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25 August 2011, Volume 30 Issue 4 Previous Issue    Next Issue

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Better and Faster Development of CBM Business Comes from Technological Support Li Meng-xi, Du Yu-hong, Wu Guo-dong 2011, 30(4): 1-4.  DOI: 10.3969/j.issn.1002-302x.2011.04.001 Abstract ( )   PDF (1567KB) ( )   Huabei Oilfield is the first one that develops CBM industry as an emerging industry in China, and the industry has been developed and constructed on a great scale. This paper introduces the exploration and development of CBM resources of Huabei Oilfield Company in Qinshui Basin, Shanxi Province where high-rank coal was developed. During the "11th Five-Year Plan" period, the Company has actively explored the coal-forming environment, gas storage mechanism, and gas happening law of high-rank coal, organized research on tackling technical problems in CBM drilling, fracturing, extraction, gathering and processing, and carried out field test on horizontal well development techniques and construction of demonstration projects, based on the principle of "innovating geological cognition, breaking through technical bottlenecks, increasing per-well production, and developing systematic techniques". Through five years' practice and exploration, the Company has had more than 100 billion cubic meters of proven geological reserves cumulatively, drilled more than 1000 wells, and constructed six gas gathering stations and one central processing unit with one billion cubic meters of annual process load. Annual CBM production of the Company has reached 800 million cubic meters. The Company has constructed PetroChina's first digital and commercial demonstration area for CBM development, pioneering work in commercial production. It is now the leader of PetroChina's CBM business development.

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Prospect for Exploration and Development in West Exploration Area of SINOPEC Shengli Oilfield Company Based on Case Study Wang Xue-zhong 2011, 30(4): 5-8.  DOI: 10.3969/j.issn.1002-302x.2011.04.002 Abstract ( )   PDF (1593KB) ( )   Xinjiang Research Center of Exploration and Development of SINOPEC Shengli Oilfield Company has already made great progress in exploration & development in Junggar Basin in the past 15 years, with annual crude oil production being 600,000 tons and cumulative production over two million tons. Exploration and development technology for shallow and thin lithologic reservoir has been developed in Chnguang Oilfield; HDNS enhanced oil recovery technology for extra heavy oil has been developed in Chunfeng Oilfield; a very shallow low-permeability reservoir has been discovered in the Haqian 1 region; a shallow low-permeability volcanic rock reservoir has been discovered in the Pai 61 region; horizontal well development pilot has been carried out in ultradeep and low-permeability reservoir in Yongjin Oilfield; simulation-horizontal well fracturing test has been carried out in deep and ultra-low permeability reservoir in Zhengshacun Oilfield. Practice shows that the West Exploration Area has broad prospect for exploration and development.

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Study and Application of Extended Reach Well Drilling Fluid System Zhang Min-li, Tian Zeng-yan, Liu Mei-quan, Mu Jian-lei, Deng Jian, Zhang Qi, Ma Cui-xue, Chen Wen-huan, Song Xue-wen 2011, 30(4): 9-13.  DOI: 10.3969/j.issn.1002-302x.2011.04.003 Abstract ( )   PDF (1404KB) ( )   Extended reach well drilling fluid system (BH-ERD system) is a high-performance water base drilling fluid system that combines organic salt brine of high density and high inhibition as base fluid with other additives. The formula of combined organic salt and main additives are determined in the lab; organic salt dosage is 15%~20%, of which all performance indexes are superior to those of conventional potassium salt polymer drilling fluids both at home and abroad. The system has been applied to 12 wells in artificial islands of Chenghai Block One and Two of Dagang Oilfield, with maximum displacement being 3567.55m, maximum deviation being 95.23°, and maxim horizontal displacement to vertical depth (HD/VD) ratio being 2.57, and zero accidents and trouble during drilling. It helps resolve the technical problems like wellbore stability, hole cleaning, and pipe sticking, etc., breaking the monopoly of foreign drilling fluid technology companies, and bringing about significant economic and social results. Now technological specifications for drilling fluid design and wellsite operation of extend reach wells have been worked out, achieving the goal of low cost and localization, and laying technical basis for further application.

