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通过实施关井压锥,塔河油田碳酸盐岩缝洞型油藏大量高含水油井恢复了产能,增油效果明显。在系统总结矿场关井压锥技术的基础上,对塔河油田碳酸盐岩缝洞型油藏关井压锥的机理、选井原则、关井时机、关井时间、开井工作制度进行了探讨。研究结果表明:关井压锥应主要选择边底水能量强、生产层段位于油水界面以上、前期含水率呈缓慢上升型或台阶型、前期缩嘴压锥或控液压锥有效的高含水油井;油井应在含水率大于80%后开始实施关井压锥;在关井压锥期间,关井时间须根据油井具体情况而定,一般为10～20d,开井后工作制度保持在前期正常生产时产液量的75%左右为宜。
Through the implementation of the shut-in pressure cone, a large number of high-water-cut oil wells in carbonate fractured-hole reservoirs in Tahe Oilfield resumed production with obvious oil boosting effect. On the basis of systematically summarizing the technology of shut-in and pressure-tapping in the mine, the mechanism, well selection principle, shut-in time, shut-in time, open well working system of shut-in pressure cone in carbonate fractured-cave reservoirs in Tahe Oilfield Discussed. The results show that: the keyhole bottom pressure taper should be mainly selected with strong edge water energy, the production interval is above the oil-water interface, the pre-moisture content is slowly rising or step-type, ; When the water cut rate is more than 80%, the well should start to implement the pressure well. When closing the pressure cone, the shut-in time shall be determined according to the specific conditions of the oil well, usually 10-20 days. After opening the well, the working system remains normal in the previous period Production of liquid volume of about 75% is appropriate.