The oil exchange rate of CO2 huff and puff decreases with the increase of CO2 huff and puff cycle.In order to improve the rate,the numerical simulation method is used to optimize the injection-production parameters of CO2 huff and puff with variable injection time,and the economic evaluation is carried out.The results show that the cumulative oil production of the cyclic gas injection scheme is 32 983.4 m3,and the oil change rate reach to 1.11,which is higher than the optimal scheme of orthogonal experiment.The economic evaluation results show that the CO2 huff and puff scheme with variable cycle gas injection has the best economic benefits,with a net present value of 345.07×104 yuan and an internal rate of return of 18.06%.The research results can provide theoretical guidance for the efficient development of CO2 huff and puff in tight reservoirs.
Niu Zijing
,
Zhao Zhongjun
,
Zhang Yuan
,
Hu Jinghong
. Optimization of injection-production parameters of CO2 huff and puff in tight reservoirs considering variable cycle gas injection and economic benefits[J]. Special Oil & Gas Reservoirs, 2024
, 31(6)
: 114
-119
.
DOI: 10.3969/j.issn.1006-6535.2024.06.014
[1] 朱筱敏,潘荣,朱世发,等.致密储层研究进展和热点问题分析[J].地学前缘,2018,25(2):141-146.
ZHU Xiaomin,PAN Rong,ZHU Shifa,et al.Research progress and core issues in tight reservoir exploration[J].Earth Science Frontiers,2018,25(2):141-146.
[2] 张怿赫,盛家平,李情霞,等.CO2吞吐技术应用进展[J].特种油气藏,2021,28(6):1-10.
ZHANG Yihe,SHENG Jiaping,LI Qingxia,et al.Advances in the application of CO2 stimulation technology[J].Special Oil & Gas Reservoirs,2021,28(6):1-10.
[3] SONG C,YANG D.Performance evaluation of CO2 huff-n-puff processes in tight oil formations[C].SPE167217, 2013: 1-19.
[4] LIU J R,LI H Y,TAN Q Z,et al.Quantitative study of CO2 huff-n-puff enhanced oil recovery in tight formation using online NMR technology[J].Journal of Petroleum Scienceand Engineering,2022,216:110688.
[5] ZHU C,GUO W,WANG Y,et al.Experimental study of enhanced oil recovery by CO2 huff-n-puff in shales and tight sandstones with fractures[J].Petroleum Science,2021,18(3): 852-869.
[6] WANG Y,HU J,XIE W,et al.Optimization and analysis of CO2 huff-n-puff process in shale oil reservoirs using response surface methodology (RSM)[J].Geofluids,2022,2022:5927853.
[7] 唐维宇,黄子怡,陈超,等.吉木萨尔页岩油CO2吞吐方案优化及试验效果评价[J].特种油气藏,2022,29(3):131-137.
TANG Weiyu,HUANG Ziyi,CHEN Chao,et al.Optimization of CO2 huff and puff scheme for Jimsar shale oil and evaluation of test effect[J].Special Oil & Gas Reservoirs,2022,29(3):131-137.
[8] YU W,LASHGARI H,SEPEHRNOORI K.Simulation study of CO2 huff-n-puff process in Bakken tight oil reservoirs[C].SPE169575,2014:1-16.
[9] 刘应红,李宗田,赵碧华.利用正交实验设计方法优选低渗油藏整体压裂方案[J].断块油气田,2000,7(3):46-49,71.
LIU Yinghong,LI Zongtian,ZHAO Bihua.Optimization of fracturing project for low permeable reservoir with orthogonal and analysis of experiments[J].Fault-Block Oil & Gas Field,2000,7(3):46-49,71.
[10] 李楠,潘志坚,苏婷,等.超低渗油藏CO2驱正交实验设计与数值模拟优化[J].新疆石油地质,2017,38(1):62-65.
LI Nan,PAN Zhijian,SU Ting,et al.Orthogonal test design and numerical simulation optimization of CO2 flooding in extra-low permeability reservoirs[J].Xinjiang Petroleum Geology,2017,38(1):62-65.
[11] 王筱萌.致密油藏CO2吞吐优化设计与技术政策界限研究[D].中国地质大学(北京),2016.
WANG Xiaomeng.Study on optimization design and technical policy limit of CO2 huff and puff in tight reservoir[D].Beijing:China University of Geosciences (Beijing),2016.
