为实现高煤阶煤储层煤层气井的高效开采,对高煤阶煤储层寺河3号煤层进行了流速敏感性和应力敏感性试验分析,并且结合现场工程,研究了高煤阶煤储层敏感性对煤层气井排采的影响。试验结果表明,高煤阶煤储层具有流速敏感性,流速敏感性损害最严重时渗透率降为初始值的50%,换向驱替时渗透率也降低,最小降低为初始值的62.1%;黏土含量越高的储层,渗透率的降低幅度也越大。高煤阶煤储层具有强应力敏感性,而且存在明显不可逆性;净围压从2 MPa升高到5 MPa,渗透率降低为初始渗透率的20%~50%,升压后再降压,渗透率不能恢复到初始水平,不可逆损害率最大超过50%;渗透率越低的储层,应力敏感性越强。煤层气井的排采,尤其在排采初期,应遵循连续、缓慢、稳定的原则。

In order to realize the efficient exploitation of coalbed methane in high-rank coal reservoir,the velocity sensitivity and stress sensitivity of Sihe No.3 coal seam were experimented and analyzed.Based on the engineering,the influence of high-rank coal reservoir sen-sitivity on coalbed methane wells production was analyzed.The experimental results showed that,high-rank coal reservoir had the feature of velocity sensitivity,the permeability could reduce to 50% of initial value to the maximum extent,directional flooding would also reduce per-meability,the minimum reduce to 62.1% of initial value,the higher the clay content of the reservoir was,the lower the permeability decrea-sing amplitude would be.The high-rank coal reservoir had a strong stress sensitivity and existed apparent irreversibility;when the net confi-ning pressure increased from 2 MPa to 5 MPa,the permeability decreased as 20%~50% of the initial permeability,after the buck boost, the permeability could not resume

随着常规油气资源的枯竭，超低渗透油藏已成为我国能源增储上产的主要物质基础。其中相对渗透率曲线对油田开发起到至关重要的作用。而微观孔喉结构对相对渗透率影响巨大。但是目前的相对渗透率的计算方法无法体现微观孔喉结构的影响。因此利用通过室内物理实验的结果，通过修正Brooks‐Corey模型建立了考虑边界层、贾敏效应和微观孔喉分布的相对渗透率计算方法。结果表明，相同渗透率的长庆超低渗透油藏孔喉分布范围更大，导致长庆超低渗透油藏两相区更宽，油相相对渗透率更大，高含水阶段相渗变化更剧烈。对于大庆和长庆超低渗透油藏的成功开发奠定了坚实的理论基础。

As conventional oil and gas resources are exhausted ,ultra‐low permeability reser‐voirs are the basis of the energy in the country .Relative permeability curves are the key fac‐tor to development .Micro pore and throat structure has a significant effect on relative perme‐ability curves .However ,existing methods to calculate permeability curves cannot take micro pore and throat structure into consideration .T herefore in this paper a new method consider‐ing the effect of boundary ,Jamin and micro pore‐throat distribution is established by modi‐fied Brooks‐Corey model .It is found that compared to ultra‐low permeability reservoir of Daqing Field ,Daqing Field has a wider distribution of pore and throat .As a result ,the region of two phase of Changqing Field is wider .Oil relative permeability of Changqing Field is lar‐ger .Relative permeability curve of Changqing Field changes more seriously when water cut is high .That is the theoretical basis to the successful dev

异常高压低渗透油藏具有较丰富的天然驱动能量，开发过程存在受启动压力梯度和应力敏感效应的影响。常规油藏弹性采收率的计算忽略了启动压力梯度和应力敏感效应的影响，计算方法不适用于异常高压低渗透油藏。在考虑启动压力梯度和应力敏感效应的基础上，建立了异常高压低渗透油藏弹性采收率计算方法，推导了弹性采收率计算公式，通过实例定性地分析了其影响因素，探讨提高弹性采收率的开发措施。研究表明，弹性采收率与渗透率变化系数、泄油半径、井底流压以及启动压力梯度成反比。建立的方法为异常高压低渗透油藏弹性采收率计算提供了一种理论思路，具有一定的理论和实际意义。

