摘要
以柴达木盆地第四系疏松砂岩气藏为研究对象,根据气藏纵向多层强非均质、边水活跃等特征,建立多层边水水侵气藏开采物理模拟实验方法。选用气藏天然岩心进行“串并联”组合构建实验模型再现气藏多层地质特征,通过室内仿真模拟气藏衰竭开采全过程,实现气藏无水侵、水侵无绕流和水侵绕流3种情景下一井四层合采生产模拟研究。可视化监测恒压边水水体沿不同渗透率储层水侵过程,分析了气井配产大小对水侵路径及水侵前缘推进速度的影响,明确了边水非均匀水侵发生后对气藏产能、采收率以及残余气赋存特征的影响,揭示了该类气藏边水沿高渗层非均匀突进和水封气形成的机理,为该类气田制定合理控水开发措施提供依据。
The Quaternary unconsolidated sandstone gas reservoir in the Qaidam Basin is characterized by multiple layers,strong heterogeneity and active edge-water.Based on these characteristics,a physical simulation experiment method for production from multi-layer edge-water gas reservoirs was proposed.In this method,the experimental models were established by using natural cores in series and parallel connection to show geological characteristics of multi-layer gas reservoirs.According to the indoor simulation results of the whole depletion production process,an experimental study on four layers commingled production in one well was conducted under three scenarios of gas reservoirs without the water invasion,with the water invasion without flow,and with the water invasion with flow.In this study,by visually monitoring the water invasion process of constant pressure edge water body along layers with different permeability,and quantitatively analyzing the influence of gas well production allocation on water invasion path and advancing speed of water invasion front,the influence of non-uniform edge water invasion on gas reservoir productivity,recovery factors and residual gas occurrence characteristics was clarified,and the mechanism of non-uniform edge-water invasion along high permeability layers and formation of water sealed gas were revealed.The findings of this study can provide a basis for reasonable water control for this type of gas fields.
作者
胡勇
李熙喆
江良冀
万玉金
郭长敏
焦春艳
柴小颖
敬伟
徐轩
周梦飞
贾玉泽
HU Yong;LI Xizhe;JIANG Liangji;WAN Yujin;GUO Changmin;JIAO Chunyan;CHAI Xiaoying;JING Wei;XU Xuan;ZHOU Mengfei;JIA Yuze(PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China;Exploration and Development Research Institute,PetroChina Qinghai Oilfield Company,Dunhuang 736202,China;University of Chinese Academy of Sciences,Beijing 100190,China)
出处
《天然气地球科学》
CAS
CSCD
北大核心
2022年第9期1499-1508,共10页
Natural Gas Geoscience
基金
国家科技重大专项“疏松砂岩气藏长期稳产技术”(编号:2016ZX05015-004)
中国石油集团公司重大专项“大型碳酸盐岩气田控水提高采收率技术研究”(编号:2021DJ15)联合资助
关键词
柴达木盆地
疏松砂岩气藏
多层合采
水侵规律
开发机理
物理模拟
Qaidam Basin
Loose sandstone gas reservoir
Multi-layer combined mining
Water intrusion law
Development mechanism
Physical simulation
作者简介
胡勇(1978-),男,重庆黔江人,高级工程师,博士,主要从事天然气开发实验与基础理论应用研究.E-mail:huy69@petrochina.com.cn;通信作者:李熙喆(1966-),男,河北唐山人,教授级高级工程师,博士,主要从事天然气开发综合研究.E-mail:lxz69@petrochina.com.cn;通信作者:江良冀(1993-),男,辽宁昌图人,硕士研究生,主要从事天然气开发实验与基础理论应用研究.E-mail:jiangliangj69@petrochina.com.cn.
