产量不稳定分析在元坝气田的应用

doi:10.13809/j.cnki.cn32-1825/te.2021.04.023

Abstract

Abstract:

The reef gas reservoir of Changxing Formation in Yuanba Gas Field is an ultra-deep gas reservoir with bottom water and high sulfur content, and it is in the early stage of stable production. The dynamic monitoring shows that the risk of water invasion in the development of gas reservoir is high, which brings great challenges to the dynamic analysis of gas reservoir. Combined with the actual geological characteristics and production status of Yuanba Gas Field, the daily production and pressure data are fully used to carry out the application analysis of the yield instability analysis method （Agarwal Gardner, Blasingame, NPI, etc.）. The results show that this method can be applied to analyze the reservoir dynamic parameters, gas well dynamic productivity, dynamic reserves and water invasion identification of the gas reservoir in Changxing Formation Yuanba Gas Field. The obtained results are highly reliable, which is helpful to deepen the understanding of the geological characteristics of gas reservoirs, solve the production problems, and further guide the dynamic analysis of gas reservoirs.

Key words: rate-transient analysis, yield instability analysis, Blasingame curve, dynamic analysis, Yuanba Gas Field

CLC Number:

TE344

XUN Wei,WANG Bencheng,YANG Lijuan,ZHANG Mingdi,WEN Shanzhi,GAO Shunhua. Application of rate-transient analysis in Yuanba Gas Field[J].Petroleum Reservoir Evaluation and Development, 2021, 11(4): 652-658.

Figures/Tables 10

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References 23

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测试日期	解释模型	地层压力（MPa）		地层系数（10^-3 μm²·m）	有效渗透率（10^-3 μm²）	表皮系数	垂向渗透率比水平渗透率	井筒储存（m³/MPa）	复合半径（m）	两区流度比
测试日期	解释模型	压力计	产层中部	地层系数（10^-3 μm²·m）	有效渗透率（10^-3 μm²）	表皮系数	垂向渗透率比水平渗透率	井筒储存（m³/MPa）	复合半径（m）	两区流度比
2017年7月	变井储+表皮+ 水平井+径向复合		55.05	69.1	1.15	-6.49	0.31	2.77	201	4.47
2018年9月	水平井+径向复合	49.83	50.47	69.9	1.16	-6.54	0.61	2.72	191	1.34
2020年2月	水平井+径向复合	46.31	46.89	78.5	1.31	-6.79	0.58	2.55	212	1.5

分析方法	测试日期	解释模型	地层压力（MPa）	地层系数（10^-3 μm²·m）	有效渗透率（10^-3 μm²）	表皮系数	垂向渗透率比水平渗透率（K_z/K_r）	动态储量（10⁸ m³）
不稳定产量分析	2020年3月	水平井+均质油藏+圆形边界	47.60	72.2	1.20	-2	0.568	27.9
试井分析	2020年2月	水平井+径向复合	46.89	78.5	1.31	-6.79	0.580

Application of rate-transient analysis in Yuanba Gas Field

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