高含水期五点法井网压裂开发经济界限研究方法

Research Method on Economic Limits of Fracturing Development on Five-spot Well Pattern at a High Water Cut Stage

高含水期直井压裂开发的经济界限研究对压裂实施的经济可行性研究具有重要作用。基于前人研究成果,在考虑产出水处理费用影响的基础上,运用盈亏平衡原理,给出了高含水期直井压裂的经济界限研究方法。并以大庆油田杏六区为原型,在压裂有效期为1年的基础上,确定了直井实施压裂改造的有效经济厚度、有效经济渗透率及油价经济界限,并制作了实用图版。结果表明:在当前油价下,杏六区高含水期直井压裂能实现经济开采;压裂规模越小,油藏经济界限参数(有效经济厚度、有效经济渗透率)越大;油价越低,油藏经济界限参数(有效经济厚度、有效经济渗透率)越大。

The study of the economic limits of the development of fractured well at the high water cut stage provides an important theoretical basis for the feasibility of fracturing measures.With the breakeven principle and taking the effect of the costs of water treatment on economic into consideration,the research method of economic limit of fracturing in a high water cut stage is given.Taking Xing-6 area of Daqing Oilfield as an example,the effective economic thickness,the effective economic permeability and the boundary value of the oil price in the development of the fracturing vertical well are determined and some practical plates are drawled.The results show that under the current oil price,vertical well of Xing 6 area at high water cut stage can realize fracturing economic exploitation.The smaller the fracturing scale,the larger the effective economic thickness limit and permeability are.The lower the oil price are,the larger the effective economic thickness limit and permeability are.