大牛地气田上古生界气层测井识别方法

WELL LOG IDENTIFICATION METHOD FOR THE UPPER PALEOZOIC GAS RESERVOIRS OF DANIUDI GAS FIELD

大牛地气田上古生界气层属分流河道沉积 ,主要岩性为中、粗粒岩屑砂岩与岩屑石英砂岩 ,砂岩的结构成熟度和成份成熟度都较低 ,具有低渗、低压、低产的产出特征。为了准确地评价储层的含气性 ,有效地区分气层和干层 ,基于岩石物理学研究 ,并通过油气地质特征和测试成果的综合分析 ,构筑了一组以岩性、电性、物性参数为主并经过适当变换的多参数交会图气层识别方法 ,在此基础上建立了包括气测异常值在内的气层、干层划分标准。该方法的基本特点是充分放大测井信息对天然气的响应特征 ,增强气层、干层的判别差异。应用这套气层识别方法和划分标准 。

The upper paleozoic gas reservoirs of Daniudi gas field belongs to distributary channel deposit and their main lithology is medium-grained and coarse-grained lithic sandstone and lithic quartzose sandstone.The textural and compositional maturity of the sandstone are relatively low.The sandstone reservoirs are characterized by low permeability,low pressure and low output.In order to accurately evaluate the gas-bearing performance of the reservoirs and to effectively differentiate gas reservoir and dry one,ba...