基于均衡驱替的分段注水层段划分及合理配注方法

发布时间：2018-08-04 17:40

【摘要】：分层注水是减少层间干扰、缓解层间矛盾的重要手段,对于纵向层系较多的油藏来说,将储层物性相近的若干层组合,实施分段注水是现场常用且有效的措施。以层间吸水指数级差为注水层段划分指标进行层段划分;根据Buckley-Leverett非活塞式水驱油理论,以实现均衡驱替为目标,建立分段配注量的计算方法,编制计算程序,并用数值模拟模型进行验证。计算结果表明:以层间吸水指数级差作为注水层系分段指标具有科学性;各段配注量分布受储层物性、调控时间、剩余油饱和度影响;调控时间越长,各段间单位厚度配注量差异越小,达到均衡时的含水饱和度越高;段内平均含水饱和度越大,单位厚度配注量越小;层间吸水指数越大,单位厚度配注量越小。
[Abstract]:Stratified water injection is an important means to reduce interlayer interference and alleviate interlayer contradiction. For reservoirs with more longitudinal layers, it is a common and effective measure to carry out piecewise water injection to combine several layers with similar reservoir physical properties. According to the theory of Buckley-Leverett non-piston water flooding, the calculation method and program of injection allocation are established based on the theory of Buckley-Leverett non-piston water flooding, with the goal of achieving balanced displacement as the goal, taking the difference of water absorption index between layers as the index of division of water injection zone. The numerical simulation model is used to verify the model. The calculation results show that it is scientific to use the difference of interlayer water absorption index as the segmental index of water injection system, the distribution of assigned injection is affected by reservoir physical property, regulating time, remaining oil saturation, the longer the control time, the longer the control time. The smaller the difference of the unit thickness flux is, the higher the water saturation is, the greater the average water saturation is, the smaller the unit thickness flux is, and the greater the interlayer water absorption index is, the smaller the unit thickness flux is.
【作者单位】：中国石油大学(华东)石油工程学院;
【基金】：国家科技重大专项“胜利油田特高含水期提高水驱采收率技术”(2016ZX05011-002)
【分类号】：TE357.6

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