东营凹陷页岩油双甜点录井解释评价方法研究  

Study on mud logging interpretation and evaluation method of geological and engineering sweet spots for shale oil in Dongying Sag

作　　者：杜焕福 孙鑫 王春伟[1] 董佑桓 侯文辉 刘长亮 DU Huanfu;SUN Xin;WANG Chunwei;DONG Youhuan;HOU Wenhui;LIU Changliang(Geosteering&Logging Research Institute,Sinopec Matrix Co.,LTD.,Qingdao 266000,Shandong,China;School of Petroleum Engineering,China University of Petroleum(East China),Qingdao 266580,Shandong,China;Sinopec Matrix Co.,LTD.,Qingdao 266000,Shandong,China)

机构地区：[1]中石化经纬有限公司地质测控技术研究院,山东青岛266000 [2]中国石油大学(华东)石油工程学院,山东青岛266580 [3]中石化经纬有限公司,山东青岛266000

出　　处：《矿产勘查》2023年第3期480-490,共11页Mineral Exploration

基　　金：国家重点研发计划项目(2019YFA0708700);中石化经纬有限公司博士后研究项目(JWBH2203)联合资助。

摘　　要：页岩油双甜点评价是衡量页岩油是否具有开采价值的有效方法。基于录井的岩屑、岩心实物观察,气测录井、岩石薄片、岩石热解、碳同位素、核磁共振、QemSCAN、显微荧光薄片、XRF、XRD及试油资料,研究确定了东营凹陷沙三下亚段、沙四上纯上亚段两套页岩油类型和岩相类型。源岩沉积厚度大,有机质丰度较高,处于成熟演化阶段;储集空间主要为孔隙和微裂缝,含油气丰度高、地层压力系数高、流体可流动性好。从裂缝发育程度、脆性矿物的含量等方面评价了页岩油工程甜点。优选了气测全烃、TOC、孔隙度、碳同位素分馏程度、地化S1、脆性矿物指数等录井特征参数,实现了录井地质甜点和工程甜点的定性及定量“四性”评价,建立了东营凹陷页岩油双甜点录井解释评价方法。该方法对东营凹陷页岩油双甜点录井解释评价具有一定的指导意义。The evaluation of shale oil double sweet spots is an effective method to measure whether shale oil is valuable for development.Two sets of shale oil and lithofacies types of upper Es_(4)~lower Es_(3) in Dongying Sag were identified based on cuttings of mud logging,core sample observation,gas logging,rock slice,rock-eval pyrolysis,carbon isotopic,nuclear magnetic resonance,QemSCAN,fluorescent microscopic assay,XRF,XRD and well test data.It is found that the source rock of the target formation is in mature evolution stage,with large sedimentary thickness and high organic matter abundance.The reservoir space mainly consists of pores and micro-fractures,with high hydrocarbon abundance,high formation pressure coefficient and good fluid mobility.The engineering sweet spot of shale oil was evaluated from fracture development degree and brittle mineral content.The qualitative and quantitative evaluation of geological and engineering sweet spots were carried out by optimization of mud logging characteristic parameters including total hydrocarbon with gas logging,TOC,porosity,degree of carbon isotope fractionation,S1 and brittle mineral index.Finally,the mud logging interpretation and evaluation method of“geological and engineering sweet spots”for shale oil in Dongying Sag was established,which is of guiding significance to the interpretation and evaluation of geological and engineering sweet spots for shale oil in Dongying Sag.

关 键 词：页岩油 地质甜点 工程甜点 录井特征参数 录井解释评价 

分 类 号：P618.13[天文地球—矿床学]