溶蚀在形成碱性火山岩优质储集层中的作用--以准噶尔盆地陆西地区石炭系火山岩为例  

Effect of Dissolution on Forming High-Quality Reservoir in Alkaline Volcanic Rocks——An example from Carboniferous volcanic rocks in Luxi area in Junggar basin

作　　者：雷天柱[1] 石新璞[2] 孔玉华[2] 张顺存[1] 方琳浩[1] 史基安[1] 

机构地区：[1]中国科学院地质与地球物理研究所,兰州730000 [2]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000

出　　处：《新疆石油地质》2008年第3期306-308,共3页Xinjiang Petroleum Geology

基　　金：国家重点基础研究计划发展(973)项目(2006CB202305);国家自然科学基金项目(40643016)资助

摘　　要：对准噶尔盆地陆西地区火山岩的研究中发现,溶蚀作用是喷溢相碱性火山岩中优质储集层形成的主要因素,并对溶蚀机理、酸性流体的来源进行了探究。认为无机酸与有机酸的溶蚀机理不同,无机酸主要靠带走K+、Na+等阳离子实现溶蚀,而有机酸主要靠增加Al3+的活度实现溶蚀,指出酸性流体主要来自火山脱气、沿深大断裂上溢的深部酸性流体和有机质,据此,推断出火山口附近、深大断裂两侧和生烃凹陷附近将是勘探有利区带。在陆西地区,最有利区域位于夏盐2井至达1井一线和石西地区,次级有利区为夏盐1井到石南4井一线和玛东2井到陆2井一线。The study on volcanic rocks from Luxi area in Junggar basin shows that the dissolution of the alkaline volcanic rocks of overflow facies is a key factor to form high-quality reservoir. The discussion of the origin of acidic fluids and mechanism of dissolution suggests that there are different dissolution mechanisms between inorganic acids and organic acids. The inorganic acids mainly take K^＋, Na^＋ and other ions away to have a dissolution, however, the organic acids largely depend on increasing the activity of Al^3＋ for it. The acidic fluids for dissolution were derived from volcanic degasification, fluids overflowed upwards along the deep faults and organic matter. It is concluded that the adjacent to craters, lateral of deep faults and hydrocarbon-generation sags would be the favorable zone for petroleum prospecting. In Luxi area, the most potential zones could be found in line from Well Xiayan-2 to Well Da-1 and Shixi area. In addition, the more notential zones nlace in line from Well Xiayan-1 to Well Shinan-4 and from Well Madong-2 to Well Lu-2.

关 键 词：准噶尔盆地 溶解作用 碱性 火山岩 储集层 

分 类 号：TE112.2[石油与天然气工程—油气勘探]