煤层气多分支水平井井眼轨道优化设计模型  

Trajectory optimization design model of multi-branch horizontal well of coalbed methane

作　　者：李昌盛[1] 徐术国[1] 杨传书[1] 张强[1] 张成[1] 敬明旻[1] 

机构地区：[1]中国石化石油工程技术研究院,北京100101

出　　处：《煤田地质与勘探》2015年第2期48-52,57,共6页Coal Geology & Exploration

基　　金：中国石化"十二五"重点信息化项目(G11-MM-2011-080)

摘　　要：煤储层具有低压﹑低渗特征,致使煤层气开发困难,单井产量低;而多分支水平井能显著增加井筒与煤层的接触面积,提高单井产量,缩短经济回收期。为此,提出了煤层气多分支水平井井眼轨道优化设计准则和主水平井方位的选择方法,建立了煤层侧钻水平井井眼轨道优化设计模型,并将该模型用于鄂尔多斯盆地2号和10号煤层的煤层气多分支水平井井眼轨道优化设计。结果表明,该模型实现了以较短的井眼轨道进入目标靶点,保证了分支井眼的平滑度,对煤层气钻井设计具有重要的指导意义。Coal reservoirs have features of low pressure and low permeability, making exploitation difficult and-well yieldlow. However, multi-branch horizontal well may increase the contact area with the coal, enhance produc-tion and shorten the economic recovery period. Hence well trajectory optimization criterion of coalbed methane （CBM） multi-branch horizontal well is presented in this paper. In addition, authors established a trajectory optimal design model of the sidetrack horizontal well and then used sequential quadratic programming method （SQP）. Fi-nally well trajectory is planed by this model based on geological data in Zhengzhuang of Shanxi Province. The re-sults show that the model achieves optimization design of multi-branch horizontal wells of CBM and deserve somewhat consideration for guideline in the process of well design.

关 键 词：煤层气 侧钻水平井 井眼轨迹 优化算法 

分 类 号：TE243.9[石油与天然气工程—油气井工程] P618.13[天文地球—矿床学]