中低渗透复杂断块油藏水平井优化部署——以江苏油区为例

为了提高中低渗透复杂断块油藏水平井的开发效益,根据江苏油区复杂断块油藏水平井井网布置的基本形式,在充分考虑低渗透油藏渗流特征的基础上,运用数值模拟技术,对低渗透油藏水平井开发的各种注采井网部署方案进行了研究。通过优化对比,认为江苏油区中低渗透复杂断块油藏应首先考虑天然能量条件下水平井与边底水之间能否建立有效渗流场,然后再考虑有效的能量补充方式;一对一注采井网是在低渗透油藏中优先采用的注采井网形式。现场应用结果表明,江苏油区瓦2块2口水平井经能量补充后,开发效果得到明显改善,动液面和产液量明显升高,到2010年底2口井累积增产油量为2 550 t,所提出的水平井优化部署方案适用于江苏油区中低渗透复杂断块油藏,为同类型油藏的水平井能量有效利用与补充提供了思路和经验。

Study of well pattern optimization of horizontal well in mid-low permeability complex faulted reservoircase of Jiangsu oilfield

According to the basic type of horizontal well pattern of complex faulted reservoir in Jiangsu oilfield,items of horizontal well pattern optimization are simulated in mid-low permeability complex faulted reservoir with numerical simulation technology on the basis of considering the seepage feature of the fluid in low permeability reservoir.Normal law of well pattern is summarized through optimization and comparison.The result of research is applied in the production items.The results of application show that the research result fits for energy supplementary of horizontal well in mid-low permeability complex faulted reservoir.The research results provide the production of homogeneous reservoir in Jiangsu oilfield with the thinking and experience,and it can enhance the development performance of horizontal well.