摘要
鄂尔多斯盆地中生界三叠系延长组长7段发育丰富的非常规石油资源,目前对于其属于致密油还是页岩油尚存在争议。结合国内外现状及其地质特征,文章将其统称为页岩油,即鄂尔多斯盆地延长组长7段页岩油指长7段烃源岩层系内致密砂岩和泥页岩中未经过长距离运移而形成的石油聚集,并根据岩性组合等因素将其分为多期叠置砂岩发育型(Ⅰ类)、页岩夹薄层砂岩型(Ⅱ类)和纯页岩型(Ⅲ类)共3种类型。综合地质研究认为,长7段页岩油具有砂泥储层大面积分布、储层致密但流体可动性较好、含油饱和度高、油质轻、气油比较高、埋藏较浅、资源量大等特点。近年来通过地震、测井、工程及开发技术攻关,推动长7段页岩油勘探开发取得良好成效:落实了I类页岩油整装规模储量区,建成3个Ⅰ类页岩油水平井攻关试验区;Ⅱ、Ⅲ类页岩油直井勘探突破出油关;Ⅰ类页岩油规模开发成效显著,长7段页岩油已成为长庆油田“二次加快”发展的重要资源保障。
Rich unconventional petroleum resources are developed in the Chang 7 Member of the Mesozoic Triassic Yanchang Formation in the Ordos Basin.At present,there are still disputes on whether it is tight oil or shale oil.According to the current situation at home and abroad,and its geological characteristics,we call it shale oil in this paper,i.e.the Chang 7 Member of Yanchang Formation in the Ordos Basin shale oil refers to the oil accumulation in tight sandstone and shale in the Chang 7 Member source rocks,which was formed without a long-distance migration.Depending on lithologic association and other factors,the shale oil reservoirs are classified into 3 types as multiphase sand overlay type(typeⅠ),shale interbedded with thin sandstone type(typeⅡ)and pure shale(typeⅢ).According to the comprehensive geological study,Chang 7 shale oil is characterized by the following:sand-mud reservoir with large area distribution,dense reservoir with good fluidity,high oil saturation,light oil,high gas-oil ratio,shallow burial,and large quantity of resources,etc.In recent years,through seismic survey,well logging,research on engineering and development technologies,achievements on exploration and development of shale oil in Chang 7 Member are achieved,such as:defined the scale reservoir area of type I shale oil,and 3 pilot areas for horizontal well development of typeⅠshale oil were constructed;for typeⅡand type Ⅲ shale oil,production of oil was achieved through vertical well exploration;the scale development of typeⅠshale oil has achieved remarkable results,and shale oil of Chang 7 Member has become an important resource guarantee for the"second acceleration"development of Changqing oilfield.
作者
付金华
牛小兵
淡卫东
冯胜斌
梁晓伟
辛红刚
尤源
Fu Jinhua;Niu Xiaobing;Dan Weidong;Feng Shengbin;Liang Xiaowei;Xin Honggang;You Yuan(PetroChina Changqing Oilfield Company;National Engineering Laboratory of Exploration and Development of Low-Permeability Oil and Gas Fields;Research Institute of Petroleum Exploration and Development,PetroChina Changqing Oilfield Company)
出处
《中国石油勘探》
CAS
CSCD
北大核心
2019年第5期601-614,共14页
China Petroleum Exploration
基金
国家科技重大专项“大型油气田及煤层气开发”课题“鄂尔多斯盆地致密油资源潜力、甜点预测与关键技术应用”（2016ZX05046-005）
国家自然科学基金项目“非常规油气勘探与开发地球物理基础理论与方法研究”课题“中国非常规油气储层分类与典型地质模型建立”（41390451）
关键词
页岩油
鄂尔多斯盆地
中生界
长7段
勘探开发进展
shale oil
Ordos Basin
Mesozoic
Chang 7 Member
progress on exploration and development
作者简介
第一作者:付金华(1963-),男,湖北黄冈人,博士,2004年毕业于西北大学,教授级高级工程师,现从事油气勘探开发管理工作。地址:陕西省西安市未央区未央路151号长庆油田公司,邮政编码:710018。E-mail:fjh-cq@petrochina.com.cn;通信作者:淡卫东(1977-),男,陕西户县人,博士,2008年毕业于中国地质大学(武汉),高级工程师,现从事油气地质勘探综合研究和油藏评价工作。地址:陕西省西安市未央区未央路151号长庆油田公司勘探开发研究院,邮政编码:710018。E-mail:dwd_cq@petrochina.com.cn。