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Matching Technologies for Development of Heavy Oil Reservoir Wang Bao-jun, Han Wei-jun, Meng Xian-juan, Jia Wen-chao 2011, 30(4): 14-16.  DOI: 10.3969/j.issn.1002-302x.2011.04.004 Abstract ( )   PDF (1438KB) ( )   The reservoir in Changchunling Oilfield is complicated, which features in high oil viscosity and low formation temperature and pressure. Steam huff and puff, steam flooding, hot water flooding and fire flooding have been conducted successively in the oilfield. To meet the requirements of the production methods mentioned above, systematic technologies suitable for the area are developed, such as the high-temperature four-parameter testing technology, the capillary pressure monitoring technology, the pipe string technology integrating injection, production, stroke and prevention, the thermoecouple-based continuous well temperature inspecting technology, the direct reading pressure monitoring technology and the pressure monitoring technology for the whole process of production. These technologies could not only meet the requirement of heavy oil reservoir development, but also reduce working procedures and cost, laying solid basis for obtaining thorough and precise information for development. This paper introduces the systematic technologies applied in Changchunling Oilfield, which could be valuable reference for development of similar oilfields.

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Application Prospect for Technology of Flowing Back by Hydraulic Jet Pump in Qinghai Oilfield Yuan Chun-hong 2011, 30(4): 17-17,27.  DOI: 10.3969/j.issn.1002-302x.2011.04.005 Abstract ( )   PDF (1911KB) ( )   The technology of flowing back by hydraulic pump has been widely used both at home and abroad, while it is still in the initial stage of testing in Qinghai Oilfield. With advantages of continuity, deep digging, and strong drainage, the technology could help realize joint operation of 3~4 operating sequences, effectively reduce drainage cycle, improve working efficiency, and prevent secondary damage to strata. To popularize and apply the technology is of great practical significance to Qinghai Oilfield.

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Exploration and Practice for Scientific and Technical Innovation and Incentive Mechanism Guo Liang-chun, Ma Ren-qi 2011, 30(4): 18-21.  DOI: 10.3969/j.issn.1002-302x.2011.04.006 Abstract ( )   PDF (1484KB) ( )   The paper represents the outstanding achievements of CNOOC Energy Technology & Services Limited Supervision & Technology Co. in scientific research projects, achievements transformation and management of intellectual property, and illuminates the experience of the Company in establishing and improving scientific and technical innovation and incentive mechanism. It is believed that the system and policies of the Company skewed toward innovators and researchers are powerful guarantee for enhancing its scientific research.

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Elementary Research of NOVE for Oil & Gas Assets and Exploration Zhang Shu-lin, Liao Ling-yuan 2011, 30(4): 22-27.  DOI: 10.3969/j.issn.1002-302x.2011.04.007 Abstract ( )   PDF (1404KB) ( )   New Overseas Venture Evaluation (NOVE) is the spearhead of CNOOC's overseas strategy, of which the quality and credibility directly affect the process of CNOOC's overseas oil & gas exploration and acquisition. The NOVE project differs significantly from that of domestic exploration and thus poses a greater management challenge. The core elements of the NOVE project management system are Quality Management (QM), Human Resource & Training Management (HRTM) and Communication Management (CM). By establishing a system focusing on QM, HRTM and CM, and applying strict quality control scientific evaluation within the system, the NOVE project team has greatly enhanced work efficiency and at the same time trained a group of young staff in a relatively shorter term. Through such effective, flexible and humanized management, the NOVE project team has achieved a lot of geological findings, providing strong technical support for CNOOC's overseas oil & gas exploration and acquisition.

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Intensive Management and Management Team Construction for Exploratory Well Projects Zhang Xiang-hua, Liu Xiao-gang, Tao Lin, Yang Peng-juan 2011, 30(4): 28-30.  DOI: 10.3969/j.issn.1002-302x.2011.04.008 Abstract ( )   PDF (1373KB) ( )   The Exploratory Well Project Team of Drilling Department of Tianjin Branch of CNOOC Ltd. taps drilling resources sufficiently and optimizes resource distribution, achieving organic integration of drilling rig, human resources and information resources, forming an interdependent entirety, and maximizing benefits and efficiency, based on intensive management. It has made the best achievements without any environmental pollution accident, wellbore abandonment accident, serious downhole safety accident, and serious fatal accident throughout the year.

