风西湖相复杂混积岩储层矿物组分及孔隙度计算方法  

A Method for Mineral Composition and Porosity Calculation of Lacustrine Complex Mixed Rock Reservoirs in Fengxi Block

作　　者：陈文安 李纲 郭正权 谢琳 刘国良 李贵梅 CHEN Wen’an;LI Gang;GUO Zhengquan;XIE Lin;LIU Guoliang;LI Guimei(Research Institute of Exploration and Development, Petrochina Qinghai Oilfield Company, Dunhuang, Gansu 736202, China)

机构地区：[1]中国石油青海油田公司勘探开发研究院,甘肃敦煌736202

出　　处：《测井技术》2022年第1期52-57,共6页Well Logging Technology

摘　　要：柴达木盆地风西湖相复杂混积岩储层近年来勘探获得了突破,实现了工业油气产能。近年新钻井目的层位普遍采集了常规、高分辨率电成像、核磁共振及岩性扫描等测井资料,这些资料提供了储层评价中的关键参数,如矿物组分、岩石结构特征、孔隙度等。但对于只测常规资料的老井,难以得到准确的储层参数,需要研究其它的可替代方法。通过敏感曲线分析,矿物组分含量可以利用自然伽马、声波时差、中子孔隙度曲线建立多参数模型得到。孔隙度以矿物组分为基础,结合密度曲线和体积模型,得到储层总孔隙度、有效孔隙度、可动流体孔隙度参数。通过新钻井岩性扫描及核磁共振提供的参数对比,验证了该方法的可靠性,为风西湖相复杂混积岩储层参数计算提供了新的方法。A breakthrough has been made in the exploration of the lacustrine complex mixed carbonate reservoir in Fengxi block of Qiadam basin,and the commercial oil productions are achieved.In recent years,conventional logs,FMI,CMR and litho-scanner logging data have been widely collected in new drilling targets.These data provide key parameters for reservoir evaluation,such as mineral composition,rock structure characteristics,porosity and so on.However,it is difficult to obtain accurate reservoir parameters for old wells which only measure conventional logging data,so other alternative methods need to be studied.Through sensitive curve analysis,mineral composition can be obtained by multi-parameter model based on gamma ray,compressional slowness and neutron porosity logs.Porosity is based on mineral composition,combined with bulk density and volume models to obtain the reservoir total porosity,effective porosity and movable fluid porosity parameters.The reliability of this method is verified by comparing the parameters provided by litho-scanner and CMR of new drilling.It provides a new method for calculating the parameters of lacustrine complex mixed rock reservoir in Fengxi block.

关 键 词：测井解释 柴达木盆地 复杂混积岩 矿物组分 总孔隙度 有效孔隙度 可动流体孔隙度 

分 类 号：P631.84[天文地球—地质矿产勘探]