志丹油田洛河区块长6^1低阻油层测井识别方法研究  

Study on Logging Identification Method of Chang 6^1 Low Resistivity Reservoir in Luohe Block,Zhidan Oilfield

作　　者：董旭 刘志延 蔺广泉 乔生虎 DONG XU;LIU Zhi-yan;LIN Guang-quan;QIAO Sheng-hu(Zhidan Oil Production Plant,Yanchang Petroleum Co.Ltd,Zhidan 717500,China)

机构地区：[1]延长油田股份有限公司志丹采油厂,陕西志丹717500

出　　处：《延安大学学报（自然科学版）》2020年第4期32-36,共5页Journal of Yan'an University：Natural Science Edition

摘　　要：陕北志丹油田洛河区块长6^1油层作为该区块的主力油层,区域内低阻油藏较为发育,但由于低阻成因机理较为复杂、表现形式多样,常规识别方法符合率较低。通过对岩心化验分析资料及测井资料的对比分析,认为束缚水饱和度高、地层水矿化度高是形成低电阻率油层的主要油藏背景条件。根据淡水钻井液侵入对油层、水层深浅电阻率影响的差异,运用侵入因子识别法和横向对比识别法可有效提高对低阻油藏的识别符合率。Chang 6^1 reservoir in Luohe block of Zhidan oilfield in northern Shaanxi is the main reservoir in this block,and the low resistivity reservoir is well developed in the area,but because of the complex genetic mechanism and various forms of low resistivity,the coincidence rate of conventional identification methods is low.Through the comparative analysis of core laboratory analysis data and logging data,it is considered that high irreducible water saturation and high salinity of formation water are the main reservoir background conditions for the formation of low resistivity reservoirs.According to the difference of the influence of fresh water drilling fluid invasion on the deep and shallow resistivity of oil layer and water layer,the identification coincidence rate of low resistivity reservoir can be effectively improved by using invasion factor identification method and lateral contrast identification method.

关 键 词：志丹油田 长6^1低电阻率油层 成因机理 测井识别 

分 类 号：TE122[石油与天然气工程—油气勘探]