定边地区侏罗系延安组延9储层成岩作用特征

1.克拉玛依职业技术学院 石油工程系,新疆 克拉玛依 834000; 2.中国石油大学(北京)克拉玛依校区 石油学院, 新疆 克拉玛依 834000; 3.西安石油大学 地球科学与工程学院,陕西 西安 710065; 4.中国石油吐哈油田分公司 勘探开发研究院,新疆 哈密 839009; 5.中国石油化工股份有限公司石油勘探开发研究院 无锡石油地质研究所, 江苏 无锡 214126; 6.延长油田股份有限公司,陕西 延安716005

成岩作用; 储层物性; 延9; 定边地区; 鄂尔多斯盆地

Diagenesis of Yan 9 reservoir of Yan'an Formation of the Jurassic in Dingbian area
TANG Jian-yun1,2,GUO Yan-qin3,SONG Hong-xia4,ZHANG Xing2,SHI Zheng5,CHEN Yu-bao 6

(1.Department of Petroleum Engineering,Karamay Vocational and Technical College,Karamay 834000,China; 2.Petroleum Institute,China University of Petroleum(Beijing)Karamay Campus,Karamay 834000,China; 3.School of Earth Sciences and Engineering,Xi'an Shiyou University,Xi'an 710065,China; 4.Institute of Exploration and Development,PetroChina Tuha Oilfield,Hami 839009,China; 5.Wuxi Institute of Petroleum Geology,SINIPEC,Wuxi 214126,China; 6.Yanchang Petroleum Co.,Ltd.,Yan'an 716005,China)

diagenesis; reservoir physical property; Yan 9; Dingbian area; Ordos Basin

DOI: 10.13800/j.cnki.xakjdxxb.2017.0615

备注

通过岩石薄片、铸体薄片、物性、高压压汞、阴极发光、扫描电镜及X射线衍射等测试手段,对定边地区延9砂岩储层成岩作用进行研究。结果 表明,研究区延9储层经历了压实作用、胶结作用及溶蚀作用,压实作用、伊利石胶结及碳酸盐胶结破坏原生孔隙,使储层物性变差; 高岭石对储层物性的影响具有双重性; 溶蚀作用产生较多的次生孔隙,有利于改善储层物性。依据粘土矿物组合及自生矿物分布,认为研究区延9砂岩成岩演化阶段进入了中成岩阶段A期。研究为储层综合评价及有利区优选提供了地质依据。

The physical properties,high pressure mercury,cast section,Cathode luminescence,SEM and X-ray analysis samples are introduced in this experiment to study the diagenesis of Yan 9 reservoir.The results show that the Yan 9 reservoir experienced compaction,cementation and dissolution,compaction,the cementation of illite and carbonate cementation destroying the primary pore,which make reservoir properties worse; the effect of kaolinite on physical property of reservoir is a dual; dissolution produces more secondary porosity that will help to improve reservoir property.Based on a combination of clay minerals and authigenic mineral distribution,we can draw a conclusion that the Yan 9 sandstone diagenetic evolution stage is in A period of the middle diagenetic stage.This study provides geological basis for the comprehensive evaluation and optimization of favorable reservoir.