塘沽油田湖相泥质白云岩含油气影响因素分析与实践

发布时间：2018-04-28 05:11

本文选题：湖相白云岩 + 非常规储层　；参考：《地质论评》2017年01期

【摘要】：湖相白云岩在我国东部泌阳凹陷古近系核桃园组、酒西坳陷白垩统下沟组和西部古—中生界准噶尔盆地二叠系风城组均已形成工业化油气开发,预示国内该类储层良好评价前景。塘沽油田在始新统—渐新统沙河街组三段五亚段湖相泥质白云岩储层取得油气勘探新发现,储层由泥质白云岩与白云质泥岩呈纹层不等厚交互构成,室内分析化验证实为弱还原半深水湖相沉积,具有裂缝与基质双重孔隙介质的特点,微介孔率在50%以上,为新型纳米级非常规碳酸盐储层。以该类油藏岩芯观察及试油试采资料为基础,借助于薄片鉴定、x射线衍射分析、扫描电镜分析、物性分析、压汞分析及氮气低温吸附测试等技术手段,对该类特殊岩性油藏的含油气影响因素进行探讨。研究结果表明塘沽油田沙河街组三段五亚段泥质白云岩含油性影响因素与成岩矿物组分及发育,储集空问及类型,微裂缝发育,异常超压空间展布等密切相关,所总结的湖相泥质白云岩储层含油气性综合评价方法对我国该类非常规油藏开发具有重要意义。
[Abstract]:The lacustrine dolomite has formed industrialized oil and gas development in the HuiTaoyuan formation of Paleogene, Xiagou formation of Cretaceous in Jiuxi depression and Fengcheng formation of Permian system in Paleozoic and Mesozoic Junggar basin in eastern China. Good evaluation prospect of this kind of reservoirs in China is predicted. Oil and gas exploration was made in the lacustrine shale dolomite reservoir of the third member of the Eocene Oligocene Shahejie formation in Tanggu Oilfield. Laboratory analysis proved that it is a weakly reduced semi-deep water lacustrine deposit with the characteristics of fracture and matrix dual porosity medium. The micromesoporous ratio is over 50%. It is a new type of nanometer unconventional carbonate reservoir. On the basis of core observation and production test data of this kind of reservoir, X ray diffraction analysis, scanning electron microscope analysis, physical property analysis, mercury injection analysis and nitrogen low temperature adsorption test are used in this field by means of thin slice identification, X-ray diffraction analysis, SEM analysis, physical property analysis, mercury injection analysis and nitrogen adsorption test at low temperature. The influencing factors of oil and gas in this kind of special lithologic reservoirs are discussed. The results show that the oil-bearing factors of argillaceous dolomite of the third member of Shahejie formation in Tanggu Oilfield are closely related to the composition and development of diagenetic minerals, the types of reservoir space, the development of micro-fractures, the distribution of abnormal overpressure space, etc. The comprehensive evaluation method of oil and gas content of lacustrine muddy dolomite reservoir is of great significance to the development of this kind of unconventional reservoir in China.
【作者单位】：中石化华东油气分公司泰州采油厂;中国石油大港油田分公司第四采油厂地质研究所;
【基金】：中国石油科技重大专项”渤海湾盆地精细勘探技术与滩海地区大油气田分布规律——歧口富油气凹陷大油气田勘探及综合配套技术研究”(编号:2008E-0600)的成果
【分类号】：P618.13

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