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超低渗透油藏有时会出现同一个油藏区块油井产能平面分布很不均匀的现象,增加了开发技术政策制定与执行的难度。以鄂尔多斯盆地吴410长6油藏为例,结合开发实践,深入分析了产能平面分布不均的影响因素,研究认为:由于油藏各开发单元所位于的储层砂体不同,造成油井产油的物质基础不一样;储层物性分布不均直接影响到产能状况,储层层内非均质性,如渗透率非均质程度及韵律性和层内不连续薄夹层的分布等也对产能分布形成重要影响;储层构造有时也可决定超低渗透油藏的油水分布,构造低的部位油井含水较高;储层普遍发育的微裂缝在注水开发过程中易开启,造成油藏局部单井点水淹,层间裂缝可能造成注水向非目的层流逸。
In the case of ultra-low permeability reservoirs, the uneven distribution of oil well productivity in the same reservoir block may sometimes appear, which increases the difficulty in formulating and implementing development technology policies. Taking Chang 410 reservoir of Wu 410 in the Ordos Basin as an example, this paper analyzes in depth the influencing factors of uneven distribution of production capacity. It is concluded that due to the different reservoir sand bodies in each development unit of the reservoir, The physical basis is not the same; uneven reservoir physical properties directly affect the production capacity, reservoir heterogeneity, such as permeability heterogeneity and the rhythm of the distribution of discontinuous thin interlayer also on the production capacity Distribution of reservoirs has an important impact; reservoir structure may also sometimes determine the oil-water distribution in ultra-low permeability reservoirs, and the water content in wells with low tectonic settings is high; micro-fractures, which are generally developed in reservoirs, are easy to open during waterflooding and development, Well point flooding, cracks between layers may cause water to flow to non-target layer.