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坪桥区长6超低渗裂缝油藏经过多年的注水开发,地下孔渗结构、裂缝分布已经改变,结合新的开发模式与技术,在已有裂缝资料的基础上重点以周期性注水和后期改造措施对储层物性、渗吸通道、地层压力梯度的影响进行研究,摸清地下动态。研究表明沿裂缝周期注水对坪桥区储层的物性有较大的影响,渗吸模型改变裂缝与基质间的驱替压力梯度;高渗流模型引起部分侧向裂缝周期的开启关闭。重复压裂、改善井网、水平井技术在坪桥区后期开发中能较好的改善储层物性,增加渗吸通道,保持地层压力。坪桥区长6层油藏的开发可为中后期低渗透裂缝性油藏提供参考。
After many years of water injection development, the pore-infiltration structure and distribution of fractures have changed in the ultra-low permeability fractured reservoirs in Pingqiao District. Combined with the new development modes and technologies, based on the existing fracture data, Reconstruction measures the physical properties of the reservoir, infiltration channel, stratigraphic pressure gradient study to understand the underground dynamics. The results show that the water infiltration along the fracture cycle has a great influence on the physical properties of the reservoir in Pingqiao District, and the permeability model changes the pressure gradient of displacements between the fractures and the matrix. The high permeability model causes the opening and closing of some lateral fracture cycles. Repeated fracturing to improve the well pattern and horizontal well technology can improve reservoir physical properties, increase infiltration channels and maintain formation pressure in later stage of Pingqiao District. The development of 6 reservoirs in Pingqiao district may provide a reference for low permeability fractured reservoirs in the middle and later stages.