摘要
火山岩储层总体属于低孔渗储层评价的范畴,由于测井含气响应远弱于岩石骨架响应,流体识别面临气、水层区别难的问题;由于岩性和孔隙结构复杂引起阿尔奇参数多变,测井解释面临饱和度定量计算精度不高等问题.针对上述问题,提出"定性解释与定量解释相互独立、相互验证"的火山岩测井解释原则.在气层识别方面,从重构孔隙度气层识别组合曲线、研究电阻率相对值、应用核磁测井技术以及分析储层含气丰度与测井响应差异等四个研究方向探索了不同储层的测井识别依据,根据上述研究成果,确定了5类储层的测井判别依据,实现了火山岩定性解释;在火山岩定量解释方面,由于电阻率曲线本身就是岩性和孔隙结构的综合反映,引入基于电阻率测井响应的可变m值阿尔奇计算公式,应用生产测试成果验证,证实该方法定量计算储层含气饱和度精度高.根据上述研究成果,系统建立了松南火山岩测井解释模型.应用新的火山岩储层测井解释方法,多口新井的测井预测结果被生产测试所验证,应用效果良好.
In view of complicated volcanic lithology, versatile matrix parameter, deeply disturbed reservoir fluid because of lithology and mud invasion, this thesis tentatively studies a series of work under the aim of guiding gas field development. Volcanic rocks reservoir belongs to low porosity and low permeability reservoir. Fluid identification faces the problems of difficult distinction between gas and water as the logging response on gas is far lower than the logging response on rock skeleton. Saturation calculation faces the problems of low interpretation precision as various Archie＇ s parameters caused by complicated lithology and pore structures. In view of above problems, we bring forward to a log interpretation method of volcanic rocks that is the mutual independence and mutual authentication between the qualitative interpretation and the quantitative interpretation. In view of gas identification, there are four research directions exploring the gas identification criterion based on logging which are the reconstructions of porosity composite curves identify gas, research on the relative value of resistivity, application of nuclear magnetic logging technology, and analysis of reservoir＇s gas-bearing and difference in log response. The reconstructions of porosity composite curves to identify gas means change density log curve and acoustic log curve into porosity of density curve and porosity of acoustic curve. Then the gas reservoir can be identified by using the three porosity log curves. Study on the relative value of resistivity means searches the difference value between the deep investigation laterolog and the shallow investigation laterolog. Based on these results, we have completedlogging identification of five types of reservoirs and founded qualitative interpretation of volcanic rocks~ in terms of quantitative interpretation of the volcanic rocks, as the resistivity log curve is the comprehensive response of lithology and pore structures, using the Archie formula which contains various m value based
出处
《地球物理学进展》
CSCD
北大核心
2012年第5期2033-2042,共10页
Progress in Geophysics
基金
石油化工联合基金(40739904)
国家重大专项课题(2008zx05005-002)
关键词
火山岩测井解释
气层定性解释
定量解释
测井解释模型
the log interpretation of the volcanic rocks, gas identification, qualitative interpretation quantitativeinterpretation, the criterion of log interpretation
