摘要
兴隆台古潜山是辽河坳陷中重要的深层潜山油藏,对提高辽河油田原油产量具有重要意义。兴隆台太古界潜山主要储层由变质岩和岩浆岩组成,其中变质岩储层包括黑云斜长片麻岩、黑云母变粒岩、斜长角闪岩、角闪岩和混合岩。储集空间以构造裂缝为主,储层渗透性好。在测井曲线对储层敏感因素分析的基础上,选用现有测井资料中带有裂缝信息的电阻率、声波时差、密度、自然电位幅度差和双侧向等测井数据,应用测井交会图方法,结合试油工作的结果,寻找规律,得出了针对兴隆台古潜山储层进行定量及定性识别和评价的标准,即:岩石密度<2.75g/cm3,自然电位幅度差≥7Ω·m,双侧向幅度差20～1500Ω·m,深侧向电阻率20～2000Ω·m,声波时差170～230μs/m。通过生产测井解释数据进行了验证,证明上述储层评价标准基本适用,为兴隆台古潜山油井调层提供了理论基础。
Xinglongtai paleo-buried hill is one of the major deep-buried reservoirs in the Liaohe depression, and its exploitation is very important for increasing production of crude oil in the Liaohe oil field. The reservoir of the Xinglongtai buried hill is mainly composed of magmatic and metamorphic rocks, and the latter consists of biotite-plagioclase gneiss, biotite leptynite, （plagioclase） amphibolite and migmatite. The reservoir space is mainly fractures with good permeability. On the basis of analysing the response of well logging to the reservoir, using log data reflecting fractures （such as resistivity log, sonic log, density log, spontaneous potential log and dual laterolog） and combining with the cross-plots of log data and the results from oil-production testing, we summarize in this paper the regularities of logging curves and parameters, and suggest several criteria for qualitative and quantitative identification and evaluation of reservoir in the Xinglongtai paleo-buried hill. These criteria include rock density of less than 2.75 g/cm3, range difference of spontaneous potential of higher than 7 Ω·m, range difference of laterolog between 20 and 1 500 Ω·m, electrical resistivity in deep investigation between 20 and 2 000 Ω·m, and interval transit time of 170-230 μs/m. These criteria are proved to be useful after a test with the production well logging, and provide theoretical basis for layeradjusting of oil well in the Xinglongtai paleo-buried hill.
出处
《高校地质学报》
CAS
CSCD
北大核心
2010年第3期365-374,共10页
Geological Journal of China Universities
关键词
古潜山
储层
评价标准
辽河油田
兴隆台
paleo-buried hill
reservoir
evaluation criteria
Liaohe oil field
Xinglongtai
