直井-水平井组合井网平面井间动用规律

中国石油大学(北京)石油工程学院,北京 102249

油气田开发; 水平井; 组合井网; 渗流场; 保角变换; 动用范围; 平面驱替规律

Inter-well oil recovery in horizontal-vertical composed well pattern
CHEN Minfeng, YIN Chengzhe, WANG Zhenpeng, and SHAN shan

College Petroleum Engineering, China University of Petroleum(Beijing), Beijing 102249, P.R.China

oil and gas field development; horizontal well; composed well patterns; seepage field; conformal transformation; recoverable area; plane displacement rule

DOI: 10.3724/SP.J.1249.2018.04368

备注

定量描述组合井网中水平井的作用及组合井网井间动用规律,是组合井网高效部署和油田高效开发的关键.基于实际油田组合井网形式,建立反映实际井网特点的渗流模型; 利用保角变换,求解得到确定井网条件下的势函数与流函数; 提出注采井间无因次动用范围的概念,建立定量描述组合井网井间动用规律的方法; 结合油田实际计算结果对比,组合井网中水平井部署后,注采井间消耗的压力降减小; 中-高速流动区范围扩大,而低速流动区范围减小; 当正对直井产量比越小,这种变化趋势越明显.研究表明,本方法可为定量研究组合井网井间动用规律和组合井网高效部署提供技术支持.

It is critical for developing oilfield and deploying composed well patterns efficiently to describe the function of horizontal well in composed well network and inter-well oil recovery efficiency quantitatively. Based on the composed well pattern in a practical oilfield,a novel fluid seepage model is developed. Using the conformal transformation, the flowing potential function and the flowing stream function in the well pattern are obtained. A novel concept of dimensionless recoverable area is proposed to quantify the oil recovery between producing and injection wells. The calculation results indicate that after deploying horizontal wells,the pressure drop between producing and injection wells is mitigated,which results in the enlargement of high-speed flowing region and the reduction of low-speed flowing region. This trend performs much more significant as the ratio of production rates between the opposite wells reduces. It can be drawn that inter-well production performance can be quantified by using the proposed novel method for the better deployment of composed well pattern.

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