摘要
综合应用测井资料和铸体薄片、扫描电镜、X衍射、粒度、压汞等分析化验资料,对西峰油田庄58区块长8储层的特低渗透成因和主控因素进行了分析。结果表明,特低渗透成因主要受沉积作用和成岩作用的共同影响,主要表现为:沉积微相对储层物性的影响较大,水下分流河道和河口坝明显好于水下分流间湾,而且成分成熟度低和粒度偏细也是造成特低渗的主要因素之一;成岩压实作用和胶结作用使得储层孔隙减小、渗透性变差,而溶蚀作用和少量成岩微裂缝的产生又为储层中油气的附存和渗流、运移提供了有利条件;水下分流河道与河口坝砂体是研究区的主要储层分布相带。
Based on the synthetical use of well logging data and testing data such as cast slice, scanning electron microscope, X-ray diffraction, grain size and mercury penetration, this paper studied the genesis and main controlling factors of extra-low permeability for Chang 8 reservoir of Block Zhuang 58 in Xifeng Oilfield. The study results show that the genesis of extra-low permeability is mainly affected by sedimentation and diagenesis. The sedimental microfacies had a great influence on the reservoir physical property. The porosity and permeability of subsea distributary channel and mouth bar were better than that of subsea distuibutary bay. The low compositional maturity and fine grain size are one of main factors that results in the extra-low permeability. The compaction and cementation have made the porosity and permeability decreasing. And the denudation and microfractures have provided the advantages to hydrocarbon storage and migration. The subsea distributary channel and mouth bar sandbody are the main facies belts of reservoir distribution.
出处
《断块油气田》
CAS
北大核心
2009年第2期12-16,共5页
Fault-Block Oil & Gas Field
基金
国家重点基础研究发展规划“973”基金资助项目(2003CB214606)
关键词
特低渗透成因
长8储层
庄58区块
genesis of extra-low permeability, Chang 8 reservoir, Block Zhuang 58.
