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30 December 2023, Volume 42 Issue 6 Previous Issue   

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Research and Application of Engineering Intelligent Support System for Well Logging Operation Shi Yujiang, Chen Feng, Zhang Zhijiang, Bai Songtao, Jin Mingang 2023, 42(6): 1-8.  DOI: 10.3969/j.issn.1002-302x.2023.06.001 Abstract ( )   PDF (3152KB) ( )   The information and digital technology like big data and artificial intelligence can unify engineering operation and coordinate decision-making process, thus improving the quality, efficiency and safety of the whole logging business process. It has become one of the main trends for global logging technological development. The engineering intelligent support system (EISS) adopts four layers of configuration – acquisition and transmission, data storage, information service and integrated application. It is composed of eight subsystems – vehicle-carried data center, coordinated management of market and production, management of equipment, management of materials (warehouse), HR management, remote operational support, QHSE management, and statistical analysis. Development of the system strengthens coordination between market and production, management of equipment and materials, and remote operational support. Therefore, the intelligent system is improved on the basis of application and solves the problem of information island. It can fully monitor and control production business and the state of various resources round-the-clock and over the whole process. It can also bring the elements of wells, personnel, materials and equipment under optimization and assemblage, providing the best plan for production business decisions. The system has been cumulatively used for 130,000 well times and effectively improved production business management efficiency,providing technological support for improvement of oil and gas exploration and development quality and efficiency.

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Thinking on Digital and Intelligent Development of CNPC’s Oil and Gas Production Wu Haili, Gong Renbin 2023, 42(6): 9-17.  DOI: 10.3969/j.issn.1002-302x.2023.06.002 Abstract ( )   PDF (2716KB) ( )   Under the new situation of accelerated energy structural adjustment and industrial optimization and modernization, international oil companies stepped up their efforts for application of the new-generation information technology, such as Internet of Things, cloud computing, big data, artificial intelligence and digital twin, thus creating the modern oil and gas production mode. CNPC has attached great importance to information construction and digitalized application and actively promoted construction of Internet of things. Currently, digitalization is applied on a large scale in 16 oil and gas fields with an accumulation of more than 120,000 oil, gas and water wells, more than 7300 stations, and 2 million sets of equipment brought under digitalized management. A standardized and duplicable construction model is established for IOT. As compared to the world’s advanced level, CNPC still needs to further perfect construction of the IOT platform, improve data quality and sharing ability, and expand the scope and depth for application of digit and intelligence to support the businesses. Digitalization and intelligence are the development directions for oil development and production in the future. It is proposed to construct the new-generation intelligent IOT platform for oil and gas production, step up full coverage of IOT and digital regulation, make full use of the new-generation IA technology and enhance digital twin application to construct the new-generation intelligent factories.

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Situation and Suggested Policies on China’s High Water-cut Oilfield Development Wu Yongchao, Fan Zheyuan, Hou Zhen 2023, 42(6): 18-22.  DOI: 10.3969/j.issn.1002-302x.2023.06.003 Abstract ( )   PDF (1942KB) ( )   The reserves and production of China’s high water-cut oilfields account for more than 70 percent of the nation’s total separately. This part of reserves and production are of great importance to securing the nation’s energy supplies and maintaining the high-quality economic development. Most of the high water-cut oilfields are in their high water-cut and high-yield period. Therefore, they face a series of bottlenecks, such as inadequate resources for replacement, EOR technology difficult to satisfy the need for development, high cost and low efficiency. Meanwhile, the nation still has a great potential for oil and gas resources at home with the exploration and development theories and technologies improved continually. There is also an enduring and robust demand for oil and gas. To solve the strategic issues related to future development of the high water-cut oilfields, this article analyzes the situation of China’s high water-cut oilfield development as well as the challenges and opportunities in this area. It is proposed that the relevant mechanisms and the system of policies should be perfected at the national level, including the differential financial and taxation policies on conventional oil and gas classification and different stages, the related policies on the oil and gas royalties, and the preferential policies on key technological research and the policies for refunding special benefits from low oil prices, aiming to promote sustainable and high-quality development of the high water-cut oilfields.

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Discuss China’s New Version of Oil and Gas Resources Classification Tong Zhigang, Gao Yufei, Guo Jigang, Hao Jianrong 2023, 42(6): 23-29.  DOI: 10.3969/j.issn.1002-302x.2023.06.004 Abstract ( )   PDF (1999KB) ( )   The Chinese petroleum industry adopted the 2004 version of oil and gas resources classification for evaluation of resources and release of data. The 2020 version of the classification standards revised the resources and reserves classification with cancellation of prospective resources and speculative resources. In addition, undiscovered resources is replaced with the resources, leading to some troubles for release of resource data and application of standards. Based on comparison of the new and old versions of resources classification standards as well as the SPE and USGS management systems of resources, this paper proposes to reserve the framework of resources classification in the 2004 version, take in the SPE resources classification and perfect the plan for China’s classification of oil and gas resources. It is also proposed to adopt the volumetric method and the Monte Carlo sampling simulation based on prospect scale and number distribution prediction for evaluation. The emphasis is placed on estimation of the prospective resources in place with efforts to make further evaluation on economic recoverability of resources, thus estimating possible additions to reserves within a certain timeframe.

