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一种新的底水油藏鱼骨分支水平井耦合模型
引用本文:乐平,杜志敏,陈小凡,莫非,黎伟. 一种新的底水油藏鱼骨分支水平井耦合模型[J]. 西南石油大学学报(自然科学版), 2015, 37(4): 117. DOI: 10.11885/j.issn.1674-5086.2013.05.07.01
作者姓名:乐平  杜志敏  陈小凡  莫非  黎伟
作者单位:“油气藏地质及开发工程”国家重点实验室· 西南石油大学,四川成都610500
基金项目:国家自然基金青年基金(51404201);油气资源与探测国家重点实验室开放课题(PRP/open 1501);四川省科技厅应用基础项目(2015JY-0076)。
摘    要:针对底水油藏鱼骨分支水平井的产能预测和井筒压力分布问题,开展了分支水平井井筒与油藏渗流的耦合模型研究。研究利用底水油藏下边界恒压供给的特点,采用微元思想,用储层细分的方法代替井筒细分的处理方法,建立了底水油藏鱼骨分支水平井储层渗流与井筒流动的耦合模型。对储层微元细分处理属于一类新的微元处理方法和研究手段,由此获得的简化耦合模型求解产能和压降剖面时可大幅减小计算量,节约计算成本。简化模型的计算结果符合精确模型的基本规律和认识,同时给出了简化模型向精确模型修正的比例,按此比例修正后的简化模型进行产能的快速估算是一种实际可行的简便方法,为底水油藏鱼骨分支水平产能预测,为进一步计算延缓底水上升的临界产量、临界压差等参数提供了研究基础。

关 键 词:鱼骨分支  水平井  底水油藏  产能公式  耦合模型  

A Coupling Model of Fishbone Multilateral Horizontal Well in Bottom Water Reservoir
Yue Ping,Du Zhimin,Chen Xiaofan,Mo Fei,Li Wei. A Coupling Model of Fishbone Multilateral Horizontal Well in Bottom Water Reservoir[J]. Journal of Southwest Petroleum University(Seience & Technology Edition), 2015, 37(4): 117. DOI: 10.11885/j.issn.1674-5086.2013.05.07.01
Authors:Yue Ping  Du Zhimin  Chen Xiaofan  Mo Fei  Li Wei
Affiliation:State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China
Abstract:In order to solve the problems of productivity prediction and pressure distribution of herringbone branched horizontalwellbore in bottom water reservoir,a coupling model of multilateral horizontal well and seepage flow in the reservoir is investigated.Based on characteristics of the constant pressure supply boundary condition and micro-unit method,by subdividingthe reservoir rather than subdividing the well bore,a new coupling model of herringbone branched horizontal well in bottomwater reservoir is established. Subdivision of the reservoir is a new resolution type of micro-unit treatment and research method.The obtained simplified model greatly decreases the calculation work and compute cost when productivity and pressure dropprofile are calculated. The results of the simplified model accord with the basic principles of accurate model. Meanwhile thispaper proposes the modified ratio of simplified model transferring to the accurate model. It′s an effective and convenient wayto apply the simplified model modified by this ratio to do the rapid evaluation of productivity. Moreover the simplified modelprovides the research basis for productivity prediction of herringbone branched horizontal well in bottom water reservoir. Andit contributes to the further calculation of parameters like critical production and critical pressure drop to delay the occurrenceof bottom water breakthrough.
Keywords:herringbone branched  horizontal well  bottom water reservoir  productivity formula  coupled model  
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