
162
当代化工研究
wetlat
百家争鸣
2016-09
辫状河储集层渗流屏障对剩余油分布的影响
以黄骅坳陷王官屯油田为例*孙建
(中国石油大港油田第三采油厂河北061735)
摘要;针对黄路始陷王官电油围辨状河储集层,分析认为渗流屏障主要是弱表居,结合现代避状河况积转征,对单一期次的辨状河心准及隔夫层进行分析。利用生产动态资料如示踪剂、吸水削面等准确的刻函的单一河道及心滩展布,结合注水开发特征,建立了单砂体内部
刺余油分布模式,制余油主要富集在注水术波及的心难边媒,注来不对应的砂体之间。关键调:王官电:层;夫层:落淤层
中图分类号:T
文献标识码:A
Influenceof SeepageBarriers inBraided RiverReservoironRemainingOil Distribution
TakingHuanghua DepressionWangguantun Oilfield As the Example
SunJian
(No.3 Oil Recovery Plant, PetroChina Dagang Oilfield Company, Hebei, 061735)
Abstract: Directing at zhe braided river reservoir of Huangve depression Wanggtiantun Oifield, rhe analysis resadt indicates hat seepage barrier is mainly the compartmem and interlayer, besides, combined with modern braided river sedimentary chanacteristics, take analysis of the mid channel bar; compariment and inerlayer of single isse of braided river. Make use of rhe prodhicrion dynamic materials suich as tracer and water intake profile etc. to acctrately describe rhe single channel and mid-channel bar, besides, combined with rhe featones of water-fooding developmenz, set ap rhe distriburtion pafterns of remaining oil in single sand body, the remaining oil is mainly concemtrafed on zhe edge of the mid-channel bar without zhe influence of waterflooding and between the sand bodies which hanve non-corresponding injecrion-production.
Key words:Wangguantarn Oilfield; comparment; interlayer; sedimentation layer
1.研究区概况
王官屯油田主要是冲积扇扇中状水道形成的储层,目前开发了多个断块油藏,油藏经过多年开发,目前均进入了高含水开发阶段。(图1)但是实践证明高含水油藏在渗流屏障的影响下,依然存在着部分较多剩余油,因此加强渗流屏障的研究,对提高采收率具有重要意义。
层
.
起隆
县沧
沧
舍女等
乌马营
断
沧州
官电
西徐
孔店起乌黑
图1主官屯油用区拨位置图
2.沉积特征
(1)况积相类型万方数据
由于该区主要是冲积扇扇中辩状河道沉积,具体微相
主要有河道、心滩和河道间沉积。由于距离物源距离相对较近,沉积物粒度一般较粗,以细砂岩为主,含砾,分选磨圆差,砂所占的比例小,垂向剖面上一般缺乏粉砂质、泥质等细粒沉积物。
(2)况积相特征河道特征
筹状河道砂体通常由一期或多期河道砂岩高加而形成厚度一般小于心滩,辨状水道泥质含量要比心滩沉积低得多,在主河道区域电测曲线多为高、中幅钟型曲线或复合钟型曲线,而非主河道区域电测曲线多为单指形,幅度中等。自然电位曲线为钟型或平直(图2)。
官3-13-1井
深度性0—BA25—2分层 A辨状河道微相