tight sand

Influencing Factors for Threshold Pressure Gradient near the Wellbore on Tight Sand Stones Reservoirs

致密砂岩储层近井区启动压力梯度的存在原因探讨

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With the exploitation development of gas, petroleum and high-efficiency oil field, the newly-explored types of oil-gas field are more complex. Among these reserves, low penetrability, tight sand has larger proportion. The oil extract effect after perforation was not better.

随着石油、天然气开发技术的深入发展及高效油田的不断开发，新勘探油气层类型更加复杂，其中低渗透、致密砂岩油层在油气储量中占有较大比例，射孔引油的效果并不理想。

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To prospect for the energy resources in the Fuxin basin, the distribution and formation of energy resources including coal, coalbed methane, oil, tight gas sand and geothermal resources were studied.

阜新盆地煤、煤层气、石油、致密砂岩气、地热等多种能源矿产的分布和成藏受到盆地构造热演化的控制。

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The development and stability of tight sand or conglomerate interbed and the shale band are all gradually changing better from the northwest to southeast.

致密砂砾岩夹层和泥岩隔夹层的发育程度和稳定程度从西北向东南逐渐增强，辫状河道微相和水下河道微相夹层少，稳定程度和连通程度低；

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Characteristics of tight sand gas reservoir in Zhongyuan oil field and its exploration

东濮凹陷致密砂岩气藏特征的研究

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And the first time on the type of tight gas sand Jixi basin done to determine.

进而选择代表该类气藏的川西坳陷致密砂岩气藏与鸡西盆地的成藏条件进行类比。

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Water locking damage happens widely in tight sand gas reservoirs with low permeability, and is one of the main damage types for tight sand gas reservoirs with low permeability, which influences the results of oil/ gas reservoir exploration and exploitation severely.

水锁损害广泛存在于低渗透致密砂岩油气藏，是低渗透致密砂岩油气藏的主要损害类型之一，这严重地影响着油气藏的勘探开发效果。

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"first is the conventional accumulation, but late is reconstruction" is the reservoir forming pattern of "subsequent" tight sand gas, and the pattern is divided into three phases with different reservoir forming characters and conditions.

后成型致密气藏为早常规聚集-晚期改造的成藏模式并划分为3个阶段，不同的阶段具有不同的成藏特点和成藏特征。

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So, it is better to do operation under balance and reduce the chance to contact the operating fluid with water phase as much as possible for tight sand gas reservoirs with low permeability.

因此，对低渗透致密砂岩油气藏应尽可能采用负压作业，尽可能减少与水相作业流体接触的机会。

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The interesting formations have features of tight sand reservoir such as the thin thickness of layers, low porosity, low permeability, heterogeneity and great differences in the abundance of gas and so on.

该地区目的储层具有储层薄、低孔低渗、非均质性强、含气丰度差异极大等特征，地震储层预测研究难度很大。

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The reservoirs are tight sand, with an average porosity of 4. 74% and permeability of 0. 417 × 10-3 μ m2. Delta front underwater distributary channel and mouth bar are the favorable reservoir micro-facies.

储层为致密砂岩储层，平均孔隙度4.74%，渗透率0.417×10-3μm2；有利的储层微相是三角洲前缘水下分流河道、河口砂坝；

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The application of interwell in describing the tight sand gas reservoir in the west of Sichuan

多井约束地震地层反演技术在川西致密砂岩气藏描述中的应用

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The sand reservoir of the Shanxi Formation and lower Shihezi Formation of Upper Palaeozoic in the south of Ordos Basin belongs to tight reservoir. The calcite cementation is one of the key factors causing tight sand reservoir.

鄂尔多斯盆地南部上古生界山西组&下石盒子组砂岩储层岩性致密，方解石的后期胶结作用是导致储层致密化的重要因素之一。

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Fracturing techniques of tight sand reservoirs with abnormal high earth stress

异常高地应力致密砂岩储层压裂技术研究

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The gases from the second member of Kongdian formation migrate into the tight sand; form the compact sandstone gas pool. This kind of gas pool has the characteristic of deep basin gas.

孔二段生成的气运移到孔店组致密砂岩层中，形成致密砂岩气藏，研究认为孔店组致密砂岩气藏具有深盆气藏的特征。

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Natural gas exploration mode of shallow tight sand in the west part of Sichuan Basin

四川盆地西部浅层致密砂岩天然气勘探模式

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The comparison of two types of tight sand gas reservoir

两种类型致密砂岩气藏对比

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Porous-type sandstone reservoir is shorter and shorter and gas reservoir in tight sand is more and more important.

由于好的孔渗性砂岩油气田越来越少，致密砂岩气藏作为一种非常规气藏近年来逐渐成为勘探和开发的热点。

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In-house study on water locking damage of tight sand gas reservoirs with low permeability

低渗透致密砂岩气藏水锁损害室内研究

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Recognition method of tight sand gas bearing bed

致密砂岩气层的识别方法

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The existence of vast area of tight sand rock, low permeability of sand rock and plenteous gas supply are all favorable conditions for the formation of deep basin gas traps.

大面积致密砂岩的存在、砂岩的低渗透性以及充足的天然气供应都是形成深盆气藏的有利条件。

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Research on pore structure and character of tight sand gas reservoirs

低渗致密砂岩气藏岩石的孔隙结构与物性特征

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Analysis of effect to treat saturation sand without overlay layer with crushing tight sand pile

挤密砂桩处理无覆盖层饱和砂土效果分析

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According to the principle of surface and colloid chemistry, the pore structure and characteristics of tight sand gas reservoir are analyzed.

根据表面与胶体化学原理，分析了低渗致密砂岩气藏的孔隙结构特征、物性特征以及它们之间的关系。

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Reservoir microscopic characteristics, especially the microscopic pore structure directly influence the reservoir properties and seepage ability, and eventually determines production of the Deep Tight Sand Gas Reservoir.

其储层微观特征，特别是微观孔隙结构直接影响储层的储集性能和渗流能力，并最终决定着致密砂岩气藏产能的大小。

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The application of gas-bearing attribute curve reconstruction techniqe to gas reservoir prediction of tight sand

含气特征曲线重构技术在致密含气砂岩储层预测中的应用

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Study on pore structure of tight sand based on resistivity

基于岩石电阻率参数研究致密砂岩孔隙结构

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In the West Sichuan Depression with tight sand, the formation mechanism of traps and gas reservoir is quite complicated, resulted from the basin's complex evolution.

在川西坳陷这个致密砂岩领域，圈闭和气藏的形成机理相当复杂，其根本原因在于盆地有着相当复杂的形成与演化史。

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