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產品展廳>>項目研發>>凝析油氣藏試氣井筒節點分析與試井評價技術研究

天然氣開采歷經地層滲流-井筒管流-地面流動,同時天然氣組份及含水各不相同,全過程是一個復雜系統工程。試氣設計適用于天然氣開采行業工程師工程設計以及生產管理工作者日常生產分析計算使用。凝析油氣藏在勘探開發中,需要通過試氣研究,得到試氣最優方案,并對凝析油氣藏進行試井分析,得到儲層參數,最后對凝析油氣藏進行產能評價,從而形成一套凝析油氣藏試氣完整的分析系統,從而能夠了解實際生產情況,掌握各種生產參數對生產的影響,為優化各項生產參數提供依據,方便管理,并能夠預測未來生產趨勢,指導生產措施。

凝析油氣井井筒節點分析制方法及系統研究。

地層井筒耦合流動下的節點理論研究:包括油、氣和水高壓物性參數研究、凝析氣井相圖計算理論研究、井筒凝析下的氣液兩相垂直管流理論、凝析氣井計算IPR曲線方法研究(氣相)、凝析氣井計算OPR曲線方法研究、凝析氣攜液量計算、沖蝕流量計算、氣井水合物預測、氣井井筒溫度及壓力分布計算、氣井通過油嘴節流計算、氣井通過臨界流量計算。

凝析油氣藏試井分析及產能評價方法研究和系統研制。

凝析氣滲流理論、IPR產能評價及試井理論研究,內容如下:凝析氣數學模型的建立、考慮凝析效應定義擬壓力、無量綱參數無量綱方程及邊界條件、無量綱方程求解方法研究、無量綱圖版分析、凝析氣試井分析方法研究、地層產能計算方法研究、凝析油氣藏數理模型建立(油藏模型、地質模型、井筒模型、外邊界模型)。

計算方法以及技術的軟件開發框架設計。

軟件開發方面涉及到復雜計算(地層、井筒及節流閥等)、復雜數據(流體、地層及井參數等)、軟件的數據流、軟件的數據體系、軟件功能優化、報告輸出等多個模塊。

基于XML的軟件內部數據管理;軟件計算所需要的物理量;軟件的格式化輸出;軟件的核心功能算法函數;軟件的界面及輸出相關算法;軟件的圖形顯示及打印框架;軟件輸出系統部分框架。

目前凝析油氣藏的試氣設計方法國內外暫時沒有深入研究。通過試氣分析,找出制約氣井生產的因素,優化采氣工藝方式及采收率,編制配套的鉆井、完井、增產措施、工作制度、采氣工藝方案,對于氣井的產能預測和保證生產,具有重要的指導意義。產品實現了儲層分析、氣井工作制度設計和產能評價的一套流程,為試氣設計提供依據,可形成提高采收率的主導技術,實現油藏的高效開發,具有很強的競爭優勢。

Products>>Project Development>>Study on Condensate Oil and Gas Reservoir Gas Test Wellbore Node Analysis and Well Testing Evaluation Technology

Natural gas exploitation go through formation seepage, wellbore flow and surface flow, at the same time, the composition and water cut of natural gas are different, and the whole process is a complex system engineering. Gas test design is suitable for engineering design of natural gas mining industry engineers and daily production analysis and calculation of engineers. In the exploration and development of condensate oil and gas reservoirs, it is necessary to obtain the optimal scheme of gas test through gas test research, and to carry out well testing analysis of condensate oil and gas reservoirs to obtain reservoir parameters, and finally to evaluate the productivity of condensate reservoirs, so as to form a complete gas test analysis system for condensate reservoirs, so that we can understand the actual production situation and the influence of various parameters on production, provide the basis for optimizing various production parameters, make management convenience, predict the future production trend and guide production measures.

Research on the method and system of wellbore nodal analysis for condensate oil and gas wells

Node theory under wellbore coupling flow including: The study of high pressure physical parameters of oil, gas and water, the calculation theory of phase diagram of condensate gas well, the theory of gas-liquid two-phase vertical pipe flow under wellbore condensate, the method of calculating IPR curve of condensate gas well (gas phase), the method of calculating OPR curve of condensate gas well, the calculation of condensate gas liquid capacity, the calculation of erosion flow rate and the prediction of gas well hydrate. Gas well wellbore temperature and pressure distribution calculation, gas well through nozzle throttling calculation, gas well through critical flow calculation.

Research and system development of well testing analysis and productivity evaluation method for condensate reservoir

Condensate gas seepage theory, IPR productivity evaluation and well testing theory research, the contents are as follows: The establishment of condensate gas mathematical model, considering condensate effect definition of pseudo-pressure, dimensionless parameters/equations and boundary conditions, dimensionless equation solution method, dimensionless plot analysis, condensate gas well testing analysis method, formation productivity calculation method, condensate reservoir mathematical model build (reservoir model, geological model, Wellbore model, outer boundary model).

The software development framework design of calculation method and technology. The main contents are as follows:

Software development involves complex calculation (formation, wellbore and throttle valve, etc.), complex data (fluid, formation and well parameters, etc.), software data flow, software data system, software function optimization, output results and so on.

The internal data management of the software based on XML; the parameters needed for software calculation; the formatted output of the software; the core functional algorithm function of the software; the interface of the software and the related algorithm of the output; the graphic display and printing framework of the software; and the partial framework of the software output system.

At present, the gas test design method of condensate reservoir has not been developed deeply domestic and abroad. Through gas test analysis, it is of great guiding significance for gas well productivity prediction and production guarantee to find out the factors restricting gas well production, optimize gas production process mode and recovery factor, compile matching drilling, completion, production increase measure, working system and gas production process scheme. The product realizes a set of processes of reservoir analysis, gas well working system design and productivity evaluation, which provides the basis for gas test design, forms the leading technology to improve oil recovery, realizes the efficient development of reservoir, and has a strong competitive advantage.

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