大庆石油地质与开发2025，Vol.44Issue(2)：99-109,11.DOI:10.19597/J.ISSN.1000-3754.202401009
应用新型产能模拟法确定气藏动态渗透率下限
Determining dynamic cutoff of gas reservoir permeability by novel productivity simulation method:A case study of intra-platform reservoir of 4th Member in Dengying Formation of Anyue gas field in Sichuan Basin
摘要
Abstract
Accurate determination of reservoir property cutoff is a key task in realizing precise reserves assessment and scale-beneficial development of intra-platform carbonate gas reservoirs in Dengying Formation of Anyue gas field in Sichuan Basin.However,the lack of core analysis data and production test data in this block hinders accu-rate assessment of reservoir property cutoff by traditional methods.Therefore,a novel productivity simulation meth-od is established,comprehensively considering stress sensitivity,slippage effect,threshold pressure gradient,gas viscosity and compressibility factor variation.Simultaneously,experiment to determine threshold pressure gradient,stress sensitivity coefficient and slippage factor is performed,as well as core productivity simulation experiment at original reservoir temperature and pressure.Finally,core flow rate is converted to gas well production using produc-tion conversion criteria to obtain reservoir permeability cutoff at different boundary pressures and different produc-tion pressure differences.Calculation results of novel productivity simulation method show that gas reservoir permea-bility cutoff varies dynamically in different development stages,continuously increasing with boundary pressure of gas reservoir decrease.Taking net pay thickness of 36 m and gas well production pressure difference of 6 MPa as an example,the permeability cutoff for economically beneficial development of intra-platform reservoir in 4th Member of Dengying Formation in Anyue gas field is evaluated to be 0.05×10-3 µm2,providing guiding significance for as-sessment of producing reserves in intra-platform area and subsequent area selection for wells deployment.关键词
深层碳酸盐岩气藏/安岳气田/灯影组/台内区/产能模拟法/储层物性下限Key words
deep carbonate gas reservoir/Anyue gas field/Dengying Formation/intra-platform area/productivity simulation method/reservoir property cutoff分类
能源科技引用本文复制引用
胡江涛,田乐娆,杨胜来,毕露霏,闫海军,邓惠,王梦雨,李佳峻,李沛耘,刘新月..应用新型产能模拟法确定气藏动态渗透率下限[J].大庆石油地质与开发,2025,44(2):99-109,11.基金项目
中国石油天然气股份有限公司"十四五"前瞻性基础性科技项目"风化壳型碳酸盐岩气藏提高采收率技术研究"(2021DJ1504) （2021DJ1504）
四川省自然科学基金项目"超高压特低孔强非均质碳酸盐岩气藏有效储层物性下限研究"(2023NSFSC0261). （2023NSFSC0261）
