鄂尔多斯盆地长7段泥页岩层系含油气性与页岩油可动性评价——以H317井为例  

Oil-bearing potential, mobility evaluation and significance of shale oil in Chang 7 shale system in the Ordos Basin:A case study of well H317

作　　者：黄振凯 郝运轻[1,2] 李双建 沃玉进[1,2] 孙冬胜 黎茂稳[1,2] 陈建平 HUANG Zhenkai;HAO Yunqing;LI Shuangjian;WO Yujin;SUN Dongsheng;LI Maowen;CHEN Jianping(State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development,Beijing,100083,China;Petroleum Exploration and Production Research Institute,SINOPEC,Beijing 100083,China;Research Institute of Petroleum Exploration and Development,CNPC,Beijing,100081,China)

机构地区：[1]页岩油气富集机理与有效开发国家重点实验室,北京100083 [2]中国石化石油勘探开发研究院,北京100083 [3]中国石油勘探开发研究院,北京100081

出　　处：《中国地质》2020年第1期210-219,共10页Geology in China

基　　金：国家自然科学基金(41702137);中国科学院A类战略性先导科技专项(XDA14010406)联合资助~~

摘　　要：以鄂尔多斯盆地三叠系延长组长7段泥页岩层系为研究对象,基于大量实际地质样品统计,建立其生、排油模式,并认为长7段页岩油的可动门限(排烃门限)在70 mg/gTOC,并以此为基础建立了适用于鄂尔多斯盆地长7段泥页岩层系页岩油含油性和可动性评价模板。评价模板中将该区页岩油划分为有效资源、潜在资源和无效资源三大类。以H317井实际地质应用实例,使用评价模板对其不同岩性进行了系统分类。H317井长7段泥页岩层系中非源岩夹层段及部分块状泥岩等可作为页岩油勘探开发的有效资源和有利目标,黑色页岩虽然含油性较好,但流体组份偏重,流动性差,针对这类资源可采用原位加热改质后开采等工程技术手段,因此可作为页岩油勘探开发的潜在资源。Taking the Chang 7 shale system of Yanchang Formation in Ordos Basin as the research target and based on the statistics of a large number of geological samples, the authors established the oil generation and expulsion model. The movable threshold(hydrocarbon expulsion threshold) of the Chang 7 shale system was considered to be 70 mg/g TOC, and the evaluation template of shale oil in Chang 7 shale system was established, which included oil-bearing potential and mobility. In the evaluation template, the shale oil in this area was divided into three categories: effective resources, potential resources and ineffective resources. Based on the actual geological application examples of well H317, the different lithologies were systematically classified using the evaluation template. Sandstone, silty mudstone and some massive mudstone in the Chang 7 shale system of well H317 are probably the effective resources and favorable targets for shale oil exploration and development. Although the oil-bearing capacity of black shale is good, the composition is heavy and that will cause the fluidity to be not as good as the other kinds of lithologies mentioned previously. However, by using engineering techniques such as situ mining, it may become a potential target for shale oil exploration in this area.

关 键 词：页岩油 泥页岩层系 含油性 可动性 油气勘查工程 鄂尔多斯盆地 

分 类 号：P618.13[天文地球—矿床学]