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河南油区稠油油藏水平井开发技术
引用本文:杨晓培.河南油区稠油油藏水平井开发技术[J].油气地质与采收率,2012,19(2):72-74.
作者姓名:杨晓培
作者单位:中国石化股份河南油田分公司勘探开发研究院,河南南阳,473132
基金项目:中国石化科技攻关项目“新庄复杂小断块稠油油藏开采关键技术研究”(P04050)
摘    要:河南油区稠油油藏通过直井蒸汽吞吐取得了较好的开发效果,但部分储量丰度较差的浅薄层稠油油藏及叠瓦状分布的条带状边水稠油油藏,采用常规直井开发,单井可采储量低,很难取得经济效益。为合理开发河南油区稠油油藏未动用储量,利用数值模拟技术,结合其地质特点,开展水平井开发技术研究,优化了水平井及注采工艺参数。结果表明:水平井目的层段垂深应大于150m;最佳水平段长度为80~150m;水平井与油水边界的距离大于60m后,基本未见边水入侵;水平井与断层距离大于20m时,断层不会开启;井底注蒸汽干度大于50%,开发效果明显改善;第1周期注汽量为2000t,油汽比和周期产油量均较高,分别为0.54t/t和1000t,吞吐效果较好;当注汽速度为300t/d时,优选注汽压力为14MPa、排液速度为20t/d左右比较合理。

关 键 词:稠油油藏  浅薄层  边水  水平井  注采参数  河南油区

Development techiniques of horiontal wells on heavy oil reservoir,Henan oilfield
Yang Xiaopei.Development techiniques of horiontal wells on heavy oil reservoir,Henan oilfield[J].Petroleum Geology and Recovery Efficiency,2012,19(2):72-74.
Authors:Yang Xiaopei
Affiliation:Yang Xiaopei,Research Institute of Exploration and Development,Henan Oilfield Company,SINOPEC,Nanyang City,Henan Province,473132,China
Abstract:The development of steam stimulation in vertical wells has acquired preferable effects in the host area of Henan heavy oil reserves.But the technique of conventional vertical well,in thin layer of the heavy oil reserves with poor reserves abundance and banded edge water heavy oil distribution,has low single well recoverable reserves,and it is difficult to obtain economic benefits.In order to develop the reserves mentioned above,we consider the geologic characters of Henan heavy oil reserves and use numerical stimulation to carry out the research in horizontal well,and then optimize the deployment and production parameters of horizontal well in Henan heavy oil reserves.The results show that;the vertical depth of horizontal intended interval should be greater than 150 m;the best horizontal length is 80-150 m,and the oil production and oil-gas ratio have no increment;when the horizontal well away from oil-water boundary farther than 60 m,edge water invasion rarely occurs;when the horizontal well is greater than 20 m away from the fault,the fault will not open ;when the dryness fraction of steam at bottom of the well is greater than 50%,the development effect has been significantly improved;when the first circle steam injection is 20 t/m,oil-water ratio and cyclical oil production have a high value,0.54 t/t and 1 000 t,the effect of huff and puff is better;when steam inject speed is 300 t/d,the optimized injection pressure is about 14 MPa,and the rate of delivery at about 20 t/d is reasonable.
Keywords:heavy oil reservoir  thin and shallow beds  edge water  horizontal well  injection-production parameter  Henan oilfield
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