成都理工大学学报（自然科学版）2017，Vol.44Issue(1)：48-56,9.DOI:10.3969/j.issn.1671-9727.2017.01.07
渝东南牛蹄塘组页岩成岩作用及其对孔隙的影响
Diagenesis and its effect on pores of the Niutitang Formation shale in southeast Chongqing,China
摘要
Abstract
Samples of drilling cores from the Well Yuke 1 are studied in order to correctly recognize the diagenesis and its effect on pores of the mature shale in the Lower Cambrian Niutitang Formation, southeast Chongqing.The testing of crystallinity of illite and maturity (Ro )reveals that the Niutitang Formation shale is in the late diagenetic stage and the application of SEM and nitrogen adsorption experiments to the shale determines the characterization of pores qualitatively and quantitatively.It shows that the pores in the shale consist of organic pore,intragranular pore and intergranular pore in which mid sized pores are dominant with average diameter of 4 .9 3 nm and average pore volume of 0.014 3 cm3/g.Strong compaction and cementation in the Niutitang Formation shale lead to the decreases of intergranular pores.Study indicates that illite accounts for 86%of total clay minerals and intragranular pore is the main pore type in clay minerals.Dissolution forms intragranular pore and intergranular pore with relatively large pore size,while organic pore is resulted from the organic maturation.With the increase of maturity, pore volume and pore size in organic material are decreased.It reveals that the combined reformation by different diagenesis is an important reason for the variation of pore in the shale.关键词
成岩作用/孔隙特征/牛蹄塘组/渝科1 井Key words
diagenesis/characteristics of pore/Niutitang Formation/Well Yuke 1分类
天文与地球科学引用本文复制引用
张艺凡,于炳松,孙梦迪..渝东南牛蹄塘组页岩成岩作用及其对孔隙的影响[J].成都理工大学学报（自然科学版）,2017,44(1):48-56,9.基金项目
国家自然科学基金项目（41572134）；高等学校博士学科点专项基金优先发展领域项目（20120022130001）。 （）
