tuffaceous

The tuffaceous formation , isolated remnants, are about 200-250 ft thick.

凝灰岩构造的局部残存段的厚度约为 200-250 ?铡?

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The types of reservoirs main include base rock weathering crust, sandstone, tuffaceous sandstone and conglomerate.

储层类型主要包括基岩风化壳 、 岩 、 灰质砂岩和砾岩.

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They reported the abnormal uranium content of waters issuing from tuffaceous rocks.

他们发现,从凝灰岩中流出的水中铀含量反常.

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The other rocks, such as silicalite, jaspilite, spilite, tuffaceous sandstone, show high resistivity and low chargeability ( 1%~ 3%) in nature.

其余硅质岩、碧玉岩、细碧岩、凝灰质砂岩为高阻低极化，视极化率一般在1%~3%。

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Study of~ ( 237) NP adsorption on crushed tuff and tuffaceous sand

~（237）Np在破碎凝灰岩和凝灰质砂上的吸附研究

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For alkaline tuffaceous and ultra-alkaline tuffaceous reservoirs, it is should utilized the fracturing fluid to reduce filtration loss and enhance the preventing dilatability of fracturing fluid;

碱性和偏碱性凝灰质储层，应研究使用低滤失压裂液，降低滤失量，同时提高压裂液的防膨胀性能；

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Compared with low permeability glutenite, pore structure, relation of throat radius and permeability and separation of low permeability sandstone and low permeability tuffaceous sandstone is similar.

研究结果表明1.低渗透砂岩、低渗透凝灰质砂岩储层在孔隙结构类型、喉道与渗透率关系、分选性与渗透率关系等方面较为接近，而与低渗透砂砾岩相差较大。

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The tuffaceous blanketed the entire basin.

凝灰岩充填着整个盆地.

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oil shale always has the accompanying relationship with overlying sedimentary tuff or other tuffaceous strata.

油页岩常与上覆沉凝灰岩或其它凝灰质岩石呈伴生关系。

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The nature of mineralogy, petrology and geochemistry also provides reliable information to prove that primitive tuffaceous sedimentary rock underwent "soaking effect" in a kind of brine and formed scapolite biotite rock.

矿物学、岩石学及地球化学特征也为其原凝灰质沉积岩经过热卤水浸泡效应（soaking effect）形成方柱黑云岩类的成因提供了可靠信息。

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