底水油藏高含水期剩余油挖潜可视化驱油实验  

The Visual Oil Displacement Experiment of Residual Oil at High Water-cut Stage in Bottom-water Reservoir

作　　者：冯鑫 廖浩奇 李丰辉 汪周华[2] 王聚锋 FENG Xin;LIAO Hao-qi;LI Feng-hui;WANG Zhou-hua;WANG Ju-feng(Caofeidian Operation Company of China National Offshore Oil Corp., Ltd., Tanggu 300459, China;State Key Laboratory of Oil and Gas Reservoir Geology and Development Engineering, Southwest Petroleum University, Chengdu 610500, China)

机构地区：[1]中海石油(中国)有限公司曹妃甸作业公司,塘沽300459 [2]西南石油大学油气藏地质及开发工程国家重点实验室,成都610500

出　　处：《科学技术与工程》2021年第22期9315-9321,共7页Science Technology and Engineering

基　　金：国家自然科学基金(51836003)。

摘　　要：C油田馆陶组油藏为强底水油藏,储层物性具有高孔、高渗特征,经过长期天然能量开采,整体进入高含水开发阶段,亟待探索新的补充能量方式,提高剩余油动用程度。为实现油藏开发过程模拟的可视化,结合油藏实际情况,设计了满足几何相似条件的物理胶结模型和两组不同介质(活性水,气体和泡沫交替)驱替实验,利用X射线安检机直观了解岩层中流体渗流情况、底水锥进现象以及剩余油分布特征。研究表明:大尺寸平板模型实验能够直观地描述底水油藏水锥形态;2组实验在初始底水驱阶段水驱规律相同,水驱采收率达到42%,波及范围有限,井间和顶部剩余油富集;活性水驱阶段提高采收率0.73%,剩余油动用程度不高,顶部剩余油富集;气体和泡沫交替驱可有效动用井间和顶部剩余油,较水驱提高采收率2.14%。The Guantao Formation is the main oil-bearing horizon of the C oil field with good physical properties,high porosity and high permeability.After long-term production with natural energy,it has entered a development stage with high water cut.So it is urgent to explore new ways to supplement energy and increase the utilization degree of residual oil.In order to visualize the simulation of the reservoir development process and combined with the actual situation of the reservoir,a physical cementation model that met geometric similar conditions and two sets of displacement experiments with different media(active water,foam alternating gas)were designed.The X-ray machine was used to intuitively understand the fluid flow,coning phenomenon of the bottom water,and the distribution characteristics of residual oil in the rock formations.The research show that:the experiments with large-scale slab models can intuitively describe the coning state of water in the bottom-water reservoirs.Two sets of experiments have the same water flooding laws during the initial bottom-water flooding stage,with the recovery degree of 42%.The range of displacement of bottom water is limited with the enrichment of residual oil among the wells and at the top.The oil recovery in the active-water flooding stage is enhanced by 0.73%with the low utilization degree of residual oil,and the enrichment of the residual oil at the top.The recovery in the foam alternating gas flooding stage is enhanced by 2.14%,and the residual oil among the wells and at the top is effectively displaced.

关 键 词：大尺寸岩板 物理模型 底水锥进 电子计算机断层扫描(CT)技术 井间剩余油 

分 类 号：TE341[石油与天然气工程—油气田开发工程]