海上多层常规稠油油藏层间干扰影响因素研究
发布时间：2019-05-06 20:52
【摘要】：在多层油藏合采开发过程中,层间干扰现象必然存在。海上稠油的开发,由于受到平台条件和环境因素限制,多针对可进行注水开发的常规稠油通过大段合采的方式进行。稠油油藏中较大的油水黏度差异将导致层间干扰现象更加明显,而大段合采带来诸多因素的层间非均质,使得层间干扰更为严重。 针对上述问题,本文对多层常规稠油油藏开发过程中各层间非均质因素对层间干扰影响规律进行了以下研究： (1)为了研究层间干扰动态过程,从衰竭开采方式入手在拟稳定状态下对产量进行劈分,研究层间干扰发生过程及各层间非均质因素对层间干扰的影响规律； (2)通过Eclipse数值模拟软件建立注水开发方式下多层合采和分采模型,对比开发过程中各层的产油量、产水量、贡献率、采出程度以及比采油指数等指标,分析各层间非均质因素对层间干扰的影响过程,通过分析计算找到各因素级差与层间干扰系数的关系； (3)通过正交试验设计多因素对层间干扰综合影响研究方案,分析多因素综合影响下层间干扰系数与各因素单独作用时层间干扰系数之间的关系,通过最小二乘法进行多元回归,从而对该类油藏建立层间干扰的层间非均质表征体系。 通过本文的研究取得了以下认识： (1)多层合采油藏开发过程中由于井筒沟通各储层,导致各层压力相互平衡,带来层间干扰。 (2)在注水开发的多层合采油藏中,由于各层性质存在差异,初期吸水多的油层流体总黏度下降幅度大,使该层渗流能力进一步增加,从而增大层间差异,加剧层间干扰。 (3)多层合采油藏注水开发过程中,某一层突破见水将对其他合采层产生严重干扰。由于稠油油藏油水黏度差异大,多层合采过程中见水带来的层间干扰更加显著。 利用本文方法对绥中36-1油田典型井进行层系优化方案优选,评价各方案层间干扰影响大小,通过该油藏数值模拟模型对各个方案进行预测,结果表明,本文方法优选方案比其他方案开发效果更好,利用该方法能够对绥中36-1油田类似的高渗常规稠油油藏中多因素影响层间干扰影响大小进行简便、快速的评估。
[Abstract]:In the process of multi-layer reservoir production and development, the phenomenon of interlayer interference is bound to exist. The development of offshore heavy oil is limited by platform conditions and environmental factors, and the conventional heavy oil which can be developed by water injection is carried out through the way of large section co-production. The large difference of oil-water viscosity in heavy oil reservoir will lead to more obvious interlayer interference, and the interlayer interference is more serious because of the heterogeneity of interlayer which is caused by many factors in large-section combined production. In order to solve the above problems, the influence of interlayer heterogeneity factors on interlayer interference in the development of multi-layer conventional heavy oil reservoirs is studied as follows: (1) in order to study the dynamic process of interlayer interference, In order to study the interlayer interference process and the influence of different interlayer heterogeneity factors on the interlayer interference, the yield is split under the quasi-stable state from the failure mining mode. (2) through the Eclipse numerical simulation software, the multi-layer combined production model and the separate production model under the water injection development mode are established, and the oil production, water production, contribution rate, recovery degree and specific oil recovery index of each layer in the development process are compared. The influence process of heterogeneous factors on interlayer interference is analyzed, and the relationship between the order difference of each factor and the interlayer interference coefficient is found out through the analysis and calculation. (3) through the orthogonal experiment to design the research scheme of multi-factor influence on the interlayer interference, the relationship between the interlayer interference coefficient and the interlayer interference coefficient is analyzed when the multi-factor synthetically affects the interlayer interference coefficient. By using the least square method to carry out multiple regression, an interlayer heterogeneous representation system of interlayer interference is established for this kind of reservoir. Through the research in this paper, the following knowledge has been obtained: (1) in the process of multi-layer reservoir development, the wellbore communicates with each reservoir, which leads to the balance of the pressure of each layer and the interlayer interference. (2) in the multi-layer oil reservoir developed by water injection, due to the difference of the properties of each layer, the total viscosity of the reservoir fluid with more water absorption in the initial stage decreases greatly, which further increases the percolation capacity of the reservoir, thereby increasing the inter-layer difference and aggravating the inter-layer interference. (3) in the process of water injection development in multi-layer reservoir, a breakthrough of water-seeing layer will cause serious interference to other co-production zones. Because of the big difference of oil-water viscosity in heavy oil reservoir, the interlayer interference caused by water in multi-layer production is more obvious. This method is used to optimize the strata system of typical wells in Suizhong 36m1 Oilfield, and to evaluate the influence of interlayer interference. The numerical simulation model of the reservoir is used to predict each scheme, and the results show that: This method can be used to evaluate the influence of multi-factors on interlayer interference in similar high permeability conventional heavy oil reservoirs in Suizhong 36 ~ (1) oilfield, where the development results are better than those of other schemes in this paper. The method can be used to evaluate the influence of multi-factors on interlayer interference in similar high permeability heavy oil reservoirs.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE53
