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(一)中区西部葡 I_(1-4)砂岩组高产稳产的过程中区西部全区采油速度,自一九七零年以来,一直保持在2%附近,实现了高产稳产。但是,葡 I_(1-4)油层的产量开始是逐步上升,到一九七二年底达到日产719.1吨的最高峰,以后产量逐年有所下降,到一九七六年底,日产油量已经降到534吨。和一九七二年相比,日产油量下降了25.8%。自一九七二年以来,平均每年下降约6.5%。可见葡I_(1-4)油层的高产稳产和全区的高产稳产是不完全相同的。分析中区西部高产稳产的过程,大体上可以分为两个阶段。在这两个阶段中,葡 I_(1-4)油层在高产稳产中的作用和我们采取的作法都是不同的。在高产稳产第一阶段,由
(1) The oil recovery rate in the western part of the western part of the I_ (1-4) sandstone group in the western part of Central China has kept at around 2% since 1970, achieving high and stable yield. However, the output of the Portuguese I_ (1-4) oil production started to gradually increase and reached the peak of 719.1 tons per day by the end of 1972. After that, the output decreased gradually year by year. By the end of 1976, the daily output of oil dropped To 534 tons. Compared with 1972, Nissan’s oil output dropped 25.8%. Since 1972, the average annual drop has been about 6.5%. Visible Portugal I_ (1-4) high-yield stable oil production and the region’s high and stable yield is not exactly the same. Analysis of the process of high and stable yield in the western part of the Central Region can be roughly divided into two stages. In both stages, the role of the Portuguese I_ (1-4) reservoir in producing high and stable yields is different from what we have taken. In the first stage of high and stable yield, from