Comprehensive benefits evaluation of CO2 displacement in tight oil reservoirs exploitation

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

doi:10.3981/j.issn.1000-7857.2015.15.005

Science & Technology Review >

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

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

Articles

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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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

Cite this article

LIN Lijun , YANG Zhengming , WANG Xuewu , HE Ying , LIAO Zuocai . Comprehensive benefits evaluation of CO₂ displacement in tight oil reservoirs exploitation[J]. Science & Technology Review, 2015 , 33(15) : 38 -42 . DOI: 10.3981/j.issn.1000-7857.2015.15.005

References

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