes a negative-pressure flash evaporation process in a certain oilfield as the research object and analyzes the impacts of stabilization tower operating pressure, operating temperature, and compressor outlet pressure on various parameters. The results show that the carbon-emitting equipment includes buffer tanks, heaters, air coolers and negative pressure screw compressors and the carbon emission types are flare combustion carbon emissions and net purchased electricity carbon emissions. The operating temperature of the stabilization tower has the greatest impact on carbon emissions. When the operating pressure of the stabilization tower is 60kPa and the operating temperature is 70℃, the total carbon emissions decrease from 152.6tCO2 to 123.9tCO2. By changing the heat required for the front-end heater from being supplied by purchased electricity to being jointly supplied by low-pressure steam and associated gas combustion, the total carbon emissions can be further reduced from 123.9tCO2 to 81.9tCO2.

In engineering design, safety valve sizing calculation must be based on the physical parameters of the relieved medium. Due to the relatively low critical pressure of C4 hydrocarbon systems, they are prone to reaching supercritical states. However, research on physical property simulation and safety valve sizing methods for supercritical mixed C4 hydrocarbons remains scarcely documented in existing literature. Through screening and comparative analysis, it is found that only the equation of state is suitable for the calculation of supercritical system. Three typical equations of state were selected to simulate the phase diagram of the mixed C4 system. According to the boundary pressure in the phase diagram, the method with the least error was selected. Finally, the conventional calculation, calculation methods for safety valve relief design of supercritical fluids in API 521 and SH/T 3210-2020 are compared by theoretical calculation. Simtech Relief and Aspen safety analysis were used to verify the calculation results, which were proved to be reliable.

As the main oil and gas fields in our country enter the middle and later stages of development, the gathering and transportation pipeline system is facing increasingly severe corrosion challenges. The complex causes of pipeline corrosion include not only the effects of transportation conditions and medium composition, but also the coupled effects of multiple factors covering soil environment and material deterioration. This paper systematically analyzes the corrosion causes of oilfield gathering and transportation pipelines and proposes an anti-corrosion optimization scheme adaptable to all working conditions, achieving improvement in the protection efficiency throughout the pipeline's lifecycle. The research provides theoretical support for the safe and economic operation of gathering and transportation pipelines.

To analyze the influence of the interaction between internal and external double corrosion defects on the residual strength of pipelines, a pipeline model of corrosion defects was established through finite element analysis. The influence of different defect lengths and defect depths on the limit axial spacing was analyzed and the coefficient of the ASME B31G standard formula was corrected. The results indicate that compared with external corrosion, internal corrosion poses a greater threat to pipelines. The deeper the defect depth and the longer the defect length, the less the residual strength is affected by the axial spacing, the larger the limit axial spacing, and the difference between the limit axial spacing and the calculation result given in the DNV PR-F101 standard is significant. A residual strength calculation method suitable for double corrosion defects was established, with a maximum relative error of 7.6%. The research results can provide practical reference value for the adjustment of pipeline operation plans.

To enhance the intrinsic safety level of the station, the parameters and guiding words in the traditional HAZOP method are first improved. Then, the deviation degrees of parameters and countermeasures are weighted and combined to quantitatively process the deviations. Finally, the model is applied to the risk assessment of the internal detection operation process to obtain the risk concentration points. The results show that during the ball collection process, the risks are relatively high in scenarios such as insufficient venting, failure to open the vent valve and blowdown valve, failure to inject clear water, and failure to check the ball passage indicator. During the serving process, the combined deviation value of the blowdown valve not being closed, the serving cylinder not being emptied and the incorrect posture of the pigging device is relatively large, which belongs to the risk concentration points. It is recommended to enhance the training of operation personnel, establish an internal inspection operation ledger, set up an interlock control system and monitoring points along the line to reduce the number of false operation.

