四川盆地東南部小河壩組優(yōu)質儲層的形成機制
[Abstract]:The controlling factors and formation mechanism of high quality reservoir formation of Lower Silurian Xiaoheba formation in southeastern Sichuan Basin are discussed. On the basis of field profile measurement, the reservoir formation mechanism of marine clastic rock in Xiaoheba formation is analyzed by means of porosity and permeability analysis, thin slice identification, cathodoluminescence and scanning electron microscope, combined with previous research results. It is considered that sedimentary microfacies control the prerequisites for reservoir formation, and a set of siltstone is mainly deposited in underwater shunt channel and far sand bar, which has the innate conditions for reservoir formation. The shunt bay mainly deposits a set of mudstone or silty mudstone, which can not form reservoir. The hydrocarbon generation center plays an important role in controlling the reservoir of Xiaoheba formation, and the content of asphalt in sandstone is negatively correlated with the distance of hydrocarbon generation center. The vertical superposition relationship of lithology is also an important factor affecting reservoir formation. It has the formation structure of sand and mud interlayer. Because sandstone is not easy to compaction and cement, it can form a relatively good reservoir. However, thick sandstone is difficult to form a good reservoir because of its serious compaction and cement formation.
【作者單位】: 中國石化勘探分公司;油氣藏地質及開發(fā)工程國家重點實驗室(成都理工大學);
【基金】:國家科技重大專項(2016ZX05002-004-004)
【分類號】:P618.13
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