元坝东地区须四段长石岩屑砂岩储层预测方法研究  

RESERVOIR PREDICTION METHOD FOR XUJIAHE 4 MEMBER, EASTERN YUANBA AREA

作　　者：刘海涛[1] 何志勇[1] 林琳[1] 肖伟[1] 

机构地区：[1]中国石化勘探分公司

出　　处：《天然气勘探与开发》2015年第2期13-17,2-3,共5页Natural Gas Exploration and Development

基　　金：国家科技重大专项(2011ZX05002-004)"碎屑岩层系大中型油气田富集规律与勘探关键技术"

摘　　要：元坝东地区须四段长石岩屑砂岩储层横向非均质性强,导致沉积相带边界刻画困难、储层预测精度低等问题。通过储层精细标定,明确了储集层的测井及地震响应特征;利用波形分类、均方根振幅属性,明确了储层的宏观展布范围;在储层宏观分布范围内分析储层敏感参数,开展声波曲线重构进行拟声波波阻抗反演,对有利储层分布区及厚度进行精细预测。研究区须四段通过运用地震地质综合储层预测技术所得的储层厚度与实钻吻合,证实该技术可有效提高长石岩屑砂岩储层预测的精度。In eastern Yuanba area, the Xujiahe 4 Member(T3x4)is composed of feldspathic sandstone. Horizontally, this sandstone reservoir is characterized by strong heterogeneity, which brings about some problems, such as distinguishing the boundary of depositional facies belt very difficult and predicting reservoir with very low accuracy. So, through fine calibration, many welllogging and seismic reflection characteristics are defined at first; and then, according to waveform classification and root-mean-square amplitude attribute, the macro distribution scope is determined; thirdly, some sensitivities are analyzed; fourthly, an impedance inversion is implemented for the pseudo acoustic wave by acoustic-wave curve reconstruction; finally, the distribution region and thickness of reservoir are predicted. Results show that the reservoir thickness, which is obtained from a comprehensive seismic-geologic reservoir prediction, matches with actual one from drilling, so proving that this prediction technology is a very effective way to increase prediction accuracy for this feldspathic sandstone reservoir.

关 键 词：元坝东 须家河组四段 长石岩屑砂岩储层 储层预测 特征曲线重构 

分 类 号：P618.13[天文地球—矿床学]