元坝长兴组储层孔隙度计算方法研究  

Study on calculation method of reservoir porosity of Changxing Formation in Yuanba

作　　者：杨杰 颜晓 任世林[1] 陈兰 Yang Jie;Yan Xiao;Ren Shilin;Chen Lan(Exploration and Development Research Institute of Sinopec Southwest Oil and Gas Company,Chengdu 610041)

机构地区：[1]中石化西南油气分公司勘探开发研究院,四川成都610041

出　　处：《石化技术》2020年第12期108-110,共3页Petrochemical Industry Technology

基　　金：国家重大专项“超深层生物礁底水气藏高效开发技术”(编号:2016ZX05017-005)。

摘　　要：元坝长兴组储层非均质强,孔隙度低,孔、洞、缝发育,矿物成分复杂,测井响应非线性突出,三孔隙度测井曲线受此影响大。利用单一孔隙度测井曲线与岩心分析孔隙度拟合关系不能有效解决孔隙度计算问题。本文结合元坝长兴组储层实际地质特征,对比分析利用Wyllie、Musher、Raymer、Raiga-Clemenceau、李宁和中子~密度交汇等方法计算孔隙度存在的问题,利用声波、中子、密度测井曲线联立方程组,并对声波和中子测井进行非线性校正,建立新的计算模型,与实际岩心分析资料对比,计算精度有较大提高,为碳酸盐岩储层孔隙度计算提供了一种新的方法。The Changxing Formation in Yuanba is characterized by strong heterogeneity,low porosity,well-developed pores,vugs and fractures,and complex mineral composition,The logging response is non-linear,and the three porosity logging curve is greatly affected by this.Using single porosity logging curve and core analysis porosity fitting relationship can not effectively solve the problem of porosity calculation.Based on the actual geological characteristics of Changxing Formation in Yuanba,this paper compares and analyzes the problems existing in porosity calculation by Wyllie,musher,Raymer,raiga Clemenceau,Li Ning and neutron density intersection,The acoustic,neutron and density logging curves are used to establish equations,and the nonlinear correction of acoustic and neutron logging is carried out,Compared with the actual core analysis data,the calculation accuracy of the new calculation model is greatly improved,which provides a new method for calculating the porosity of carbonate reservoir.

关 键 词：元坝气田 碳酸盐岩储层 孔隙度 声波测井 多矿物模型 

分 类 号：P618.13[天文地球—矿床学]