玛湖凹陷玛页1井风城组页岩油地质甜点优选  

Optimization of Geological Sweet Spots for Shale Oil in Fengcheng Formation in Well Maye⁃1,Mahu Sag

作　　者：李娜[1] 李卉[1] 刘鸿 陈方文 杨森[1] 邹阳 LI Na;LI Hui;LIU Hong;CHEN Fangwen;YANG Sen;ZOU Yang(PetroChina Xinjiang Oilfield Company,Research Institute of Exploration and Development,PetroChina Xinjiang Oilfield Company,Data Company,Karamay,Xinjiang 834000,China;PetroChina Xinjiang Oilfield Company,Data Company,Karamay,Xinjiang 834000,China;School of Geosciences,China University of Petroleum,Qingdao,Shandong 266580,China)

机构地区：[1]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000 [2]中国石油新疆油田分公司数据公司,新疆克拉玛依834000 [3]中国石油大学(华东)地球科学与技术学院,山东青岛266580

出　　处：《新疆石油地质》2024年第3期271-278,共8页Xinjiang Petroleum Geology

基　　金：新疆维吾尔自治区“天山英才”科技创新领军人才支持项目(2022TSYCJ0070);中国石油前瞻性基础性技术攻关项目(2022DJ0108);山东省自然科学基金(ZR2022YQ30);中国石油攻关性应用性科技专项(2023ZZ15)。

摘　　要：玛湖凹陷风城组属于具有物源多、岩性复杂、整体含油、甜点分散等特征的混积型碱湖沉积,为了对页岩油进行高效勘探和开发,需要对页岩油地质甜点优选。以高压压汞、岩石热解等实验结果为基础,对玛页1井风城组储集层及其页岩油可动性等进行评价,构建页岩油地质甜点优选模型,评价页岩油地质甜点垂向分布特征。结果表明:孔隙度、总有机碳含量、脆性矿物含量和游离烃含量与100倍总有机碳含量之差分别是评价风城组储集层储集性能、含油性、脆性和页岩油可动性的参数;利用4个参数构建页岩油地质甜点优选模型,玛页1井风城组一类、二类和三类页岩油地质甜点的页岩油甜点因子分别为大于0.2823、0.0111~0.2823和小于0.0111;玛页1井风城组一类页岩油地质甜点主要分布在风二段上部和风三段,岩性以泥岩和白云质泥岩为主。The Fengcheng formation in the Mahu sag is a typical alkaline lacustrine deposit characterized by mixed provenance,complex lithology,overall oil possibility,and scattered sweet spots.To efficiently explore and develop the shale oil,it is necessary to optimize geological sweet spots for the shale oil.Based on the results of high‑pressure mercury injection and rock pyrolysis experiments,the reservoir and shale oil mobility of the Fengcheng formation in Well Maye‑1 were evaluated,a model for optimizing geological sweet spots for the shale oil was constructed,and the vertical distribution of geological sweet spots for the shale oil was assessed.The results show that porosity,total organic carbon content,brittle mineral content,and difference between free hydrocarbon content and 100 times of total organic carbon content are parameters for respectively evaluating the reservoir performance,oil‑bearing property,brittleness,and shale oil mobility of the Fengcheng formation.A model for optimizing geological sweet spots for the shale oil was constructed by using these four parameters,with sweet spot factors for ClassⅠ,Ⅱ,andⅢshale oil geological sweet spots in Well Maye‑1 being greater than 0.2823,ranging from 0.0111 to 0.2823,and less than 0.0111,respectively.ClassⅠshale oil geological sweet spots in the Fengcheng formation in Well Maye‑1 are mainly distributed in the upper part of the second member of Fengcheng formation and in the third member of Fengcheng formation,with lithology dominated by mudstone and dolomitic mudstone.

关 键 词：准噶尔盆地 玛湖凹陷 玛页1井 风城组 页岩油 地质甜点 高压压汞 

分 类 号：TE122[石油与天然气工程—油气勘探]