考虑沿程非均匀吸汽下SAGD产能预测模型

发布时间：2018-05-13 20:16

本文选题：蒸汽辅助重力泄油(SAGD) + 数学模型　；参考：《中国石油大学学报(自然科学版)》2017年04期

【摘要】：蒸汽辅助重力泄油(SAGD)相比于其他热采方法对稠油开发效果更好。目前常用的SAGD产能预测模型主要基于沿程均匀吸汽提出,矿场应用困难。针对这个问题,对SAGD沿程生产过程进行试验研究,基于试验获得沿程非均匀吸汽现象,结合达西定律、热传导定律及物质平衡方程,推导出新的SAGD产能预测模型。结果表明:三维SAGD开发物理过程比二维SAGD更加复杂;所建立的新模型在产能预测上比以往的模型更加准确;以往在二维剖面上将SAGD划分为蒸汽腔上升、蒸汽腔横向扩展及蒸汽腔下降3个阶段,但是在更加符合矿场实际的包含沿程方向的三维角度,这个阶段划分方式并不适用;蒸汽干度是影响双水平井SAGD沿程蒸汽分布的一个重要因素。
[Abstract]:Steam assisted gravity discharge (SAGD) is better than other thermal recovery methods for heavy oil development. At present, the commonly used SAGD productivity prediction model is mainly based on the uniform absorption of steam, and the field is difficult to apply. In view of this problem, the experimental research on the production process of SAGD along the process is carried out based on the non uniform vapor absorption in the test along the test, combined with Darcy. The new SAGD productivity prediction model is derived from the law, the heat conduction law and the matter equilibrium equation. The results show that the physical process of the 3D SAGD development is more complex than that of the two-dimensional SAGD; the new model is more accurate than the previous model, and the SAGD is divided into the steam chamber rising, the steam cavity lateral expansion and the cross section on the two-dimensional section. The steam cavity falls in 3 stages, but this stage is not suitable for the three dimensional angle which is more in line with the field, including the direction of the field, and the steam dryness is an important factor affecting the distribution of the steam in the SAGD of a double horizontal well.

【作者单位】：中国石油大学石油工程教育部重点实验室;中海石油(中国)有限公司天津分公司;
【基金】：“十三五”国家重大科技专项(2016ZX05031-003-005)
【分类号】：TE328

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