摘要
低孔低渗气藏普遍存在物性差、束缚水饱和度高、气层与水层测井响应差异不明显的现象;海上钻井常用水基钻井液体系,导致钻井液更容易侵入到地层中,电阻率测量值低于地层真电阻率,加剧了流体识别的困难程度,以上这些问题都给测井储层评价带来极大的挑战。阐述了通过电阻率反演,获得原状地层电阻率、侵入带电阻率和侵入深度,并利用反演获得的原状地层电阻率进行地层评价,为准确判断油气层提供依据。
Low porous and permeable reservoir generally have poor physical property,high irreducible water saturation,and the difference in logging response between gas reservoir and water reservoir is not obvious. Also,the water-based drilling fluids used in offshore drilling makes it easier for drilling fluid to penetrate into the formation,making the resistivity measured lower than the true resistivity of the formation and increasing the difficulty of fluid identification. These objective problems bring great challenges to logging reservoir evaluation. This paper describes how to obtain the original formation resistivity,intrusion zone resistivity and intrusion depth by using resistivity inversion. Then,the inversion results can be used for formation evaluation,which can provide a basis for accurate identification of oil and gas reservoirs.
作者
吴伟
魏杰瑞
Wu Wei;Wei Jierui(China Oilfield Services,Hebei Langfang 065201)
出处
《石化技术》
CAS
2023年第1期112-114,共3页
Petrochemical Industry Technology
关键词
低孔低渗储层
电阻率反演
地层评价
Low porous and permeable reservoir
Resistivity Inversion
Formation Evaluation
