CAJ | 학술논문

在含油气的泥质砂岩储层中，密度、中子和声波时差测井曲线受天然气的影响很大，直接通过岩心刻度计算的孔隙度有较大的误差。以校正油气对三孔隙度测井影响为核心思想的SAND2程序在实际应用中很不完善，为此，针对实际地区，对SAND2程序做了4点修改：添加了井眼扩径对测井曲线校正的方法；用岩心刻度方法计算出的泥质含量作为固定值，减少迭代次数；油气密度的估算方法改为Poupon等人提出的计算方法；添加了储层段和非储层段（泥岩）的参数的约束条件。运用该方法编制的处理模块对研究地区的10口井进行了实际处理，经验证能较好解决该地区受气层影响的储层孔隙度计算问题。
재함유기적니질사암저층중，밀도、중자화성파시차측정곡선수천연기적영향흔대，직접통과암심각도계산적공극도유교대적오차。이교정유기대삼공극도측정영향위핵심사상적SAND2정서재실제응용중흔불완선，위차，침대실제지구，대SAND2정서주료4점수개：첨가료정안확경대측정곡선교정적방법；용암심각도방법계산출적니질함량작위고정치，감소질대차수；유기밀도적고산방법개위Poupon등인제출적계산방법；첨가료저층단화비저층단（니암）적삼수적약속조건。운용해방법편제적처리모괴대연구지구적10구정진행료실제처리，경험증능교호해결해지구수기층영향적저층공극도계산문제。
As natural gas has a great impact on density , neutron and AC logs in shaly sand reservoir , it is hard to get exact porosity from core scale calculation .The key of SAND2 program could calibrate errors caused by those affections . Some new functions have been put into the prior defective program , such as using hole size elongation to calibrate the logs;taking the shale content got from core scale calculation as a fixed parameter to reduce iterative times ;using methods sugges-ted from Poupon to estimate the hydrocarbon density;adding restrictions from shale parameters of reservoir and nonreser-voir.And the new program has been proved to work well after being used in ten wells in the work area .