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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

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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0.282 3、0.011 1～0.282 3和小于0.011 1;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 li-thology,overall oil possibility,and scattered sweet spots.To efficiently explore and develop the shale oil,it is necessary to optimize geologi-cal 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 or-ganic carbon content,brittle mineral content,and difference between free hydrocarbon content and 100 times of total organic carbon con-tent 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 Class Ⅰ,Ⅱ,and Ⅲ shale oil geological sweet spots in Well Maye-1 being greater than 0.282 3,ranging from 0.011 1 to 0.282 3,and less than 0.011 1,respectively.Class Ⅰ shale 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 li-thology dominated by mudstone and dolomitic mudstone.

Junggar basinMahu sagWell Maye-1Fengcheng formationshale oilgeological sweet spothigh-pressure mercury injection

李娜、李卉、刘鸿、陈方文、杨森、邹阳

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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

中国石油 新疆油田分公司 数据公司,新疆 克拉玛依 834000

中国石油大学(华东)地球科学与技术学院,山东 青岛 266580

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

新疆维吾尔自治区"天山英才"科技创新领军人才支持项目中国石油前瞻性基础性技术攻关项目山东省自然科学基金中国石油攻关性应用性科技专项

2022TSYCJ00702022DJ0108ZR2022YQ302023ZZ15

2024

10.7657/XJPG20240303

新疆石油地质
新疆石油学会

新疆石油地质

CSTPCD北大核心
影响因子：0.985
ISSN：1001-3873
年,卷(期)：2024.45(3)
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