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Environmental Risk Assessment and Compliance Survey Research of Active Service Gas Pipelines and Stations Liu Peng 2011, 30(4): 31-33.  DOI: 10.3969/j.issn.1002-302x.2011.04.009 Abstract ( )   PDF (1371KB) ( )   Oil and gas pipeline transportation is an economic and convenient way of transportation, but it is accident-prone and apt to trigger disaster. It may exert great effect on the environment when danger comes. This paper analyzes and assesses the environmental risk of the West-East Gas Pipeline, and puts forward some suggestions on environmental protection and management as well as risk prevention along the line and stations.

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Brief Analysis on Safe Operation Management of Oil and Gas Pipelines Liu Yan 2011, 30(4): 34-36.  DOI: 10.3969/j.issn.1002-302x.2011.04.010 Abstract ( )   PDF (1372KB) ( )   Oil and gas pipelines are critical to energy supply, national economy and people's livelihood, and they play a very important role in national economy. Safe operation of oil and gas pipelines has something to do with the safety of the people's lives and property and the protection of ecology environment. Pipeline companies are responsible for maintaining pipeline safety, of which the most important thing is to keep safe pipeline operation. This paper analyzes the potential safety hazards existing in pipeline operation, discusses protective measures, and points out that pipeline companies should increasingly improve management, assign responsibilities, pursue pipeline integrity management, and ensure safe and smooth pipeline operation.

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Establishment and Improvement of Responsibility Cost Management System Jin Ying 2011, 30(4): 37-38.  DOI: 10.3969/j.issn.1002-302x.2011.04.011 Abstract ( )   PDF (1366KB) ( )   Responsibility cost management is one of the methods for cost management. To establish and improve the responsibility cost management system and enhance all employees' cost consciousness could assure final fulfillment of total objective cost. This paper believes that it is effective to control cost in enterprises' production activities by classifying responsibility centers within enterprises and carrying out business accounting, governance, monitoring and checking on controllable cost.

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Fine Oilfield Development Based on Predictive Cause-Effect Principle Li Bin, Ran Guo-liang, Gao Zheng-hong 2011, 30(4): 39-42.  DOI: 10.3969/j.issn.1002-302x.2011.04.012 Abstract ( )   PDF (1499KB) ( )   Oilfield development has both naturality and sociality, and man's auto participation is one of its essential characteristics. But generally speaking, man's participation is passive, and people tend to take remedial action after something happens. It is necessary for us to apply the predictive cause-effect principle to oilfield development initiatively, and adopt mitigation countermeasures to deal with problems probably occur, based on the predicting results. Only in this way there is enough room for us to carry out fine oilfield development, to develop oilfields economically and effectively, and to enhance ultimate recovery. Enough attention needs to be paid to the development process and details, since any part or link of the process may result in terrible consequences. This paper illustrates with examples the positive and negative experience and lessons, and points out the importance of adopting well-targeted, correct, and initiative measures.

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Study on Total's Investment Wang Jing, Liu Xiao-cheng 2011, 30(4): 43-48.  DOI: 10.3969/j.issn.1002-302x.2011.04.013 Abstract ( )   PDF (1441KB) ( )   As one of the world's largest oil companies, Total's investment strategy is a valuable reference to Chinese counterparts. The paper firstly analyzes Total's investment scale and structure, and then summarizes its strategy, including its upstream, downstream and chemical business investment strategy, with an aim to give China's oil companies some inspirations.

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172 Series Electrical Submersible Pumps Piao Xue-feng 2011, 30(4): 49-51.  DOI: 10.3969/j.issn.1002-302x.2011.04.014 Abstract ( )   PDF (1477KB) ( )   172 Series Electrical Submersible Pumps are mainly applied to the casing larger than or equal to φ219.075mm in oil wells. Its capacity under 50Hz is 1600~5640m3/d; maximum output power of motor is 900kW; the whole structure of the protector is based on modular design, which could meet the requirement of 900kW. 172 Series Pumps have been widely used and worked well since the end of 2004. The technology has reached advanced level of similar pumps abroad.

