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文33沙三上油藏是低渗透油藏,由于注采井距过大,注水开发效果差,采油速度仅0.27%。通过影响低渗透油藏合理井网密度的技术因素、储层的渗流条件法、数值模拟法等不同方法对该油藏合理井网密度进行了研究、论证。实施后,采油速度上升了2.49个百分点,提高采收率21.2个百分点,成功实现了低渗透油藏的注水开发,证明了200~250m注采井距是该油藏的合理井距,所用计算方法是正确的。
Article 33 The Sands high reservoir is a low permeability reservoir. Due to the large injection well spacing and poor water injection development, the oil recovery rate is only 0.27%. The rational well pattern density of the reservoir is studied and proved by different factors, such as the technical factors affecting the rational well pattern density of the low permeability reservoir, the seepage condition method of the reservoir and the numerical simulation method. After the implementation, the oil recovery rate increased by 2.49 percentage points and the recovery rate increased by 21.2 percentage points. The successful development of water injection in low permeability reservoirs proved that the well spacing of 200-250 m was the reasonable well spacing of this reservoir. The method is correct.