New Integrated History Matching Approach for Vertical Coal Seam Gas Wells in the KN Field, Surat Basin, AustraliaClick to copy article linkArticle link copied!
- Lijiang Duan*Lijiang Duan*Email: [email protected]PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, ChinaMore by Lijiang Duan
- Fengde Zhou
- Zhaohui XiaZhaohui XiaPetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, ChinaMore by Zhaohui Xia
- Liangchao QuLiangchao QuPetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, ChinaMore by Liangchao Qu
- Jie YiJie YiPetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, ChinaMore by Jie Yi
Abstract
In order to obtain a reliable production forecast for the coal seam gas wells, a history matching was usually conducted to calibrate the simulated water and gas rates to the observed values. This paper presents a case study of history matching vertical coal seam gas wells from the KN Field in the Surat Basin, Australia via a new integrated approach. This approach includes two steps, i.e., determining the key parameters for history matching on the basis of the uncertainty and sensitivity analyses first, and then history matching the observed production data starting from the field level to the local area level to the individual well level. This approach has two significant technical novelties: (1) the range of parameters was defined as the constraint and (2) the direction and extent of production response were considered when modifying the parameters in the history matching. In the study area, satisfactory history matching results were achieved for all 66 wells, which have been produced for 10 or more years, after running only 34 simulation cases. Some practicable strategies were also proposed in this study to overcome the challenges of the history matching task for a coal seam gas field. Results show that the distributions of the final parameters from history matching are consistent with the actual reservoir conditions of this area. These strategies can provide reference for the simulation work of other unconventional gas reservoirs.
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