摘要
致密砂岩气藏具有低孔、低渗,储层物性差,非均质性强等地质特征,在岩性构造背景下,气水关系复杂,地层中气水赋存状态多样。烃类充注成藏时,很难将地层中的水完全驱替出来,会有部分滞留水残存在地层中。对于不存在边底水、层间水等自由水的致密砂岩气藏,储层中的可动水是气井产水的主要来源。气井见水将严重影响气井的产能和泄流半径,导致井底压力和产量迅速下降,生产压差和废弃压力显著增加,缩短了气井生产周期。为此,调研了国内外学者对致密砂岩储层可动水赋存状态和产出机理、可动水产出规律及控制因素、可动水对储层渗流能力影响等多方面的研究方法及成果,在分析和总结目前研究成果的基础上,针对致密砂岩气藏开发过程中的产水问题及其对开发的影响,提出了下一步的研究方向及改进建议,以期改善致密砂岩气藏的开发效果,提高最终采出程度。
Tight sandstone gas reservoirs have low-porosity,low-permeability,poor reservoir properties and strong heterogeneity.Under the gentle structure background,the gas-water relationship is complex,and the occurrence of water in the stratum is diverse.When hydrocarbons fill into stratum,it’s difficult to displace the water completely,some of the water remained.For some tight sandstone gas reservoirs where there is no free water,the movable water in the formation is the main source of water production.Water appears in the gas well will seriously affect the productivity and discharge radius of gas wells,leading to a rapid decline in bottom hole pressure and production,increasing production pressure difference and waste pressure significantly,shortening the life cycle about gas well and reducing the final recovery of gas reservoirs.This paper investigates the research of scholars at domestic and foreign,including occurrence and outputs mechanism of movable water,production rules and controlling factors of movable water,influence of movable water on reservoir percolation capacity.According to the understanding of the current research results,the next research direction and suggestions for improvement of production measures are proposed to improve the development effect of tight sandstone gas reservoirs and the final recovery.
作者
张杰
李熙喆
高树生
叶礼友
刘华勋
朱文卿
方飞飞
Zhang Jie;Li Xi-zhe;Gao Shu-sheng;Ye Li-you;Liu Hua-xun;Zhu Wen-qing;Fang Fei-fei(University of Chinese Academy of Sciences,Beijing 100190,China;Department of Porous Flow&Fluid Mechanics,PetroChina Research Institute of Petroleum Exploration&Development,Langfang 065007,China;CNPC Research Institute of Science and Technology,Beijing 100083,China;School of Petroleum Engineering,Chongqing University of Science and Technology,Chongqing 401331,China)
出处
《天然气地球科学》
EI
CAS
CSCD
北大核心
2019年第10期1519-1530,共12页
Natural Gas Geoscience
基金
国家自然科学联合基金项目“超深层天然气藏开发基础理论研究”（编号：U1762216）资助
关键词
致密砂岩气藏
可动水
渗流能力
赋存状态
产水机理
Tight sandstone gas reservoirs
Movable water
Occurrence state
Percolation capacity
Mechanism of water production
作者简介
张杰(1995-),男,安徽宿州人,博士在读,主要从事致密气藏开发及渗流机理研究.E-mail:zhangjie161@mails.ucas.ac.cn;通讯作者:李熙喆,E-mail:zhangjie161@mails.ucas.ac.cn.