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Construction of Full Life Cycle Cost Management Model for R&D Projects of Oil and Gas Enterprises Zhou Juan, Feng Meng, Gu Sui, Liu-Shen Aoyi, Li Jia, Qin Yuan 2023, 42(6): 30-35.  DOI: 10.3969/j.issn.1002-302x.2023.06.005 Abstract ( )   PDF (1898KB) ( )   Management of full life cycle cost for the R&D projects of oil and gas enterprises is now the hot spot and bottleneck in innovation of China’s technological management and the focus of attention in the petroleum industrial technological innovation, too. The oil and gas enterprises followed the four principles – compliance, integration, harmoniousness and digitalization – to construct the management model for full life cycle cost of their R&D projects. The model brought all elements of the whole process under comprehensive management, such as selection of topics, launching of the project, research and development, acceptance and conclusion, and extension and application of the results. The management system was composed of the demand and execution system of the R&D project, the full cost budget management system, the full cost accounting management system, the cost and performance management system, and the supporting system for cost management and addition and deduction of R&D expense. Operation of the model required the security measures in five areas, such as enhancing management for project launch, perfecting cost budget and accounting management, strengthening evaluation and examination of cost management, promoting addition and deduction of cost as stipulated, and establishing the information platform for project management. The management model aimed to provide the theoretical reference and managerial basis for the oil and gas enterprises to continually raise their R&D investment and promote their high-level technological independence and self-reliance.

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Study and Policies of Benchmarking against First-class Oil and Gas Exploration and Development Research Institutes Qin Zhijun, Tan Xinpin, Wan Ce, Li Jun, Wu Aicheng, Zhao Long, Yuan Guang 2023, 42(6): 36-46.  DOI: 10.3969/j.issn.1002-302x.2023.06.006 Abstract ( )   PDF (2375KB) ( )   To effectively promote construction of a first-class oil and gas research institute is one of the key issues to be solved by Xinjiang Oilfield for increase of reserves and production. Starting from benchmarking against the industry’s first-class oil and gas exploration and development research institutes, this paper focuses on the new development conception of Xinjiang Oilfield Exploration and Development Research Institute – “higher quality, higher efficiency and stronger innovation”. In the principle of “taking a panoramic view of the situation, concentrating on the key issues and highlighting the critical points”, the research institute linked “the main responsibilities and main businesses with technological innovation”, established the benchmarking indexes system in match with the first-class oil and gas research institutes and made an all-around, multi-dimensional and dynamic analysis of benchmarking. It also identified the development trend, the shareholding PetroChina’s position and the concrete gap as compared to the benchmarking. Guided by the targets and weakness, Xinjiang Oilfield Exploration and Development Research Institute located the gaps and focused efforts on the “painful points” in its business development. Establish the conceptions of “high-efficiency exploration” and “increase of reserves based on high efficiency”, accelerate economic and effective development of tight conglomerate and lacustrine shale oil, entirely improve performance of heavy oil development, study two-element driving formula system and reservoir physical matchability, and enhanced gas development recovery while reducing declining rate at the initial stage. It put forward the “five-in-one” technological innovation system, accelerate high-quality development, established the databank for benchmarking management, put a regular benchmarking work mechanism in place, tapped the potential through tenacious efforts to benchmark against the advanced level of the industry, and clarified the direction for construction of the first-class oil and gas research institute.

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Discussion on Construction and Application of Knowledge Graph in Oil and Gas Exploration and Development Area Xu Yin, Wei Qian, Zhao Shiliang, Xiong Wei, Wang Yangyang, Liu Bin, Pang Zisheng, Zhao Qimeng, Xu Zijun 2023, 42(6): 47-60.  DOI: 10.3969/j.issn.1002-302x.2023.06.007 Abstract ( )   PDF (2730KB) ( )   With rapid development of big data and artificial intelligence technology at present, the new-generation artificial intelligence is in transition to cognitive intelligence from perceptual intelligence. Knowledge graph, as a carrier of human consciousness and concepts, has come under wide attention in recent years and becomes one of the main development directions for cognitive intelligence in the current stage. Based on the previous study of knowledge graph in the general industry and petroleum area, this paper elaborates the conceptual system of knowledge graph and, from the perspective of business activities, establishes a set of business model-focused and from-top-to-bottom construction techniques for knowledge graph of oil exploration and development. Furthermore, combined with the study of trap, oil and gas reservoir and wellbore, the paper establishes knowledge graphs in the main three research areas of trap, oil and gas reservoir and wellbore, respectively. In the light of the actual business demands, the study explores three application scenarios of utilizing knowledge graphs combined with AI algorithm in oil and gas exploration and development business – knowledge retrieval, knowledge reasoning and knowledge evaluation. With initial application results achieved, knowledge retrieval and knowledge reasoning services significantly improve the quality and efficiency of knowledge acquisition while knowledge evaluation initially brings about rapid acquisition and quotation of various parameters.

