Multi-layer horizontal wells development for tight sandstone gas reservoir： Case study of tight gas reservoir model zone in Ordos Basin
Received date: 2020-10-14
Revised date: 2020-11-22
Online published: 2021-04-09
Supported by
The China National Science & Technology Major Project(2016ZX05050)
There are more tight gas sandstone reservoirs in China. However， tight gas reservoirs are characterized by strong heterogeneous， low well productivity and it’s difficult to develop efficiently. Tight gas reservoir model zone in Ordos Basin with He 8 and Shan 1 multi-layer is studied as an example for enhancing well productivity， improving reserves producing degree and exploring efficient development model. Multi-layer horizontal wells development technologies are proposed. Firstly， feature of every layer is characterized finely and sweet point evaluation is done by 3D geologic and seismic model； Secondly， He 8 and Shan 1 layers are nominated and laid out in model zone for horizontal well development by formation optimized. Thirdly， length of gas-bearing sand to horizontal section ratio increased efficiently via geo-seismic steering. Length of gas-bearing sand to horizontal section ratio is 10% higher compared to adjacent field. The average AOF of horizontal wells is 0.873 million cube meters per day based on these technologies. Efficient development of tight gas reservoir is achieved.
Hua WANG , Yue-hua CUI , Xue-ling LIU , Zhen-zhen QIANG , Shi-cheng WANG . Multi-layer horizontal wells development for tight sandstone gas reservoir： Case study of tight gas reservoir model zone in Ordos Basin[J]. Natural Gas Geoscience, 2021 , 32(4) : 472 -480 . DOI: 10.11764/j.issn.1672-1926.2020.11.021
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