CAJ | 학술논문

为了评价川西新场须四段致密砂岩储层，应用恒速压汞及核磁共振实验方法对储层微观孔喉与可动流体变化特征进行定量分析。结果表明，须四段致密砂岩储层可动流体参数、喉道特征参数及孔隙参数变化幅度大。微裂隙发育的致密砂岩储层孔隙对可动流体参数的影响较喉道要更大一些，在微观上可动流体参数主要受孔隙控制。孔喉半径比较大、分布范围宽是致密砂岩储层可动流体含量低、可动用程度差的主要原因之一。微裂隙发育的致密砂岩储层具有喉道进汞饱和度较孔隙进汞饱和度高的特点，说明新场须四段致密砂岩储层的储集空间类型主要为孔隙-裂缝型。
위료평개천서신장수사단치밀사암저층，응용항속압홍급핵자공진실험방법대저층미관공후여가동류체변화특정진행정량분석。결과표명，수사단치밀사암저층가동류체삼수、후도특정삼수급공극삼수변화폭도대。미렬극발육적치밀사암저층공극대가동류체삼수적영향교후도요경대일사，재미관상가동류체삼수주요수공극공제。공후반경비교대、분포범위관시치밀사암저층가동류체함량저、가동용정도차적주요원인지일。미렬극발육적치밀사암저층구유후도진홍포화도교공극진홍포화도고적특점，설명신장수사단치밀사암저층적저집공간류형주요위공극-렬봉형。
In order to evaluate the tight sandstone reservoirs in the 4th member of the Xujiahe Formation in the Xinchang area of the western Sichuan Basin, nuclear magnetic resonance and constant-rate mercury intrusion ex-periments have been carried out to quantitatively analyze micro pore and throat and moveable fluid variation char-acteristics. Studies have indicated that the moveable fluid parameters, throat parameters and pore parameters of tight sandstones vary largely. In micro-fractured tight sandstones, pores have an advantage over throats affecting the moveable fluid parameters, and the moveable fluid parameters are mainly controlled by pores. Low moveable fluid content and low producing degree of tight sandstones are mainly caused by the relatively long radius and wide distribution of pores and throats. In micro-fractured tight sandstones, the mercury saturation in throats is higher than that in pores, indicating that the dominant type of reservoir space is pore-fracture type in the 4th member of the Xujiahe Formation, the Xinchang Gas Field.