Pore-throat Structure of Tight Sandstone in Yanchang Formation of Huangling Mining Area Based on Scanning Electron Microscopy and Mercury Porosimmetry

Based on scanning electron microscopy and mercury porosimmetry,a large number of experimental data of pores and pore throats of tight sandstone reservoirs are obtained,and the characteristics of pore types,capillary pressure curves and quantitative parameters of pore throats of Yanchang Formation in Huangling mining area are studied.The results show that the main reservoir space types of Yanchang Formation sandstone are primary intergranular pores and feldspar dissolution pores.The pore-throat structure is medium-small pore and thin-small throat type,and the sorting is good to medium.The mercury porosimmetry curve shows a slightly coarse-thin skew.Combining the morphological characteristics of the mercury porosimmetry capillary pressure curve and the quantitative parameter characteristics of pore throats,the Yanchang Formation s micro pore structure is divided into types I,II,III,and IV.Tight oil reservoirs with type I and II pore structure characteristics are favorable.This study has reference significance for the later evaluation of tight sandstone reservoirs in Huangling mining area.

Structures and Properties of Three Solvent-Dependent Chiral Compounds Based on N-Benzoyl-L-glutamic Acid

三溶剂依赖者 chiral 铜( II )混合物，{[ Cu 2(bzgluO)2(H2 O ) 2]·4H2 O } n ( 1 )，{[ Cu 2(bzgluO)2(DMSO)2]·H2 O } n ( 2 )并且[ Cu 2(bzgluO)2(DMF)2] n ( 3 )( H 2 bzgluO=N-benzoyl-L-glutamic 酸)在周围的温度条件下面被综合了并且由元素的分析描绘了，红外系列，紫外系列， thermograv 1 和 2 两个都在斜方晶的空间使结晶的混合物组织 P2 12121 。化合物 3 在四角形的空间组 P4 3 结晶。化合物 1 展出像梯子的 1D 链结构，它被结合氢的相互作用扩大形成 3D 超分子的网络。2 和 3 两个都给像钻石的 3D 结构的混合物。而且，在 2 有结合氢的相互作用。结构的差别显示溶剂系统在协作混合物的 modulating 结构起一个关键作用。圆形的二色性(CD ) 和混合物的磁性也被调查了。