地层的

As for the air percussive rotary drilling, because of its advantages of high ROP, long bit life, light WOB, reduced wear of drill collar, large cuttings, low drilling cost, low formation damage and no lost circulation, it has gained acceptance.

空气冲击回转钻井在一些特定的地层和井眼条件下具有高机械钻速、长钻头寿命、小钻压、较轻钻具磨损、大岩屑、低钻井成本、较轻油层污染和避免井漏等优点，因此很早就被钻井界接受。

New type PDC cutters and heavyset gage design promote longer bit life in hard and abrasive formations.

新型切削齿及高密度保径布齿提高钻头在硬研磨性地层中的使用寿命。

The soil and water loss which corrades easily becomes faster because of high air temperature, precipitation rain fall, violet red and brick red sandstone, undeveloped formation structure, bad fertility and little vegetation, and frequent and irrational human activity, etc.

原因是研究区月平均气温高，雨量充沛，岩石岩性以紫红、砖红色砂砾岩为主，地层构造不发育，土壤肥力差，植被生长困难，再加上人类活动频繁，以及不合理利用土地资源，使本来就易受侵性的土壤流失更迅速。

A strata correlation method by integrating autocyclicity sediment correlation, key surface correlation, corrading stream correlation, reservoir fluid correlation and microfacies sequence correlation was presented and successfully applied in Palogue Oilfield of Sultan.

并根据地层特点，对各类方法进行选择，提出了在高分辨率框架内，采取沉积自旋回对比、关键界面约束对比、河流切割和充填对比、储层流体性质对比和沉积微相相序对比等多种对比相结合的方法。

The restoration of denuded cover is of great importance to the study on the tectonic development, evolution and the petroleum-controlling geological conditions.

恢复地层剥蚀厚度是定量研究构造演化史和油气地质定量分析的重要基础工作。

Based on these results the mathematic model and spectrum equilibrating filter frame were designed.

建立视等厚层状吸收介质模型，计算地层吸收衰减特性，以此为依据给出了频谱均衡滤波器的数学模型和设计框图。

Study of effect of hydraulic perforating on formation fracturing pressure［J］.

射孔对地层破裂压力的影响研究［J］。

There are three stages of making the digital section histogram, including the process of neatening the original section data, prophase preparing of making the section histogram, making the section histogram.

实测剖面是区域地质调查工作的重要组成部分，RGMAP数字剖面系统使实测地层剖面全面实现了计算机化。

This dissertation redefined "the mung bean rock" by synthesizing the correlation sections, according to the new congnition that the middle formation of Lei〓 in the middle region of Sichuan is the same as that of Jia〓 in eastern Sichuan Basin, the section of the Leikoupo Formation was redivided into Lei〓, Lei〓, Lei〓 and Lei〓 sections. The important one Lei〓 was redivided into Lei〓1, Lei〓2, Lei〓3 and Lei〓 subsections.

本论文在川中地区雷-1中亚段与川东地区原嘉五1亚段同层的新认识基础上，通过重新确定绿豆岩标准层，用综合对比方法，将川东地区雷口坡组地层重新统一细分为雷一、雷二、雷三和雷四段，对重点层段雷一段再细分成雷一1.1、雷一1.2、雷一1.3和雷一2亚段。

It is an important way reinjecting the water into formation to refrain from environment pollution and to utilize it.

把油气井产出水回注地层是避免环境污染，利用这一水资源的重要途径。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失