苏里格气田桃2区块山_1段砂体特征及规模定量研究

The Quantitative Research on Characteristics and Scale of Sand Bodies in Section Shan 1 of Block Tao 2 in Sulige Gasfield

通过利用桃2区块的基础地质资料和测井资料，分析砂岩的矿物成分和微观结构，研究砂体成因和叠置类型，并在收集和统计研究区山，段单砂体厚度范围的基础上，利用相关公式定量计算砂体规模．结果表明，研究区山，段的砂岩成熟度较低，孔隙类型以次生孔隙为主，边滩、决口扇和河底滞留沉积是主要的砂体成因类型，砂体的叠置类型可分为简单孤立型、冲刷叠置型以及冲刷切削型，并以简单孤立型为主．研究区的砂体发育良好，山1^1、山1^2、山1^3亚段单期河道宽度范围分别为69—151m，107～200m，107～200m以及主砂带的宽度范围分别为665—1460m，1035～1934m，1035～1934m．在此基础上，绘制砂体平面展布图，可以看出研究区的砂体呈北北东至南南西向条带状展布，砂体厚度主要分布在10～20m，具有曲流河的特征．

By using the basic geological data and the logging data of the block Tao 2, and analyzing the mineral composition and microstructure of sandstone and studying on the formation and the type of sand body, based on the collection and statistics of thickness range of single sand body in the section Shan 1 of the study area, the scale of sand body is quantitatively cal- culated by using of the relevant formula. The results show that the maturity of sandstone in the section Shan 1 of the study area is relatively low, the pore types are mainly secondary pores, beach, crevasse splay and river deposited are the main sand body types, the overlapping types of sand bodies can be divided into the simple type of isolation, the scouring and folding type and the erosion cutting type. In addition, the type of the sand body is mainly the simple type of isolation. The sand body in the study area is well developed, the single channel width ranges in the sub-section Shan 11, Shan 12 and Shan 15 are 69 - 151 m, 107 -200 m and 107 -200 m respectively, and the main sand belt width ranges are 665 - 1 460 m, 1 035 ~ 1 934 m, 1 035 - 1 934 m respectively. The plane distribution map of sand body is draw on this basis, and we can see that the sand body in the study area is strip distributed from the North East to the South West, the thickness of sand bodies are mainly distributed in the 10 - 20 m and it has the characteristics of meandering river.