测井技术2018，Vol.42Issue(2)：149-155,7.DOI:10.16489/j.issn.1004-1338.2018.02.005
中东Y油田碳酸盐岩油藏沥青层测井评价
Log Evaluation of Bitumen Intervals in a Carbonate Reservoir in the Y Oilfield,Middle East Area
摘要
Abstract
The bitumen layer of Y Oilfield in the Middle East is characterized by strong plasticity and poor borehole stability.When bitumen is immersed into the wellbore,drilling efficiency is reduced,w hich limits the development efficiency of the carbonate reservoir.T his paper compares the differences of geological features and logs response between conventional carbonate reservoir and the bitumen intervals,it also discusses the methodology used to distinguish the heavy oil bitumen from the solid and semi-solid(no flow)bitumen.The combination of the core and test data as well as log response analyses highlights that the typical bitumen interval has high clay contents and natural gamma, low uranium free gamma, and poor permeability. Those characteristics and GR-KT H intersection can be used together to identify the bitumen intervals. Moreover,Poisson's ratio,P-wave velocity ratio,and wave impedance calculated by dipole sonic logging can effectively distinguish heavy oil and non-liquid bitumen reservoirs.Based on the log interpretation result and the regional structure analysis,the cause and distribution characteristics of the bitumen layer can be predicted T he logging evaluation technology effectively solves the problem of identification and distribution of bitumen layer in the study area,and provides logging support for development and drilling safety of carbonate reservoir.关键词
测井评价/碳酸盐岩油藏/沥青层/钻井安全/分布预测Key words
log evaluation/carbonate reservoir/bitumen intervals/drilling safety/distribution prediction分类
天文与地球科学引用本文复制引用
葛祥,周贤杰,张世懋..中东Y油田碳酸盐岩油藏沥青层测井评价[J].测井技术,2018,42(2):149-155,7.基金项目
国家科技重大专项(2017ZX05005005) （2017ZX05005005）
