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- Title
致密砂岩气藏产水机理及其对渗流能力的影响.
- Authors
张杰; 李熙喆; 高树生; 叶礼友; 刘华勋; 朱文卿; 方飞飞
- Abstract
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 oc⁃ currence of water in the stratum is diverse. When hydrocarbons fill into stratum,it's difficult to displace the wa⁃ ter completely,some of the water remained. For some tight sandstone gas reservoirs where there is no free wa- ter,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 re- search of scholars at domestic and foreign,including occurrence and outputs mechanism of movable water,pro- duction rules and controlling factors of movable water,influence of movable water on reservoir percolation ca- pacity. According to the understanding of the current research results,the next research direction and sugges- tions for improvement of production measures are proposed to improve the development effect of tight sandstone gas reservoirs and the final recovery.
- Subjects
GAS reservoirs; GLOW discharges; GAS wells; RESERVOIRS; WATER-gas; SANDSTONE
- Publication
Natural Gas Geoscience, 2019, Vol 30, Issue 10, p1519
- ISSN
1672-1926
- Publication type
Article
- DOI
10.11764/j.issn.1672-1926.2019.03.017