摘要
柴达木盆地为一高原咸化湖盆,渐新世早期沉积了复杂的碳酸盐岩。砂西地区下干柴沟组岩性包括砂屑灰/云岩、藻灰/云岩、泥晶灰/云岩、泥灰岩、灰质砂岩等。常规测井能较好地区分纯碳酸盐岩,但对于混积型的碳酸盐岩识别难度较大。基于岩心刻度成像测井,建立了6种成像测井模式:高阻亮色块状模式、中高阻橙色块状模式、暗色块状模式、黄白相间正弦曲线模式、亮色-明暗相间正弦曲线模式、橙色-明暗相间正弦曲线模式。这6种模式对有效识别下干柴沟组地层岩性有很强的指导作用。
The Qaidam Basin is a plateau salinized lake basin,containing Early Oligocene sedimentary complex carbonate rocks.The lithology of the Lower Ganchaigou Formation in the Shaxi area includes asbestos/dolomite,algal ash/dolomite,smectite/dolomite,marl,and gray sandstone.Conventional logging can distinguish pure carbonate rocks well,but it is more difficult to recognize mixed carbonate rocks.Based on core-scale imaging logging,six imaging logging modes are established:high resistance bright block mode,medium high resistance orange block mode,dark block mode,yellow-white phase sinusoidal mode,brightlight and dark sinusoidal mode,orange-light and dark sinusoidal mode.This model has a strong guiding role in effectively identifying the lithology of the Lower Ganchaigou Formation.
作者
吴颜雄
赵辉
杨智
李海鹏
刘乐
刘君林
施奇
Wu Yanxiong;Zhao Hui;Yang Zhi;Li Haipeng;Liu Le;Liu Junlin;Shi Qi(Research Institute of Exploration & Development,Qinghai Oilfield,PetroChina,Dunhuang Gansu 736202,China;Borehole Operation Company,Qinghai Oilfield,PetroChina,Dunhuang Gansu 736202,China;Research Institute of Drilling and Production Technology,Qinghai Oilfield,PetroChina,Dunhuang Gansu 736202,China;Research Institute of Petroleum Exploration & Development,PetroChina,Beijing 100083,China)
出处
《地质科技情报》
CAS
CSCD
北大核心
2019年第1期265-269,共5页
Geological Science and Technology Information
基金
国家科技重大专项"致密油富集规律与勘探开发关键技术"(2016ZX05046-006)
中石油股份有限公司重大科技专项"柴达木盆地建设高原大油气田勘探开发关键技术研究与应用"(2016E-0103)
关键词
柴达木盆地
砂西地区
碳酸盐岩
成像测井
地质解译
Qaidam Basin
Shaxi area
carbonate
imaging logging
geological interpretation
