CAJ | 학술논문

采用普通薄片、铸体薄片、扫描电镜、x衍射及高压压汞等多种技术手段,对鄂尔多斯盆地安塞油田Y区块长6储层的孔隙特征进行研究,并结合储层的沉积环境、岩性特征和成岩演化过程对影响储层孔隙发育的因素进行了深入分析。结果表明,研究区长6储层岩性主要为长石细砂岩;孔隙类型以溶蚀孔及残余粒间孔为主;成岩演化目前均已达到晚成岩A期;沉积环境和成岩作用是影响储层孔隙发育的主要因素,不同的沉积微相直接影响储层砂岩的成分成熟度和结构成熟度的程度;压实作用是造成孔隙减小的主要因素;而碳酸岩、浊沸石等的胶结作用一方面降低粒间孔隙,一方面支撑骨架,增强储层抗压实能力,同时为后期的溶蚀作用产生次生孔隙提供了空间和物质基础;另外,溶蚀作用的多次发生,改变了孔隙结构,使得次生孔隙发育。
채용보통박편、주체박편、소묘전경、x연사급고압압홍등다충기술수단,대악이다사분지안새유전Y구괴장6저층적공극특정진행연구,병결합저층적침적배경、암성특정화성암연화과정대영향저층공극발육적인소진행료심입분석。결과표명,연구구장6저층암성주요위장석세사암;공극류형이용식공급잔여립간공위주;성암연화목전균이체도만성암A기;침적배경화성암작용시영향저층공극발육적주요인소,불동적침적미상직접영향저층사암적성분성숙도화결구성숙도적정도;압실작용시조성공극감소적주요인소;이탄산암、탁비석등적효결작용일방면강저립간공극,일방면지탱골가,증강저층항압실능력,동시위후기적용식작용산생차생공극제공료공간화물질기출;령외,용식작용적다차발생,개변료공극결구,사득차생공극발육。
Using ordinary thin sections,casting thin seetions,SEM,X-ray diffraction,high pressure mercury and other technical means to study on pore characteristics of Chang 6 reservoir in Ansai oilfield, Ordos basin,and then combined with the sedimentary environment,lithologic feature and diagenetic evolution of the reservoirs to analyse deeply the factors that affected the reservoir porosity . The result shows that the lithologic of Chang 6 reservoir is mainly of feldspar fine sandstone;The main pore types of the reservoir include dissolution pores and residual intergranular pore;Diagenetic evolution has reached late diagenetic A stage;Depositional environments and diagenesis are major factors of reservoir porosity. Different sedimentary microfacies direct effect the degree of the composition maturity and structure maturity of the reservoir sandstones. Compaction is the main factors of pore reducing;on the one hand,the cementation of carbonatite and laumonite reduce the intergranular porosity,on the other hand, support the frame, and enhance the ability to resist compaction. Furthermore, it can provided space and material for the dissolution of secondary pores in the later. In addition, the dissolution changing the pore structure, making secondary pore development.