CAJ | 학술논문

近年来水平井在开发稠油资源中得到了广泛应用,但是对于注蒸汽热采水平井,水平段长度的优化和有效利用问题一直是理论研究和现场开发的难点和重点.在研究Homes等提出的多段井模型的基础上,建立了从井口到水平井趾端的全一体化模型;根据水平井注蒸汽流动动态研究结果,提出了水平井蒸汽吞吐极限水平井段长度的概念.研究表明:水平井注蒸汽是一个动态变化的过程,蒸汽干度和温度随水平段变长不断变小;随注入时间增加,相同的水平段处的干度和温度值变大;在相同的油层深度下,增大注汽速度可以提高水平井段有效加热长度,改善开发效果.
근년래수평정재개발주유자원중득도료엄범응용,단시대우주증기열채수평정,수평단장도적우화화유효이용문제일직시이론연구화현장개발적난점화중점.재연구Homes등제출적다단정모형적기출상,건립료종정구도수평정지단적전일체화모형;근거수평정주증기류동동태연구결과,제출료수평정증기탄토겁한수평정단장도적개념.연구표명:수평정주증기시일개동태변화적과정,증기간도화온도수수평단변장불단변소;수주입시간증가,상동적수평단처적간도화온도치변대;재상동적유층심도하,증대주기속도가이제고수평정단유효가열장도,개선개발효과.
Nowadays, horizontal wells are widely applied to the development of heavy oil resources. However the length of hori-zontal well is an important problem to research. In this paper, a fully simulation model is built on the basis of Homes' multisegment wells model. Through the simulation model, steam flow condition of the horizontal well is studied, the temperature and quality are lower along the horizontal well from heel to toe. The temperature and quality in the same place is increasing during steam injecting. Finally, the limited horizontal length of cyclic steam stimulation is optimized, the result indicates that the limited horizontal length becomes longer as the steam rate is increasing. The product effect of horizontal well can be improved by the increase of steam rate.