成岩作用

This paper reviews the forming reasons of extremely low permeability of tight sandstone gas reservoir,including congenital aggradation and acquired diagenesis.

论述了致密砂岩气藏特低渗形成的原因：即先天的沉积因素和后天的成岩作用等。

For excluding poorly preserved shells, a shell alteration index is suggested to estimate the state of preservation of brachiopod shells through examination under cathodoluminescence and scanning electron microscopes. This study shows brachiopod taxa e.

基于壳体保存程度的详细分析，以阴极发光程度、壳体显微结构为参数建立了壳体成岩作用改造程度的量化模式，经化石壳体氧、碳同位素值的验证，这一模式基本可以用来对不同保存环境下的样品进行筛选。

Deep formation reservoir ; organic-inorganic interactions ; fluid chemistry ; circulated convection current ; diagenesis

深部储层；有机-无机化学反应；水介质性质；循环热对流；成岩作用

The formation and evolution of this kind of reservoirs are mainly controlled by the effect of the sedimentation and diagenesis.

这些储层的形成与演化主要受到沉积和成岩作用的共同影响。

The factors influencing the magnetic properties of the sediments, and the role of particle size and early diagenesis.

沉积物磁性特征变化的因素是什么？粒度和早期成岩作用的影响是如何体现的？

Early diagenesis, an important study subject, has been given extensive attention.

早期成岩作用作为一个重要的研究领域受到广泛关注。

Through the deposition phase, diagenesis, the study of tectonic movement of the reservoir control factors.

通过对沉积相，成岩作用，构造运动的研究来分析储层的主控因素。

The sand body of channel in the middle sublacustrine fan has good porosity and is favorable reservoir.

利用东濮凹陷桥口地区的地质、测井和化验分析资料，从沉积微相、成岩作用、岩石结构等多方面入手，对其储层物性特征和控制因素进行了研究，指出桥口深层气藏湖底扇中扇辫状水道砂体物性较好，为有利储集层；该储层孔隙类型以次生溶蚀粒间孔隙为主，岩石粒度较细、分选中—差、以点—线接触为主；片状或弯片状喉道所占份额较大，造成储层低孔低渗；受溶蚀和交代作用的影响，部分层位次生孔隙发育，深层中也存在物性较好的储层。

The research result about abnormal pressure shows insufficiency of compaction disequilibrium as the sole cause of high pore fluid pressures, and tectonic compression, aquathermal expansion, diagenesis, hydrocarbon generation etc also can be the generating mechanisms.

一般认为欠压实是最主要的异常高压成因机制。由于构造挤压引起压应力的改变，由于水热膨胀、成岩作用、烃类生成等引起体积的膨胀，或由于流体流动和浮力作用也可产生异常超压。

Tectonic action is the main force causing fractures in the area; diagenesis influences, in a way, the generation and developmental degrees of fractures.

构造作用是本区裂缝形成的主要动力，成岩作用对裂缝的生成及发育程度有一定的影响。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。