Study on Ground Engineering and Management of Carbonate Oil Field A under Rolling Development Mode

Carbonate rock has the characteristics of complicated accumulation rules,large-scale development,high yield but unstable production.Therefore,the management and control of surface engineering projects of carbonate rock oil and gas reservoirs faces huge difficulties and challenges.The construction of surface engineering should conform to the principle of integrated underground and ground construction and adapt to the oilfield development model.This paper takes the newly added area A of the carbonated oil field as an example to study the ground engineering under the rolling development mode and aims to provide the constructive ideas for the surface engineering under rolling development mode.The overall regional process design adheres to the design concept of"environmental protection,efficiency,and innovation",strictly follows the design specifications,and combines reservoir engineering and oil production engineering programs,oil and gas physical properties and chemical composition,product programs,ground natural conditions,etc.According to the technical and economic analysis and comparison of area A,this paper has worked out a suitable surface engineering construction,pipeline network layout and oil and gas gathering and transportation plan for area A.Some auxiliary management recommendations are also proposed in this paper,like sand prevention management and HSE management for carbonate reservoirs.

Study on the Environmental Impact of Oil and Gas Field Development on the Ecological Red Line Area

To cooperate with the five ministries and commissions of the state to carry out joint investigation on the environmentally sensitive areas involved in oil and gas exploration and development,for the problems found in survey,containing complex type and numerous amount of ecologically sensitive space and ecological red line involved in oil and gas field enterprises,scientific nature of delimitation,lack of strong support of laws and regulations for forced withdrawal of oil and gas production facilities in these areas,some countermeasures and suggestions were proposed,such as further evaluating and combing scope and functional zoning of existing environmentally sensitive areas and ecological red lines,treating differently,enhancing pertinence of prohibition in ecologically sensitive regions,declining blindness of the withdrawal of oil and gas facilities in environmentally sensitive areas,strengthening seriousness of approval of exploration and mining rights of oil and gas resources,and establishing strategic reserve exploration and hierarchical development mechanism. Moreover,oil and gas field enterprises should integrate more efforts to ① accelerate to find out the current situation of environmental quality,② adhere to developing in protection,and protecting in development,③ increase attention and participation strengthen of providing technical support for national oil and gas exploration and development strategy evaluation,④ accelerate communication and docking with local governments on the ecological red line,⑤ actively strive to be included in the positive list management of local governments,⑥ accelerate to establish and perfect primary database of oil and gas production and facilities construction,and ⑦ document management information system of the ecological red line.

Technological progress and development directions of PetroChina overseas oil and gas field production

This study reviews the development history of PetroChina’s overseas oil and gas field development technologies, summarizes the characteristic technologies developed, and puts forward the development goals and technological development directions of overseas business to overcome the challenges met in overseas oil and gas production. In the course of PetroChina’s overseas oil and gas field production practice of more than 20 years, a series of characteristic technologies suitable for overseas oil and gas fields have been created by combining the domestic mature oil and gas field production technologies with the features of overseas oil and gas reservoirs, represented by the technology for high-speed development and stabilizing oil production and controlling water rise for overseas sandstone oilfields, high efficiency development technology for large carbonate oil and gas reservoirs and foamy oil depletion development technology in use of horizontal wells for extra-heavy oil reservoirs. Based on in-depth analysis of the challenges faced by overseas oil and gas development and technological requirements, combined with the development trends of oil and gas development technologies in China and abroad, overseas oil and gas development technologies in the future are put forward, including artificial intelligence reservoir prediction and 3 D geological modeling, secondary development and enhanced oil recovery(EOR) of overseas sandstone oilfields after high speed development, water and gas injection to improve oil recovery in overseas carbonate oil and gas reservoirs, economic and effective development of overseas unconventional oil and gas reservoirs, efficient development of marine deep-water oil and gas reservoirs. The following goals are expected to be achieved: keep the enhanced oil recovery(EOR) technology for high water-cut sandstone oilfield at international advanced level, and make the development technology for carbonate oil and gas reservoirs reach the international advanced level, and the development technologies for unconventional and marine deep-water oil and gas reservoirs catch up the level of international leading oil companies quickly.

