摘要
鄂尔多斯盆地西缘下古生界奥陶系蕴藏着丰富的天然气资源,通过试气结果表明,乌拉力克组的泥页岩和灰岩层段均有较好的油气显示。因此,对乌拉力克组的储层特征及控制因素的研究对该层位天然气勘探具有重要意义。本文在对乌拉力克组泥页岩和灰岩的储集空间类型和物性特征研究的基础之上,进一步对储层控制因素进行研究,并建立乌拉力克组油气成藏模式图。研究结果表明,乌拉力克组的储集空间类型主要发育裂缝、孔隙、溶洞等。泥页岩孔隙度范围为1.2%~2.8%,平均1.82%,渗透率范围为(0.01~0.1)×10^(-3)μm^(2),平均0.07×10^(-3)μm^(2);灰岩孔隙度范围为1%~3%之间,平均1.8%;渗透率范围为(0.01~0.03)×10^(-3)μm^(2),平均0.01×10^(-3)μm^(2)。乌拉力克组物性特征以低孔隙度和低渗透率为主;储层的控制因素主要有构造作用、成岩作用、岩相古地理控制作用。
The Lower Paleozoic Ordovician in the western margin of the Ordos Basin is rich in natural gas resources.The gas testing results show that the shale and limestone sections of the Wulalike Formation have good oil and gas indications.Therefore,the study of the reservoir characteristics and control factors of the Wulalike Formation is of great significance for the natural gas exploration in this layer.Based on the study of the reservoir space types and physical properties of the shale and limestone of the Wulalike Formation,this paper further studies the reservoir control factors and establishes the oil and gas accumulation model map of the Wulalike Formation.The research results show that the reservoir space types of the Ullak Formation mainly develop fractures,pores,karst caves,etc.The shale porosity ranges from 1.2%to 2.8%,with an average of 1.82%,and the permeability ranges from 0.01 to 0.1×10^(-3)μm^(2),average 0.07×10^(-3)μm^(2).The porosity of limestone ranges from 1%to 3%,with an average of 1.8%.Permeability range is(0.01~0.03)×10^(-3)μm^(2),average 0.01×10^(-3)μm^(2).The physical properties of the Wulalike Formation are characterized by low porosity and low permeability.The main controlling factors of the reservoir are tectonism,diagenesis and lithofacies and paleogeography.
作者
孙华丽
高建荣
张涛
王超
蒋婷婷
刘鹏飞
鲁莎
陈朝兵
SUN Hua-li;GAO Jian-rong;ZHANG Tao;WANG Chao;JIANG Ting-ting;LIU Peng-fei;LU Sha;CHEN Zhao-bing(Xi′an Shiyou University,Xi′an 710065,China;Shaanxi Key Laboratory of Petroleum Accumulation Geology,Xi′an 710065,China;Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China;No.2 Gas Production Plant,PetroChina ChangQing Oilfield Company,Xi′an 710200,China)
出处
《河北地质大学学报》
2023年第3期48-54,共7页
Journal of Hebei Geo University
基金
国家自然科学基金(41802140)
国家科技重大专项(2016ZX05050006)
陕西省自然科学研究基础计划项目(2019JQ-257)
刘宝珺地学科学基金(DMSM2019007)。
关键词
储层特征
控制因素
乌拉力克组
奥陶系
鄂尔多斯盆地
reservoir characteristics
control factors
Wulalike Formation
Ordovician
Ordos Basin
作者简介
孙华丽(1996-),女,四川达州人,硕士研究生,研究方向为沉积与储层地质。E-mail:360441970@qq.com;通讯作者:陈朝兵(1984-),男,陕西安康人,副教授,研究方向为沉积学与石油地质。E-mail:zbchen@xsyu.edu.cn。