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Multiple Compound Balanced Beam Pumping Unit Zhang Jian-cheng, Mai Wen-qing, Liu Mu-zhou, Lu Ya-li, Miao Bo 2011, 30(4): 52-53,64.  DOI: 10.3969/j.issn.1002-302x.2011.04.015 Abstract ( )   PDF (1960KB) ( )   In view of the deficiencies of traditional pumping units, this paper proposes a concept of multiple compound balance and conducts test and verification. It is proved that the new method has better counterbalance effect. This paper gives an introduction about the use, structure, technical descriptions, operating principle, technical characteristics, pilot manufacturing and testing, and field application of the new pumping unit, and points out its range of application. It has been awarded with multiple national patents.

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YZG-22.5/14-G Steam Generator Gong Jun-min, Zou Jun-gang, Zhou Jian-ping, Lin Sen-ming, Lu Ya-li 2011, 30(4): 54-56.  DOI: 10.3969/j.issn.1002-302x.2011.04.016 Abstract ( )   PDF (1500KB) ( )   YZG-22.5/14-G steam generator is designed specially for high viscosity and super high viscosity oil production. It gives due consideration to steam quality corresponding to different production process, adopts advanced burner and fuel supply system with self-detection functions, powerful touch-screen control system and flue gas heat recovery devices, and owns more flexible modular structure. Therefore, it could operate well with higher security, adaptability, and heat efficiency. It has been used in oilfields and achieved good results, which is valid for the design, localization, and reform of steam generator.

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Innocent Treatment Technology for Oily Sludge from Refineries Wang Zhan-sheng, Li Chun-xiao, Yang Zhong-ping, Li Xiu-min, Wang Zong-zhi, Zhang Jian-ming, He Shu-tang 2011, 30(4): 57-58.  DOI: 10.3969/j.issn.1002-302x.2011.04.017 Abstract ( )   PDF (1401KB) ( )   Now oily sludge treatment has been a big problem for oil enterprises to improve environmental quality and realize sustainable development. This paper brings up the "preconcentrating-flocculating-centrifugal dewatering-innocent treatment process", which is an innovative and economic way for oil sludge treatment. It is to deliver condensed mud to superheated vapor spraying equipment for innocent treatment. Field application shows that the technology could recycle oil resources from oily sludge, realize zero emission, and thus achieve significant economic and environmental benefits.

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Development and Application of X80 φ1219×18.4mm HSAW Steel Pipe Sun Hong, Tian Peng, Li Yan-feng, Cui Ming-liang 2011, 30(4): 59-61.  DOI: 10.3969/j.issn.1002-302x.2011.04.018 Abstract ( )   PDF (1409KB) ( )   The X80 φ1219mm×18.4 mm HSAW pipe and welding auxiliary materials including filler metal and flux used for X80 steel are developed for the urgent need of the Second West-East Gas Pipeline Project. Low carbon and high niobium alloy system has been applied to the new product, and mass industrial production of hot-rolled coils with 18.4 mm (WT) has been realized. The HSAW pipe conforms to Q/SY GJX 0102-2007 "Technical Specification of HSAW Pipe for the Second West-East Gas Pipeline Project", and it has now been applied to the Second West-East Gas Pipeline Project.

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Research and Development of X80 Longitudinal Submerged Arc Welded Steel Pipe Wang Gang, Chen Xiao-wei, Li Zhi-hua, Fu Yan-hong, Sun Qi, Liao Shu-mei 2011, 30(4): 62-64.  DOI: 10.3969/j.issn.1002-302x.2011.04.019 Abstract ( )   PDF (1379KB) ( )   To meet the requirement of the Second West-East Gas Pipeline Project, Julong Steel Pipe Company has successfully developed X80 φ1219×25.7/27.5/32mm longitudinal submerged arc welded steel pipe. The Company has made breakthroughs in steel plate design, steel pipe forming, welding, hole enlargement, non-destructive inspection, and chemical and physical test, etc. All this effectively guarantees the quality of steel pipe. The pipe conforms to the technical specification and provides powerful guarantee for construction of the Second West-East Gas Pipeline Project.