天然裂缝对水平井开发效果影响

Discussion on the Effect of Natural Fractures on Horizontal Well Development

很多储层中都存在有丰富的天然裂缝,有时,它们甚至是油气储集的重要场所。鄂尔多斯盆地特低渗透储层本身非常致密,发达的天然裂缝提高了储层渗透性,也是储层中油气运移和流体渗流的重要通道。在油田开发过程中,这些天然裂缝的存在也对开发效果产生着重要的影响。本文以陕北吴起油田白豹、白河两个油区长8致密砂岩储层为例,应用前人研究成果,结合微地震监测数据,对天然裂缝方位对水平井产量的影响进行了分析,并对其开发意义进行了探讨。

Many reservoirs are rich in natural fractures, and sometimes they are even important sites for oil and gas accumulation. The ultra-low permeability reservoirs in Ordos basin are very dense, and developed natural fractures improve the permeability of the reservoirs, they are also important channels for oil and gas migration and fluid percolation in the reservoirs. In the process of oilfield development, these natural fractures has an important impact on the development effect. In this paper, taking C8 tight sand reservoir in Wuqi Oilfield in Northern Shaanxi as an example, the influence of natural fracture orientation on horizontal well production was analyzed by previous research results and combining microseismic monitoring data, and its development significance was discussed.