摘要
为解决Δlog R方法应用于沉积环境较复杂的陆相页岩气储层精度低的问题,以四川盆地D地区X组陆相页岩气储层为研究对象,分析陆相页岩气与海相页岩气储层在测井响应上的主要差异原因,将去铀伽马曲线计算的相对黏土质量分数作为电阻率校正因子,在低成熟度环境下拟合声波时差转化系数,建立一种加入电阻率校正因子、优化声波时差转化系数的改进Δlog R模型。应用结果表明:改进Δlog R模型能够大幅提高Δlog R模型的预测精度,且具有较好的推广性和适用性。该结果为四川盆地D地区陆相页岩气储层总有机碳质量分数计算提供参考。
The depositional environment of continental shale gas reservoirs is complex,and the traditionalΔlog R method has poor application effect.Taking the X Formation continental shale gas reservoir in D Area of Sichuan Basin as the research object,we analyzed the main reasons for the difference in logging response between the continental and the marine shale gas reservoir.For the low-resistivity phenomenon and low-maturity environment of the reservoir caused by the high clay content in the study area,an improvedΔlog R model is proposed that adds a resistivity correction factor and optimizes the acoustic time difference conversion coefficient.The results show that the improved model can greatly improve the prediction accuracy of theΔlog R model,and it has good generalization and applicability.It provides a new method for calculating the total organic carbon content of continental shale gas reservoirs in D area of Sichuan Basin.
作者
罗意淳
张超谟
张占松
石文睿
刘伟男
周雪晴
张亚男
LUO Yichun;ZHANG Chaomo;ZHANG Zhansong;SHI Wenrui;LIU Weinan;ZHOU Xueqing;ZHANG Yanan(Key Laboratory of Exploration Technologies for OU and Gas Resources,Ministry of Education,Yangtze University,Wuhan,Hubei 430100,China;Shenzhen Branch of CNOOC,Shenzhen,Guangdong 518054,China;Institute of Deep-sea Science and Engineering,Chinese Academy of Science,Sanya,Hainan 572000,China)
出处
《东北石油大学学报》
CAS
北大核心
2021年第6期80-89,I0006,共11页
Journal of Northeast Petroleum University
基金
油气资源与勘探技术教育部重点实验室(长江大学)开放基金资助项目(K2021-08)
国家科技重大专项(2016ZX05038-006)
油气资源与勘探技术教育部重点实验室(长江大学)开放基金资助项目(K2021-03)。
关键词
四川盆地
陆相
页岩气
总有机碳质量分数
改进Δlog
R方法
低电阻率校正
声波时差转化系数
Sichuan Basin
continental
shale gas
total organic carbon mass fraction
improved Δlog R method
low-resistivity correction
acoustic time difference conversion coefficient
