| 非均质各向异性油藏水平井流入动态 |
| |
| 作者姓名： | 王海静 薛世峰 高存法 仝兴华 |
| |
| 作者单位： | 南京航空航天大学航空宇航学院;中国石油大学储运与建筑工程学院;山东大学威海分校机电与信息工程学院 |
| |
| 基金项目： | 国家科技重大专项(2008ZX05031-02-03) |
| |
| 摘 要： | 为分析渗透率非均质性对水平井流入动态的影响,根据质量和动量守恒定律,建立全耦合的非均质各向异性盒式油藏渗流与水平井筒变质量流的耦合模型;通过坐标变换建立各向异性油藏水平井非均质表皮计算模型,将非均质渗透率场转化为等效均质渗透率场和沿井筒变化的非均质表皮;应用源函数法和势的叠加原理得到油藏渗流模型的解,给出基于模型离散的顺序迭代解耦方法.结果表明:渗透率非均质性对水平井流量剖面和采油指数影响较大.水平井流量分布规律与近井渗透率变化规律基本相同;高渗区流量大,低渗区流量小;在等效渗透率相同的情况下,随着近井非均质性的增强,水平井平均采油指数逐渐降低,平均流量分布不均衡因数逐渐增大.该研究为非均质各向异性油藏水平井产能预测和完井参数优化提供了依据.
|
| 关 键 词： | 非均质性 各向异性 油藏 水平井 耦合模型 渗透率场 源函数法 势的叠加原理 采油指数 不均衡因数 流量分布 等效渗透率 |
Inflow performance for horizontal wells in heterogeneous,anisotropic reservoirs |
| |
| Authors: | WANG Hai-jing XUE Shi-feng GAO Cun-fa TONG Xing-hua |
| |
| Institution: | 1.College of Aerospace Engineering,Nanjing University of Aeronautics &Astronautics,Nanjing,Jiangsu 210016,China;2.College of Pipeline & Civil Engineering,China University of Petroleum,Qingdao,Shandong 266555,China;3.College of Mechanical,Electrical & Information Engineering,Shandong University at Weihai,Weihai,Shandong 264209,China) |
| |
| Abstract: | The process of oil recovery with horizontal wells is a coupling process of reservoir flow and wellbore variable-mass flow.The influence of reservoir heterogeneity cannot be ignored.A fully coupled reservoir/wellbore model for horizontal wells in heterogeneous,anisotropic reservoirs is developed.The heterogeneous permeability field is represented by a homogenous permeability field of equivalent permeability with a heterogeneity skin varying along the well.On this basis,the solution for the reservoir flow model is obtained by source function method and superposition principles.The solution methodology based on model discretization is presented.The inflow performance of horizontal wells in heterogeneous reservoirs is studied.Permeability heterogeneity has a great impact on flux profile and productivity of horizontal wells.The flux distribution along the well is basically the same as the near-permeability distribution.The flux in high permeability zone is bigger than that in low-permeability zone.Equivalent permeability being the same,with the increase of near-well heterogeneity,the average productivity of horizontal wells decreases,while the average unbalance of flux distribution increases.This study provides a theoretical basis for the productivity prediction and completion optimization of horizontal wells in heterogeneous,anisotropic reservoirs. |
| |
| Keywords: | heterogeneity anisotropy reservoir horizontal well coupling model permeability sourcefunction method superposition principle productivity index unbalance factor flux distribution equivalent permeability |
| 本文献已被 CNKI 等数据库收录！ |
|
