底水油藏水平井开发技术研究及应用

Horizontal Well Development Technology and Its Application to Bottom-Water Oil Reservoirs

针对元城油田底水油藏直井开发中后期底水锥进严重、含水上升速度快、挖潜难度大等问题，开展了水平井挖潜试验。通过精细油藏描述和油藏数值模拟方法，搞清储层油水关系及剩余油分布规律，结合水平井开采储层适应性及水平井距离油水界面位置、水平井段长度等参数的优化设计研究成果，优化部署水平井，制定了合理的生产压差及生产动态预测等开发技术政策。现场应用取得了较好的稳油控水和剩余油挖潜效果。对底水油藏水平井开发具有较好的指导作用和参考价值。

A test of tapping potentials of horizontal wells was carried out in view of problems in vertical well development mid-later periods of bottom water oil-reservoirs of Yuancheng oilfield, such as the serious coning of bottom water, rapid rising of water-cut, and difficulty of tapping potentials, etc. Combined with research results of parameters optimized design, such as the reservoir adaptability of horizontal wells exploitation and position of horizontal interval from the oil-water contact, length of horizontal intelvals, and others, horizontal wells are deployed through detailed reservoir description and reservoir simulation methods, and by gaining a clear understanding of the relationship between the oil and water in the reservoirs and distribution of the residual oil. The technologic policy of development such as a reasonable differential production pressures and dynamic production forecasts is constituted. The good effects of stabilizing oil-production by water-control and tapping the residual oil potentials are obtained through on-site applications.