Occurrence and distribution characteristics of fluids in tight sandstone reservoirs in the Shilijiahan zone, northern Ordos Basin
High-yield gas layers, low-yield gas layers and (gas bearing) water layers of Upper Paleozoic coexist in the Shilijiahan zone in the northern Ordos Basin, but gas–water distribution characteristics, laws and influence factors are not understood well, so the exploration and development of natural gas...
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doaj-91883f54742b4291ab4d8dd1a5fdf3e62021-04-02T06:59:53ZengKeAi Communications Co., Ltd.Natural Gas Industry B2352-85402017-05-014317418110.1016/j.ngib.2017.08.002Occurrence and distribution characteristics of fluids in tight sandstone reservoirs in the Shilijiahan zone, northern Ordos BasinGongqiang Li0Yulin Chen1Huichong Jia2Yonggang Zhao3Ruijie Xie4Sihong Liu5Li Li6Yangtze University, Wuhan, Hubei 430100, ChinaYangtze University, Wuhan, Hubei 430100, ChinaExploration and Development Research Institute, Sinopec North China Company, Zhengzhou, Henan 450006, ChinaWell Logging Company of Sinopec North China Petroleum Engineering Company, Xinxiang, Henan 453700, ChinaYangtze University, Wuhan, Hubei 430100, ChinaExploration and Development Research Institute, Sinopec North China Company, Zhengzhou, Henan 450006, ChinaThe Second Geology and Mineral Resource Survey Institute, Henan Provincial Bureau of Geology & Mineral Resources, Zhengzhou, Henan 450001, ChinaHigh-yield gas layers, low-yield gas layers and (gas bearing) water layers of Upper Paleozoic coexist in the Shilijiahan zone in the northern Ordos Basin, but gas–water distribution characteristics, laws and influence factors are not understood well, so the exploration and development of natural gas in this zone are restricted. In this paper, statistical analysis was carried out on the data of Upper Paleozoic formation water in this zone, e.g. salinity, pH value and ion concentration. It is shown that the formation water in this zone is of CaCl2 type. Then, the origin, types, controlling factors and spatial distribution characteristics of formation water were figured out by using core, mud logging, well logging and testing data, combined with the classification and evaluation results of geochemical characteristics of formation water. Besides, the logging identification chart of gas, water and dry layers in this zone was established. Finally, the occurrence and distribution laws of reservoir fluids were defined. The formation water of CaCl2 type indicates a good sealing capacity in this zone, which is favorable for natural gas accumulation. It is indicated that the reservoir fluids in this zone exist in the state of free water, capillary water and irreducible water. Free water is mainly distributed in the west of this zone, irreducible water in the east, and capillary water in the whole zone. The logging identification chart has been applied in many wells in this zone like Well Jin 86. The identification result is basically accordant with the gas testing result. It is verified that gas and water layers can be identified effectively based on this logging identification chart.http://www.sciencedirect.com/science/article/pii/S235285401730092XOrdos BasinShilijiahan zoneLate PaleozoicTight sandstoneReservoir fluidOccurrenceDistribution characteristicControlling factorGas and water layerLogging identification chart |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Gongqiang Li Yulin Chen Huichong Jia Yonggang Zhao Ruijie Xie Sihong Liu Li Li |
spellingShingle |
Gongqiang Li Yulin Chen Huichong Jia Yonggang Zhao Ruijie Xie Sihong Liu Li Li Occurrence and distribution characteristics of fluids in tight sandstone reservoirs in the Shilijiahan zone, northern Ordos Basin Natural Gas Industry B Ordos Basin Shilijiahan zone Late Paleozoic Tight sandstone Reservoir fluid Occurrence Distribution characteristic Controlling factor Gas and water layer Logging identification chart |
author_facet |
Gongqiang Li Yulin Chen Huichong Jia Yonggang Zhao Ruijie Xie Sihong Liu Li Li |
author_sort |
Gongqiang Li |
title |
Occurrence and distribution characteristics of fluids in tight sandstone reservoirs in the Shilijiahan zone, northern Ordos Basin |
title_short |
Occurrence and distribution characteristics of fluids in tight sandstone reservoirs in the Shilijiahan zone, northern Ordos Basin |
title_full |
Occurrence and distribution characteristics of fluids in tight sandstone reservoirs in the Shilijiahan zone, northern Ordos Basin |
title_fullStr |
Occurrence and distribution characteristics of fluids in tight sandstone reservoirs in the Shilijiahan zone, northern Ordos Basin |
title_full_unstemmed |
Occurrence and distribution characteristics of fluids in tight sandstone reservoirs in the Shilijiahan zone, northern Ordos Basin |
title_sort |
occurrence and distribution characteristics of fluids in tight sandstone reservoirs in the shilijiahan zone, northern ordos basin |
publisher |
KeAi Communications Co., Ltd. |
series |
Natural Gas Industry B |
issn |
2352-8540 |
publishDate |
2017-05-01 |
description |
High-yield gas layers, low-yield gas layers and (gas bearing) water layers of Upper Paleozoic coexist in the Shilijiahan zone in the northern Ordos Basin, but gas–water distribution characteristics, laws and influence factors are not understood well, so the exploration and development of natural gas in this zone are restricted. In this paper, statistical analysis was carried out on the data of Upper Paleozoic formation water in this zone, e.g. salinity, pH value and ion concentration. It is shown that the formation water in this zone is of CaCl2 type. Then, the origin, types, controlling factors and spatial distribution characteristics of formation water were figured out by using core, mud logging, well logging and testing data, combined with the classification and evaluation results of geochemical characteristics of formation water. Besides, the logging identification chart of gas, water and dry layers in this zone was established. Finally, the occurrence and distribution laws of reservoir fluids were defined. The formation water of CaCl2 type indicates a good sealing capacity in this zone, which is favorable for natural gas accumulation. It is indicated that the reservoir fluids in this zone exist in the state of free water, capillary water and irreducible water. Free water is mainly distributed in the west of this zone, irreducible water in the east, and capillary water in the whole zone. The logging identification chart has been applied in many wells in this zone like Well Jin 86. The identification result is basically accordant with the gas testing result. It is verified that gas and water layers can be identified effectively based on this logging identification chart. |
topic |
Ordos Basin Shilijiahan zone Late Paleozoic Tight sandstone Reservoir fluid Occurrence Distribution characteristic Controlling factor Gas and water layer Logging identification chart |
url |
http://www.sciencedirect.com/science/article/pii/S235285401730092X |
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