低渗透油藏产能主要影响因素分析与评价

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1、文章编号：0253-2697^012)03-0437-05低渗透油藏储层分级评价方法及应用张仲宏I杨正明2刘先贵2熊伟2王学武2(•中国地质大学能源学院北京iooo83：2•中国石汕勘探开发研究院廊坊分院河北廊坊065007)摘要低渗透石油探明储量逐年增加，低渗透油藏未动用储量占未动用总储量的比例较高。笔者在长庆、大庆外圉、吉林和华北等油区2200块岩心分析的棊础上，结合几个低渗透油区的开发现状，提出了用主流喉道半径、可动流体百分数、拟启动压力梯度、原油黏度和黏土矿物含虽作为评价参数，确定了各表征参数的分类界限，对比了儿个低渗透油区储层农征参数数据的差异，深化了対低渗透

2、储层的认识，捉出了低渗透油区储层综合评价方法“研究表明，储层分类系数与区块单井产能有较好的相关关系。在此期础上，对长庆、大庆、吉林油田3大低渗透油区进行储层分类评价，确定了各油区不同分类级别所对应的渗透率范围。该项研究將对优选产能建设区块和确定投资具有指导意义，并为确定下步低渗透油藏攻关目标、技术对策及动用界限提供技术支撑。关键词：低渗透油藏微观孔隙结构；储层分级评价；评价参数；岩心分析中图分类号：TE311文献标识码：AAgradingevaluationmethodforlow-permeabilityreservoirsanditsapplicationZHANG

3、Zhonghong1YANGZhengming2LIUXiangui2XIONGWei2WANGXuewu2(.SchoolofEnergyResources-ChinaUniversityofGeo6cienoes・Beijing100083-China:2.LangfangBranch,PetroChinaResearchInstituteofPetroleumExploration&Development-Langfang065007，China)Abstract:Thedemonstratedreservesoflow-permeabilityreservoir

4、sinChinaincreaseyearbyyear.Thenon-producingreservesofIcw・permeabilityreservoirsamounttoarelativelyhighpercentageoftheallnon-producingreservesinChina.Basedonthegeochemi-calaralysisof2200coresamplescollectedfromtheperipheralzoneoftheDaqingoilregion,theChangqing.JilinandHuabeioilre-gionsand

5、integratedwiththecurrentsituationofseveralmajorlow-permeabilityreservoirsdevelopedbyPetroChinaCompanyLimit-ed・weproposedanumberofparameterstoevaluatelow-permeabilityreservoirs,suchastheradiusofmainflowthroat,percentageofmovablefuid・thresholdpressuregradient・viscosityofoilandcontentofclay

6、minerals.Meanwhile-theclassificationlimitofva・「iouscharacterizationparametersweredeterminedanddifferencesintheseparametersforthemainlow-permeabilityreservoirswerecompared,whichhasdeepenedourunderstandingaboutlow-permeabilityreservoirs.Thus・acomprehensiveevaluationmethodforlow-permeabilit

7、yreservoirswasproposed・Theresultshowsthatthecorrelativitybetweenreservoirclassificationcoefficientsandthedeliverabilityofasingleoilwellisguitegood・Basedonthesedata・wecarriedoutareservoirclassificationevaluationonlow・permeabilityreserversintheChangqing，DaqingandJilinoilreg