基于时移微重力监测技术的SAGD蒸汽腔扩展规律研究

doi:10.7657/XJPG20240606

摘要/Abstract

摘要：

为揭示稠油油藏蒸汽辅助重力泄油（SAGD）蒸汽腔扩展规律，利用时移微重力监测技术，对新疆重油油田H井区侏罗系齐古组稠油油藏的蒸汽腔扩展规律进行研究。通过时移微重力监测获取了反映油藏剩余密度的剩余重力异常数据，利用该数据进行三维最小二乘反演，确定了蒸汽腔的纵向分布，并提出了解释蒸汽腔扩展规律与剩余重力异常关系的方法。该方法能够有效解释H井区5个井组蒸汽腔的扩展规律，把蒸汽腔的演变过程划分为上升阶段、横向扩展阶段及向下扩展阶段，并利用井温监测验证了该方法的准确性与可靠性。该方法揭示了SAGD蒸汽腔在油藏中的扩展规律，为稠油油藏的高效开发提供了技术支持，有助于优化稠油油藏的生产调控措施，也为同类型油藏开发提供了理论和实践基础。

关键词: 稠油油藏, 时移微重力, 蒸汽辅助重力泄油, 蒸汽腔, 扩展规律, 重力异常, 剩余密度

Abstract:

To reveal expansion pattern of steam chambers in heavy oil reservoirs during steam-assisted gravity drainage (SAGD), the time-lapse microgravity monitoring technology was employed to investigate the expansion pattern of SAGD steam chambers in the heavy oil reservoirs of the Jurassic Qigu formation in the H well block of the Xinjiang oilfield. This technology provided residual gravity anomaly data reflecting the remaining density of the reservoir. Using these data, a 3D least-squares inversion was performed to accurately depict the vertical distribution of the steam chambers. Furthermore, a method for interpreting the relationship between the steam chamber expansion pattern and residual gravity anomalies was proposed. The results indicate that the evolution of the steam chambers can be divided into three stages: rising, lateral expansion, and downward expansion. The proposed method can effectively explain the expansion patterns of the steam chambers in five well groups in the H well block, and its accuracy and reliability were validated with well temperature data. The method reveals the expansion patterns of the SAGD steam chambers in the reservoirs, providing a technical support for the efficient development of heavy oil reservoirs and aiding in the optimization of production control measures. It also offers a theoretical and practical foundation for similar reservoir development.

Key words: heavy oil reservoir, time-lapse microgravity, steam-assisted gravity drainage, steam chamber, expansion pattern, gravity anomaly, residual density

中图分类号:

TE345

郑爱萍, 刘欢, 黄后传, 赵婧含, 杨登杰, 马建强, 李玄. 基于时移微重力监测技术的SAGD蒸汽腔扩展规律研究[J]. 新疆石油地质, 2024, 45(6): 680-686.

ZHENG Aiping, LIU Huan, HUANG Houchuan, ZHAO Jinghan, YANG Dengjie, MA Jianqiang, LI Xuan. Research on Expansion Patterns of SAGD Steam Chambers Based on Time-Lapse Microgravity Monitoring Technology[J]. Xinjiang Petroleum Geology, 2024, 45(6): 680-686.

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模型编号	模型直径/ km	中心点坐标/ （km，km，km）	顶面深度/ km
1号球体	0.05	（0，0，-0.18）	0.18
2号球体	0.02	（1.45，1.45，-0.20）	0.20
3号球体	0.10	（1.05，1.05，-0.19）	0.19
4号水平长圆柱体	0.02	（1.25，1.93，-0.53）	0.19
5号水平长圆柱体	0.02	（1.25，0.98，-0.53）	0.19