涠10-3油田7井区注水采油动态及采收率分析  

ANALYSIS OF FLOODING PRODUCTION PERFORMANCE AND RECOVERRY OF WEI 10/3-7 BLOCK.

作　　者：吴佳贵 

机构地区：[1]南海西部石油公司

出　　处：《中国海上油气（地质）》1991年第3期35-40,共6页China Offshore Oil and Gas(Geology)

摘　　要：涠10－3－7井区L3^Ⅲ是主要产层组，产量占84％，已注水，次要产层L3^Ⅱ未注水。利用甲基水驱曲线预测水驱最终采收率20．2％。初步分析认为水驱储量少，储量动用程度低。主要由于L3^Ⅲ油层组注入水沿高渗透层和底部突进，油层水洗厚度薄，不出油厚度大；油水井布置不合理，注采系统不完善，水驱油面积小。另外，L3^Ⅱ油组没有注水等原因，造成采收率偏低。提高采收率应采取如下措施：强化采液、增加水驱储量（其中包括增加垂向波及厚度和完善注采系统扩大水驱油面积）、堵水和打斜井、改善中－低渗透性层，提高产油能力、对L3^Ⅱ油组进行注水。In Wei 10/3-7 block of Wei 10/3 oil field, formation Liushagang L3-3 is the main oil payzone which has produced 84% of the cumulative oil production from the block with water injection. L3-2 is the subordinate payzone which is not water flooded. From Type A water drive curve, ultimate oil recovery of 20. 0% by water drive can be predicted. The primary analysis concludes that the amount of water drive effective oil in place and its ratio to the OOIP are low. The reasons are: finger-advances along high permeable and bottom layers of injected water in L3-3 which has resulted in thinner swept and thicher unswept zones; unreasonable distribution of producers and injectors, which has caused the inefficiency of production and injection system and smaller swept area in the block. In addition, there is no water injection to L3- 2 formation,et al. These resulted in low recovery factor. The following methods should be used to obtain higher recovery factor: enhanced liquid production, increase of water drive dffective OOIP (including increase of vertical swept thickness in oil zone and improvement of production and injection system to enlarge swept area) ; water blocking in breakthrough zones; drilling of deviated wells; stimulation of medium-low permeable layers to increase oil productivity;water injection to L3-2.

关 键 词：涠10-3油田7井区 采油动态 采收率 水驱曲线 水驱储量 强化采液 堵水 L3^Ⅱ层注水 调整 井网布置 

分 类 号：TE357.8[石油与天然气工程—油气田开发工程] TE327