油气井测试
油氣井測試
유기정측시
WELL TESTING
2001年
2期
1-3
,共3页
非均质油气藏%渗透率%Gamma分布%极大似然法
非均質油氣藏%滲透率%Gamma分佈%極大似然法
비균질유기장%삼투솔%Gamma분포%겁대사연법
heterogeneous reservoir%permeability%Gamma distribution%maximum likelihood method
依据Gamma函数及Г(x)分布的基本概念,给出了非均质性储层渗透率K的概率密度、分布函数以及基本数字特征的表达式。同时,应用极大似然估计法推导出Г(x)型分布未知参数估 计值和k0的解析式。并结合属中低渗透性的临南油田沙三中油层的电测解释资料进行了实例 计算,其结果与实际吻合,可作为编制油田开发方案和产能预测的依据。
依據Gamma函數及Г(x)分佈的基本概唸,給齣瞭非均質性儲層滲透率K的概率密度、分佈函數以及基本數字特徵的錶達式。同時,應用極大似然估計法推導齣Г(x)型分佈未知參數估 計值和k0的解析式。併結閤屬中低滲透性的臨南油田沙三中油層的電測解釋資料進行瞭實例 計算,其結果與實際吻閤,可作為編製油田開髮方案和產能預測的依據。
의거Gamma함수급Г(x)분포적기본개념,급출료비균질성저층삼투솔K적개솔밀도、분포함수이급기본수자특정적표체식。동시,응용겁대사연고계법추도출Г(x)형분포미지삼수고 계치화k0적해석식。병결합속중저삼투성적림남유전사삼중유층적전측해석자료진행료실례 계산,기결과여실제문합,가작위편제유전개발방안화산능예측적의거。
According to the basic concept of Gamma function andГ'(x)distribution, this paper gives out some expression including probability density, distribution function and basic numeric characteristic value. Application of the maximum-likelihood es timation method, the paper derives analytic formulae of unknown parameter estimation value and k0. The application of log data of middle of the third segment in linnan oilfield, we calculate its permeability. The result is right. The result pro rides the basis for programming oilfield development plan and forecasting productivity.