南五区二类油层聚合物驱开发方案优化设计研究
发布时间:2018-09-11 07:57
【摘要】:大庆萨尔图油田南五区位于大庆长垣萨尔图油田南部,区块开发面积为12.0km2,地质储量6671.69×104t。本区块属于三角洲内、外前缘相沉积,共分为8个油层组,30个砂岩组,98个小层,144个沉积单元。南五区二类油层主要集中在萨Ⅱ7-12与葡Ⅰ5+61-7砂岩段。区块于1965年开始投入开发,目前共有注入采出井779口,其中采出井457口,注入井322口。在综合考虑提高聚合物驱开发效果与经济效益的基础上,本文针对南五区二类油层发育特点,结合区块开发历程,对南五区二类油层聚合物驱方案进行了优化设计。本文首先设计优选了二类油层层系组合方案,确定了二类油层聚驱层系组合为萨Ⅱ7-12油层,目的层地质储量739.22×10~4t,其中有效厚度≥0.5m油层钻遇砂岩厚度7.8m,有效厚度5.4m,地质储量600.35×10~4t。结合数值模拟及经济评价结果优选了二类油开发布井方案,优选了一套井距为125m的五点法面积井网的布井方式,共设计新钻井621口,其中采出井335口,注入井286口。根据萨尔图油田南部开发区聚合物分子量与有效渗透率的匹配关系图版、注入压力与注入速度关系公式等,优化设计了二类油层聚合物分子量、聚合物溶液浓度、聚合物用量及注入速度,并对聚合物驱油优化方案进行了产能及开发效果预测,预计聚合物驱提高采收率10.44%。阶段累积产油量95.40×104t,增加可采储量62.68×10~4t。最后,对区块开发监测及方案实施要求进行了设计。
[Abstract]:The south fifth area of Daqing Saertu Oilfield is located in the south of Daqing Changyuan Saltu Oilfield with a development area of 12.0km2 and geological reserves of 6671.69 脳 104t. The block belongs to delta and outer front facies, and is divided into 8 reservoirs, 30 sandstone formations, 98 sublayers and 144 sedimentary units. The second class reservoir of South Fifth area is mainly located in the sandstone member of sa 鈪,
本文编号:2236084
[Abstract]:The south fifth area of Daqing Saertu Oilfield is located in the south of Daqing Changyuan Saltu Oilfield with a development area of 12.0km2 and geological reserves of 6671.69 脳 104t. The block belongs to delta and outer front facies, and is divided into 8 reservoirs, 30 sandstone formations, 98 sublayers and 144 sedimentary units. The second class reservoir of South Fifth area is mainly located in the sandstone member of sa 鈪,
本文编号:2236084
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