CAJ | 학술논문

利用岩石薄片、扫描电镜、电子探针、能谱分析、包裹体测温及拉曼光谱分析等方法,对苏里格气田苏6区块下石盒子组8段储层的孔隙发育特征进行研究。结果表明：储层残余原生粒间孔占现今孔隙的3．0%,次生孔隙中溶蚀孔隙占67．5%,黏土矿物晶间孔占29．5%；储层次生孔隙的形成主要经历两期溶蚀作用,Ⅰ期溶蚀为酸性环境下长石、岩屑等的溶蚀,形成的次生孔隙多在后期成岩过程中损失,Ⅱ期溶蚀为偏碱性环境长石、高岭石等的溶蚀,形成的次生孔隙对现今储层起到主要的贡献；偏碱性环境下钾长石的溶解为高岭石的伊利石化反应提供K+,促进了高岭石的转化,而高岭石的伊利石化使得孔隙流体中K+的浓度降低,促进了长石的溶解,两者的协同反应是次生孔隙形成的主要原因；Ⅰ期溶蚀作用的强弱直接关系到Ⅱ期溶蚀反应的程度,Ⅰ期溶蚀反应强烈,能够保证Ⅱ期溶蚀协同反应的充分进行。
이용암석박편、소묘전경、전자탐침、능보분석、포과체측온급랍만광보분석등방법,대소리격기전소6구괴하석합자조8단저층적공극발육특정진행연구。결과표명：저층잔여원생립간공점현금공극적3．0%,차생공극중용식공극점67．5%,점토광물정간공점29．5%；저층차생공극적형성주요경력량기용식작용,Ⅰ기용식위산성배경하장석、암설등적용식,형성적차생공극다재후기성암과정중손실,Ⅱ기용식위편감성배경장석、고령석등적용식,형성적차생공극대현금저층기도주요적공헌；편감성배경하갑장석적용해위고령석적이리석화반응제공K+,촉진료고령석적전화,이고령석적이리석화사득공극류체중K+적농도강저,촉진료장석적용해,량자적협동반응시차생공극형성적주요원인；Ⅰ기용식작용적강약직접관계도Ⅱ기용식반응적정도,Ⅰ기용식반응강렬,능구보증Ⅱ기용식협동반응적충분진행。
Pore characteristics of the tight sandstone reservoir of the 8th Member of the Lower Shihezi Formation in Su 6 area of Sulige gas field were analyzed using a series of techniques, including thin section identification, scan electron microscope, electron probe micro-analysis and energy spectrum, homogenization temperatures and Raman microprobe method of fluid in-clusions. The results show that primary remained intergranular pores account for 3. 0% of total pores, and the secondary pores which contain dissolved pores and intercrystalline pores in clay minerals, account for 67. 5% and 29. 5% respectively. There are two stages of dissolution to form the secondary pores. The first dissolution is the dissolution of feldspar and debris dissolution under acid condition, and the early dissolution pores are usually damaged and disappeared after the later compac-tion and cementation. The second dissolution under mild alkaline condition dissolves feldspar and kaolinite to form secondary pores and illite, which has a main contribution to reservoir. Dissolution of potassium feldspar provides K+ to the transforma-tion of kaolinite to illite to promote the transformation of kaolinite, and the transformation of kaolinite results in reducing K+concentration to promote the dissolution of potassium feldspar. The two processes ( cooperative reaction) cooperating with each other are the dominant reasons of generation of secondary pores. The extent of first dissolution directly affects the second dissolution, and the strong dissolution reaction of first dissolution should be helpful in finishing the cooperative reaction of second dissolution.