缝洞型碳酸盐岩油藏注氮气泡沫可行性及影响因素
发布时间：2018-12-20 17:27
【摘要】：为了研究缝洞型碳酸盐岩油藏注氮气泡沫可行性及影响因素,研制了缝洞型碳酸盐岩油藏细观物理模型和宏观剖面可视化物理模型,可由细观到宏观对缝洞型油藏注泡沫可行性及其影响因素进行室内物理模拟。细观物理模型实验结果表明:水驱后,剩余油主要以封闭孔洞内剩余油、阁楼油、绕流油和油膜的形式存在;氮气泡沫能通过重力分异及阻力效应启动阁楼油与绕流油并剥离油膜。在宏观剖面可视化物理模型上进行了注泡沫影响因素研究。实验结果表明:在含油饱和度较低时,以低部位井注、高部位井采(低注高采)的方式注泡沫效果更好,注泡沫时机不宜过早,宜在充分水驱的基础上转注泡沫;底水能量过强则不利于注泡沫,同时存在一个最优的泡沫注入量。对于碳酸盐岩缝洞型油藏开采中后期,注泡沫开采能够有效维持高效开发,提高原油采收率。
[Abstract]:In order to study the feasibility and influencing factors of nitrogen foam injection in fractured and cavernous carbonate reservoir, a meso-physical model and a macroscopic section visualization physical model were developed. The feasibility of injection foam and its influencing factors can be simulated in laboratory from meso to macroscopically. The results of meso-physical model experiments show that after water flooding, the remaining oil mainly exists in the form of residual oil, loft oil, flow oil and oil film in the closed hole. Nitrogen foam can activate attic oil and circumfluence oil and strip oil film through gravity differentiation and drag effect. The influencing factors of foam injection are studied on the physical model of macroscopic profile visualization. The experimental results show that when the oil saturation is low, the foam injection is better in the low position well injection, the high part well production (low injection and high production) method, and the foam injection timing should not be premature, and the foam injection should be changed on the basis of sufficient water flooding. Too strong bottom water energy is not conducive to foam injection, and there is an optimal foam injection rate. In the middle and late stage of carbonate fracture-cavity reservoir production, foam injection can effectively maintain high efficiency development and improve oil recovery.
【作者单位】： 中国石油大学提高采收率研究院 中国石油化工股份有限公司海相油气藏开发重点实验室 中国石油大学石油工程教育部重点实验室
【基金】：国家重大科技专项(2011ZX05014-003) 国家重点基础研究发展计划(973)项目(2011CB201006)资助
【分类号】：TE357.7
[Abstract]:In order to study the feasibility and influencing factors of nitrogen foam injection in fractured and cavernous carbonate reservoir, a meso-physical model and a macroscopic section visualization physical model were developed. The feasibility of injection foam and its influencing factors can be simulated in laboratory from meso to macroscopically. The results of meso-physical model experiments show that after water flooding, the remaining oil mainly exists in the form of residual oil, loft oil, flow oil and oil film in the closed hole. Nitrogen foam can activate attic oil and circumfluence oil and strip oil film through gravity differentiation and drag effect. The influencing factors of foam injection are studied on the physical model of macroscopic profile visualization. The experimental results show that when the oil saturation is low, the foam injection is better in the low position well injection, the high part well production (low injection and high production) method, and the foam injection timing should not be premature, and the foam injection should be changed on the basis of sufficient water flooding. Too strong bottom water energy is not conducive to foam injection, and there is an optimal foam injection rate. In the middle and late stage of carbonate fracture-cavity reservoir production, foam injection can effectively maintain high efficiency development and improve oil recovery.
【作者单位】： 中国石油大学提高采收率研究院 中国石油化工股份有限公司海相油气藏开发重点实验室 中国石油大学石油工程教育部重点实验室
【基金】：国家重大科技专项(2011ZX05014-003) 国家重点基础研究发展计划(973)项目(2011CB201006)资助
【分类号】：TE357.7
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