Z油田天然裂缝测录井识别技术应用  

Application of logging recognition technique in natural fracture in Z oilfield

作　　者：赵军龙[1] 李兆明[2] 李建霆[2] 王胜华[2] 李甘[1] 

机构地区：[1]西安石油大学油气资源学院,陕西西安710065 [2]中国石油长庆油田分公司第二采油厂,甘肃庆城745100

出　　处：《石油地球物理勘探》2010年第4期584-590,共7页Oil Geophysical Prospecting

基　　金：陕西省工业攻关计划基金资助项目(项目编号2009K10-15)

摘　　要：为了精细评价Z油田储层的裂缝影响,本文基于实际资料,结合国内外裂缝研究实际,以沉积构造背景与应力场背景研究为基础,综合利用地质、岩心、测井及生产动态等资料,对有限取心井进行细致研究,建立了Z油田特低渗砂岩储层天然裂缝判识标准,并优选适用的天然裂缝判识方法,进而以单井裂缝识别为基础,运用多种方法预测裂缝的平面分布规律。研究结果表明:Z油田储层天然裂缝普遍发育,且以高角度缝为主;适用于该区的裂缝判识方法主要有重构FRAC1裂缝指示参数法、测井曲线R/S变尺度分析法和渗透率异常分析法等;区内裂缝平面上总体呈断续带状分布,南部裂缝走向呈近南北向,中部裂缝走向为北北东向,北部裂缝走向为北东东向;裂缝发育的区域渗透率级差显著。In order to accurately evaluate and predict the influence of fracture in Z oilfield,the integrated studies were conducted based on the field datasets in the oilfield and the fracture research in both home and abroad,deposition tectonic setting and stress field background study were the basis and the geological data,core data,well logging data,production performance and other data were integratedly utilized in the studies.For the few cored wells the detailed studies were conducted,the natural fracture identification criterion for sand reservoir with ultra-low permeability was established,the proper natural fracture identification method was optimized,then based on single well fracture identification,the plane distribution law for the fractures was predicted by applying several prediction methods.The study results show that the natural fractures are fully developed in the reservoirs of Z oilfield,large angle fractures are the dominant,the fracture identification methods which fit the oilfield mainly include reconstructed FRAC1 fracture index parameter method,well logging curve R/S variable scale analysis method and permeability anomaly analysis method and so on.The plane distribution of the fractures in the oilfield is in intermittent zonal distribution form,the distribution direction for the fractures in the south is near SN direction,the fractures in the middle distribute is NNE direction,and the fractures in the north distribute is NEE direction,in the fracture development zone the permabilities vary greatly.

关 键 词：Z油田 天然裂缝 测井 录井 识别技术 分布规律 

分 类 号：P618.130.2[天文地球—矿床学]