考虑井斜影响的整体压裂产能预测  

PRODUCTIVITY PREDICTION OF OVERALL HYDRAULIC FRACTURING CONSIDERING THE INFLUENCES OF BOREHOLE DEVIATION

作　　者：韩秀玲[1] 张士诚[2] 马新仿[2] 曹砚锋 卞晓冰[2] 

机构地区：[1]中石油勘探开发研究院,北京100083 [2]中国石油大学石油工程教育部重点实验室,北京102249 [3]中海油研究总院,北京100027

出　　处：《大庆石油地质与开发》2012年第2期125-128,共4页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家重大专项“海上稠油油田压裂充填开发技术研究”（2008ZX05024-03-003-004）资助.

摘　　要：随着定向井、丛式井和大斜度井的钻探数量逐渐增多，整体压裂产能预测模型已不适应现场实际情况，有必要研究井斜对整体压裂产能预测的影响。考虑油水两相条件下，采用等效直井方法，建立考虑井斜影响的规则井网整体压裂产能预测数学模型，并且井斜角不超过45°。该模型可以分析规则井网整体压裂中的井斜对拟表皮系数和产能的影响。对规则井网的整体压裂设计进行优化模拟，模拟结果表明，在低渗透油藏中，油层厚度一定，随着井斜角度的增加，拟表皮系数逐渐降低，整体压裂后日产量逐渐增大；井斜角越大，拟表皮系数越小，油层厚度等的变化对整体压裂后产能影响也越大。井斜对低渗透油层压裂井有显著影响，压裂设计应给予充分认识。With the gradual increase of directional, cluster and highly deviated exploration well numbers, the cur- rent productivity predicting models of overall hydraulic fracturing are hardly adapted with the actual requirements~ thus it is necessary to study the influences of the deviation on the prediction. Considering two phases of oil and wa- ter, by using the method of equivalent vertical wells, the mathematic productivity-predicting model that considers the influences for the overall hydraulic fracturing in regular well pattern has been established and the deviation an- gle does not exceed 45 ~. The impacts of the borehole deviation on the pseudoskin factor and productivity of the a- bove fracturing can be analyzed and furthermore the optimized design and simulation of the overall fracturing for the regular well pattern have been carried out. The results of the above simulation show that in low-permeability oil res- ervoirs if the formation thickness is certain, with the increase of the inclination angle of the wells, skin factor de- creases and daily oil production increases gradually after overall fracturing; the larger the deviation angle and the smaller the skin factor, the more serious influences of the reservoir thickness changes and so forth on the productivity of overall fracturing. In a word, the impacts of the borehole deviation on the fractured Well in low-permeability oil reservoirs are obvious, so they should be completely understood and considered in the fracturing design.

关 键 词：低渗透 井斜 规则井网 产能预测 

分 类 号：TE357.11[石油与天然气工程—油气田开发工程]