Abnormal high pressure and low permeability reservoir has abundant natural driving energy. Threshold pressure gradient and stress sensitivity effect exist in the development. Elastic recovery calculation methods of conventional reservoir neglect the threshold pressure gradient and stress sensitivity effect, so it is not suitable for abnormal high pressure and low permeability reser-voir. Considering the factors above, this paper established the calculation method, derived the calculation formula, analyzed the in-fluence factors through practical examples qualitatively and discussed development measures for the improvement of elastic recov-ery. Researches showed that elastic recovery is in inverse proportion to permeability variation coefficients, drainage radius, bottom hole flowing pressure and threshold pressure gradient. This method provides a theoretical thought for elastic recovery calculation of abnormal high pressure and low permeability reservoir. It has certain theoretical and

针对长庆油田五里湾区特低渗透油藏地层水矿化度高、渗透率低,传统的＂三采＂增产措施难于开展的问题,开展了聚合物纳米球驱技术研究。利用粒度仪、透射电子显微镜、单管填砂模型以及真实岩心微观模型和双管并联填砂模型从聚合物纳米球的膨胀性、注入性、降低水相渗透率性以及室内模拟驱油几个方面系统研究了其在特低渗透油藏中的适应性。实验结果表明,聚合物纳米球具有良好的注入性,在地层水中可以发生膨胀,并能有选择地降低高渗管的水相渗透率,具有液流改向作用,可有效动用残余油,提高采收率效果显著。聚合物纳米球驱可以作为长庆油田五里湾区特低渗透油藏有效的增产手段,该研究为现场应用提供了实验依据。

Because of aiming at high formation water salinity and extra-low permeability in Block Wuliwan Changqing oilifeld, traditional stimulation measures in EOR were dififcult to implement. So the polymeric nanospheres lfooding technology was discussion in this paper. Using the particle size analyzer and transmission electron microscopy, based on the single sand packs model and the real core visual micro-model and parallel sand packs macro-model, the adaptability of polymeric nanospheres lfooding in extra-low perme-ability reservoir was studied from the aspects of the swelling, injection of polymeric nanospheres, water-permeability reduction as well as laboratory simulated lfooding of polymeric nanospheres. The experimental results proved that the polymeric nanospheres had good injection and could swell in formation water. The expanded nanospheres could selectively reduce the water phase permeability of the high-permeability sand packs, and made lfuid diverting to effectively displace residu

利用变温水热合成法在α-Al2O3陶瓷管上合成Silicalite-1沸石膜,对合成的Silicalite-1沸石膜进行XRD(X射线衍射)和SEM(扫描电镜)表征,通过单组分气体渗透试验对沸石膜管的渗透分离性能进行测试,测试发现在常温常压下H2/N2和H2/C3H8的理想分离因数分别为3.51和28.33,H2的渗透率为1.46×10-6 mol/(m2·s·Pa),通过XRD、SEM及单组分气体渗透测试可以看出,变温晶化合成的沸石膜是具有高选择性和高渗透率的Silicalite-1沸石膜.

High-permeance Silicalite-1 zeolite membranes was prepared on the porous α-Al2O3 support by varying-temperature hydrothermal synthesis,zeolite membrane was characterized by means of XRD、SEM and Single-gas permeance measurement.XRD pattern showed that the membrane was Silicalite-1 zeolite membrane.SEM analysis indicated that few defects existed in the membrane and thickness of the membrane was about 13μm, Single-gas permeation results showed that the ideal separation factors were 3.51 for H2/N2 and 28.33 for H2/C3H8 at room temperature respectively. The permeability ratio of H2 was up to 1.46×10-6mol/(m2·s·Pa).XRD、SEM and single-gas permeation confirmed that the Silicalite-1 zeolite membrane as-synthesized on the porous α-Al2O3 support was high-selectivity and high-permeance silicalite-1 zeolite membrane.