頁岩氣生產特徵及激勵採收特性之研究

A Study of Production Characteristic and Productivity of Hydraulically Fractured Shale Gas Reservoirs

林柏廷(P. T. Lin) ； 楊慈容(T. R. Yang) ； 謝秉志(B. Z. Hsieh) ； 林再興(Z. S. Lin)

《鑛冶：中國鑛冶工程學會會刊》 58卷3期 (2014/09) Pp. 112-122

https://doi.org/10.30069/MM.201409_58(3).0010

摘要

本研究的主要目的是研究液裂裂縫參數如：裂縫半長度，裂縫組數，裂縫寬度，基質吸附氣體對於頁岩氣層生產行為影響。模型分為單孔隙，雙孔隙以及雙孔隙考慮吸脫附。本研究使用數值模擬進行液裂裂縫參數之敏感性分析，並使用Arps產率遞降曲線分析數值模擬生產資料。液裂裂縫敏感性分析結果顯示：（1）液裂裂縫越長，裂縫組數越多，且裂縫寬度越寬時有較高產率遞降速度且線性流結束時間較早。（2）暫態流動期間遞降指數（b值）介於2.7至2.2間，偽穩態流動期間遞降指數（b值）介於0.3至0。（3）基質內有無存在吸附氣體對於遞降指數（b值）影響不大。

關鍵字

Arps產率遞降曲線 ； 水力液裂 ； 頁岩氣地層 ； 緻密砂岩氣地層 ； 非傳統氣層

並列摘要

We used single-porosity and dual-porosity reservoir models to investigate the effects of hydraulic fracture parameters, such as fracture half length, fracture spacing, and number of fracture, and absorbed gas in matrix on the production behavior of shale gas reservoirs. A series of reservoir simulations was performed for a sensitivity analysis accounting for hydraulic fracture parameters on the production behavior. The adaptability of Arps decline curve analysis was tested by considering the effects of the characteristics of fractures. The sensitivity analysis results showed that a greater fracture length, higher number of fracture, and wider fracture spacing lead to a higher initial decline rate and an earlier end of linear flow time. The decline exponent ＂(b-value)＂ ranged from 2.7 to 2.2 for transient flow regime and from 0.3 to zero for boundary dominated flow regime. The effect of adsorbed gas on the b-value was negligible.

並列關鍵字

Arps decline curve ； Hydraulic fracturing ； Shale gas ； Tight gas ； Unconventional gas resources