水平井开发低渗透油田的渗流特征研究

方法对比分析了低渗透油藏中水平井和垂直井布井系统的压力梯度分布，并利用启动压力梯度理论建立低渗透油藏中水平井和垂直井产量公式。目的为低渗透油藏的水平井开发提供理论依据。结果水平井布井系统可提高低渗透油田的开发水平。结论对于低渗透油藏来说，利用水平井布井系统可使渗流过程尽快地进入拟线性状态，提高驱油效率；在低渗透油田中，计算水平井和垂直井的产量时，应考虑启动压力梯度；通过改善低渗透油藏的储油物性、加大生产压差以及选择合理的井距来提高低渗透油田的单井产量

Study on percolation characteristics in developing low permeability fields with horizontal wells.

Method\ Pressure gradient distribution is analyzed by implementing correlation analysis on horizontal and vertical wells drilled in low permeability reservoirs. Hence, oil production calculating equations for both types of wells are established with starting pressure gradient theory, respectively. Purpose\ To provide theoretical accordance for developing low permeability reservoirs with horizontal wells. Result\ Horizontal well pattern will improve recovery result of low permeability fields. Conclusion\ For low permeability reservoirs, horizontal well pattern accelerates the percolation process into analog lineal state and better oil displacement efficiency as well. In addition, starting pressure gradient should be considered in calculating production from horizontal and vertical wells drilled in low permeability fields. Finally, single well output increment can be expected through improving oil storage physical property of lowpermeability reservoir, increasing production differential pressure and selecting optimized well space.