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低渗透岩石     
相关语句
  low permeability rock
     Experimental study on coupled flow through low permeability rock under confining pressure
     低渗透岩石在围压作用下的耦合渗流实验
短句来源
     EXPERIMENTAL STUDY ON COEFFICIENT OF SENSITIVENESS BETWEEN PERCOLATION RATE AND EFFECTIVE PRESSURE FOR LOW PERMEABILITY ROCK
     低渗透岩石渗透率对有效应力敏感系数的试验研究
短句来源
     Calculation of Relative Permeability of Low Permeability Rock with Multiple Factors.
     考虑多因素的低渗透岩石相对渗透率
短句来源
     The results indicated coupling between the seepage and the permeability in low permeability rock.
     实验结果表明:低渗透岩石渗流过程中存在明显的流固耦合效应。
短句来源
     There exists distinct fluid-solid coupling effect during seepage in low permeability rock. Experiments upon sandstone from Changqing oil field are performed with FDES–641 triaxial system to investigate the laws between the permeability of rock and the effective pressure. It is proved by experiments that the permeability of rock will drop regularly along with the increasing of the effective pressure.
     低渗透岩石渗流过程中存在明显的流固耦合效应,采用FDES–641驱替评价系统对采自长庆油田的砂岩岩样进行试验和分析以研究低渗透岩石渗透率与有效应力之间的关系。
短句来源
更多       
  low-permeability rocks
     Stress sensitivity characteristics of low-permeability rocks
     低渗透岩石压敏特征研究
短句来源
     On the basis of analyzing the CMS300 automatic stress sensitivity testing procedure and considering the time effect, systematic investigation on stress sensitivity characteristics of low-permeability rocks from Bonan Oilfield was carried out by testing random & controlled stress sensitivity. The characteristic curves of stress sensitivity were obtained, and the relationship between the curves and properties of rocks was discussed.
     在分析传统的CMS300全自动覆压压力敏感实验研究特点的基础上,充分考虑岩石受压缩的时间效应,对胜利渤南油田不同类型的低渗透岩石进行了系统的CMS300随机覆压和控时覆压的敏感性测试,获得了多种低渗透岩石压敏特征曲线,并探讨了岩石压敏特征与岩石本身属性的关系。
短句来源
     Through analyzing the experimental data and matching work,a relation curve was acquired from the experiment by which we can get the undetermined coefficient of the theoretical relation and finally obtain the quantitative relation between permeability and confined pressure in the micro-fracture and low-permeability rocks.
     通过对实验数据的分析整理,拟合得出实验关系曲线,从而确定了理论关系式中的待定系数,进而得到了发育微裂缝低渗透岩石渗透率随围压变化定量关系式。
短句来源
  rock of low permeability
     STUDY ON NONLINEAR SEEPAGE OF ROCK OF LOW PERMEABILITY
     低渗透岩石非线性渗流规律研究
短句来源
  low-permeability rock
     Non-Darcy percolation mechanism for seepage in low-permeability rock
     低渗透岩石非饱和非Darcy渗流机理
短句来源
     EXPERIMENTAL STUDY ON PERMEABILITY VARIATION WITH CONFINING PRESSURE IN MICRO-FRACTURE AND LOW-PERMEABILITY ROCK
     微裂缝低渗透岩石渗透率随围压变化实验研究
短句来源

 

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  low permeability rock
Emplacement of low permeability rock into high permeability aquifer rock and the presence of low permeability shear zones reduce aquifer thickness from thousands to tens of meters.
      
In the future, geothermal technologies may be developed to mine heat from hot low permeability rock.
      
  low-permeability rocks
It focuses on low-permeability rocks where advection in the matrix is negligible compared with that in fractures.
      
It focuses on low-permeability rocks where advection in the matrix is negligible as compared to that in fractures.
      
In Part 1, we have demonstrated the inevitable growth of the fluid injection hydrofractures in low-permeability rocks.
      
Results indicate that nonequilibrium effects detected at laboratory scale in low-permeability rocks influence the estimation of unsteady-state relative permeability and capillary pressure.
      
  low-permeability rock
Water Injection into a Low-Permeability Rock - 1 Hydrofracture Growth
      
The flow of water injected into a low-permeability rock is almost perpendicular to the fracture for a time sufficiently long to be of practical interest.
      
Water Injection into a Low-Permeability Rock - 2: Control Model
      
The DFN includes a zone of permeable fractures embedded within a network of lower-permeability fractures and a low-permeability rock matrix.
      
  其他


In order to make the conventional perm eability test device be effectively used for the permeability test of tight rock s,a certain improverment has been done on the dasis of the standard conventional device,by which the tight rock permeability can be tested by use of high press ure stationary flow method under the formation conditions simulated.In testing p rocess,the confined pressures demanded for the testing might be up to 30.0~60.0 MPa and pore pressures 5.0~15.0 MPa,and the permeabilites of less than...

In order to make the conventional perm eability test device be effectively used for the permeability test of tight rock s,a certain improverment has been done on the dasis of the standard conventional device,by which the tight rock permeability can be tested by use of high press ure stationary flow method under the formation conditions simulated.In testing p rocess,the confined pressures demanded for the testing might be up to 30.0~60.0 MPa and pore pressures 5.0~15.0 MPa,and the permeabilites of less than 10×1 0 -5 μm 2 might be measured under such a high pressure.Meanwhile,the i nstantaneous pulse technique,a well developed vital method of measuring the per meabilities of low permeability rocks,was fully examined.Through contrast and a nalysis,it is found that the permeability value measured by the instantaneous pu lse method is very close to that measured by the improved conventional permeabil ity testing method.Because the instantaneous pulse method is based on unsteady state theory and the high pressure conventional testing on steady flow techniqu e,the two methods may be mutually repairable to make up deficiencies.Through a g reat number of experiments,it is proved that the relative error of the permeabil ity values measured by the two method is very small,the difference between the b oth being less than 10%.It fully proves that the improved conventional permeabil ity test device is of reasonableness.

