致密油藏CO2驱综合效益评价

蔺丽君; 杨正明; 王学武; 何英; 廖作才

doi:10.3981/j.issn.1000-7857.2015.15.005

科技导报 >

2015 , Vol. 33 >Issue 15: 38 - 42

DOI: https://doi.org/10.3981/j.issn.1000-7857.2015.15.005

研究论文

致密油藏CO₂驱综合效益评价

蔺丽君 ,
杨正明 ,
王学武 ,
何英 ,
廖作才

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1. 中国科学院渗流流体力学研究所, 廊坊065007;
2. 中国石油勘探开发研究院廊坊分院, 廊坊065007;
3. 克拉玛依职业技术学院, 克拉玛依833600

蔺丽君,博士研究生,研究方向为低渗/致密油藏分段压裂水平井开发,电子信箱:linlijun-12345@163.com

收稿日期: 2015-05-08

修回日期: 2015-06-15

网络出版日期: 2015-08-28

基金资助

国家油气重大专项(2011ZX05013-006);中国石油天然气集团公司重大基础攻关课题(2014B-1203)

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Comprehensive benefits evaluation of CO₂ displacement in tight oil reservoirs exploitation

LIN Lijun ,
YANG Zhengming ,
WANG Xuewu ,
HE Ying ,
LIAO Zuocai

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1. Institute of Porous Flow and Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China;
2. PetroChina Research Institute of Petroleum Exploration and Development-Langfang, Langfang 065007, China;
3. Karamay Vocational & Technical College, Karamay 833600, China

Received date: 2015-05-08

Revised date: 2015-06-15

Online published: 2015-08-28

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摘要

致密油藏储量大,开发成本高,实现经济开发至关重要。以C 油田致密油藏典型区块为例,采用直井—水平井联合布井方式,通过数值模拟,讨论了5 种不同渗透率级别、8 种排距下CO₂驱的开发效果,结合经济评价指标分析不同油价下CO₂驱的经济效益。研究表明,当前油价下,渗透率在0.1×10^-3～1×10^-3 μm²时,建议C 油田致密油藏典型区块采用注CO₂开发方式;缩小排距,采出程度提高,内部收益率降低,建议根据C 油田开发方针和原则选择合适的排距;增加生产年限,累计采出程度提高,经济效益呈现降低趋势,建议C 油田根据自身情况需要选择合理的生产年限。

关键词： 致密油藏; 注CO₂; 直井—水平井

本文引用格式

蔺丽君 , 杨正明 , 王学武 , 何英 , 廖作才 . 致密油藏CO₂驱综合效益评价[J]. 科技导报, 2015 , 33(15) : 38 -42 . DOI: 10.3981/j.issn.1000-7857.2015.15.005

Abstract

Tight oil reservoir has big geological reserves but its exploitation is of high cost, so how to achieve economic exploitation has gradually been received attention. In this paper, we take the C oil field as an example, and adopt the combination well spacing of vertical and horizontal wells to establish a geologic model, then discuss the exploitation effect of CO₂ displacement under five different permeability levels and eight different row spacing distributions. Finally, we deeply analyze the economic benefit of CO₂ displacement under different oil prices with the help of economic evaluation criteria. Through the above research, we obtain the following conclusions: When the permeability is between 0.1×10^-3 μm² and 1×10^-3 μm², the C oil company should choose the CO₂ displacement exploitation rather than waterflooding under the current oil price; although decreasing the row spacing will enhance oil recovery, it will decrease the economic benefit, so the C oil company should adopt the appropriate row spacing according to their own current situation; prolonging the productive life will increase the production rate of recovery, but that is no good to the economic benefit, so the C oil company should choose the appropriate productive life by self-condition.

Key words： tight oil reservoirs; CO₂ displacement; vertical and horizontal wells

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