柯坪塔格组下砂岩段岩石力学参数特征分析及测井解释方法  

The Parameter Characteristics of Lithomechanics and Logging Interpretation of the Lower Sandstone Member of Kalpintag Formation

作　　者：尹帅[1] 单钰铭[1,2] 谢润成[1,2] 杨宏飞[1] 吕孝威[1] 杨波[1] 

机构地区：[1]成都理工大学能源学院 [2]油气藏地质及开发工程国家重点实验室,成都610059

出　　处：《科学技术与工程》2013年第26期7768-7773,共6页Science Technology and Engineering

摘　　要：志留系柯坪塔格组下砂岩段为近年来下古生界碎屑岩油气勘查的重点领域。岩石力学参数特征研究对地应力分析、钻探设计和压裂改造等方面意义重大。通过对某地区柯坪塔格组下砂岩段取样,利用MTS"岩石物理测试系统"开展了对岩石的声学和力学同步测试。分析了岩石力学参数饱气/饱水、阶段变化时的特征。区分砂、泥岩提取志留系测井纵横波时差校对关系;并在实验基础上拟合出弹性模量和泊松比的动静转换公式。通过岩石密度、波阻抗和泥质指数得出模拟地层条件下岩石抗压强度计算公式,抗张强度暂取经验值。最终获得志留系各井岩石力学参数测井解释剖面,并对抗压强度实测值和计算值进行检验,误差较小,从而证明该分析计算方法和剖面都是可信的。The Lower Sandstone Member of Silurian KalpiutagFormation has been the key focus area of the Paleozoic oil and gas exploration since recent years. The parameter characteristics of rock mechanicsare of great significance to the aspects of drilling design and fracturing treatment and so on. Based on sampling of the Lower Sandstone Member of KalpintagFormation and MTS petrophysics test system, synchronizationtest is conducted to the rock acoustics and mechanics and analyzed the characteristics of the gas-full/water-full and periodic changes of rock me- chanics parameters. P wave and S wave, are distinguished and fitted out the dynamic and statistic conversionformula of elasticitymodulusand Poisson ratioon the basis of experiment. Based on rock density, waveimpedance and shale index, the computational formula of the rock compressive strength under the conditions of simulated formations is obtained, with the tensile strength being twelfth of compressive strength. The rock mechanics logging interpretation sections of each Silurian wells is finally acquired and verified the measured values and calculated values of compressive strength, with small error and reliable calculated sections, then providing reference and comparison to subsequent engineering research.

关 键 词：志留系 柯坪塔格组 力学参数 测井解释剖面 检验 

分 类 号：TE122.113[石油与天然气工程—油气勘探]