页岩气储层岩石孔隙特征对岩石密度作用机理探究

发布时间：2019-03-24 15:28

【摘要】：利用页岩气储层岩石密度等信息反演储层孔隙类型等发育特征,在页岩气储层评价过程中有重要意义。研究通过岩石各组分含量加权计算岩石密度,具体地分析了北美的几套热演化成熟的页岩气有利层系的孔隙度及孔隙类型与密度间关系,分析影响岩石密度的因素,得出了(1)相同或相近孔隙度的具"有机孔"优势岩石呈现出高相对密度,"凝絮孔"等其他无机孔隙优势的岩石呈现出低相对密度;(2)具相同孔隙类型优势的岩石密度随着孔隙度的增大而降低;(3)具不同孔隙类型优势的岩石对比中,随孔隙度增大"有机孔"优势岩石比具其他类型优势孔隙的岩石密度低,反之则高。这些结论可为快速大致判断新区新井目的层位孔隙发育特征提供思路。
[Abstract]:It is of great significance in shale gas reservoir evaluation to use shale gas reservoir rock density and other information to invert reservoir pore types and other developed characteristics. Based on the weighted calculation of rock density by the content of each component of rock, the porosity, pore type and density of several sets of shale gas favorable strata with mature thermal evolution in North America are analyzed in detail, and the factors affecting rock density are analyzed. It is concluded that (1) the dominant rocks with "organic pores" with the same or similar porosity show high relative density, and the rocks with dominant inorganic pores such as "flocculating pores" show low relative density; (2) the density of rock with the same pore type decreases with the increase of porosity; (3) in the rock correlation with different pore types, the density of "organic pore" dominant rocks is lower than that of other types of dominant pores with the increase of porosity, and on the contrary, the density of the dominant rocks with other types of dominant pores is higher. These conclusions can provide a way to quickly and roughly judge the pore development characteristics of new wells in the new area.
【作者单位】：中国地质大学(北京)能源学院;中国地质大学(北京)储层演化与油气富集教育部重点实验室;中国地质大学(北京)页岩气资源评价与战略选区国土资源部重点实验室;
【基金】：国家自然科学基金项目(41472108) 国土资源部公益性行业科研专项(201311022)
【分类号】：P618.13

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