多层砂岩油田热采油藏管理提高采收率

doi:10.7657/XJPG20240109

摘要/Abstract

摘要：

概述了美国科恩河油田多层砂岩稠油油藏的特征和开发历史，重点讨论了强化热采油藏管理提高采收率的实践。科恩河油田为水动力圈闭的单斜油藏，蒸汽驱开采后期，碳氧比能谱测井、四维时移热采动态及注采井动态监测结果，孤立单河道砂体识别、追踪，全油田三维地质建模及数值模拟研究为识别剩余油和提高采收率提供了依据。人工智能、蒸汽泡沫驱、双油管完井分层注蒸汽等措施扩大了蒸汽驱波及体积。加密井、水平井钻井及浅部油藏侧钻水平井可大幅度增加可采储量，水平井产量达到相邻直井的3倍以上。为开采油藏下倾部位油水界面附近未动用的“冷油藏”，在下倾部位水层钻产水井泄压，使蒸汽驱得以有效波及到该部位剩余油。

关键词: 科恩河油田, 稠油, 多层砂岩油藏, 蒸汽驱, 提高采收率, 热采油藏管理, 水平井, 人工智能

Abstract:

This paper presents the characteristics and development history of the multi-layered sandstone heavy oil reservoirs in the Kern River field，USA，and specifically discusses the practices of thermally recovered reservoir management and enhanced oil recovery (EOR). The Kern River field is a monocline reservoir of hydrodynamic trap. In the late stage of steam flooding，the practices such as C/O spectral logging，4D time-lapse dynamic surveillance during thermal recovery，injector-producer performance monitoring，isolated single-channel sandbody identification and tracking，and full-field 3D geological modeling and numerical simulation lay a basis for identifying remaining oil and enhancing oil recovery. Artificial intelligence，steam-foam flooding，and layered steam injection through dual-tubing completion are proved technologies for expanding the swept volume of steam flooding. Infill drilling，horizontal well drilling，and horizontal sidetracking in shallow oil reservoirs provide additional opportunities for significantly increasing the recoverable reserves. These technologies enable the production of horizontal well to be more than three times that of adjacent vertical wells. To exploit “cold reservoirs” near the oil-water contact in the downdip zone of the reservoir，water producers are drilled in the downdip aquifer zone to release reservoir pressure，allowing the remaining oil in this zone to be effectively swept by steam.

Key words: Kern River field, heavy oil, multi-layered sandstone reservoir, steam flooding, EOR, thermally recovered reservoir management, horizontal well, artificial intelligence

中图分类号:

TE345

吕晓光, 李伟. 多层砂岩油田热采油藏管理提高采收率[J]. 新疆石油地质, 2024, 45(1): 65-71.

LYU Xiaoguang, LI Wei. Thermally Recovered Reservoir Management and EOR for a Multi-Layered Sandstone Oilfield[J]. Xinjiang Petroleum Geology, 2024, 45(1): 65-71.

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