Geologic thresholds and its gas-controlling function during forming process of tight sandstone gas reservoir

doi:10.7623/syxb201001008

Editorial office of ACTA PETROLEI SINICA ›› 2010, Vol. 31 ›› Issue (1): 49-54.DOI: 10.7623/syxb201001008

• Petroleum Exploration • Previous Articles Next Articles

Geologic thresholds and its gas-controlling function during forming process of tight sandstone gas reservoir

JIANG Fujie 1,2,3 PANG Xiongqi 1,2 WU Li 1,2

Received:2009-01-23 Revised:2009-04-15 Online:2010-01-25 Published:2010-05-21
Contact: JIANG Fujie

致密砂岩气藏成藏过程中的地质门限及其控气机理

姜福杰 1,2,3 庞雄奇 1,2 武丽 1,2

1中国石油大学盆地与油藏研究中心北京 102249； 2中国石油大学油气资源与探测国家重点实验室北京 102249； 3新疆大学地质与勘查工程学院新疆乌鲁木齐 830046

通讯作者: 姜福杰

Abstract

Abstract:

Based on the geological features of bound water film with fixed thickness, the change law and controlling factors of fluids in reservoirs during forming period of the tight sandstone gas reservoirs were analyzed. Three geologic thresholds in the forming process of tight sandstone gas reservoir, including gas injection threshold, gas saturation threshold and gas termination threshold, were established. The corresponding concept model and calculation model were set up and used to predict the tight sandstone gas reservoirs in the Upper Palaeozoic of Ordos Basin. The results indicated that the correspondence depths of three geologic thresholds were 2350m, 2850m and 4800m respectively. The liquid distribution characteristics predicted by using above geologic model are in good agreement with those of actual reservoirs, which indicates that this model can be used to accurately predict the liquid distribution in the tight sandstone gas reservoir.

Key words: Ordos Basin, tight sandstone gas reservoir, reservoir-forming process, fluid distribution, geologic threshold, calculation model

摘要：

基于束缚水膜厚度不变的地质特征，通过对致密砂岩气藏储层的孔隙空间演化和流体变化规律分析，确定了致密砂岩气藏成藏过程中的3个地质门限，即天然气充注门限、天然气饱和门限和天然气终止门限，建立了相应的概念模型和计算模型，并就其对致密砂岩气藏的流体分布的影响和控制进行了系统的阐述。利用该模型对鄂尔多斯盆地上古生界致密砂岩气藏的预测结果表明，3个地质门限的对应深度分别为2350m、2850m 和 4800m。经实际气藏剖面的正反检验表明，该模型对于预测致密砂岩气藏的流体分布具有较高准确性。

关键词: 鄂尔多斯盆地, 致密砂岩气藏, 成藏过程, 流体分布, 地质门限, 计算模型

JIANG Fujie PANG Xiongqi WU Li . Geologic thresholds and its gas-controlling function during forming process of tight sandstone gas reservoir[J]. Editorial office of ACTA PETROLEI SINICA, 2010, 31(1): 49-54.

姜福杰庞雄奇武丽 . 致密砂岩气藏成藏过程中的地质门限及其控气机理[J]. 石油学报, 2010, 31(1): 49-54.

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Geologic thresholds and its gas-controlling function during forming process of tight sandstone gas reservoir

致密砂岩气藏成藏过程中的地质门限及其控气机理

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