sandstones

Well-sorted quartz sandstones are generally not very abundant.

分选良好的石英沙岩一般并不十分丰富.

Alternating sandstones and shales are regarded as important.

蚀变的砂岩和页岩是很重要的.

The average reflectance of vitrinite of outcrop sandstones is not large difference from core sandstones '.

露头砂岩与岩芯砂岩的镜质体反射率无较大差别.

A research on the micromechanism of Acidizing Reaction on sandstones

砂岩酸化反应的微观机理研究

But current research work is mainly based on the sandstones' microscopic anisotropism and the macroscopic anisotropism.

而当前对砂体的研究工作主要集中在对砂体的微观非均质性和宏观非均质性的研究上。

These sandstones are interpreted as having originally been point bar deposits.

这些砂岩在成因上被解释为点沙坝沉积.

The beddings of sandstones developed in varied ways, among which cross bedding, horizontal bedding, parallel bedding, bed scour and fossils of plant stems and leaves took the majority.

砂岩层理发育丰富，主要有交错层理、水平层理、平行层理、冲刷面和植物茎叶化石等。

Sands lithify into sandstones.

砂经过石化而成砂岩.

AVO characteristics were ambiguous in thin-layer interbed sandstones and mudstones of terrestrial facies of Daqing area.

大庆地区陆相砂泥岩薄互层AVO特性不明显，甚至没有显示。

The data show that maximum oil saturation of sandstones is directly proportional to their porosity.

对这些数据的统计分析表明,不同润湿性砂岩孔隙度与最大含油饱和度大致存在线性定量关系.

The reservoir is mainly composed of lithic arkoses, some lithic feldspathic sandstones, and feldspathic litharenite sandstones.

本区储层岩性以岩屑长石砂岩为主, 部分为岩屑质长石砂岩和长石质岩屑砂岩.

Petrography features suggest that the sandstones, which have low compositional and textural maturity, were derived from recycled orogen or collisional orogen.

岩相学特征表明盆地砂岩成分成熟度和结构成熟度均较低，物源为再旋回造山带或碰撞造山带。

Experimental Study on Wave Impedance and Lame Constant of Reservoir Sandstones

储层砂岩波阻抗及拉梅常数实验研究

Such sandstones should have similar angular relations to the strike valleys.

这种砂岩体与走向谷之间与有类似的交角关系.

Normally tan to reddish sandstones are bleached.

黄褐色至浅红色的砂岩通常是褪色的.

The fossils at Dinosaur Cove are embedded in hard sandstones.

恐龙峡谷中的化石都嵌在坚硬的砂岩中。

Rocks therein, namely, quartzose sandstones and limestones, exhibit clear brittle behavior.

该处岩石，如石英砂岩和石灰岩在变形过程中显示了清晰的脆性特征。

Under the different confining pressure, a suit of elastic velocities reservoir sandstones with widely varying petro-physical properties was measured using ultrasonic pulse transmission technique.

在不同围限压力下，利用超声波脉冲透射法对一套物性参数变化较大的储层砂岩弹性波速度进行了实验测量。

Any of various dark gray sandstones that contain shale.

杂砂岩任何含有页岩的多种黑灰色砂岩之一.

The unanimous REE diagrams of the sandstones suggest that they were formed from the same source rocks and tectonic setting.

砂岩非常一致的REE模型，基本显示了同一的物源和相同的构造背景。

Sandstones are, as a rule , interbedded with shales.

砂岩通常都与页岩互层.

Carbonate rocks and sandstones are important gas oil reservoirs. The secondary pore space caused by the deep karstification during buried period is the effective space of gas oil migration and accumulation.

碳酸盐岩和砂岩是重要的油气储层，埋藏期深岩溶作用形成的次生孔隙是油气运移和聚集的有效空间。

It intruded Eocene sandstones.

它侵入始新世砂岩.

The results show that, T2 cutoff method is appropriate in many cases, which is in wide use currently, but it is inappropriate in core-grained sandstones and carbonates at high water saturation;

研究结果表明：T2截止值方法（CBVI）是目前广泛使用的确定束缚水体积方法，这种方法在很多情况下是适用的，但不适合于高含水饱和度的粗粒砂岩以及碳酸盐岩储层；

The asphalt reflectance ( BRo) shows that formation of the asphalt was hardly affected by thermal action. Practically, the Silurian asphaltic sandstones were formed mainly by intense bio degradation and the BRo value reflects the bio degradation grade of the asphalt.

沥青反射率BRo反映了沥青的形成受热作用影响不大，BRo大小实际上反映生物降解程度的强弱，志留系沥青砂岩主要是由较强烈的生物降解作用而造成的。

The porous media used are man-made sandstones and the penetrating liquids are oil and water.

实验采用的多孔介质为人造石英砂岩,渗流液体为油和水.

The "ABAB"," BBB" sequences middle-fine grained sandstones in longitudinal gravity flows, slide gravity flows and storm gravity flows are favorable for oil and gas accumulation.

盐湖等深流沉积。风暴重力流、纵向重力流和滑塌重力流中的“ABAB”序和“BBB”序中&细砂岩是油气聚集的有利场所。

For gas bearing sandstones , Lame constant will reduce and shear modulus increase.

获得了莺歌海盆地砂岩纵、横波速度关系.

This paper makes an experimental study in respect to the high water content in loose sandstones and the characteristics of ST glue, a macromolecular compound.

针对疏松砂岩高含水的现状，并根据高分子化合物ST胶的特性作室内实验研究。

The coarsest sandstones intercalated with grey mudstones.

最粗粒砂岩与灰色泥岩成互层.