分支参数对多分支水平井增产效果影响  

INFLUENCES OF THE BRANCH PARAMETERS OF MULTI-LATERAL HORIZONTAL WELLS ON THE WELL STIMULATION EFFECTS

作　　者：戴涛[1] 

机构地区：[1]中国石化胜利油田分公司地质科学研究院,山东东营257015

出　　处：《大庆石油地质与开发》2012年第6期114-118,共5页Petroleum Geology & Oilfield Development in Daqing

摘　　要：多分支水平井是增加单井产能的利器，但其增产效果受分支参数（分支长度、分支数目、分支井筒造斜率）影响。针对实际钻井轨迹特点，采用分支井筒在一定造斜率的条件下逐步向外展开的方法对多分支水平井进行建模，研究了分支参数对多分支水平井增产效果的影响。结果表明：主井筒对分支井筒的干扰是影响多分支水平井增产效果的主要原因；分支井筒造斜率越大，多分支水平井增产效果越好。为了达到增产效果，可以采用“长分支、少支数”或“短分支、多支数”的方法。Multi-lateral horizontal well is a critical measure to increase single-well productivity, but the stimulation effects are severely influenced by the branch parameters （ such as branch length, branch number, branch deflection rate）. According to the characteristics of practical drilling trajectory, the well model is established based on the method of gradually stretching of the branch holes under a certain deflection rate, and furthermore the impacts of the branch parameters on the effects of well stimulation are studied. The results show that the interference of the main hole with the branch holes is the main reason to decrease the effects ; the larger the deflection rate is, the bet- ter stimulation effects will be won. In order to obtain much better stimulation effects, the methods of ＂ longer branch, fewer branches＂ or ＂ shorter branch, more branches＂ must he adopted.

关 键 词：多分支水平井 造斜率 分支参数 产能 

分 类 号：TE355.6[石油与天然气工程—油气田开发工程]