To address the problems of unclear coupling mechanism and imperfect optimization of production parameters in the process of steam injection in heavy-oil thermal recovery wells with multiphase flow, the influence of wellbore inclination was considered based on the theory of gas-liquid flow, a gas-liquid heat-fluid coupling model for whole interval of heavy-oil thermal recovery wells was established in combination of the distribution characteristics of fluid film in the wellbore, and the influence of different parameters on the thermal properties of wet steam in the wellbore was analyzed. The study indicated that, when the wellbore inclination angle was less than 45 °, the thermodynamic properties of wet steam were significantly affected by wellbore inclination; when the wellbore inclination angle was greater than 45 °, the influence on the thermodynamic properties of wet steam was gradually decreases; the pressure, temperature and dryness of the steam varied with the increase in well depth, especially in the horizontal interval. The optimization of injected steam volume and other parameters for three thermal recovery wells in Liaohe Oilfield resulted in a 15.3%, 16.6% and 14.7% reduction in injected steam volume under the expected well production conditions, greatly reducing the development cost of thermal recovery horizontal wells. The study is of great significance to guide the optimization of wellhead steam injection parameters and improve the thermal efficiency of steam injection.
Xia Boyi
,
Gao Qingchun
,
Sun Liwei
,
Lu Yuzhou
,
Ping Shanhai
. Heat-Fluid Coupling Pattern in the Whole Interval of Heavy-oil Thermal Recovery Wells[J]. Special Oil & Gas Reservoirs, 2022
, 29(4)
: 142
-148
.
DOI: 10.3969/j.issn.1006-6535.2022.04.020
[1] 任芳祥.辽河油区老油田二次开发探索与实践[J].特种油气藏,2007,14(6):5-10.
REN Fangxiang.Exploration and practice of secondary development in old oilfields of Liaohe oil province[J].Special Oil & Gas Reservoirs,2007,14(6):5-10.
[2] 李红爽. 稠油热采水平井分段完井技术研究[J]. 中外能源, 2013, 18(10): 60-62.
LI Hongshuang.Research on segregated completion technology applied in the horizontal wells with thermal recovery in the heavy oil reservoirs[J].Sino-Global Energy,2013,18(10):60-62.
[3] 高永荣, 刘尚奇, 沈德煌, 等. 超稠油氮气、溶剂辅助蒸汽吞吐开采技术研究[J]. 石油勘探与开发, 2012, 30(2): 73-75.
GAO Yongrong,LIU Shangqi,SHEN Dehuang,et al.Study on N2 and solvent assisted steam stimulation in a super-heavy oil reservoir[J].Petroleum Exploration and Development,2012,30(2):73-75.
[4] 廉黎明, 秦积舜, 杨思玉, 等. 水平井渗流模型分析评价及发展方向[J]. 石油与天然气地质, 2013, 34(6): 821-826.
LIAN Liming,QIN Jishun,YANG Siyu,et al.Analysis and evaluation on horizontal well seepage models and their developing trends[J].Oil & Gas Geology,2013,34(6):821-826.
[5] FISCHER J.Terpolymer of ethylene,vinyl acetate and isobutylene useful as pour point depressants in distillate oils:US5256166A[P].1988-10-05.
[6] LESSARD R R,DEMARCO G,FIOCCO R J,et al.Recent advances in oil spill dispersant technology with emphasis on new capability to disperse heavy oil[C].SPE46745,1998:1-4.
[7] GREASER G R,ORTIZ J R.New thermal recovery technology and technology transfer for successful heavy oil development[C].SPE69731,2001:1-7.
[8] SVRCEK William,MEHROTRA Anil.Gas solubility,viscosity and density measurements for athabasca bitumen[J].Journal of Canadian Petroleum Technology,1982,21(4):31-38.
[9] WANG Xuezhong.The hot water oil expulsion technique for geothermal resources[J].Geomaterials,2012,2(2):42-48.
[10] 袁士义, 刘尚奇, 张义堂, 等. 热水添加氮气泡沫驱提高稠油采收率研究[J]. 石油学报, 2004, 25(1): 57-61.
YUAN Shiyi,LIU Shangqi,ZHANG Yitang,et al.Enhancing heavy oil recovery with hot water flooding by adding nitrogen and surfactant[J].Acta Petrolei Sinica,2004,25(1):57-61.
[11] 陈荣灿, 霍进, 郭新和. 稠油注蒸汽加氮气吞吐试验研究[J]. 特种油气藏, 1999, 6(3): 59-64.
CHEN Rongcan,HUO Jin,GUO Xinhe.Experimental study on steam injection complemented by nitrogen huff and puff for heavy oil recovery[J].Special Oil & Gas Reservoirs,1999,6(3):59-64.
[12] 王嘉淮, 李允. 注氮气改善稠油蒸汽吞吐后期开采效果[J]. 西南石油学院学报, 2002, 24(3): 46-49.
WANG Jiahuai,LI Yun.Improve steam soaking performance by injecting nitrogen[J].Journal of Southwest Petroleum Institute,2002,24(3):46-49.
[13] 陈晓源. 氮气辅助蒸汽吞吐工艺在面120区的应用研究[J].钻采工艺, 2004, 27(6): 53-59.
CHEN Xiaoyuan.Application of nitrogen—assisted steam stimulation technology in Mian 120 Block[J].Drilling & Production Technology,2004,27(6):53-59.
