塔里木盆地哈拉哈塘油田潜山区岩溶储层发育特征

The Research on the Development Characteristic of Buried Hills Reservoir in Halahatang Oilfield in Tarim Basin

塔里木盆地哈拉哈塘油田北部潜山区岩溶作用是控制储层发育及油气富集的主要因素,通过对单井及连井储层特征和储层空间类型分析,研究哈拉哈塘油田潜山区岩溶储层发育特征。研究区奥陶系碳酸盐岩储层在垂向上可划分为4个带,即表层岩溶带、垂直渗流岩溶带、水平潜流岩溶带和深部缓流岩溶带,表层岩溶带和深部缓流带储层以孔洞型储层为主;垂直渗流带主要发育裂缝孔洞型储层和裂缝型储层;水平潜流带以洞穴型储层为主;其中水平潜流带的物性最好,为勘探开发的主要目标。在4类储层中,裂缝孔洞型储层厚度最大,而洞穴型储层对储存油气贡献最大。通过对研究区奥陶系碳酸盐岩岩溶储层发育特征的研究,为其勘探开发及快速建产提供参考。

Karstification is the master nalysis of reservoir characteristics and reservoir developing characteristics of control factor of oil/gas enrichment and reservoir developing. It is from the aspace - type of single well and even wells, this paper does system research on buried hill region in Halahatang oilfield. The carbonate reservoir of the Ordovician of the buried hill region in Halahatang oilfield could be split up into 4 zones vertically. Those are the epikarst zone, the vertical seepage zone, the horizontal undercurrent zone and the deep slow flow zone. Pore -cave reservoirs mainly develop in the epikarst zone and the deep slow flow zone. Crack pore - cave and fracture reservoirs mainly develop in the vertical seepage zone. Cave reservoirs mainly develop in the horizontal undercurrent zone. Because of the best physical property, the horizontal undercurrent zone becomes the primary target area for exploration and development. Among 4 types of reservoirs, the pore - cave reservoir develops most commonly for its large thickness, while the cave reservoir contributes most in oil and gas storage. This paper, based on the analysis of carbonate reservoir developing characteristics, provides guidance for the exploration development and building production of Halahatang oilfield.