济阳坳陷桩海地区下古生界硅化岩溶储集层空间分布模式  

Spatial distribution pattern of silicified karst reservoir of the Lower Paleozoic in Zhuanghai area of Jiyang Depression

作　　者：许淑梅[1,2] 翟玉兰[2] 王金铎[3] 于建国[3] 韩文功[4] 李三忠[1,2] 马云[2] 

机构地区：[1]中国海洋大学海底科学与探测技术教育部重点实验室,山东青岛266100 [2]中国海洋大学海洋地球科学学院,山东青岛266100 [3]中国石化胜利油田有限公司物探研究院,山东东营257001 [4]中国石化胜利油田有限公司,山东东营257001

出　　处：《古地理学报》2010年第2期220-232,共13页Journal of Palaeogeography：Chinese Edition

摘　　要：基于岩心描述和镜下观察,分析了研究区下古生界硅化岩溶储集层的岩性特征。通过对沟通潜山断块和古近纪洼陷的边界断层产状、潜山断块内下古生界产状的分析,认为下古生界碳酸盐岩具备埋藏岩溶作用条件,提出了古近纪沉积物压释酸性水向潜山断块运移的3种方式,即:翘倾端断面补给畅流运移模式、倾没端断面补给畅流运移模式和背斜凸起两侧双向入渗补给对流循环模式。利用这3种模式可以合理解释研究区下古生界潜山硅化岩溶储集层空间分布的特点和规律。翘倾端断面补给畅流运移模式可以解释潜山断块高部位硅化岩溶层段储集层的发育情况,倾没端断面补给畅流运移模式和背斜凸起两侧双向入渗补给对流循环模式,可以解释潜山断块的低部位硅化岩溶层段储集层的发育情况。该模式还可以合理地解释硅化岩溶储集层在下古生界赋存层位的"穿层性"特点,同时也能够合理解释潜山断块周缘发育硅化岩溶层段,而潜山断块中心地带很少出现硅化岩溶层段等现象。By core description and micro-observation, the characteristic of the silicified karst reservoir of the Lower Paleozoic were analyzed in Zhuanghai area of Jiyang Depression. By analyzing the burial condition, source and hydrodynamic characteristics of the groundwater of the Lower Paleozoic, the authors proposed that the silicified karst process occurred in the deeply buried condition. The authors put forward 3 migration models of the press release water of the Paleogene sediments on the basis of exploring the boundary fault occurrence connecting the buried-hill with the Paleogene subsag and the strata occurrence of the Lower Paleozoic carbonate. The 3 migration models include： 1） open-fluid migration model of the tilted side faulted-block supply, 2） open-fluid migration model of the down-dip faulted-section supply, 3） convective circulation model of the two-way infiltration supply along two sides of the anticline block. Migration models of the press release water can be used to explain the distribution characteristics of the silicified karst reservoir in buried hills. Open-fluid migration model of the tinted side faulted-section supply can explain that the silicified karst reservoir is well developed in high position of some buried hills, while the other two models of the press release water can explain that silicified karst reservoir is well developed in low position of some buried hills. These 3 migration models together can also explain the ＂cross-layer character＂ of the silicified karst in the Lower Paleozoic carbonate rationally. The characters that silicified karst reservoir is well developed around the peripheral buried hills faulted blocks while not developed in the core zone of buried hills faulted block can be interpreted by these 3 migration models of the press release water.

关 键 词：压释水 储集层 硅化岩溶 下古生界桩海地区 济阳坳陷 

分 类 号：TE122.21[石油与天然气工程—油气勘探]