Natural gas is the second largest greenhouse gas after carbon dioxide and the leakage problem of natural gas in the oil and gas industry is becoming increasingly serious. This paper analyzes the causes of leakage at various controlled sealing points in natural gas processing and treatment technologies and proposes the adoption of Leak Detection and Repair (LDAR) technology to reduce natural gas emissions.? By introducing several commonly used detection instruments, this study proposes that in LDAR (Leak Detection and Repair) programs, only by adopting multiple detection methods can leaks be quickly identified and natural gas emissions be minimized to the greatest extent. Addressing the limitations of current methods for estimating leakage time, this study proposes a novel approach to calculate leakage time. It adopts a practical measurement method to quantify natural gas leakage and provide a case study to offer reliable data for research on the greenhouse gas effects caused by natural gas leakage.

The overpressure shock wave induced by vapor cloud explosion can cause permanent damage to the equipment and buildings of the oil and gas stations and also pose a risk of injury to the operators. In order to accurately describe the vapor cloud explosion accident scenario, the calculation results of TNT equivalent method, TNO multi-energy method and CFD method were compared under the same scenario conditions. And the applicability and differences of the results from different methods were evaluated. The results show that the TNT equivalent method overestimates the explosive intensity in the near field because of the characteristics of condensed matter explosive. The results of TNO multi-energy method vary greatly due to the selection of blast source intensity. When the concern is near-field explosion risk, it is recommended to use CFD method to calculate explosion parameters. When the concern is far-field explosion risk, it is recommended to use TNT equivalent method or TNO multi-energy method to calculate explosion parameters in simple cases. The research results can provide a theoretical basis for the establishment of explosion-proof measures for oil and gas stations.

The "dual carbon" policy requires refining and chemical companies to pursue the path of green and low-carbon transition. Carbon capture, utilization, and storage (CCUS) technology can help them to achieve this goal. This study selected ethylene carbonate as the target product for process retrofit. The carbon emissions of the facility before and after the retrofit were calculated using activity data and emission factors. This paper conducted an analysis from such two aspects as carbon emission reduction effectiveness and economic viability of the carbon mitigation project. This retrofit not only achieved carbon emission reduction, but also generated additional profits for enterprises, thereby providing a viable development strategy for corporate transformation and upgrading.

To achieve energy conservation and emission reduction in oil and gas stations, the carbon emission processes of the in-station treatment system were analyzed based on dynamic heat transfer modeling of separators and heat exchangers and the main directions and specific measures for carbon emission reduction were determined. The results show that the main types of carbon emissions are direct emissions, fugitive emissions and indirect emissions from net purchased electricity. The sources of carbon emissions are equipment such as heating furnaces, pipelines, storage tanks, external transfer pumps, venting systems, booster pumps, injection pumps and associated gas coolers. The carbon emissions of the crude oil processing system, the produced water treatment system and the associated gas treatment system are 341.75kgCO2/h, 56.96kgCO2/h and 8.67kgCO2/h respectively. By applying the multi-functional oil-water separator, the waste heat utilization process of the produced water and the solar thermal utilization process, zero carbon emissions of the crude oil processing system can be achieved, with a reduction rate of 94.1% at the station.

Hydrogen energy is a kind of secondary energy with abundant sources, wide application, green and low carbon emissions. Hydrogen production from renewable energy is the key to clean and low-carbon development of hydrogen energy. Different from traditional hydrogen production methods, investment stands as a pivotal factor influencing the economics of green hydrogen production projects, so project configuration is the core optimization content of green power hydrogen production method. In this paper, power generation, hydrogen production, hydrogen storage and hydrogen delivery are all included in the model, and the scheduling of electricity and hydrogen is also added to the model to optimize the configuration of green electricity for hydrogen production. The model in this paper has an open and modularized multi-energy optimized configuration system architecture, which can be expanded for different application scenarios. It provides support for configuration decisions of green power hydrogen production projects in different scenarios and is of critical importance to achieving the dual carbon goals.