摘要
页岩油目前已成为国内外油气勘探开发的重要领域,为了探索碳同位素录井新技术在页岩油评价中的作用,选取渤南洼陷页岩油井YYP 1井开展碳同位素录井工作。基于系统的碳同位素录井数据,详细分析了沿井身轨迹的碳同位素变化特征及其代表的地质意义,利用钻井液气碳同位素研究了页岩油气的成因及成熟度等油气地球化学问题,通过不同时间序列下岩屑罐顶气碳同位素分馏变化特征,及与钻井液气碳同位素之间的分馏特征,结合气测变化对页岩油“甜点”类型进行评价,为压裂分段分簇方案的制定提供有力的技术支撑。
Shale oil has become an important field of oil and gas exploitation at home and abroad.In order to explore the role of new carbon isotope logging technology in shale oil evaluation,this paper selects YYP 1 well,a shale oil well in Bonan Sag,to carry out carbon isotope logging work.Based on the systematic carbon isotope logging data,the variation characteristics of carbon isotopes along the wellbore trajectory and their geological significance are analyzed in detail,and the carbon isotopes of drilling fluid gas are used to study geochemistry like the genesis and maturity of shale oil and gas.According to the fractionation characteristics of carbon isotopes of cuttings head space gas and drilling fluid gas under different time series,and combined with gas logging changes,the"sweet spot"types of shale oil are identified,which provides a strong technical support for the formulation of fracturing segmentation and clustering scheme.
作者
牛强
慈兴华
NIU Qiang;CI Xinghua(Shengli Geological Mud Logging Company of Sinopic Matrix Co.,Ltd.,Dongying,Shandong 257000,China;Sinopic Matrix Corporation,Ltd.,Qingdao,Shandong 266001,China)
出处
《录井工程》
2023年第2期9-14,共6页
Mud Logging Engineering
关键词
渤南洼陷
页岩油
碳同位素录井
甜点识别
沙三下亚段
钻井液气
岩屑罐顶气
Bonan Sag
shale oil
carbon isotope logging
sweet spot identification
the lower section of Es 3
drilling fluid gas
cuttings head space gas
