轮南奥陶系潜山碳酸盐岩储层基质孔隙度和渗透率很低，但溶蚀孔洞的发育改善了其储集条件。

Matrix porosity and permeability are low in the Ordovician carbonate reservoirs of Lunnan buried hill, but the reservoir conditions are improved by the growing of dissolved pores.

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长石溶蚀产生的次生孔隙对于该区天然气储集空间的贡献很大，经统计分析可知在流纹质熔结凝灰岩和流纹质凝灰岩中的长石溶孔分别占孔隙度的18.61％和13.71％。

For example, in Xujiaweizi area, pores as a result of feldspar corrosion in rhyolitic ignimbrite and rhyolitic tuff make up of 18.61% and 13.71% respectively of the all the porosity.

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本文提出了以标志性造岩矿物斜长石的显微孔隙变化为特征的风化度评价新指标——斜长石溶蚀度。

Using the changing of micro-void of a typical rock-forming mineral, the plagioclase solution degree is proposed as a new index to evaluate the weathering degree.

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