塔河油田强底水凝析气顶油藏地面产量劈分的新方法

doi:10.13809/j.cnki.cn32-1825/te.2020.02.011

摘要/Abstract

摘要：

塔河油田强底水凝析气顶油藏是由气顶、油层及大底水组成的砂岩油气藏,在开发过程中,因气顶和底油采出不均衡,导致气窜或油窜,开发效果较差。针对塔河油田T区块块状底水气顶油藏的实际生产状况,综合考虑生产过程中气油比与密度的变化,探索了一种劈分气顶、油藏地面产量的新方法——单井生产阶段综合劈分法,应用此方法分别计算了气顶油藏的原油、凝析油、凝析气、溶解气的采收率,分别为12.28 %、22.96 %、29.75 %、12.05 %,将计算结果与国内外同类油气藏相比较,认为比较符合该类油藏的开发特点,而且现场操作较为简单。通过气顶油藏采收率的计算,了解气顶、油藏的开发状况,及时发现开发中存在的问题及区块的开发潜力,以便于更合理地开发气顶油藏。

关键词: 凝析气顶油藏, 原油, 凝析油, 凝析气, 溶解气, 产量劈分

Abstract:

The strong bottom water condensate gas cap reservoirs in Tahe Oilfield is the sandstone reservoir composed of gas cap, oil reservoir and large scale of bottom water. In the process of development, gas channeling or oil channeling exists due to the uneven production of gas cap and bottom oil, and the development effect is poor. According to the actual production situation of gas cap reservoirs with massive bottom water in block T of Tahe oilfield, and considering the gas-oil ratio and density changes in the production process, a new method to split gas cap and reservoir ground production, integrated splitting method for single-well production stage, is explored. By this method, recovery rates of crude oil, condensate, condensate gas and dissolved gas in gas cap reservoirs are calculated, which are 12.28 %, 22.96 %, 29.75 % and 12.05 %, respectively. The calculated results are compared to that of the similar reservoirs at home and abroad, and it is found that they are matching the development characteristics of such reservoirs, and the field operation is relatively simple. Through the calculation of the oil recovery for the gas cap reservoirs, the development status is understood, and the problems existing in the development and the development potential of the block are timely discovered, so as to develop gas cap oil reservoir more reasonably.

Key words: condensate gas cap reservoir, crude oil, condensate oil, condensate gas, solution gas, production split

中图分类号:

TE357

刘丽娜,印婷,郑小杰,马新平,刘蕊,谢爽. 塔河油田强底水凝析气顶油藏地面产量劈分的新方法[J]. 油气藏评价与开发, 2020, 10(2): 65-70.

LIU Lina,YIN Ting,ZHENG Xiaojie,MA Xinping,LIU Rui,XIE Shuang. A new method to ground production split of condensate gas cap reservoirs with strong bottom water in Tahe Oilfield[J]. Reservoir Evaluation and Development, 2020, 10(2): 65-70.

图/表 4

图1

表1

B井采用综合劈分法劈分地面产量数据"

年度	ρ_o/ （g·cm^-3）	ρ_c/ （g·cm^-3）	ρ_m/ （g·cm^-3）	GOR/ （m³·m^-3）	$V o m$ / 10⁴ m³	$V o o$ / 10⁴ m³	$V g s /$ 10⁴ m³	$V o c$ / 10⁴ m³	$V g c /$ 10⁴ m³	单井生产阶段划分
2006	0.860	0.763	0.777 0	1791	1.78	0.19	33	1.59	3 152	凝析气—混合生产
2007	0.860	0.763	0.828 6	884	2.07	1.39	238	0.68	1 591	混合生产
2008	0.860	0.763	0.846 8	726	0.83	0.69	119	0.13	481	混合生产
2009	0.860	0.763	0.855 1	1 198	0.31	0.29	50	0.02	289	混合生产
2010	0.860	0.763	0.854 5	1 247	0.12	0.11	19	0.01	126	混合生产
2011	0.860	0.763	0.853 9	1 568	0.04	0.03	6	0.00	29	混合生产
2012	0.860	0.763	0.850 9	1 022	0.23	0.21	36	0.02	183	混合生产
2013	0.860	0.763	0.823 3	600	0.11	0.07	12	0.04	56	混合生产
2014	0.860	0.763		237	0.06	0.06	14	0.00	0	原油生产
2015	0.860	0.763		227	0.31	0.31	70	0.00	0	原油生产
2016	0.860	0.763		2 252	0.03	0.00	0	0.03	67	凝析气生产
合计					5.88	3.36	598	2.53	5 974

表1

表2

表3

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区块名称	采收率/%				备注
区块名称	凝析气	凝析油	原油	溶解气	备注
塔河油田T区块	29.75	22.96	12.28	12.05	先采气,衰竭开采,目前含水90 %
板桥板中板二凝析气藏	47.90	31.90	12.84		先采气,衰竭开采采收率
濮城西区沙二上凝析油气藏	51.20		16.00		先采油,地层压力为l0 MPa时
西塞门特油气田（美）	69.70		13.40		先采气,衰竭开采采收率
卡拉达克Ⅶ凝析气藏（苏）	95.00	42.50	10.00		先采气,最终采收率
斯捷普诺夫凝析气田（苏）	83.00		16.00		先采油,开发晚期