山东枣庄—滕州地区石炭二叠系页岩气成藏过程及主控因素
发布时间：2018-12-18 03:35
【摘要】：论文以山东省枣庄-滕州地区石炭二叠系地层为研究对象,通过收集整理区区基础地质资料,采用多种手段测试,全面分析研究区页岩储层的储层特征,认识页岩气成藏过程并探讨其地质控制因素,最后进行页岩气勘探开发潜在有利区预测,所取得的主要成果如下。在资料整理和室内实验分析的基础上,划定太原组目的层段,总结研究区页岩储层发育规律。研究区太原目的层段平均厚度为52.72 m,横向上向南东逐渐变薄趋势,空间形态主要受到构造的控制。有机质类型以III型干酪根为主,页岩有机组分平均含量为4.35%,有机质含量较高。成熟度北部较低,南部、东部较高。煤岩和泥岩的平均孔隙度为4.68%。孔隙类型以微小孔和过渡孔发育为主。泥岩渗透性较差,储层渗透率受充填影响很大。泥岩含气量0.76~0.92 m3/t,页岩总含气量与埋深关系不明显。采用综合分析和数值模拟方法,研究了本区页岩气成藏地质过程。石炭二叠系从开始沉积,连续沉降至最大埋深,古地温达到100℃以上,早期以生物气为主,后期则为热成因气,气体缓慢聚集。之后表现为整体进入抬升剥蚀,埋深达到最浅,早期生成的气体基本逸散。晚侏罗世处于快速下降沉积,地温出现差异性变化,北部地温正常,南部受区域岩浆热变作用影响,温度持续升高;滕北地区热演化基本停止,而南部地区快速演化,生成了一定数量的热成因气。从早白垩世至今,区域性缓慢抬升,地温下降,有机质成熟作用停止,前期聚集的气体逐渐散失至今。页岩气成藏地质控制因素,主要包括物质基础(有机地球化学特征和物性等)、构造运动、岩浆活动及水文地质条件等。古地理条件为本区准备了较为理想的烃源物质条件和储层条件。构造作用带来的不利是多方面的,包括有机质的成熟作用不足,页岩储层赋存构造环境以及页岩气保存环境不理想。最后,建立页岩气选区评价标准,优选出滕东地区为潜在页岩气勘探开发潜在有利区。
[Abstract]:Taking the Carboniferous Permian strata in Zaozhuang-Tengzhou area of Shandong Province as the research object, the paper analyzes the reservoir characteristics of shale reservoir in the study area by collecting and sorting out the basic geological data of the area and using various means of testing. The process of shale gas reservoir formation and its geological control factors are discussed. Finally, the potential favorable areas for shale gas exploration and development are predicted. The main results obtained are as follows. On the basis of data collation and laboratory experimental analysis, the target interval of Taiyuan formation is delineated, and the development law of shale reservoir in the study area is summarized. The average thickness of the Taiyuan target layer is 52.72 m, and the horizontal trend is gradually thinning south to east, and the spatial morphology is mainly controlled by the structure. The type of organic matter is mainly III kerogen, the average content of organic component of shale is 4.35%, and the content of organic matter is high. The maturity is lower in the north, higher in the south and higher in the east. The average porosity of coal and mudstone is 4.68%. The pore types are mainly micropore and transition pore. Mudstone permeability is poor, reservoir permeability is greatly affected by filling. The shale gas content is 0.76 ~ 0.92 m ~ (3 / t), and the relationship between shale gas content and buried depth is not obvious. The geological process of shale gas reservoir formation in this area is studied by means of comprehensive analysis and numerical simulation. From the beginning of the Carboniferous Permian system to the maximum buried depth, the paleogeothermal temperature was over 100 鈩，
本文编号：2385267
[Abstract]:Taking the Carboniferous Permian strata in Zaozhuang-Tengzhou area of Shandong Province as the research object, the paper analyzes the reservoir characteristics of shale reservoir in the study area by collecting and sorting out the basic geological data of the area and using various means of testing. The process of shale gas reservoir formation and its geological control factors are discussed. Finally, the potential favorable areas for shale gas exploration and development are predicted. The main results obtained are as follows. On the basis of data collation and laboratory experimental analysis, the target interval of Taiyuan formation is delineated, and the development law of shale reservoir in the study area is summarized. The average thickness of the Taiyuan target layer is 52.72 m, and the horizontal trend is gradually thinning south to east, and the spatial morphology is mainly controlled by the structure. The type of organic matter is mainly III kerogen, the average content of organic component of shale is 4.35%, and the content of organic matter is high. The maturity is lower in the north, higher in the south and higher in the east. The average porosity of coal and mudstone is 4.68%. The pore types are mainly micropore and transition pore. Mudstone permeability is poor, reservoir permeability is greatly affected by filling. The shale gas content is 0.76 ~ 0.92 m ~ (3 / t), and the relationship between shale gas content and buried depth is not obvious. The geological process of shale gas reservoir formation in this area is studied by means of comprehensive analysis and numerical simulation. From the beginning of the Carboniferous Permian system to the maximum buried depth, the paleogeothermal temperature was over 100 鈩，
本文编号：2385267
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