准噶尔盆地中部3区块侏罗-白垩系储层成岩作用及孔隙形成机理  

Diagenesis and Pore Formation Mechanism of Jurassic and Cretaceous Reservoirs in Block 3 in the Middle of Junggar Basin

作　　者：徐国盛[1] 李建林[1] 朱平[1] 廖丰[1] 廖义沙[1] 

机构地区：[1]成都理工大学"油气藏地质及开发工程"国家重点实验室,四川成都610059

出　　处：《石油天然气学报》2007年第3期1-7,502,共7页Journal of Oil and Gas Technology

基　　金：国家重点基础研究发展规划(973)项目(G1999043309)

摘　　要：准噶尔盆地中部3区块侏罗-白垩系储层以原生粒间孔为主,次生孔隙为辅,成岩作用对孔隙的形成与演化起重要的控制作用。详细论述了破坏性与建设性成岩作用的特征,根据自生矿物类型及其形成温度、有机质热成熟度、储集层物性及孔隙结构类型的演化将侏罗-白垩系碎屑岩成岩变化划分为早成岩阶段A期、B期和中成岩阶段A期、B期2个阶段4个期次;定量计算了孔隙形成与演化的消长量,指出次生孔隙形成主要为早期的淡水溶蚀,部分为中晚期的有机热液溶蚀。In Jurassic and Cretaceous reservoirs of Block 3 in the middle of Junggar Basin, primary intergranular pore was dominated and secondary pore was next. Diagenesis controls the pore formation and evolution. The characteristics of destructive and constructive diageneses were discussed. Based on the type of authigenic mineral and its forming temperature, thermal maturity of organic mass, reservoir physical property and the evolution of pore structural type, the diagenetic changes of Jurassic and Cretaceous clastic rocks are divided into early diagenetic stage A,B and middle diagenetic stage A and B. the depletion of pore formation and evolution is quantitatively calculated. It is pointed out that the secondary pore formation is early fresh water dissolution, part of it is thermal organic dissolution at the middle and later stages.

关 键 词：储集层 原生孔隙 次生孔隙 成岩作用 孔隙演化 准噶尔盆地 侏罗系 白垩系 

分 类 号：P618.13[天文地球—矿床学]