为了使渗透率常规测试装置更能有效地用于致密岩石的渗透率测试 ,我们在标准常规测试渗透率的实验装置基础上作了一定的改善 ,使之能够在模拟地层条件下进行高压稳流法测试致密岩石渗透率 ,在测试过程中 ,实验所需围压可以达到 30 .0~ 6 0 .0MPa ,孔隙压力可以达到 5~ 15 .0MPa ,并在这样的高压状态下测得的渗透率范围可以低于 10 -5μm2 。同时 ,引用目前发展较为成熟的一种测量低渗透岩石渗透率极有生命力的瞬时脉冲技术给予其充分的验证 ,通过相同测试条件下的瞬时脉冲测试方法的对比分析 ,发现两者所测渗透率值非常接近。由于瞬时脉冲法基于非稳态理论 ,而高压下的常规测试则是基于稳流技术 ,所以 ,两种方法可以互相弥补 ,取长补短。经大量实验证明 :这两种方法测得的渗透率相对误差极小 ,两者误差通常小于 10 % ,这一事实充分论证了改进的渗透率常规测试装置具有合理性。

The relationships between the permeability of the reservoir and confined pressure and confined pressure cycle are studied by experiments. The results show that when the confined pressure increases, the pore structure and the skeleton structure of the reservoir change, which results in the reduction of the permeability. Through the analyses of the varying law of the permeability under variable confined pressure, a new expression of presenting the relationship between the permeability and the confined pressure...

The relationships between the permeability of the reservoir and confined pressure and confined pressure cycle are studied by experiments. The results show that when the confined pressure increases, the pore structure and the skeleton structure of the reservoir change, which results in the reduction of the permeability. Through the analyses of the varying law of the permeability under variable confined pressure, a new expression of presenting the relationship between the permeability and the confined pressure is found out, which is a linear combination of two exponential functions. The expression is verified by the testing data of 31 rock samples of 5 low-permeability blocks, and it is shown that the error of it is less than ±5%.

试验研究了低渗透砂岩储层岩石的围压 -渗透率关系和围压 -松弛循环 -渗透率关系 ,试验结果表明 :随围压增加岩石的孔隙结构和骨架结构发生变化 ,引起岩石渗透率的下降 .通过对变围压条件下低渗透岩石渗透率变化规律分析 ,找到了一种新的表征围压 -渗透率关系的公式——指数函数线性组合 ,对 5个低渗透区块的 3 1组岩石样品试验数据进行对比和验证 ,该指数函数线性组合的拟合误差在± 5 %以内

The synthesizing of a great number of references on origin of subnormal pressure and underpressured pools demonstraites that two mechanisms are predominantly responsible for subsurface underpressure. The first, probably the most important one, ascribes to erosional rebound; and the second is the effect of hydrostratigraphy and topography. Other causes, such as chemical osmosis and cooling of fluid, seem to play a minor role in underpressure development. Three typical underpressured pools are classified in terms...

The synthesizing of a great number of references on origin of subnormal pressure and underpressured pools demonstraites that two mechanisms are predominantly responsible for subsurface underpressure. The first, probably the most important one, ascribes to erosional rebound; and the second is the effect of hydrostratigraphy and topography. Other causes, such as chemical osmosis and cooling of fluid, seem to play a minor role in underpressure development. Three typical underpressured pools are classified in terms of trap geometry, accumulating mechanism associated with subnormal pressure development. The first type of conventional stratigraphic pools (except lenticular sandstone body) is sealed by low permeability rocks, with little tendency for downdip and edge water to advance, as well as with petroleum charged frequently from downdip source rocks. The second type of isolated lenticular sandstone body reservoirs,abundant in the deepcentral parts of many basins, is characterized with the full presence of oil and gas and absence of water. Several processes, including compacting, hydrofracturing and capillary phenomena prior to uplifterosion, as well as subsequent inwardshale flow driven by erosional rebound, will be able to explain petroleum charged into and water expelled out of isolated porous sandstone bodies. The third type of gas accumulations in lowpermeability reservoirs commonly is located in a basincenter and is downdip from waterbearing rocks. Underpressured gas accumulations evolve from overpressured accumulations due to regional or local structural uplift. Two casestudies, southwestern Alberta Basin and Baise Basin (southwestern China),both experiencing regional structural uplifterosion, indicate that hydrodynamicallyclosed underpressured systems facilitate petroleum accumulation and preservation.

地下异常低压主要有两种成因:抬升—剥蚀反弹和在介质孔隙度、渗透率非均质性条件下的区域地下水稳态流动,而化学渗透与流体"冷却"在低压形成中只起次要作用。根据圈闭类型、储盖组合及成藏过程,将低压油气藏分为三种类型:1常规地层型(除砂岩透镜体外)低压油气藏,低渗透岩石通常起遮挡作用,底水与边水不发育;2砂岩透镜体低压油气藏,通常分布于盆地中心的深部,具有不含水、充满油气的特点,油气的充注和水的排出与构造抬升之前压实作用、超压引起的水驱裂缝和毛细管力的作用有关,抬升—剥蚀引起的异常低压导致水由砂岩向页岩的流动有助于油气藏中水的排出;3深盆区低渗透储层低压气藏,通常分布在含水层的下倾方向(气水倒置),异常低压是由于构造抬升致使超压向低压演化的结果。实例研究表明,构造抬升盆地中的低压系统是一个水动力相对封闭的体系,有利于油气的聚集与保存。

 
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