安塞油田楼坪区长10致密储层成岩作用研究

1.中国石油大学(北京)克拉玛依校区 资源勘查工程学部,新疆 克拉玛依 834000; 2.中国石油吐哈油田分公司 勘探开发研究院,新疆 哈密 839009; 3.延长油田股份有限公司,陕西 延安 716005; 4.克拉玛依职业技术学院 石油工程系,新疆 克拉玛依 834000

长10储层; 成岩作用; 楼坪区

Diagenesis of Chang10 dense reservoir of Louping area in Ansai oilfield
TANG Jian-yun1,4,SONG Hong-xia2,ZHANG Xing1,4,CHEN Yu-bao 3

(1.Department of Resource Exploration Engineering, China University of Petroleum(Beijing)Karamay Campus,Karamay 834000,China; 2.The Institute of Exploration and Development,Tuha Oilfield Petro China,Hami 839009,China; 3.Yanchang Petroleum Co.,Ltd.Yan'an 716005,China; 4.Department of Petroleum Engineering,Karamay Vocational and Technical College,Karamay 834000,China)

Chang10 reservoir; diagenesis; Louping area

DOI: 10.13800/j.cnki.xakjdxxb.2016.0106

备注

综合应用铸体薄片、扫描电镜、X-衍射、恒速压汞等技术和储层综合评价方法,对安塞油田楼坪区长10致密储层成岩作用系统分析。结果 表明:长10储层岩性以灰色细粒长石砂岩和岩屑长石砂岩为主; 碎屑颗粒成分成熟度和结构成熟度都较低; 孔隙类型主要以粒间孔、长石溶孔和浊沸石溶孔为主; 喉道以细小孔-微细喉为主; 储层属于典型的低孔-(超)低渗致密储层; 长10储层主要成岩作用为压实-压溶作用、胶结作用以及溶蚀作用,其中压实作用、胶结作用属破坏性成岩作用,溶蚀作用属建设性成岩作用,长10储层砂岩目前处于中成岩A期; 依据研究区沉积特征及成岩作用,将楼坪区成岩相划分为5种类型,其中绿泥石胶结相、绿泥石胶结-长石、浊沸石溶蚀相是主要的有利成岩相带。

Integrated application of the casting thin sections,SEM,X-ray diffraction,mercury injection and the reservoir comprehensive evaluation method,the diagenesis and Impact on Chang10 sandstone reservoir of louping area in AnSai oilfield were analyzed.The results show that:The Chang10 reservoir is lithology in gray in-grained feldspar sandstone and lithic feldspar sandstone; Clastic particles component maturity and knot structural maturity are low; Pore types mainly intergranular pores,feldspar dissolved pore and laumonite dissolution pore; Throat with tiny Hole-micrfine throat is prior; Reservoir belongs to the typical low hole-(ultra)low permeability reservoir; The Chang10 reservoir main diagenetic reservoir is compaction,pressolution,cementation and dissolution,with the compaction and cementation is destructive,and dissolution is constructive,The Chang10 reservoir is in A-period of the diagenesis; On the basis of research and investigation on sedimentary characteristics and diagenesis,the diagenetic facies of Louping area is divided into five types,including chlorite cementation facies,green debris consolidation-feldspar,laumonite dissolution facieis the main favorable diagenetic facies belt.