何应付,王海涛,伦增珉,赵清民
HE Yingfu,WANG Haitao,LUN Zengmin,ZHAO Qingmin

• 1:中国石化石油勘探开发研究院

摘要(Abstract)：

井网形式对区块的开发效果影响显著,针对水平井蒸汽吞吐后期井间剩余油开采较差和吞吐效果变差等问题,利用物理模拟和数值模拟相结合方法,研究了稠油油藏水平井蒸汽吞吐转驱的合理井网形式,分析了温度场平面和纵向发育特征。模拟结果表明,排状井网蒸汽驱开发效果最佳;温度场平面发育特征分析表明,由注入井至生产井可划分为饱和蒸汽带、冷凝水带、热油带和原始油带,依据4个带抵达生产井的时间,可以将蒸汽驱划分为蒸汽启动阶段、产量快速递增阶段、高产稳产阶段和快速减产衰竭开采阶段等4个阶段,且每个阶段主控机理各不相同;水平井"脚跟"到"脚尖"注入蒸汽的干度和压力逐渐降低,引起沿水平井段温度场发育不均匀;纵向上温度场发育变化特征表明,水平井蒸汽驱以水平驱替为主,纵向泄油为辅。
The influences of the well patterns are notably significant for the development effects of the block.In the light of the following problems at the late period of the horizontal well steam flooding in the heavy oil reservoirs:rather poorer production of the interwell remained oil,becoming serious for the huff-puff effects and so on,the rational well patterns are researched for the above wells converted from huff-puff to steam flooding,and moreover the planar and vertical development characteristics of the temperature field are analyzed.The numerical simulation results show that row drive pattern possesses the best effects for the steam flooding;the aerial development characteristics analyses indicate that four belts can be divided for the wells inverted from injection to production:saturated steam zone,condensed water zone,hot oil zone and original oil zone.According to the reaching time of every belt to the producer,the steam flooding can be classified into four stages:starting,rapid increase of the production,high and stable yield and fast decrease and depletion,and moreover the main controlling mechanisms are various for each stage;the dryness fraction and pressure of the injected steam from the "heel"to "toe"of the horizontal well are gradually reduced,the temperature fields along the horizontal well intervals are uneven;the characteristics of the field development change show that for the steam flooding of the horizontal well,the planar displacement is the principal form,while the vertical drainage is auxiliary.

关键词(KeyWords)： 稠油;蒸汽驱;物理模拟;井网优化;数值模拟;驱替特征
heavy oil;steam flooding;physical simulation;well pattern optimization;numerical simulation;flooded/displaced characteristic

Abstract:

Keywords:

基金项目(Foundation): 中国石化重大科技攻关项目“水平井蒸汽驱物理模拟与数值模拟”(P12016)

作者(Author): 何应付,王海涛,伦增珉,赵清民
HE Yingfu,WANG Haitao,LUN Zengmin,ZHAO Qingmin

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