楚雄盆地上三叠统舍资组泥页岩储层特征分析——以滇禄地3井为例
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P624

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云南楚雄地区1:5万页岩气基础地质调查填图试点项目,项目编号:DD20160182-08


Analysis of Shale Reservoir Characteristics In the Upper Triassic Shezi Formation in Chuxiong Basin-Taking Well 3,Yunnan-Ludi as an Example
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    摘要:

    海陆过渡相泥页岩是页岩气勘探开发的重要领域,本文以楚雄盆地滇禄地3井上三叠统舍资组泥页岩为研究对象,结合泥页岩的有机地化特征,运用扫描电子显微镜、全岩X-射线衍射分析、孔隙度与渗透率测量实验、现场解析实验、核磁共振等技术对滇禄地3井岩心样品进行分析测试,进而分析泥页岩储层特征。结果表明:滇禄地3井上三叠统舍资组泥页岩干酪根类型均为Ⅱ2型,舍资组下段泥页岩有机碳含量相对较高主要集中在0.4%-2.25%之间,有机质成熟度主要处于过成熟阶段,矿物主要由脆性矿物、碳酸盐矿物、粘土矿物组成,其中脆性矿物含量相对较高,平均为40.87%,有利于页岩气的压裂,孔隙度在0.6%-1.6%之间,平均为1.01%,渗透率在0.0009652×10-3μm2-0.0335421×10-3μm2之间,平均为0.007027×10-3μm2,表现出低孔、低渗特征;储集空间类型以粘土矿物层间缝、颗粒粒缘缝为主,孔隙以微孔、小孔为主,含少量中孔,孔隙之间连通性较差,含气量在0.06m3/t-1.00m3/t之间,平均值为0.564m3/t。与国内已取得突破的海陆过渡相页岩气勘探区进行页岩气地质条件对比可见:楚雄盆地上三叠统舍资组泥页岩具有良好的页岩气勘探潜力。

    Abstract:

    Sea-land transition phase mud shale is an important field of shale gas exploration and development. In this paper, the core samples of Upper Triassic Shezi Group shale as the research object in Well Yunnanludi3,Chuxiong Basin,combining with the organic geochemical characteristics of the shale,using scanning electron microscope,whole-rock X-ray diffraction analysis, porosity and permeability Measurement experiments,field analytical experiments, nuclear magnetic resonance,and other technologies,are used to analyze and test for analyzing the characteristics of shale reservoirs. The results show that the kerogen type of the Upper Triassic Shezi Group shale in Well Yunnanludi 3 is all type II2,The organic carbon content in the lower shale of Shezi Formation is relatively high, mainly between 0.4% and 1.25%,the organic matter maturity is mainly in the over-mature stage;and the minerals are mainly composed of brittle minerals,carbonate minerals,and clay minerals;The content of brittle minerals is relatively high and the average is 40.87%,which is conducive to the fracturing of shale gas,the porosity between 0.6% and 1.6%,with an average of 1.01%,and the permeability between 0.0009652×10-3μm2 and 0.0335421×10-3μm2,with an average of 0.007027×10-3μm2,showing low-porosity and low-permeability. The reservoir space is dominated by interlayer seam and grain margin seam of clay minerals. The pore types are mainly micro-pores and small pores,with a small number of middle pores. The connectivity between pores is poor,and the gas content is relatively low between 0.06m3/t and 1.00m3/t,and the average value is 0.564m3/t. By comparing the geological conditions of shale gas with those of Marine and continental transitional shale gas exploration areas in China, it can be concluded that the shale shale of upper Triassic Shezi Formation in Chuxiong Basin has good shale gas exploration potential.

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客昆,秦建华,牟必鑫,等. 楚雄盆地上三叠统舍资组泥页岩储层特征分析——以滇禄地3井为例[J]. 科学技术与工程, 2021, 21(28): 12020-12030.
Qie Kun, Qin Jianhuan, Mou Bixin, et al. Analysis of Shale Reservoir Characteristics In the Upper Triassic Shezi Formation in Chuxiong Basin-Taking Well 3,Yunnan-Ludi as an Example[J]. Science Technology and Engineering,2021,21(28):12020-12030.

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  • 收稿日期:2020-11-30
  • 最后修改日期:2021-07-06
  • 录用日期:2021-04-01
  • 在线发布日期: 2021-09-29
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