CAJ | 학술논문

根据核磁共振（ NMR）岩心实验分析的基本原理、方法和相关参数模型的研究进展，对鄂尔多斯盆地东部ZC油田3062井延长组长6油层组低孔渗砂岩样品进行了储层物性、孔隙结构和束缚水饱和度等参数的NMR岩心实验分析，并将其与常规岩心测试参数进行了分析与对比，探讨了低孔渗储层NMR岩心实验分析的精度及其应用效果。结果表明，3062井长6油层组砂岩属于典型的低孔渗储层，孔隙度在8．6％～13．0％，渗透率在（0．07～1．27）×10－3μm2；低孔渗砂岩样品NMR岩心实验所分析的孔隙结构、孔隙度、束缚水饱和度数据与其常规岩心分析结果基本一致，且系统偏差较小，但基于NMR实验参数的储层渗透率预测模型尚存在较多的不确定性，核磁共振渗透率预测结果与常规岩心分析渗透率数据存在较大偏差。
근거핵자공진（ NMR）암심실험분석적기본원리、방법화상관삼수모형적연구진전，대악이다사분지동부ZC유전3062정연장조장6유층조저공삼사암양품진행료저층물성、공극결구화속박수포화도등삼수적NMR암심실험분석，병장기여상규암심측시삼수진행료분석여대비，탐토료저공삼저층NMR암심실험분석적정도급기응용효과。결과표명，3062정장6유층조사암속우전형적저공삼저층，공극도재8．6％～13．0％，삼투솔재（0．07～1．27）×10－3μm2；저공삼사암양품NMR암심실험소분석적공극결구、공극도、속박수포화도수거여기상규암심분석결과기본일치，차계통편차교소，단기우NMR실험삼수적저층삼투솔예측모형상존재교다적불학정성，핵자공진삼투솔예측결과여상규암심분석삼투솔수거존재교대편차。
Nuclear magnetic resonance ( NMR) core experimental analysis is a new developing technique in experi?mental geology. Based on the principles and methods of NMR core experimental analysis, as well as some improved parametric models, a series of reservoir parameters of Chang6 low?porosity and low?permeability oil?bearing sand?stone core samples from well 3062 in the ZC Oil Field in the eastern Ordos Basin were systematically measured by NMR. Additionally, the accuracy and relative error of the NMR analysis were calculated and discussed by means of recognized exact method of conventional core experimental analysis as control group. It is revealed that the Chang6 oil?bearing sandstones are typical low?porosity and low?permeability reservoirs, with porosity ranging from 8.6% to 13.0%, and permeability from 0.07×10-3 to 1.27×10-3μm2 . NMR core experimental analysis has advantages of con?venience, high efficiency and accepted accuracy with a smaller relative error for testing the low?porosity and low?permeability reservoir parameters of porosity, microscopic pore structure and irreducible water saturation. However, compared with the results of conventional core analysis, there is a larger relative error in NMR prediction for the permeability parameters, which is most probably due to some uncertainty of the reservoir permeability predictive models.