石油仪器
石油儀器
석유의기
PETROLEUM INSTRUMENTS
2015年
1期
72-74
,共3页
核测井%元素俘获谱%俘获伽马能谱%相对灵敏度%标准模拟井
覈測井%元素俘穫譜%俘穫伽馬能譜%相對靈敏度%標準模擬井
핵측정%원소부획보%부획가마능보%상대령민도%표준모의정
nuclear logging%element captured spectrum%captured gamma energy spectrum%the relative sensitivity factor%standard simula-tion well
地层元素俘获谱测井可直接、准确判断岩性,为识别复杂储层岩性、确定骨架密度、解释沉积环境、根据矿物组成计算孔隙度及渗透率等问题的解决提供了一种新的途径。而求取组成地层岩石的各元素相对灵敏度是地层元素俘获谱测井解释的关键所在。文章结合研制的地层元素俘获谱测井仪,用蒙特卡罗数值模拟的方法对其建立数值模型,并进行优化验证,得到理想的模型,进一步建立已知元素成分的刻度模拟井,计算得到硅、硫、钙、铁、钛、钆、氢和氯等元素的相对灵敏度,并与斯伦贝谢公司的地层元素测井仪的相对灵敏度比较分析,确定了可用于求解骨架元素含量计算的元素相对灵敏度,这一结果解决了元素俘获谱测井仪求解地层各元素含量分析过程中的技术难点。
地層元素俘穫譜測井可直接、準確判斷巖性,為識彆複雜儲層巖性、確定骨架密度、解釋沉積環境、根據礦物組成計算孔隙度及滲透率等問題的解決提供瞭一種新的途徑。而求取組成地層巖石的各元素相對靈敏度是地層元素俘穫譜測井解釋的關鍵所在。文章結閤研製的地層元素俘穫譜測井儀,用矇特卡囉數值模擬的方法對其建立數值模型,併進行優化驗證,得到理想的模型,進一步建立已知元素成分的刻度模擬井,計算得到硅、硫、鈣、鐵、鈦、釓、氫和氯等元素的相對靈敏度,併與斯倫貝謝公司的地層元素測井儀的相對靈敏度比較分析,確定瞭可用于求解骨架元素含量計算的元素相對靈敏度,這一結果解決瞭元素俘穫譜測井儀求解地層各元素含量分析過程中的技術難點。
지층원소부획보측정가직접、준학판단암성,위식별복잡저층암성、학정골가밀도、해석침적배경、근거광물조성계산공극도급삼투솔등문제적해결제공료일충신적도경。이구취조성지층암석적각원소상대령민도시지층원소부획보측정해석적관건소재。문장결합연제적지층원소부획보측정의,용몽특잡라수치모의적방법대기건립수치모형,병진행우화험증,득도이상적모형,진일보건립이지원소성분적각도모의정,계산득도규、류、개、철、태、구、경화록등원소적상대령민도,병여사륜패사공사적지층원소측정의적상대령민도비교분석,학정료가용우구해골가원소함량계산적원소상대령민도,저일결과해결료원소부획보측정의구해지층각원소함량분석과정중적기술난점。
Elemental capture spectroscopy log can directly and accurately determine complex lithology, which provides a new approach to i-dentifying complex lithology, determining the density of framework, interpreting the sedimentary environment, calculating porosity and per-meability according to the mineral composition. Measuring the relative sensitivity factor of lithology is the key to elemental capture spectros-copy log interpretation. In this paper, we established the model of the formation element captured spectrum logging tool with Monte Carlo method and by optimization obtained the ideal model. We also established the element standard simulation well to calculate and obtain the relative sensitivity factor of sulfur, calcium, silicon, iron, titanium, gadolinium, hydrogen, chlorine, and other elements. Compared with the relative sensitivity factor of Schlumberger elemental capture spectroscopy log,we obtained the relative sensitivity factor which can be used to calibrate the elemental weight fractions in data processing. This method solved the key problem of conversion from yield of each element to the weight fractions in the data processing.