水驅氣層出水之研究

A Numerical Simulation of Water Coning in A Water-drive Gas Reservoir

沈淑瑤(S. Y. Shen) ； 謝秉志(B.Z. Hsieh) ； 曾繼忠(C.C. Tseng) ； 林再興(Z.S. Lin)

《鑛冶：中國鑛冶工程學會會刊》 52卷2期 (2008/06) Pp. 68-77

https://doi.org/10.30069/MM.200806_52(2).0007

摘要

本研究的主要目的是利用數值模擬法，研究水驅型天然氣層（T－氣層）之產氣井之臨界產率及水錐貫穿時間。本研究建立三維數值模式，考慮不同的貫穿深度、邊界距離、水驅力量大小及毛細壓力的影響，研究T－氣層的三個斷塊之五口生產井在不同產率下之水錐貫穿時間，而得無因次水錐貫穿時間典型曲線圖，並與現場出水時間資料擬合。結果顯示，不同斷塊之無因次水錐貫穿時間曲線結果不同；在同一斷塊內，不同砂層厚度、水侵影響、貫穿比例及地質條件，其無因次水錐貫穿時間曲線也不同。根據擬合的結果，本研究可預測生產井之臨界產率；若生產井之生產大於臨界產率，亦可藉此典型曲線，推估生產井之出水時間。

關鍵字

水錐 ； 臨界產率 ； 水錐貫穿時間 ； 三維數值模擬

並列摘要

The purpose of this study is to study critical production rate and coning breakthrough time in the water drive TCS gas reservoir using a numerical simulator. We developed a 3-D numerical simulation model by considering different penetration ratios, boundary radius, strength of water drive, and capillary pressure. It was used to simulate the performance of five producing wells located in three fault blocks. Type curves of dimensionless breakthrough time were constructed using the simulation results. The type curve is different for different wells. Even in the same block, for different formation thickness, strength of water drive, penetration ratios and boundary radius, the type curves are different. The critical producing rate of a producing well and the breakthrough time can be estimated by using the type curves derived in this study.

並列關鍵字

Water Conning ； Critical rate ； Coning Breakthrough Time ； 3-D Numerical Simul