沧东凹陷孔二段致密油储集层录井解释评价方法  

Mud logging interpretation and evaluation method for tight oil reservoirs in the second member of Kongdian formation,Cangdong sag

作　　者：董越崎[1] 孙凤兰 马红 解文[3] 马青春 孙自检 

机构地区：[1]中国石油大学(北京)地球科学学院 [2]中国石油渤海钻探工程有限公司第一录井公司 [3]中国石油大港油田公司

出　　处：《录井工程》2015年第3期63-69,107,共7页Mud Logging Engineering

摘　　要：沧东凹陷孔二段致密油气藏储集层岩性复杂多变、非均质性强,总体分为砂岩和非砂岩两大类,其中非砂岩类以过渡岩类占主导,岩性混杂,储集层识别与评价困难。为了实现该凹陷孔二段两类储集层的有效解释评价,在评价孔二段烃源岩有机质丰度高、有机质类型好、已进入低熟—成熟早期阶段的基础上,分析了致密砂岩类和过渡岩类储集层的基本岩性组成,依据两类储集层在气测、定量荧光和岩石热解录井上的具体特征,分别建立了气测湿度比与峰基比、定量荧光油性指数与对比级别、岩石热解油产率指数与总烃的储集层解释评价图板,并形成了沧东凹陷孔二段致密油储集层录井综合解释评价标准。实践应用表明该方法的解释评价总体符合率达到79.6%,效果较好。The lithology of tight oil reservoirs in the second member of Kongdian formation,Cangdong sag is complex and very changeable with strong heterogeneity,which can be generally divided into two major types of sandstone and non-sandstone,among them,the nonsandstone is dominated by transitional rock with complex lithology and reservoir identification and evaluation are difficult.In order to realize the effective interpretation and evaluation of two types of reservoirs in the sag,on the basis of evaluating source rock with high organic matter abundance,better organic matter type which have made the reservoirs enter the early stage of immature and mature,the authors analyzed the basic lithologic composition of reservoirs for the compacted sandstone and transitional rock,in accordance with the specific characteristics of two types of reservoirs on gas logging,quantitative fluorescence and rock pyrolysis logging,respectively established the reservoir interpretation and evaluation charts between gas logging humidity ratio and peak-base ratio,quantitative fluorescence oiliness index and contrast level,rock pyrolysis oil production rate index and total hydrocarbon reservoir,and formed mud logging comprehensive interpretation and evaluation criteria for tight oil reservoirs in the second member of Kongdian formation,Cangdong sag.The practice application showed that the overall coincidence rate of the interpretation and evaluation for this method reached 79.6%,the effect is good.

关 键 词：沧东凹陷 孔二段 烃源岩 储集层 致密砂岩 过渡岩类 解释评价 

分 类 号：TE132.1[石油与天然气工程—油气勘探]