低渗透储层水平井-直井联合布井极限注采井距研究  

Study on Critical Well Spacing for Combination Patterns of Vertical and Horizontal Wells in the Low-permeability Reservoir

作　　者：侯晓春[1] 陆程[1] 蔡文[1] 郑兴范[2] 

机构地区：[1]中国地质大学能源学院,北京100083 [2]中国石油天然气股份有限公司油藏处,北京100011

出　　处：《现代地质》2008年第1期91-96,共6页Geoscience

基　　金：科技部基础研究项目(06-02A-02-01)

摘　　要：低渗透储层水平井—直井联合布井技术具有广泛的应用前景,其布井方式至关重要。首先利用劈分流场的方法直观地给出常规储层水平井—直井联合布井的产能评价方法;然后针对低渗透储层的渗流特点,在考虑启动压力梯度条件下建立新的井网渗流物理模型并求解得到产能评价公式;最后经分析计算给出启动压力梯度影响的面积井网极限注采井距关系曲线。研究结果为低渗透储层部署水平井—直井联合井网提供理论依据。It is clear that a combination spacing of vertical and horizontal wells is perspective to develop the reservoir with low permeability. However, the pattern of well spacing is a key technique to the combination. At first, in this paper solutions of productivity evaluation for the combination spacing are directly developed using split of flow fields; secondly aimed to the characteristics of the reservoir with low permeability, new physical models of well patterns and their production formulas are presented in the exist of the start-up pressure gradient; and finally, for the three typical combinations, curves of critical well spacing dominated by the start-up pressure gradient are figured based on related calculations. Results from the study can be used to guide practical combination placing of vertical and horizontal wells in the reservoir with low permeability in oilfields.

关 键 词：水平井-直井联合布井 劈分流场 启动压力梯度 极限注采井距 

分 类 号：TE348[石油与天然气工程—油气田开发工程]