| 天然气充注导致储层增压的定量研究 |
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| 引用本文： | 刘一锋,姚倩颖,谢增业,邱楠生.天然气充注导致储层增压的定量研究[J].现代地质,2013,27(5):1211-1218. |
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| 作者姓名： | 刘一锋 姚倩颖 谢增业 邱楠生 |
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| 作者单位： | 中国石油大学（北京）油气资源与探测国家重点实验室，北京 102249 |
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| 基金项目： | 国家科技重大专项(2011ZX05007-002)；国家“973”项目(2011CB201101)。 |
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| 摘 要： | 超压对于油气勘探具有重要的意义。以天然气为载体的压力传递是储层超压的重要成因机制。由于地层水和原油对于天然气的溶解性和压缩性存在明显差异，造成了含水地层和油层在天然气充注过程中具有不同压力演化路径。本研究模拟计算不同原始孔隙流体的地层在受到甲烷充注时的压力演化，建立了甲烷充注量与超压的定量关系，进而探讨天然气充注增压的影响因素。结果表明：天然气充注在一定条件下可以造成地层压力的增大；不同原始孔隙流体的储层压力演化路径不同。原始孔隙流体为天然气的地层最先出现超压，但增压缓慢；含水层比含油层增压迅速，更易形成超压；同等封闭条件下，浅部地层比深部地层更易形成超压，高温盆地比低温盆地更易形成超压。
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| 关 键 词： | 储层 天然气充注 超压 定量模型 影响因素 |
| 收稿时间： | 2013-06-15 |
| 修稿时间： | 2013-06-20 |
Quantitative Study on Pressure Evolution During Gas Charging to Reservoirs |
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| LIU Yi-Feng
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YAO Qian-Ying
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XIE Zeng-Ye
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QIU Nan-Sheng.Quantitative Study on Pressure Evolution During Gas Charging to Reservoirs[J].Geoscience——Journal of Graduate School,China University of Geosciences,2013,27(5):1211-1218. |
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| Authors: | LIU Yi-Feng YAO Qian-Ying XIE Zeng-Ye QIU Nan-Sheng |
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| Institution: | State Key Laboratory of Petroleum Resources and Prospecting ,China University of Petroleum，Beijing 102249 |
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| Abstract: | Overpressure plays an important role in oil and gas exploration. Pressure transfer with gas charging is a dominant overpressure mechanism in reservoirs. Because of the tremendous difference in gas solubility and compressibility between formation water and oil, there are different pressure evolutions in the aquifer and the oil layer. In this paper pressure changes caused by methane filling in reservoirs with different kinds of initial pore were simulated. And the quantitative relationship between volume of charged methane and overpressure was established. Then the influencing factors of pressure evolution during gas chargingwere analyzed.The results indicate the following aspects:gas charging could cause increase of pressure in reservoirs; pressue evolution paths are different with different initial pore fluids; strong overpressure is easier to form in aquifer than in oil-bearing formation; in the same sealing condition, it is easier to form ovepressure in shallow strata than in deep strata as well as in high tempeature basin than in low temperature basin. |
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| Keywords: | reservoir gas charging overpressure quantitative model influencing factor |
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