摘要
水平段长度是气藏水平井开发中最重要的技术政策指标之一,前人多从无阻流量、累产气等技术方面研究其合理性,而在油气价格持续低迷的情况下,水平段的设计须考虑经济效益。以A国海上Cn气藏为研究对象,以油气藏数值模拟为预测手段,开展了不同水平段长度的产量剖面数值模拟预测,围绕单井寿命期内的投入产出,建立了考虑不同钻井长度的单井经济效益评价模型,研究了不同水平段长度下的收益净现值,给出了Cn气藏最优经济效益的水平段长度在200~250 m。
For gas reservoirs, the length of horizontal section is one of the most important technological indexes in horizontal-well development. Previous study mostly focused on the validity of both open flow capacity and cumulative gas production. But now, under the tendency of prolonged and low oil and gas price, economical benefits should be taken into consideration in a design of horizontal section. Taking Cn gas reservoirs in offshore Country A as examples and also serving numerical simulation as a prediction tool, we first developed the numerical simulation of production profile for different lengths of horizontal section, and then established the model considering different drilling lengths to evaluate economic benefits of single well; thirdly analyzed the net present value(NPV)under different horizontal-section lengths; finally, proposed that the optimum and economical horizontal-section length should vary from 200 m to 250 m.
出处
《天然气技术与经济》
2017年第4期24-25,39,共3页
Natural Gas Technology and Economy
关键词
气藏
水平井
水平段长度
经济评价模型
gas reservoir
horizontal well
length of horizontal section
economical evaluation model
