摘要
针对水平井的稳态产能预测误差较大的问题,通过半解析耦合模型计算对比,发现在不同泄油体形态、水平垂直渗透率各向异性条件下,Joshi公式的误差变化规律:在厚油层、低垂向渗透率或短水平段情况下,预测值偏小约30%,在薄油层、长水平段或长条状泄流区情况下,预测值又偏高约30%。进一步利用半解析耦合模型计算出不同椭圆形泄流区条件下的水平井产能指数,通过SPSS统计软件进行非线性回归处理,获得水平井无因次产能指数预测相关式,相对误差控制在±1.5%范围内,显著提高水平井的产能预测精度。
There is greater error in steady productivity prediction of horizontal well,it is found out that,through semi-analytic coupling model calculation correlation,under the condition of different oil drainage shape and anisotropy of horizontal permeability,the error changing law of Joshi formula is that the expected value is 30% smaller under the condition of thick pay zone,low vertical permeability or short horizontal section,and the value will be 30% greater under the condition of thin pay zone,long horizontal section or elongated drainage area.Furthermore,the semi-analytic coupling model is employed to calculate the productivity index of horizontal well in different elliptic drainage area,non-linear regression is carried out by SPSS software,the non-dimentional productivity index prediction relation of horizontal well is obtained,the relative error is within ±1.5%,the prediction precise is enhanced considerably.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2008年第5期108-110,共3页
Journal of Southwest Petroleum University(Science & Technology Edition)
关键词
水平井
产能预测
相关式
horizontal well
productivity prediction
relational equation
