克拉玛依油田克-百断裂带一区石炭系内幕火山机构特征  

Characteristics of Carboniferous Inside Volcanic Mechanisms in the First Area of Kebai Fault Zone in Karamay Oilfield

作　　者：袁述武[1] 邱争科[1] 李若琛 王楚涵 余永莉[1] 潘鹏[1] Yuan Shuwu;Qiu Zhengke;Li Ruochen;Wang Chuhan;Yu Yongli;Pan Peng(No.2 Oil Production Plant Xinjiang OilfieldCompany,PetroChina,Karamay,Xinjiang,834000,China)

机构地区：[1]中国石油新疆油田分公司采油二厂,新疆克拉玛依834000

出　　处：《新疆地质》2024年第4期508-514,共7页Xinjiang Geology

基　　金：新疆油田准噶尔盆地油藏富集规律及勘探技术研究与应用项目(2017E-0401)资助。

摘　　要：在克拉玛依油田克-百断裂带一区石炭系内幕钻探的探井、评价井多井试油获高产油流,通过岩心、薄片和物性等资料的分析,对石炭系内幕火山机构储集层特征进行研究。结果表明:一区石炭系以溢流相玄武岩、爆发相角砾岩为主,玄武岩和安山岩自然伽马相对值≤0.3,0.3<角砾岩自然伽马相对值≤0.7,凝灰岩自然伽马相对值>0.7;研究区火山岩喷发中心位于A18、A5等井区,沿克拉玛依断裂、北黑油山断裂呈多点中心式喷发,高角度火山通道多期次上拱挤压穿切连续地层,火山通道侧翼形成复杂张性立体裂缝网络,有利于改善储层,是油井高产的重要因素;明确了石炭系构造、岩性、风化淋滤控制作用的“三元控储”储层发育模式,风化壳为C4+C3期次,厚度300~600 m。纵向有利储层自上而下逐渐变差,C4+C3+C2期次生产效果较好,可作为后续建产的主力层。High yield oil flow was obtained through multiple well testing of exploration wells and evaluation wells drilled inside the Carboniferous system in the first area of Kebai fault zone in Karamay oil field.Through the analysis of core,thin section and physical property data,as well as the study of reservoir characteristics of Carboniferous internal volcanic institutions.The results show that the Carboniferous system in Zone 1 is mainly composed of overflow phase basalt and explosive phase angle conglomerate.The natural gamma relative values of basalt and andesite are≤0.3,0.3<natural gamma relative value of conglomerate≤0.7,and natural gamma relative value of tuff>0.7;The volcanic rock eruption center in the study area is located in A18,A5 and other well areas.It is a multi-point central eruption along the Karamay fault and the North Heiyoushan fault.The high angle volcanic channel is pressed and cut through the continuous formation in multiple stages.The side of the volcanic channel forms a complex tensile three-dimensional fracture network,which is conducive to improving the reservoir and an important factor for high production of oil wells;The development model of the“ternary controlled reservoir”reservoir,which is controlled by the structure,lithology,and weathering and leaching of the Carboniferous period,has been clarified.The weathering crust is in the C4+C3 stage with a thickness of 300-600 m.The vertical favorable reservoir gradually deteriorates from top to bottom,and the production effect of the C4+C3+C2 phase is better,which can be the main layer for subsequent production.

关 键 词：克拉玛依油田 火山机构 三元控储 构造作用 岩性作用 风化淋滤作用 

分 类 号：P534.45[天文地球—古生物学与地层学] P542.35[天文地球—地质学]