[地质]前三角洲
It can be divided into 2 subfacies of fan delta-front and fan prodelta,and 6 microfacies. 可进一步分为扇三角洲前缘和前扇三角洲两个沉积亚相及六个微相。
The sparse prodelta turbidite dist ributed on the eastern abrupt margin of the basin and the depositional systems came f rom the east . 后者发育于盆地中部的东缘陡坡带 ,物源由东向西推进。
Distributary channel was well developed, prodelta was relatively not well developed and delta front was dominated by subaqueous distributary channel deposits. 研究区三角洲平原分流河道沉积极为发育，前三角洲相对不发育，三角洲前缘也以水下分流河道沉积为主。
The interpretation of a typical sub-bottom profile reveals that the diapir of the Yellow River delta resulted from the interior deformation of soft prodelta layers at the delta front. 高分辨率黄河三角洲典型的地震地层和解释地层剖面、浅地层剖面和钻孔资料联合解释表明,海底刺穿的发源层来自于河口沙坝下部的前三角洲相软弱层变形。
Keywords Western Sichuan Depression;shallow gas reservoir;sealing ration of fault;permeability of fault;seismic facies;sedimentary facies;prodelta facies sand;channel facies;sand; 川西凹陷;浅层气藏;断层封堵性;断层渗透性;地震相;沉积相;三角洲前缘相;河道相;砂体;
