摘要
S断块为一中低孔、中低渗稠油油藏。利用数值模拟方法系统优选了该断块稠油油藏直井与水平井组合吞吐转入蒸汽驱的操作参数。结果表明:直井射孔位置与水平井垂向距离15m、水平井射孔位置与油层底界垂向距离7.0m,直井吞吐8周期、水平井吞吐6周期,地层压力降至5MPa左右,注汽速度84m3/d,井底蒸汽干度>40%,采注比1.2,为吞吐转汽驱的最佳操作参数。上述操作参数能使S断块吞吐转汽驱有效运作,提高原油采收率,也为同类型油藏直井与水平井组合吞吐转汽驱的操作参数优选提供了可靠的理论依据,具有一定的借鉴意义。
The S block is a low-middle porosity and low-middle permeability reservoir. This paper studied the operation parameters for steam flooding with the combination of vertical and horizontal wells by numerical simulation. The result shows that the optimum operation parameters are as following: the vertical distance is 15 m between the vertical well and horizontal well, and the vertical distance is 7 m between the horizontal well and reservoir bottom; after eight cycles of vertical well and six cycles of horizontal well, formation pressure dropped down to 5 MPa; the best steam injection rate is 84 m3/d, downhole steam dryness is greater than 40%, and production-injection ratio is 1.2. These optimum operation parameters make the steam flooding effective in S block, enhance the oil recovery factor, also provide reliable theoretical basis of operation parameters for steam flooding with the combination of vertical and horizontal wells in other similar reservoirs, and have very good reference significance.
出处
《岩性油气藏》
CSCD
2013年第3期127-130,共4页
Lithologic Reservoirs
基金
中国石化"十条龙"重点科研攻关项目"超深层稠油降黏开采关键技术"(编号:210003)资助
关键词
稠油油藏
直井与水平井组合
蒸汽驱
操作参数优选
heavy oil reservoir
vertical and horizontal well combination
steam flooding
operation parameters optimi- zation
