塔河油田七区奥陶系缝洞型储层成岩作用特征  

Diagenesis characteristics of ordovician carbonate reservoir in 7th zone of Tahe Oilfield

作　　者：徐守余[1] 路研 王淑萍[1] 栗亮 李月[1] Xu Shouyu Lu Yah Wang Shuping Li Liang Li Yue(School of Geosciences, China University of Petroleum（East China）, Qingdao 266580, Chin)

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580

出　　处：《黑龙江科技大学学报》2016年第5期485-489,共5页Journal of Heilongjiang University of Science And Technology

基　　金：国家油气重大专项(2011ZX05009-003)

摘　　要：塔河油田奥陶系岩溶缝洞型储层受成岩作用影响较大。基于岩心录井、镜下分析、流体包裹体测温等资料,结合野外露头观察,探讨研究区碳酸盐岩基质及大型溶洞充填物的成岩作用特征。研究发现:塔河七区碳酸盐岩基质的成岩作用类型多样,以强压实、强溶蚀、弱胶结为特征;而溶洞充填物的成岩作用类型主要以弱压实、弱溶蚀、强胶结为特征。结合成岩环境、成岩作用、成岩矿物和地球化学等相关资料,推断塔河油田七区碳酸盐岩基质的成岩阶段处于晚成岩期;而溶洞充填物的成岩演化相对滞后,处于早成岩B期。可见,溶洞充填物在成岩演化中具有独特的成岩环境,明显不同于外围的碳酸盐岩基质。The ordovician carbonate reservoirs in Tahe Oilfield are subjected to a greater influence by diagenesis. This paper discusses a systematic study of the diagenetic characteristics of carbonate reservoir and cave fillings,based on casting thin sections and the outcrop observation,core logging,thermometry of fluid inclusions. The results show that the diagenesis of carbonate rocks are of varying types,characterized by strong compaction,strong dissolution and weak cementation,while the dominant diagenesis types of cave fillings are characterized by weak compaction,weak dissolution and strong cementation.The combination of the diagenetic environment,diagenesis,core logging,geochemical,and related information points to the inference that the diagenesis stage of ordovician carbonate rock in 7th zone of Tahe Oilfield is in late diagenesis stage,while the diagenesis stage of cave fillings is B period of early diagenesis,suggesting that the cave fillings has a unique diagenetic environment,significantly different from the carbonate reservoir.

关 键 词：塔河油田 缝洞型储层 成岩作用 碳酸盐岩 沉积充填物 

分 类 号：P618.13[天文地球—矿床学]