The permeability of Jiangsu oil field widely distributed including high, medium, low and ultra-low permeability.
江苏油田高、中、低及特低渗透储层均有。
The oil reservoirs in Pingbei Area of Ansai Oilfield is difficult to develop because of its ultra-low permeability, micro-fracture, and low production of oil wells.
安塞油田坪北区油层渗透率特低，具有微裂缝，油井产量低等特点，为此，增加了油藏开发中的难度；
The fracturing technology of horizontal well and supplementary well patterns can greatly improve the development effectiveness in the ultra-low permeability reservoir.
再配合适当的注采井网，特低渗透油藏开发水平将有大幅度的提高。
The results show that: in the ultra-low permeability permeable reservoirs development process, injection pressure increases first and then decreases, at last stays stable;
研究结果表明：特低渗油藏在不同开发方式开发过程中，注入压力都表现为先上升后下降，最后趋于稳定值；
Some cases prove that this method is very simple, practical. It can provide basic for rational well spacing and is of great significance for developing ultra-low permeability reserve.
通过实例分析表明，该方法计算简单、实用，为油井的合理井距设计提供依据，对超低渗透油藏的开发具有重要意义。
Peripheral oilfields are also the main direction to increase recoverable reserves, but 90% reserves are located in ultra-low abundance, ultra-low permeability and complex fault-block reservoirs.
外围油田也是增加可采储量的主要方向，但90%的储量位于特低丰度、特低渗透及复杂断块油藏。
Ansai oil field in Ordos basin is a ultra low permeability reservoir with natural and induced fractures, which caused serious lateral heterogeneity of permeability in the reservoir.
鄂尔多斯盆地安塞特低渗透油田由于存在天然裂缝或人工压裂裂缝，造成了储集层平面渗透率的方向非均质性。
The major pay bed is low permeable ultra dense sandstone. Its permeability and pore throat texture are very sensitive to the net pressure of overlying strata.
主要产层为低渗透超致密砂岩，其渗透率和孔喉结构对上覆地层净压力很敏感。
Water - drive and nitrogen - drive experiments are performed to compare their displacement effects and study the displacing mechanism of ultra - low permeability reservoirs.
文中进行了水驱油和氮气驱油试验，以比较驱替效果，探究超低渗油藏的驱替机理。
An application experimental study of NMR logging in Tahe ultra-low porosity and low permeability reservoirs in Xinjiang is conducted.
在新疆塔河特低孔低渗油气藏进行了核磁共振测井应用实验研究。
The Daanzai reservoir belongs to the type of porosity-fractured reservoir of ultra low porosity and permeability.
川中大安寨储层属于特低孔隙度、低渗透率的孔隙-裂缝型储层，裂缝以低斜水平缝为主。
This paper primarily discusses the changeable features of the process through the modelling experiment of secondary migration using the reservoir sandstone with ultra-low porosity and permeability.
石油二次运移是一个复杂的地质过程，本文通过利用饱和地层水的低孔低渗储层砂岩来进行石油二次运移模拟实验，初步研究了此过程的变化特征。
Owing to the complex geological factors and changeable productivity, there are many factors effect on the prediction of productivity in ultra low permeability reservoir.
超低渗透储层由于其地质因素复杂，产能变化大，影响产能预测的因素众多，因而产能预测难度大。
The results indicate that throat type in an extra-ultra low permeability sandstone reservoir is versatile and minute.
研究结果表明，特低-超低渗透砂岩储层喉道类型多样；
Reservoir properties is middle-low, and permeability is low- ultra-low.
储层物性上具中低孔，低-特低渗特征；
Reservoir properties is middle-low, and permeability is low- ultra-low.
储层物性上具中低孔，低-特低渗特征；
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