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

Abstract

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

CLC Number:

TE357

Lina LIU,Ting YIN,Xiaojie ZHENG, et al. 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.

Figures/Tables 4

Fig. 1

Table 1

Ground production data of well-B by comprehensive splitting method"

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

Table 1

Table 2

Table 3

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储层类型	流体类型	类比法	经验公式法	递减法
砂岩	凝析气	45.0~85.0	66.30	29.75
砂岩	凝析油	22.0~39.0	30.3~32.4	22.96
砂岩	原油		38.30	12.28
砂岩	溶解气			12.05

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

A new method to ground production split of condensate gas cap reservoirs with strong bottom water in Tahe Oilfield

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