水驱油田合理井网密度和注采井数比的确定

在油田注水开 发方案设计和井网加密调整工作中,选用何种布井方式或井网密度,使油田水驱采收率获得最高、油田开发经济效益达到最优,这一直是油藏工程研究的主要问题之一。依据文献1]中提出的采收率与井网密度和注采井数比的关系,并结合经济评价和注采平衡分析等方法,提出了一种新的确定水驱油田合理井网密度和合理注采井数比的方法。通过对QL油田进行计算分析,结果表明,在油价上涨的条件下该油田的注采井数比,包括井网密度,还有进一步提高的潜力。

Determination of Reasonable Well Spacing Density and Injection-to-Production-Well Ratio in Waterflooding Field

One of the crucial issues in reservoir engineering study is how to choose pattern well spacing in order to reach the highest recovery and optimal economic efficiency by waterfooding process for field development project designing and well pattern infill or adjustment. Based on the relationship among recovery, well spacing density and injection-to-production-well ratio given by Reference 1], integrated with other methods such as economic evaluation and injection-production balance analysis, etc., this paper proposes a new method for determination of reasonable well spacing density and injection-to-production-well ratio in waterflooding field. The case analysis and calculation from QL oilfield shows that there are additional potentials on the primary density and ratio under the rising of current oil price.