油砂SAGD开发后期转火驱数值模拟

发布时间：2018-05-07 19:09

本文选题：油砂 + 火驱　；参考：《断块油气田》2017年06期

【摘要】：当蒸汽辅助重力泄油(SAGD)开发进入平台期末时,日产油量降低,汽油比急剧升高,在蒸汽腔发育的楔形区域存在大量剩余油,造成热量的损失,并降低了开发的经济性。文中提出了SAGD开发后期转火驱的接替方式,基于加拿大某油砂区块储层、流体特征建立数值模拟机理模型,将蒸汽腔波及至油层顶部边缘位置时作为转火驱的开发时机,利用在SAGD井两侧添加的垂直注气井排与原水平生产井分别作为火驱开发的注、采井,对转驱开发进行油藏数值模拟研究。结果表明:转驱开发分为4个阶段,即气驱次生水期、火驱见效期、火驱稳产期以及产量递减期;转驱采出程度达到20.9%,平均空气油比仅为788 m~3/m~3,最终采收率达到82.1%。该研究对于油砂高效开发具有积极的推动作用。
[Abstract]:At the end of the development of steam assisted gravity oil discharge (SAGD), the daily oil production decreases and the gasoline ratio increases sharply. There is a large amount of residual oil in the wedge region of steam chamber development, which results in the loss of heat and reduces the economy of development. In this paper, the replacement mode of turn-fire flooding in the late stage of SAGD development is put forward. Based on a reservoir in an oil sand block in Canada, a numerical simulation mechanism model is established. When the steam cavity is swept to the top edge of the reservoir, it is used as the development opportunity of the turn-fire drive. The vertical gas injection well and the horizontal production well added on both sides of SAGD well are used as injection and production wells for fire drive development respectively. The reservoir numerical simulation of the conversion development is carried out. The results show that there are four stages in the conversion development, that is, the gas drive secondary water generation stage, the fire drive effective stage, the fire drive stable production stage and the production decline stage, and the recovery degree of the conversion drive reaches 20.9, the average air-oil ratio is only 788 mm ~ (3) / m ~ (3), and the final oil recovery is up to 82.1%. The research has a positive effect on the high-efficiency development of oil sand.
【作者单位】：中海油研究总院;海洋石油高效开发国家重点实验室;
【基金】：国家科技重大专项课题“海上稠油热采技术”(2016ZX05025-004);国家科技重大专项专题“油砂SAGD开发地质油藏评价及方案优化技术”(2016ZX05031-003-004)
【分类号】：TE357.44

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