碎屑岩潜山储层埋藏-抬升-再埋藏的成岩响应:以济阳坳陷孤北潜山二叠系上石盒子组为例  

Diagenetic Response of Clastic Buried Hill Buried-Uplifted-Reburied:A Case Study from Upper Shihezi Formation in Permian of Gubei Buried Hill of Jiyang Depression

作　　者：王晔磊 邱隆伟 刘卫红[3] 杨勇强 滕宝刚 吴宛秋 Wang Yelei;Qiu Longwei;Liu Weihong;Yang Yongqiang;Teng Baogang;Wu Wanqiu(School of Geosciences,China University of Petroleum,Qingdao 266580,China;Key Laboratory of Deep Oil and Gas,China University of Petroleum,Qingdao 266580,China;PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China;Zhuangxi Oil Production Plant,Shengli Oilfield,SINOPEC,Dongying 257000,China)

机构地区：[1]中国石油大学地球科学与技术学院,山东青岛266580 [2]中国石油大学深层油气重点实验室,山东青岛266580 [3]中国石油勘探开发研究院,北京100083 [4]中国石化胜利油田桩西采油厂,山东东营257000

出　　处：《地球科学》2023年第4期1481-1495,共15页Earth Science

基　　金：国家自然科学基金项目(No.41972099);国家科技重大专项(Nos.2017ZX05009⁃002,2017ZX05072⁃002);中国石油天然气股份有限公司前瞻性基础性战略性技术攻关项目“含油气盆地铀矿勘查评价与高效开采技术研究”(No.2021DJ5303).

摘　　要：为深化对碎屑岩潜山储层的认识,以济阳坳陷孤北潜山二叠系上石盒子组砂岩储层为例,利用岩心观察、薄片鉴定、扫描电镜、阴极发光、碳氧同位素分析和流体包裹体等技术,结合潜山成山过程、埋藏演化史和构造演化史,对储层的埋藏-抬升-再埋藏过程中的成岩响应进行研究.研究发现,济阳坳陷孤北潜山二叠系上石盒子组砂岩储层成岩演化从早到晚经历了三个阶段:阶段Ⅰ:晚三叠世与早、中侏罗世,受印支运动影响,孤北潜山抬升二叠纪地层遭受剥蚀,以地层浅埋藏和抬升暴露剥蚀为主要成岩环境,以长石溶蚀、高岭石胶结、①期石英胶结以及褐铁矿侵染发育为主要成岩响应.阶段Ⅱ:晚侏罗世与白垩纪,郯庐断裂带发生左旋走滑运动,强烈的构造活动伴随活跃的火山活动,与火山活动相伴生热液活动对储层改造巨大,以发育①期碳酸盐胶结、②期石英胶结、黄铁矿、绢云母、绿泥石、长柱状磷灰石为成岩响应.阶段Ⅲ:新生代,在区域扭张应力的作用下,孤北潜山埋深增大,有机质成熟度升高,以有机酸主导的酸性成岩环境为主,以②期碳酸盐胶结、石英溶蚀过渡到碳酸盐溶蚀、晚期长石溶蚀为主要成岩响应.孔隙演化定量恢复结果显示,阶段Ⅰ和Ⅱ压实作用与胶结作用对孔隙度的影响较大,孔隙度从40%降至19%;阶段Ⅲ早期碱性环境下成岩作用对储层产生破坏性作用,使储层孔隙度从19%降至6.7%;之后酸性环境下溶蚀改造使储层孔隙度从6.7%升高到9.1%;次生溶蚀孔隙发育且保存较好.In this paper it aims to gain new insights into clastic buried hill reservoirs.For this purpose,the Permian sandstone reservoirs in Upper Shihezi Formation,Gubei low buried hill,Jiyang depression,was taken as the object.Referring to the diagenesis in the process of burial-lifting-reburning of the reservoirs,with the aid of techniques like core observation,casting sheet observation,scanning electron microscopy(SEM),cathode luminescence,carbon-oxygen isotope analysis and fluid inclusion.The results show that:It is found that the diagenetic evolution of the sandstone reservoir of Upper Shihezi Formation of Permian in Gubei buried hill of Jiyang Depression has gone through three stages from early to late.Stage I:Late Triassic and Early-Middle Jurassic,Gubei buried hill was uplifted and the Permian strata were denuded by the Indosinian movement,and the main diagenetic environment was shallow burial and uplift exposure denudation.The main diagenetic responses are feldspar dissolution,kaolinite cementation,stage①quartz cementation and limonite invasion.Stage II:Jurassic and Cretaceous,the sinistral strike-slip movement occurred in the Tancheng-Lujiang fault zone,the strong tectonic activity accompanied by active volcanic activity,and the hydrothermal activity associated with volcanic activity greatly affected the reservoir.The diagenetic response is the development of stage①carbonate cementation,stage②quartz cementation,pyrite,sericite,chlorite and long columnar apatite.StageⅢ:Cenozoic,under the action of regional transtensional stress,the burial depth of Gubei buried hill increased,the maturity of organic matter increased,and the diagenetic environment was dominated by organic acid.The diagenetic response was mainly from carbonate cementation and quartz dissolution in stage②to carbonate dissolution and feldspar dissolution in late stage.The results of quantitative restoration of pore evolution show that the compaction and cementation in stagesⅠandⅡhave a great influence on the porosity,which decreases fro

关 键 词：成岩作用 构造演化 埋藏史 上石盒子组 孤北潜山 油气地质 

分 类 号：P618.13[天文地球—矿床学]