Development characteristics, models and strategies for overseas oil and gas fields

Based on about 20 years of accumulated experience and knowledge of oil and gas field development in overseas countries and regions for China's oil companies, the development features, ideas, models and plan designing strategies of overseas oil and gas fields were comprehensively summarized. Overseas oil and gas field development has ten major features, such as non-identity project resource, diversity of contract type, complexity of cooperation model, and so on. The overseas oil and gas field development aims at the maximization of production and benefit during the limited contract period, so the overseas oil and gas field development models are established as giving priority to production by natural energy, building large-scale production capacity, putting into production as soon as possible, realizing high oil production recovery rate, and achieving rapid payback period of investment. According to the overseas contract mode, a set of strategies for overseas oil and gas field development plans were made. For tax systems contracts, the strategy is to adopt the mode of "first fat and then thinner, easier in the first and then harder", that is, early investment pace, production increase rate, development workload and production were decided by the change of tax stipulated in the contract. For production share contracts, the strategy is to give priority to high production with a few wells at a high production recovery rate to increase the cost-oil and shorten the period of payback. For technical service contracts, the strategy is that the optimal production target and workload of the project were determined by the return on investment, so as to ensure that the peak production and stable production periods meet the contract requirements.

CNPC Beefs up Cooperative Development for Onshore Oil and Gas Fields

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Future Development of Ocean Engineering in China

Analysis is given to energy sources home and abroad, the employed and customer market in oceanographic engineering and necessity of its development. Risk out of system is put forward just after marine industry into oceanographic engineering market. It also metions several influencing factors including politics, finance and ocean engineering materials.

Mesozoic–Cenozoic stress field magnitude in Sichuan Basin, China and its adjacent areas and the implication on shale gas reservoir: Determination by acoustic emission in rocks

The Sichuan Basin is one of the vital basins in China,boasting abundant hydrocarbon reservoirs.To clarify the intensity of the tectonic stress field of different tectonic episodes since the Mesozoic and to identify the regional dynamic background of different tectonic movements in the Sichuan Basin and its adjacent areas,the characteristics of the acoustic emission in rocks in different strata of these areas were researched in this paper.Meanwhile,the tectonic stress magnitude in these areas since the Mesozoic was restored.The laws state that the tectonic stress varied with depth was revealed,followed by the discussion of the influence of structural stress intensity on structural patterns in different tectonic episodes.These were conducted based on the paleostress measurement by acoustic emission method and the inversion principle of the stress fields in ancient periods and the present,as well as previous research achievements.The results of this paper demonstrate that the third episode of Yanshanian Movement(Yanshanian III)had the maximum activity intensity and tremendously influenced the structural pattern in the study area.The maximum horizontal principal stress of Yanshanian III varied with depth as follows:0.0168 x+37.001(MPa),R^2=0.8891.The regional structural fractures were mainly formed in Yanshanian III in Xujiahe Formation,west Sichuan Basin,of which the maximum paleoprincipal stress ranging from 85.1 MPa to 120.1 MPa.In addition,the law stating the present maximum horizontal principal stress varies with depth was determined to be 0.0159 x+10.221(MPa),R^2=0.7868 in Wuling Mountain area.Meanwhile,it was determined to be 0.0221 x+9.4733(MPa),R^2=0.9121 in the western part of Xuefeng Mountain area and 0.0174 x+10.247(MPa),R^2=0.8064 in the whole study area.These research results will not only provide data for the simulation of stress field,the evaluation of deformation degree,and the prediction of structural fractures,but also offer absolute geological scientific bases for the elevation of favorable shale gas preservation.

Introduction to the theory and technology on downhole control engineering and its research progress

On the basis of reviewing the development history of drilling engineering technology over a century, this paper describes the technical and scientific background of downhole control engineering, discusses its basic issues, discipline frame and main study contents, introduces the research progress of downhole control engineering in China over the past 30 years, and envisions the development direction of downhole control engineering in the future. The author proposed the study subject of well trajectory control theory and technology in 1988, and further proposed the concept of downhole control engineering in 1993. Downhole control engineering is a discipline branch, which applies the perspectives and methods of engineering control theory to solve downhole engineering control issues in oil and gas wells; meanwhile, it is an application technology field with interdisciplinarity. Downhole control engineering consists of four main aspects; primarily, investigations about dynamics of downhole system and analysis methods of control signals; secondly, designs of downhole control mechanisms and systems, research of downhole parameters collections and transmission techniques; thirdly, development of downhole control engineering products; fourthly, development of experimental methods and the laboratories. Over the past 30 years, the author and his research group have achieved a number of progress and accomplishments in the four aspects mentioned above. As a research field and a disciplinary branch of oil and gas engineering, downhole control engineering is stepping into a broader and deeper horizon.

