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近年来,油田开发注水工作在各大油田收获颇广,投入产出关系转换成大效益,并且日趋见好。下寺湾油田从2001年开始注水,在成熟的工艺手段下见效,府村区域从2013年开始新建产能到目前开采面积97.4km2,形成年产油量5×104t的产能。由于注水滞后,水驱控制面积44.8km2,控制程度低,水驱动用更低。早年认识油田的构造,下寺湾油田府村构造位于陕北斜坡的南部(见图1),构造局部发育鼻状隆起,轴部一般为北西—南东向展布,隆起幅度一般5~10m。砂泥岩沉积互层受成岩期压实作用影响,纵向上各层构造具继承性发育的特点,但横向上各层构造高点略有偏移。这些局部构造为油藏提供了有利的构造配置,对油气分布具有一定的控制作用,同时对该油藏注水开发起到一定积极促进作用。
In recent years, the waterflooding work in oilfield development has gained a great harvest in all major oilfields, transforming the input-output relationship into a big benefit and getting better and better. Xiashiwan Oilfield started to inject water in 2001 and is effective under mature technology. The Fucun area started to build new production capacity from 2013 to the present with an area of 97.4km2, resulting in an annual production capacity of 5 × 104t. Due to water injection lag, waterflood control area of 44.8km2, low control, water-driven with a lower. Early years to understand the structure of the oil field, the XiaShanWan oil field village structure is located in the northern slope of northern Shaanxi (see Figure 1), the local development of nose-shaped uplift, the shaft is generally Northwest - South East distribution, the general elevation of 5 ~ 10m . Sandstone and mudstone interbedded layers are affected by the compaction of diagenetic stage. The structural features of all layers in the vertical direction are inherited and developed, but the structural highs of lateral layers are slightly offset. These local structures provide a favorable tectonic configuration for reservoirs and have a certain control over the distribution of oil and gas while playing a positive role in promoting waterflood development of the reservoir.