台灣北部某氣層原始氣體埋藏量探討

The Estimation of Original Gas in Place for a Gas Reservoir in Northern Taiwan

曾繼忠(Jin-Jong Tzeng) ； 吳偉智(Wei-Jr Wu) ； 黃瑞鴻(Raey-Hong Huang) ； 陳大麟(Ta-Lin Chen)

《鑛冶：中國鑛冶工程學會會刊》 45卷1期 (2001/03) Pp. 105-112

https://doi.org/10.30069/MM.200103_45(1).0010

摘要

本研究之某氣層於今（89）年應用新的震測技術發現新的地質構造，此外為求釐清地層間之連通性也進行一些井測，而且長期以來該氣層之原始氣體埋藏量與其採收率間未能具有合理之相關性，基於上述緣由，本研究乃蒐集該氣田之相關資料與歷年來各井油氣之生產數據，配合前述新資料，重新評估其原始埋藏量，探討其採收率之合理性，並嘗試釐清該氣層與其下層之連通性。本研究是採用物質平衡法來估算原始埋藏量，並且與傳統的體積法計算的結果相比較，以証明其準確性。本研究經由物質平衡法及傳統的體積法所估算之原始氣體埋藏量具一致性之結果，其埋藏量約為20.1億立方公尺，採收率約為82%，對部分（弱）水驅型氣層尚屬合理。此外，由A號井之井底靜壓量測結果進行分析可知，A號井之生產層（下層）並未與某氣層連通。

關鍵字

原始氣體埋藏量 ； 物質平衡法 ； 體積法 ； 水驅型氣田

並列摘要

In one gas reservoir, new seismic interpretation recently has been performed. A new fault was found. Research was then done to evaluate the OGIP and recovery factor by using the most recent production data and new structure map. Identification of communication between upper and lower production layers was also performed. Whetter the upper layer communicate with lower one or not was a problem needed to be clarified in this gas reservoir. To estimate OGIP, the theory of material balance was applied. A commercial software, MBAL, was used to get tile optimum match for these data and to calculate OGIP. Also, a traditional method, volumetric calculation, was calculated based on reservoir area. Thickness and porosity residual water saturation. Our results show the OGIP is around 20.1 BCM from both methods, which means the results having high confidence. The recovery factor of 82% is reasonable for a weak water drive reservoir. From pressure data analysis, it is shown there is no communication between upper and lower production layers.

並列關鍵字

Original gas in place ； Material balance ； Volume metric method ； Water drive reservoir