涪陵气田立体开发地质工程一体化实践

针对涪陵页岩气田一次井网开发后剩余气储量动用不充分的问题,立体开发地质工程一体化技术是提高气藏采收率,实现对剩余储量精准动用的核心手段。通过建立页岩气地质工程一体化高效开发新模式,创新形成页岩气建模数模一体化技术进行剩余气精细研究,明确页岩剩余气分布情况;通过地质工程双甜点耦合,明确穿行黄金靶窗,建立“资源+应力+天然裂缝”三位一体分层效益组合体划分标准体系;基于剩余气差异化分布形态,建立“地质—钻井—压裂—地面协同优化”钻井与压裂优化设计流程;通过实时监测进行钻井轨迹与压裂施工的动态调整,建立一体化数据共享平台及实时决策系统。立体开发地质工程一体化技术指导焦石坝区块预期采收率从12.6%提高到23.3%,立体开发区采收率达39.2%。该技术的应用使页岩气钻采投资、10×10^(8)m^(3)产能建设投资及开发成本逐年缩减,有效指导了涪陵页岩气田提高采收率与高效开发。

油气田开发工程学科研究生的启发式教育

油气田开发工程作为传统工科专业,急需大量高素质的创新性、应用型人才,而启发式教育是培养此类人才的关键点。以油气田开发工程专业为例,从实验教学、实习基地教学、理论教学和导师示范作用四个方面深入探讨如何启发研究生的科研创新能力,提出充分利用现有实验设备和设立多种实验教学模式,充分发挥校内校外实习基地的引导作用,以及结合学生特点强化理论教学的引导作用和导师的示范作用。

中国海上低渗油气田开发历程、关键技术及攻关方向

中国海上低渗透油气资源丰富、分布广泛,但受海洋特殊作业环境、技术和经济性等限制,经济有效开采难度大,攻克技术瓶颈、推进规模化开发意义重大。历经多年实践,充分吸收陆上油田开发经验,立足少井高产,围绕“四个匹配”攻关形成了具有海上特色的低渗有效开发技术路径,提出三项开发策略“压裂投产、能量补充、降本增效”和5项关键技术内容,即储层综合评价、有效能量补充、地质工程一体化、压裂工艺工具与经济评价,成功突破了20 mD以上低渗透油藏开发瓶颈,并逐渐下探至5 mD近特低渗油藏有效开发,有力地推进了海上低渗油田开发进程。未来将进一步探索深层-超深层油气领域关键技术,研发大型压裂作业技术装备,打造海上低渗“CO_(2)驱油+封存”联合工程。

中国海上油气田海域整体开发新模式的提出与探索——以渤海油田为例

中国海上油气面临低品位储量占比持续增加、主力油田高含水且稳产难、工程设施局部饱和及地下资源与地面工程亟待整体协同等问题,特别是在“双碳”战略下,传统的开发模式已不能满足当下需求。提出了海域整体开发新模式,即将单个海域作为一个有机整体,时空域协同统筹地下油气资源“一网”与地面工程“五网”(油、气、水、电、信),构建协同、共享、高效、绿色的开发新模式。以渤海油田为例,系统梳理地下油气资源和地面工程设施特征,构建地下油气资源“一网”和地面工程设施“五网”,开展“一网”+“五网”协同方案研究,优化了多项现有工程设施,统筹了多个新建工程设施预留,提出多项未来工程设施整体布局,推动向标准化、移动共享、绿色开发转型升级,助力渤海油田高质量上产稳产4000万吨。海域整体开发模式是支撑海上油田增储上产稳产的前瞻性探索,为国内外海上其他油气田高质量持续发展提供了有益参考。

石油地质工程中改善高含水期油田注水开发的措施

随着油田开发程度不断加剧,许多油田进入高含水期,对注水开发的效果提出了新的挑战。基于此,本文首先介绍了高含水期的概念及注水开发作为维持和提高油田产量的重要手段,随后详细分析了高含水期油田注水开发面临的主要挑战,最后提出了改善高含水期油田注水开发的具体措施,包括优化注水策略以减少水窜、加强水质管理与设备保护、提高能量效率与经济效益等方面的方法,希望为高含水期油田注水开发提供相关参考。

Reservoir accumulation conditions and key exploration&development technologies for Keshen gas field in Tarim Basin

