基于钻井泥浆优化设计水淹层识别技术研究  

Research on identification technology of Water flooded zone based on drilling mud optimization design

作　　者：孙爱艳[1] 梁忠奎[1] 崔建[1] 卢家亭[1] 闫长青[2] Sun Aiyan;Liang ZhongKui;CuijianLu Jiating;Yan Changqing(Research Institute of Exploration and Development,Jidong Oilfield Company,PetroChina,Tangshan 063004;Exploration Development and construction Engineering Division of Petrochina Jidong Oilfield,Tangshan 063004)

机构地区：[1]中国石油冀东油田分公司勘探开发研究院,河北唐山063004 [2]中国石油冀东油田分公司勘探开发建设监督中心,河北唐山063004

出　　处：《石化技术》2024年第5期91-93,共3页Petrochemical Industry Technology

摘　　要：南堡凹陷深层岩性复杂、物性、含油性变化大,油气层测井特征非常复杂,识别难度大。注淡水开发加剧了储层水性的复杂程度,电性特征更加复杂,以电阻率-孔隙度为主的常规测井系列水淹层定性识别技术具有较大的局限性。由于自然电位测井正幅度差异能够有效指示储层水性变化,通过控制钻井泥浆矿化度,使自然电位在油层处呈现较小或微幅度正差异,在水淹层处呈现较大幅度正差异来指示储层水性变化,突出水淹层、识别隐蔽油气层。现场应用实践表明,通过合理控制钻井泥浆矿化度,利用自然电位正幅度差异指示储层水性变化,能够对水淹层及隐蔽油气层进行识别,取得了良好应用效果。For the deep strata of Nanpu Sag,the lithology is complex,the physical properties and oilness changes greatly and the logging characteristics of oil and gas reservoir are very complex,it’s difficult to identify.the development of fresh water injection aggravates the complexity of reservoir water property,the electrical characteristics are more complex,qualitative identification technology of waterflooded layer in conventional logging which based on resistivity and porosity has great limitations.Positive amplitude difference of spontaneous potential logging can indicate the change of reservoir water property effectively,by controlling the salinity of mud,make the spontaneous potential showed a small or micro positive difference at oil layer and a large positive difference at water flooded layer,to indicate the change of reservoir water property,outburst water flooded layer and identify subtle reservoirs.Field application shows that through reasonable drilling mud design,using positive amplitude difference of spontaneous potential to indicate reservoir water property change,can identify water flooded layer and subtle reservoirs,and good results have been achieved.

关 键 词：水淹层 自然电位 钻井泥浆设计 南堡凹陷 

分 类 号：TE3[石油与天然气工程—油气田开发工程]