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Situation and Enlightenment of Global Oil and Gas Exploration Liu Xiaobing, Ji Tianyu, Li Gang, Wang Zhaoming, He Zhengjun, Wang Yonghua 2023, 42(6): 61-68.  DOI: 10.3969/j.issn.1002-302x.2023.06.008 Abstract ( )   PDF (6382KB) ( )   Global oil and gas exploration investment and workload as well as newly-discovered reserves grew simultaneously in 2022. The reserves of large and medium-size oil and gas fields accounted for more than 80 percent while the deepwater zone remained as the key area of the discoveries from global exploration. Of those, the offshore breakthrough made in the new strata in Namibia, Southwest Africa, was the highest in the area for the first time in nearly 50 years. This discovery is closely related to the exploration concept of conjugate analogy. The continual discoveries were made in progressive exploration of the eastern part of the Mediterreanian Sea. A series of discoveries can be attributed to the efforts of international oil companies focusing on the areas of important discoveries. They rapidly concentrated their efforts on the surrounding favorable exploration blocks and kept a certain amount of newly-added oil and gas reserves. The analysis of overseas exploration made international oil companies in the recent decade shows the companies, led by their strategy, increased investment and established their business presence in the frontier, emerging and mature areas on the basis of the strategic distribution. They depended on the efforts for innovation, geological theoretical development and exploration technological progress to support oil and gas exploration and discoveries. China’s oil companies have made satisfactory exploration achievements in the “go-abroad” efforts of the past three decades. However, a certain gap still remained between the China’s oil companies and the international oil companies in terms of deepwater exploration. It is proposed that the China’s oil companies should emphasize both risk exploration and progressive exploration and try to acquire overseas deepwater favorable exploration blocks, preparing for effective stand-by resources.

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Global Deepwater Oil and Gas Development Characteristics, Potential Distribution and Development Trend Chen Xi, Wang Zuoqian, Gu Shuo, Yue Wenting, Wei Qing, Fan Zhe, Cui Hongjia, Zhang Yu 2023, 42(6): 69-76.  DOI: 10.3969/j.issn.1002-302x.2023.06.009 Abstract ( )   PDF (2167KB) ( )   Global deepwater oil and gas fields are distributed mainly in seven offshore areas – the two banks of middle-to-south Atlantic Ocean, the Mexican Gulf, sea off East Africa, the Mediterranean Sea, the Black Sea, South Caspian Sea and the continental shelf of Northwest Australia. Based on the deepwater oil and gas technology, the remaining recoverable reserves and production in the two banks of middle-to-south Atlantic Ocean account for about 50 percent of the world’s total. The deepwater oil and gas production in the continental shelf area of Northwest Australia has risen rapidly in recent years. The reserve of the oil and gas fields with the middle-to-low economic performance and to be licensed for development is most. Global deepwater oil and gas development has experienced three development stages, mainly with the depletion development style. Deepwater oil and gas is characterized for high cost and high profit. Seven international oil majors have regarded deepwater oil and gas as their main investment area. The deepwater area is an inevitable option for oil companies. It is proposed that the Chinese oil companies should actively acquire the large-scale and high-quality deepwater oil and gas assets and cooperate with international oil companies to share exploration and development experiences in the efforts to take an advantage of integration and establish the deepwater oil and gas operational ability.

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Development Trends and Strategies of Global Oil Majors in Context of Low-carbon Transition Zhang Ningning, Wang Jianjun, Cao Qingchao, Wang Qing, Huang Fei, Sun Peilin 2023, 42(6): 77-86.  DOI: 10.3969/j.issn.1002-302x.2023.06.010 Abstract ( )   PDF (2222KB) ( )   Global oil and gas market has got ridden of the COVID-19 influence since 2022. Oil companies have shown different development characteristics under the background of the green low-carbon transition. International oil companies have made substantial impairment of their assets in steps with declining reserve and production. Great changes have taken place in the situation of competition among the companies. National oil companies took advantage of the chance to increase production and profit against the background of high oil prices with their business performance improved remarkably. Independent oil companies reduced cash outflow from their investment activities, but they made their reserve and production grow by means of acquiring the assets peeled off by international oil companies during the low oil price period. International oil companies accelerated transition to an integrated energy firm, continually strengthened integrated utilization and strategic plans for natural gas and further expanded their deepwater oil and gas business. The differentiations loomed large in low-carbon transition of European and American companies. National oil companies accelerated development and utilization of resources in the transitional window stage and took advantages of resources for business development, thus improving the internationalization level through various channels. It is proposed that China’s oil companies should expand overseas high-quality assets and continually optimized overseas oil and gas business during the transitional decision-making window stage. They should take advantage of the domestic market to step up the efforts for cooperation with foreign countries in exploration and development of oil and gas resources, establish the deepwater commercial and operational ability, improve the competitiveness for deepwater business, pursue energy low-carbon transition and green technological research and development, and promote oil and gas development in harmony with renewable energy.