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Comprehensive judgment method of low production causes in tight gas reservoirs——Taking the LX gas reservoir in Ordos Basin as an example
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Ren-Shi Niea, *, Peidong Qiua, Jingcheng Liub, c, **, Bin Liud, Zhangxin Chene, f, Cong Lua, Fan-Hui Zenga
Petroleum Research | 2026, 11(2) : 529 - 544
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Petroleum Research | 2026, 11(2): 529-544
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Comprehensive judgment method of low production causes in tight gas reservoirs——Taking the LX gas reservoir in Ordos Basin as an example
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Ren-Shi Niea, *, Peidong Qiua, Jingcheng Liub, c, **, Bin Liud, Zhangxin Chene, f, Cong Lua, Fan-Hui Zenga
Affiliations
  • aNational Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China
  • bLiquor Making Microbial Application & Detection Technology of Luzhou Key Laboratory, Luzhou Vocational & Technical College, Luzhou, 646000, China
  • cInstitute of Petroleum & Gas Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China
  • dNortheastern Sichuan Gas District, PetroChina Southwest Oil & Gas Field Company, Dazhou, 635000, China
  • eDepartment of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada
  • fEastern Institute of Technology, Ningbo, 315200, China
Published: 2026-06-10 doi: 10.1016/j.ptlrs.2025.11.002
Outline
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The low production of tight gas reservoirs arises from complex and multifaceted causes, and elucidating these factors is crucial for guiding the formulation of effective stimulation strategies. Conventional analytical methods predominantly emphasize the role of individual factors, thereby lacking necessary systematic and integrative perspective to comprehensively reveal underlying mechanisms of poor well performance. To overcome these limitations, a comprehensive diagnostic approach is proposed to identify controlling factors of low production in multilayer tight gas reservoirs. Taking three typical cluster well groups of LX tight gas reservoirs in the Ordos Basin as examples, the causes for the low production of the gas wells were analyzed from different aspects by using geological, engineering, and developmental data after excluding the special reasons such as defects in drilling and completion process, reservoir water lock, and water floding. The results show that the main causes for the low production of gas wells in LX reservoirs include fewer exploited gas layers, poor physical properties, poor fracturing and fracture making effects, and insufficient formation energy. In addition, corresponding treatment measures such as reperforation and refracturing were proposed. Finally, effects of the measures in the two low-yield wells where the reperforation was implemented were analyzed: the production and Tubing-head pressure increased significantly, and the low-yield wells were transformed into non-low-yield wells with good results. The results of the measures demonstrate the feasibility of the new method.

Tight gas  /  Low-yield well  /  Low production cause  /  Cluster well group  /  Reperforation  /  Refracturing
Ren-Shi Nie, Peidong Qiu, Jingcheng Liu, Bin Liu, Zhangxin Chen, Cong Lu, Fan-Hui Zeng. Comprehensive judgment method of low production causes in tight gas reservoirs——Taking the LX gas reservoir in Ordos Basin as an example[J]. Petroleum Research, 2026 , 11 (2) : 529 -544 . DOI: 10.1016/j.ptlrs.2025.11.002
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Funding
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  • National Natural Science Foundation of China (NSFC)(52374044; 52374045)
  • Southwest Petroleum University
  • Fund of Research and Innovation Project for Postgraduates(2022KYCX024)
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Year 2026 volume 11 Issue 2
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Article Info
doi: 10.1016/j.ptlrs.2025.11.002
  • Receive Date：2025-03-21
  • Online Date：2026-07-29
  • Published：2026-06-10
Article Data
Affiliations
History
  • Received：2025-03-21
  • Revised：2025-10-30
  • Accepted：2025-11-11
Funding
National Natural Science Foundation of China (NSFC)(52374044; 52374045)
Southwest Petroleum University
Fund of Research and Innovation Project for Postgraduates(2022KYCX024)
Affiliations
    aNational Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, China
    bLiquor Making Microbial Application & Detection Technology of Luzhou Key Laboratory, Luzhou Vocational & Technical College, Luzhou, 646000, China
    cInstitute of Petroleum & Gas Engineering, Chongqing University of Science and Technology, Chongqing, 401331, China
    dNortheastern Sichuan Gas District, PetroChina Southwest Oil & Gas Field Company, Dazhou, 635000, China
    eDepartment of Chemical and Petroleum Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada
    fEastern Institute of Technology, Ningbo, 315200, China

Corresponding:

*

E-mail addresses: (R.-S. Nie)

**

Liquor Making Microbial Application & Detection Technology of Luzhou Key Laboratory, Luzhou Vocational & Technical College, Luzhou, CN-646000, China. (J. Liu).
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表12种不同金属材料的力学参数
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多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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