塔里木盆地凝析气藏测井综合评价方法  

COMPREHENSIVE LOG EVALUATION OF THE CONDENSATE RESERVOIRS IN TALIMU BASIN

作　　者：宋帆[1] 海川[1] 李华玮 

机构地区：[1]塔里木石油勘探开发指挥部勘探研究中心

出　　处：《天然气工业》1999年第2期50-54,共5页Natural Gas Industry

摘　　要：目前，塔里木盆地发现的凝析气藏（田）有４０余个，分布范围几乎遍布全盆地的各个层系。其中以塔北隆起下第三系到三叠系最为集中。凝析气藏与正常干气藏、伴生气藏的成藏环境，烃类的组分、物理化学特征都有着很大区别。首先，凝析气藏重烃组分较干气藏相对要高，相对密度大，在测井响应中气显示不明显；其次，油气藏的储层条件也差别较大，既有高孔高渗的优质储层，也有低孔低渗的劣质储层，给测井解释造成一定困难。针对塔里木盆地凝析气藏的这一特点，结合地质录井、油气分析等资料，提出了一套利用测井技术识别和评价凝析气藏的方法。经过实践证明，这是一套适于塔里木盆地的油气层解释方法。在此基础上对凝析气藏进行储盖组合分析，以达到测井综合评价凝析气藏的目的。At present, the condensate gas reservoirs (fields) found in Talimu Basin are more than forty, which are located in almost various series of strata over the whole basin, but mostly concentrated in Paleogene to Triassic in Tabei Uplift. The reservoir formed environment, hydrocarbon component and physicochemical properties of the condensate gas reservoir are much different from those of the normal dry gas reservoir and associated gas reservoir. The first, in comparison with the dry gas reservoir, the condensate gas reservoir is of higher heavy hydrocarbon component content, larger specific density and unnoticeable gas shows in log response; the second, the reservoir bed conditions of the oil and gas reservoirs are considerably different from each other, being of both superior reservoir with high porosity and high permeability and inferior reservoir with low porosity and low permeability, which makes a certain difficulty to log interpretation. According to these properties of the condensate gas reservoirs in Talimu Basin, a set of methods of identifying and evaluating the condensate gas reservoirs are proposed in combination with the data on the geological logging and oil & gas analyses, etc. Through practice it is proved that this set of interpretation methods are suitable for the oil and gas bearing strata in Talimu Basin. Based on this a reservoir cap assemblage analysis is carried out for the condensate gas reservoirs, therefore the goal of comprehensively evaluating the condensate gas reservoirs by well logging has been achieved.

关 键 词：凝析气藏 测井 综合地层评价 塔里木盆地 储集层 

分 类 号：P618.130.8[天文地球—矿床学] P631.84[天文地球—地质学]