The Keshen gas field is located in the central part of Kuqa foreland thrust belt in Tarim Basin,and is another large gas field discovered in Kuqa depression after Kela 2 gas field.Since the breakthrough in 2008,a number of large and medium scale gas reservoirs including Keshen 2,Keshen 5 and Keshen 8 have been discovered,that are characterized by ultra depth,ultra-high pressure,ultra-low porosity,ultra-low permeability,high temperature and high pressure.With natural gas geological reserves of nearly trillion cubic meters and production capacity of nearly 5.5 billion cubic meters,the Keshen gas field is the main natural gas producing area in Tarim Oilfield.The Keshen gas field is located in a series of thrusting imbrication structures in the Kelasu structural belt of Kuqa foreland thrust belt.The salt roof structure,plastic rheology of salt beds and pre-salt faulted anticlinal structure constitute the large wedge-shaped thrust body.The thick delta sandstone of the Cretaceous Bashijike Formation is widely distributed,and it forms the superior reservoir-caprock combination with overlying Paleogene thick gypsum-salt bed.The deep Jurassic-Triassic oil and gas migrate vertically along fault system formed in Late Himalaya,break through the thick Cretaceous mudstone and move laterally along the fracture system of the pre-salt reservoirs,to form anticline and fault anticline high pressure reservoir groups.Through near ten years of studies,the three-dimensional seismic acquisition and processing technology for complex mountainous areas,extrusion salt-related structural modeling technology and fractured low-porosity sandstone reservoir evaluation technology have been established,which lay a foundation for realization of oil and gas exploration objectives.Logging acquisition and evaluation technology for high temperature,high pressure,ultra-deep and low-porosity sandstone gas reservoirs,and efficient development technology for fractured tight sandstone gas reservoirs have been developed,which provide a technical support for efficient exploration&development and rapid production of the Keshen gas field.

Prediction of wax precipitation region in wellbore during deep water oil well testing

During deep water oil well testing, the low temperature environment is easy to cause wax precipitation, which affects the normal operation of the test and increases operating costs and risks. Therefore, a numerical method for predicting the wax precipitation region in oil strings was proposed based on the temperature and pressure fields of deep water test string and the wax precipitation calculation model. And the factors affecting the wax precipitation region were analyzed. The results show that: the wax precipitation region decreases with the increase of production rate, and increases with the decrease of geothermal gradient, increase of water depth and drop of water-cut of produced fluid, and increases slightly with the increase of formation pressure. Due to the effect of temperature and pressure fields, wax precipitation region is large in test strings at the beginning of well production. Wax precipitation region gradually increases with the increase of shut-in time. These conclusions can guide wax prevention during the testing of deep water oil well, to ensure the success of the test.

油气田工程的研发成本管理创新策略探讨

油气田企业研发成本管理创新不仅是为了适应国家和油气行业制度性考核要求,也是适应央企提质增效行动计划和实施知识产权战略管理的现实需要。以某油气田企业为例,针对油气田工程的研发成本管理存在的诸多问题,分析油公司体制下油气田工程业务对科学研究(应用性基础研究和应用研究)、试验发展活动的需求和研发高投入客观情况,应用系统分析原理,从油气勘探开发工程业务-工程类型-研发项目类型-研发项目预算-研发项目实施-研发项目核算-研发项目绩效评估(研发投入强度计算和研发费用加计扣除)等分析路径,研究提出油气田工程的研发成本管理创新思路和策略。研究认为,油气田工程的研发投入主要包括科学研究和试验发展经费,科学研究项目成本管理较为完善,而试验发展项目投入较大,其项目管理和成本管理均较弱。针对油气田工程的试验发展项目成本管理创新,建议通过加强研发项目合同管理,提升研发项目全生命周期合理合规化管理水平,强化研发成本预算和核算管理优化,增强研发项目数字化管理能力,重视研发费用加计扣除精益化等措施,切实提高油气田企业研发成本管理创新水平,以增大研发投入比重和加计扣除税额,彰显油气田企业科技创新驱动发展态势。

钻井工程中井漏的预防及堵漏技术研究

本文首先从主观原因和客观原因两个方面入手,分析了石油钻井工程井漏的原因,其次提出了钻进工程井漏事故预防措施和常见的防漏堵漏工艺,旨在保证钻井工程中井漏情况的发生。

采油工程在油田开发中面临的问题和对策

石油资源作为国家经济发展、人民生活水平提高的重要保障,受到了世界各国的高度重视。目前,我国对石油资源的需求也在日益增大,在油田开发过程中,采油工程可以有效提高油田企业的油井产量和原油采收率,很大程度促进了油田开发的效率。着重分析了采油工程在油田开发中存在的问题并提出了改进措施,希望能进一步推进石油行业的发展。

海上边际油气田海工开发方案优选技术研究

通过对海上边际油气开发现状和必要性的研究,结合海上边际油气田海工开发方案编制方法,以中国南海边际油气田W区块开发为例,探讨海上边际油气田海工开发方案的优选方法。

石油系统地面工程建设监督管理创新的探索与实践

胜利油田地面工程建设监督管理始终以习近平新时代中国特色社会主义思想为指导,深入贯彻油田“五大战略、三大目标”战略部署,努力化解新形势下制约油田地面工程建设高质量发展的不利因素,围绕地面工程建设效能提升的主攻方向,不断创新“监督、科研、拓展”三个机制,搭建“融合、协作”两个平台,强化“党建”一个引领,实现了专业化监督效能的持续提高、内生动力的持续增强、绿色发展理念的持续深化,有效地保障了油田地面工程建设的高质量发展。