2009年采用选择性射开动用较差部位的做法,将北西块一区作为“二三结合”开发模式推广区块投入开发。试验区在延缓水驱产量递减、提高可采储量、加快采油速度以及提高最终采收率等方面均具有一定的意义。本文首先简要介绍北西块一区概况,其次重点介绍了北西块一区萨Ⅲ1-7油层地质特征及剩余油分布规律,最后分析了萨Ⅲ1-7油层的开发效果。 In 2009, we adopted the method of selectively shooting and using the poorer parts and put into operation a zone of North West Block as a promotion model for the development of “two or three combinations”. The experimental area is of great significance in delaying the production decline of waterflooding, increasing the recoverable reserves, accelerating the oil recovery and increasing the ultimate recovery. This article first briefly introduces the general situation of the first block of North West Block, and then focuses on the geologic characteristics of Sa Ⅲ 1-7 reservoir and the distribution of remaining oil in Block Ⅰ, Block Ⅰ, Northwest Block. Finally, the effect of the development of Sa Ⅲ 1-7 reservoir is analyzed.