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
孙爱艳 1梁忠奎 1崔建 1卢家亭 1闫长青2
作者信息
- 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
- 折叠
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.
Abstract
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 water flooded 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Key words
water flooded layer/spontaneous potential/drilling mud design/Nanpu Sag引用本文复制引用
出版年
2024
NETL
NSTL
万方数据