深层凝析气藏单井控制地质储量下限研究

我国东部气田近几年探明深层凝析气藏的储量规模越来越大，但气藏开发技术难度大、工艺复杂，使开发风险增大。开发好深层凝析气藏的关键之一就是要确定气藏单井控制地质储量下限，指导开发井位部署，优化井位设计，提高其经济开发效益。以东濮凹陷深层凝析气藏为例，综合应用气藏工程理论和现金流量法，对深层凝析气藏单井经济可采储量和控制地质储量下限进行了研究，在此基础上对影响气藏单井控制地质储量下限的因素进行了分析，认为气藏单井控制地质储量下限与气藏单井产能、天然气价格、凝析油含量呈幂指数递减规律，与井深呈指数递增关系。

A Study of Single Well-Controlled Economic Limit Reserves of Deep Condensate Gas Reservoir

In recent years, the proved gas reserves of deep condensate gas reservoirs in the eastern gas fields of China are growing larger and larger. However, development of this kind of gas reservoirs is faced up with high technical difficulties, complicated production practices and high risks. One of the keys to development of deep condensate gas reservoirs is calculating single well-controlled economic limit reserves, which can be used to guide deployment of development wells, to optimize design of well position and to improve economic benefits. Taking the deep condensate gas reservoirs in Dongpu sag as examples, gas reservoir engineering theory and cash flow method are integrated for the first time to estimate single well economic limit recoverable reserves and controlled economic limit reserves of deep condensate gas reservoirs. The factors that influence single well-controlled economic limit reserves are analyzed. It is believed that single well-controlled economic limit reserves are in exponential decline with single well productivity, gas price and content of condensate oil, while in exponential increase with well depth.