Analysis on main controlling factors of tight oil reservoirs in Chang-8 reservoir of Fu County, Ordos Basin

Liu Xiuchan; Chen Xipan

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Analysis on main controlling factors of tight oil reservoirs in Chang-8 reservoir of Fu County, Ordos Basin
Vol. 9, Issue 1, Pages: 1-7(2019)
Published：2019
DOI：
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DOI：

Liu Xiuchan, Chen Xipan. Analysis on main controlling factors of tight oil reservoirs in Chang-8 reservoir of Fu County, Ordos Basin[J]. Petroleum Reservoir Evaluation and Development, 2019, 9(1): 1-7. DOI：

摘要

基于大量岩心分析数据

从研究鄂尔多斯盆地富县地区延长组长8致密油性质、赋存空间入手

综合分析该区致密油成藏主控因素。富县长8段细砂岩含低密度、低黏度可流动致密油

且多聚集在微米级孔喉中。致密油成藏主要受控于广泛发育的长7、长9烃源岩

“源夹储、储内夹源”成藏模式

水下分流河道微相环境下形成的复合叠置沉积砂体优质储层三大因素。根据上述致密油藏控制因素

结合目前勘探实践

预测出富县地区长8致密油6个潜力区块

为下一步勘探提供依据。

Abstract

Based on the massive analytical data of core

we comprehensively researched on the main controlling factors of the tight oil reservoir according to the property and the storage space of the tight oil formation in Chang-8 reservoir of Fu County in Ordos Basin. Fine sandstone in Chang-8 reservoir contained the movable tight oil with low density and low viscosity

and mostly concentrated in micron-sized pore throats. The accumulation of tight oil was mainly controlled by three factors that were the source rocks of Chang-7 and Chang-9 reservoirs

the main accumulation mode of

the reservoir existed in the resource

and the resource existed in the reservoir

and the high quality reservoir with composite superimposed sedimentary sand body formed in the underwater distributary channel microfacies environment. Based on the cont

rolling factors above

and combined with the current exploration results

we predicted 6 potential blocks of Chang-8 tight oil reservoir in Fu County

and provided the basis for the further exploration.