CAJ | 학술논문

为了开发低渗透储层饱和度指数测量方法,分别应用半渗透隔板法毛管压力-电阻率联测和离心法测量4种典型低渗透储层的饱和度指数 n,对比分析饱和度指数测量结果的差异性和机制,结合储层饱和度测井评价考察方法的适应性。结果表明：对于2×10-3~4×10-3μm2以上的低渗透岩心,两种方法均适用；当渗透率小于2×10-3~4×10-3μm2时,由于存在毛管压力与电阻率不平衡和“蒸发”的影响,离心法的适应性变差,隔板法仍然适用,但适应性会受到隔板突破压力的限制；隔板法能够同时提供毛管压力曲线用于划分储层类型,并给出相应的饱和度指数,有助于应对低渗透储层的非均质性。
위료개발저삼투저층포화도지수측량방법,분별응용반삼투격판법모관압력-전조솔련측화리심법측량4충전형저삼투저층적포화도지수 n,대비분석포화도지수측량결과적차이성화궤제,결합저층포화도측정평개고찰방법적괄응성。결과표명：대우2×10-3~4×10-3μm2이상적저삼투암심,량충방법균괄용；당삼투솔소우2×10-3~4×10-3μm2시,유우존재모관압력여전조솔불평형화“증발”적영향,리심법적괄응성변차,격판법잉연괄용,단괄응성회수도격판돌파압력적한제；격판법능구동시제공모관압력곡선용우화분저층류형,병급출상응적포화도지수,유조우응대저삼투저층적비균질성。
In order to develop an experimental method for measuring saturation exponent, a porous plate method for capillary pressure-resistivity connection survey and a centrifuge method were used respectively to determine the saturation index for four low permeability reservoirs, and the differences in the measurements were compared accordingly. In addition, the different mechanism and applicability of these two methods were analyzed using the saturation measurements from well logs. The re-sults show that the centrifuge method is not applicable when the permeability is lower than 2×10-3 μm2 to 4×10-3 μm2 be-cause of the disequilibrium of capillary pressure and resistivity, as well as the effect of evaporation. However, the porous plate method is preferably applicable when the work pressure is not higher than the breakthrough pressure. The porous plate method can provide both saturation index and capillary pressure curve, which can be used to determine the reservoir type and its saturation index, thus can be applied to deal with heterogeneity in reservoirs.