盐家地区沙四段上亚段砂砾岩体储层特征及成岩演化  

Diagenesis evolution characteristics of glutenite reservoir in Yanjia area

作　　者：田美荣[1] 

机构地区：[1]中国石化股份胜利油田分公司地质科学研究院,山东东营257015

出　　处：《油气地质与采收率》2011年第2期30-33,48,共5页Petroleum Geology and Recovery Efficiency

基　　金：国家重大专项"渤海湾盆地东营凹陷勘探成熟区精细评价示范工程"(2008ZX05051)

摘　　要：复杂砂砾岩体储层岩性混杂、物性变化及成岩演化特征复杂,制约了盐家地区沙四段上亚段砂砾岩体的储层评价及勘探部署。应用岩心、测井资料以及大量的分析化验数据对该区砂砾岩体储层特征及成岩演化差异性进行了研究。结果表明:盐家地区沙四段上亚段储层岩性以含砾砂岩为主;储层物性受沉积相带控制,近岸水下扇扇根亚相物性最差,扇中亚相物性最好,扇缘亚相物性变差。在成岩演化方面,扇根成岩作用主要以压实作用和强烈胶结作用为主,次生孔隙不发育;扇中则压实、胶结、溶解及交代作用均可发生,次生孔隙发育;扇缘压实、胶结作用发育,常发育超压裂缝。在此基础上,建立了盐家地区沙四段上亚段砂砾岩储层成岩演化模式。The lithology, physical property complexity and diagenesis evolution of conglomerate reservoir is very complex, and restricts reservoir evaluation and exploration strategy of conglomerate fan in upper fourth member of Shahejie formation in Yanjia area. Through analyzing the characteristics of conglomerate reservoir and diversity of diagenesis evolution based on the core, well logging data and examination data, it is considered that the lithology of conglomerate reservoir is mainly consisted of pebbled sandstones in upper fourth member of Shabejie formation in Yanjia area, accounting for nearly 60% of the lithology of conglomerate reservoir. The physical properties are controlled by sedimentary facies belts , worst in upper fan, best in mid fan, becoming favorable from the mid fan to the lower fan. In diagenesis evolution, it chiefly includes compaction and intense cementation in upper fan, in which the secondary pore is undeveloped; and compaction, cementation, dissolution and replacement in mid fan, in which the secondary pore developed; compaction and cementation in lower fan and over-pressure fracture occurred. Finally it is established that the individual evolution model stemmed from different phase belt of conglomerate reservoir.

关 键 词：砂砾岩体 储层特征 成岩演化 成岩 作用盐家地区 

分 类 号：TE112.23[石油与天然气工程—油气勘探]