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姬塬油田油藏物性差异较大,油藏层间、层内及平面矛盾较突出,在注水过程中的单层突进和舌进现象十分明显,导致注入水推进不均匀。为了改善注水剖面,扩大注入水波及体积,提高水驱效率,稳定油井产量,采取了偏心分层注水措施。本文重点介绍了偏心分层注水工艺技术、流量测试原理及其应用效果。结果表明,偏心分层注水可使油藏吸水剖面明显改善,吸水状况良好,有效地解决了剖面上的吸水差异。同时偏心分层注水可使对应油层得到充分的能量补充,对应油井逐渐见效。
The reservoir properties of Jiyuan Oilfield are quite different. The contradiction between layers, layers and planes in the reservoirs is prominent. The phenomenon of monolayer sudden ingrowth and tongue-in during water flooding is very obvious, resulting in the uneven progress of injected water. In order to improve water injection profile, expand water inflow and volume, improve water flooding efficiency and stabilize oil production, eccentric delamination injection was adopted. This article focuses on the eccentric layered injection technology, flow test principle and its application results. The results show that eccentric stratified water injection can significantly improve the water absorption profile of the reservoir and absorb water well, effectively solving the difference of water absorption in the section. At the same time, decentering water injection can make the corresponding reservoirs fully replenished, corresponding to the oil wells gradually getting better.