苏北不同类型油藏CO2驱开发模式及经济效益评价

doi:10.13809/j.cnki.cn32-1825/te.2021.06.010

摘要/Abstract

摘要：

CO₂驱技术在国外应用广泛,而国内应用规模相对较小,重要因素是其技术和经济指标备受考验。以近年苏北小断块油藏CO₂驱项目为例,分析了CO₂吞吐、低渗油藏同步气驱、气顶驱、气水交替、中高渗油藏CO₂复合驱等开发模式,及其经济效益与影响因素。苏北实践表明CO₂驱项目经济效益与注入成本和换油率密切相关,各开发模式经济效益有一定差异但总体较好,特别是低渗低含水油藏通过气顶驱及气水交替驱效果较佳。

关键词: 低渗油藏, 中高渗, CO₂驱, CO₂复合驱, 苏北, 效益评价

Abstract:

CO₂-EOR has been widely used in foreign countries, but rare in China because of technical and economic factors. Taking the CO₂ flooding project of the small fault block reservoir in Subei basin as an example, the development modes of huff-n-puff, synchronous gas injection, gas cap flooding, gas-water alternation, CO₂combined flooding in medium and high permeability reservoirs are summarized, and economic benefits and influencing factors are analyzed. The practice in Subei basin shows that the economic benefits of CO₂ flooding projects are closely related to the injection cost and utilization of CO₂. The economic benefits of various development models are different but overall are good, which play a better performance in low permeability and low water cut oil reservoirs through gas cap flooding and gas-water alternate flooding.

Key words: low permeability reservoir, mid-high permeability, CO₂ flooding, CO₂ composite flooding, Subei, economic evaluation

中图分类号:

TE341

吴公益,赵梓平,吴波. 苏北不同类型油藏CO₂驱开发模式及经济效益评价[J]. 油气藏评价与开发, 2021, 11(6): 864-870.

Gongyi WU,Ziping ZHAO,Bo WU. CO₂ flooding development models and economic benefit evaluation of different types of reservoirs in Subei basin[J]. Petroleum Reservoir Evaluation and Development, 2021, 11(6): 864-870.

图/表 9

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井号	注入轮次	CO₂注入量（t）	日产油量（t）		含水率（%）		累计增油量（t）
井号	注入轮次	CO₂注入量（t）	吞吐前	吞吐后	吞吐前	吞吐后	累计增油量（t）
XB1P1	1	1 000	0.45	9.00	94	6	723
	2	1 000	0.45	6.39	94	12	345
	3	200	0.78	3.06	91	15	103
	4	1 020	0.08	1.05	99	85	158
XB3P2	1	617	0	4.90	94	10	526
XB3P2	2	310	0.11	3.80	99	16	191
XB3P3	1	1 000	0.57	7.00	91	10	561
XB3P3	2	1 000	0.60	3.78	91	11	764
XB3P6	1	2 007	0.60	14.00	96	11	626
	2	1 049	0.60	4.36	96	13	209
	3	324	0.23	0.60	98	95	90

油田	油藏类型	含水阶段	开发技术	注入量（10⁴ t）	增油（10⁴ t）	注入成本（元/t）	销售均价（美元/桶）	吨油运行成本（元）	静态现金流入（万元）	矿场换油率（t/t）	边际效益极限换油率（t/t）	矿场实际边际效益极限油价（美元/桶）
ZJD	低渗	低含水	混相驱	9.08	3.22	321	60.0	475	2 476	0.36	0.18	35
TN	低渗	高含水	气水交替驱	9.80	2.31	251	56.5	728	1 765	0.24	0.15	52
ZC	中高渗	高含水	CO₂复合驱	1.37	0.86	851	64.0	414	1 064	0.62	0.36	37
JN	致密	低含水	异步吞吐	0.65	0.82	503	54.0	663	1 143	1.25	0.24	23
XB	稠油	高含水	复合吞吐	0.95	0.45	309	50.0	635	452	0.47	0.15	28

苏北不同类型油藏CO₂驱开发模式及经济效益评价

CO₂ flooding development models and economic benefit evaluation of different types of reservoirs in Subei basin

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