准噶尔盆地吉木萨尔凹陷昌吉页岩油成藏条件及勘探开发关键技术  

Accumulation conditions and key technologies for exploration and development of Changji shale oil in Jimusar sag of Junggar Basin

作　　者：吴宝成 吴承美[1] 谭强[1] 褚艳杰 梁成钢[1] 李文波 张金风 陈依伟 徐田录 王良哲 Wu Baocheng;Wu Chengmei;Tan Qiang;Chu Yanjie;Liang Chenggang;Li Wenbo;Zhang Jinfeng;Chen Yiwei;Xu Tianlu;Wang Liangzhe(Jiqing Oilfield Operation Area(Jimsar Shale Oil Project Management Department),PetroChina Xinjiang Oilfield Company,Xinjiang Jimsar 831700,Chin)

机构地区：[1]中国石油新疆油田公司吉庆油田作业区(吉木萨尔页岩油项目经理部),新疆吉木萨尔8317000

出　　处：《石油学报》2024年第2期437-460,共24页Acta Petrolei Sinica

基　　金：中国石油天然气股份公司科技重大专项“陆相中高成熟度页岩油勘探开发关键技术研究与应用”(2019E-26)和“吉木萨尔页岩油国家级示范区水平井效益开发关键工程技术集成与试验”[2020F-50(GF)]资助

摘　　要：准噶尔盆地吉木萨尔凹陷芦草沟组自发现页岩油以来,历经十年的勘探开发,提交三级储量4.3×10^(8)t,并于2020年成为国家级陆相页岩油开发示范区,在2023年产油量突破60×10^(4)t。吉木萨尔凹陷页岩油在成藏地质理论、配套勘探开发技术、效益管理等方面取得了一系列理论创新和技术突破。研究结果表明:吉木萨尔凹陷为稳定构造背景下的广阔湖盆,沉积了多组分、高有机质富集的混积岩,厚度达275 m;源-储的薄互层一体式分布为页岩油的富集与保存起了重要作用;高源-储比(4.5∶1)、高有机质丰度(3.24%)、咸化湖沉积环境提高了凹陷内原油的成熟度(镜质体反射率Ro达1.05%);凹陷内普遍发育超压(压力系数平均为1.36),源-储压力差提高了充注效率和石油富集程度,形成了高含油饱和度、高压力系数的油藏。吉木萨尔凹陷页岩油目前的配套勘探开发技术基本成熟定型:宽频激发、井地联采的精细三维地震提高了地质认识;页岩油"甜点"精细表征和分类评价为开发部署提供了依据;"黄金靶体"钻遇率是水平井获得高产、稳产的基础;"复杂缝网"定制是高效开发页岩油的有效手段;合理排采制度有利于充分发挥水平井的生产能力;市场化降本是推进吉木萨尔凹陷页岩油效益开发的关键。吉木萨尔凹陷页岩油的技术、管理、效益都走在中国页岩油开发的前列,为中国陆相页岩油的高效勘探开发提供了借鉴与示范。Since the discovery of Lucaogou Formation shale oil in Jimusar sag of Junggar Basin,it has third-level reserves of 4.3×10^(8)t through ten years of exploration and development.In 2020,Jimusar sag became a national development demonstration zone of continental shale oil with an oil production of 60×10^(4)t.A series of theoretical innovation and technological breakthroughs have been achieved in terms of geological theory of shale oil accumulation in Jimusar sag,supporting exploration and development technologies,and benefits management.The research results show as follows.Jimusar sag is a vast lake basin under the stable tectonic setting,where multi-component peperite with rich organic matters has been deposited,with the thickness of 275 m.The integrated distribution of thin source-reservoir interbeds plays an important role in the enrichment and preservation of shale oil.Due to high source-reservoir ratio(4.5:1),high organic matter abundance(3.24%)and sedimentary environment of saline lake,the maturity of crude oil in the sag has been improved,and the vitrinite reflectance Ro is up to 1.05%.Overpressure commonly exists in tsag with an average pressure coefficient of 1.36.The charging efficiency and oil enrichment degree are enhanced as a result of the source-reservoir pressure difference,indicating the formation of reservoirs with high oil saturation and high pressure coefficient.The current exploration and development technologies of shale oil in Jimusar sag are basically established.The geological understanding has been improved by the fine three-dimensional seismic technique of broadband excitation and combination of logging and seismic acquisition.The fine characterization of shale oil"sweet spots"and classified evaluation provide the bases for hydrocarbon development and deployment.The drilling ratio for"gold targets"can provide a basis for high and stable production of horizontal wells.The complex fracture networks are effective means for the efficient development of shale oil.The reasonable drainage and p

关 键 词：准噶尔盆地 吉木萨尔凹陷 页岩油 成藏地质条件 勘探开发配套技术 

分 类 号：TE122[石油与天然气工程—油气勘探]