本文编号：2470486
[Abstract]:In the process of multi-layer reservoir production and development, the phenomenon of interlayer interference is bound to exist. The development of offshore heavy oil is limited by platform conditions and environmental factors, and the conventional heavy oil which can be developed by water injection is carried out through the way of large section co-production. The large difference of oil-water viscosity in heavy oil reservoir will lead to more obvious interlayer interference, and the interlayer interference is more serious because of the heterogeneity of interlayer which is caused by many factors in large-section combined production. In order to solve the above problems, the influence of interlayer heterogeneity factors on interlayer interference in the development of multi-layer conventional heavy oil reservoirs is studied as follows: (1) in order to study the dynamic process of interlayer interference, In order to study the interlayer interference process and the influence of different interlayer heterogeneity factors on the interlayer interference, the yield is split under the quasi-stable state from the failure mining mode. (2) through the Eclipse numerical simulation software, the multi-layer combined production model and the separate production model under the water injection development mode are established, and the oil production, water production, contribution rate, recovery degree and specific oil recovery index of each layer in the development process are compared. The influence process of heterogeneous factors on interlayer interference is analyzed, and the relationship between the order difference of each factor and the interlayer interference coefficient is found out through the analysis and calculation. (3) through the orthogonal experiment to design the research scheme of multi-factor influence on the interlayer interference, the relationship between the interlayer interference coefficient and the interlayer interference coefficient is analyzed when the multi-factor synthetically affects the interlayer interference coefficient. By using the least square method to carry out multiple regression, an interlayer heterogeneous representation system of interlayer interference is established for this kind of reservoir. Through the research in this paper, the following knowledge has been obtained: (1) in the process of multi-layer reservoir development, the wellbore communicates with each reservoir, which leads to the balance of the pressure of each layer and the interlayer interference. (2) in the multi-layer oil reservoir developed by water injection, due to the difference of the properties of each layer, the total viscosity of the reservoir fluid with more water absorption in the initial stage decreases greatly, which further increases the percolation capacity of the reservoir, thereby increasing the inter-layer difference and aggravating the inter-layer interference. (3) in the process of water injection development in multi-layer reservoir, a breakthrough of water-seeing layer will cause serious interference to other co-production zones. Because of the big difference of oil-water viscosity in heavy oil reservoir, the interlayer interference caused by water in multi-layer production is more obvious. This method is used to optimize the strata system of typical wells in Suizhong 36m1 Oilfield, and to evaluate the influence of interlayer interference. The numerical simulation model of the reservoir is used to predict each scheme, and the results show that: This method can be used to evaluate the influence of multi-factors on interlayer interference in similar high permeability conventional heavy oil reservoirs in Suizhong 36 ~ (1) oilfield, where the development results are better than those of other schemes in this paper. The method can be used to evaluate the influence of multi-factors on interlayer interference in similar high permeability heavy oil reservoirs.
【学位授予单位】：西南石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE53
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