CAJ | 학술논문

综合运用岩心观察、薄片鉴定、物性分析、压汞分析及试油分析等技术方法，对华庆地区长63段低渗储层特征进行了系统研究，分析了低渗储层的成因，并探讨了优质储层的主控因素。结果表明，华庆地区长63段储层的厚层块状砂岩主要由具有液化流性质的砂质碎屑流沉积形成的相对较厚块状砂岩纵向叠置组成。岩石类型主要为长石砂岩，其次为岩屑长石砂岩；储层具有低孔特低孔特低渗透超低渗透特征；储集空间主要包括粒间原生孔隙、次生溶蚀孔隙及晶间微孔隙，为小孔微细喉型孔隙结构。杂基含量高、成分成熟度和结构成熟度差是华庆地区长63低渗储层形成的主控因素，压实作用对其形成起到强化作用。沉积鼎盛时期水动力强的主力沉积期次，形成泥质含量较低的砂岩是优质储层形成的主控因素，而较大的储层厚度是优质储层形成的必要条件。
종합운용암심관찰、박편감정、물성분석、압홍분석급시유분석등기술방법，대화경지구장63단저삼저층특정진행료계통연구，분석료저삼저층적성인，병탐토료우질저층적주공인소。결과표명，화경지구장63단저층적후층괴상사암주요유구유액화류성질적사질쇄설류침적형성적상대교후괴상사암종향첩치조성。암석류형주요위장석사암，기차위암설장석사암；저층구유저공특저공특저삼투초저삼투특정；저집공간주요포괄립간원생공극、차생용식공극급정간미공극，위소공미세후형공극결구。잡기함량고、성분성숙도화결구성숙도차시화경지구장63저삼저층형성적주공인소，압실작용대기형성기도강화작용。침적정성시기수동력강적주력침적기차，형성니질함량교저적사암시우질저층형성적주공인소，이교대적저층후도시우질저층형성적필요조건。
The comprehensive methods , including core observation , thin‐section examination , physical property analysis ,mercury porosimetry ,and oil test ,have been used to systematically study the characteristics of the low permeability reservoirs of Chang 63 Member in Huaqing area ,analyze its origin ,and discuss the main controlling factors of high quality reservoirs .The results show that the thick massive sandstones of the reservoirs of Chang 63 Member in Huaqing area are mainly composed of vertically stacked sandstones that are formed by liquefied sandy clastic flow .The rocks mainly consist of arkose with minor lithic arkose .The reservoirs are characterized by the low to particularly low porosity and permeability .The pores of the reservoir are primarily intergranular pores ,secondary erosion pores , and intercrystalline micropores , the so called micro‐fine throat structures . The formation of low permeability reservoirs of Chang 63 Member in Huaqing area is mainly controlled by the high matrix content ,low textural ,and low compositional maturation ;and it is further strengthened by compaction . Under a suitable water dynamics with low mud content ,a thick sandstones could develop into a high quality reservoir .