川西白马庙地区蓬莱镇组储层测井评价方法  

LOGGING EVALUATION METHOD OF PENGLAIZHEN FORMATION RESERVOIR AT BAIMAMIAO REGION IN WEST SICHUAN

作　　者：王兆年[1] 贺洪举[2] 郑小川[2] 

机构地区：[1]西南油气田分公司勘探开发处 [2]四川石油管理局测井公司

出　　处：《天然气工业》2001年第3期30-33,共4页Natural Gas Industry

摘　　要：川西白马庙地区侏罗系蓬莱镇组储层的岩性主要为细粒岩屑长石砂岩和长石岩屑砂岩 ,其电阻率普遍较低 ,储层段一般在 4～ 10Ω·m之间 ,且深、浅双侧向无明显差异 ,蓬莱镇组孔隙性砂岩储层的电阻率与泥岩的电阻率特征差异并不明显 ,给储层识别、流体性质判别等带来困难。在分析储层的测井响应特征的基础上 ,充分利用现代测井技术 (FMI、DSI、IPL等 ) ,建立了以三孔隙度重叠法、阵列中子法的储层识别技术 ,以孔隙度交会法、纵横波速度比法和斯伦贝谢地层流体类型识别技术 (FTI)为主的储层流体性质判断分析技术以及利用斯通利波、核磁共振的渗透性评价方法。研究后认为 ,该区蓬莱镇组储层孔隙度交会法、纵横波速度比、核孔隙度测井资料是判别该区流体性质的主要手段 ,渗透率的高低既受孔隙度的控制 。Penglaizhen Formation reservoir at Baimamiao region in West Sichuan is mainly composed of fine lithic arkoses and feldspathic litharenites. Their resistivities are commonly low, being 4 [similar to] 10 Ω·m in general and the difference between deep and shallow laterologs is unclear. In Penglaizhen Formation, the resistivity property of porous sandstone reservoir is hardly differentiated from that of mudstone, thus causing difficulties in identifying reservoir and in discriminating fluid property. On the basis of analyzing the logging response property of the reservoir, a reservoir identification technique being composed of three porosity log overlay method and array neutron log method, a reservoir fluid property judgement and analysis technique being composed of porosity intersection method, compressional velocity-shear velocity ratio method and Schlumberger formation fluid type identification (FTI) method and a permeability evaluation technique by use of Stoneley wave and nuclear magnetic resonance were developed by fully applying the modern logging techniques as FMI, DSI and IPL, etc. Through research it is considered that the porosity intersection method, compressional velocity-shear velocity ratio and neutron porosity log data are the major measures of identifying fluid property in Penglaizhen Formation reservoir in this region; and the magnitude of permeability is both controlled by porosity and directly proportional to feldspar content.

关 键 词：四川盆地 天然气勘探 晚侏罗世 测井 响应特征 储集层 评价方法 

分 类 号：P631.8[天文地球—地质矿产勘探]