检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]西南石油大学石油与天然气工程学院,成都610500 [2]中国石油新疆油田分公司准东采油厂,新疆阜康831511
出 处:《新疆石油地质》2016年第5期556-560,共5页Xinjiang Petroleum Geology
基 金:国家科技重大专项(2011ZX05030-005-06)
摘 要:用物质平衡法计算气藏动态储量是目前最常用的一种方法,但是对于带油环的凝析气藏,其动态储量不仅与产油量和产气量有关,还和反凝析程度有关。研究发现,不同类型的产出物之间存在质量转换,且转化量很难确定,难以用体积平衡或摩尔量平衡来建立物质平衡方程;生产井井口产油量、产气量与相应的井底产油量、产气量不能用体积系数直接转换,也不能用气油比得出气与油的量,其物质平衡方程与常规气藏相比,有较大差别。根据质量守恒定理,建立了天然水驱的带油环的凝析气藏在开采条件下的物质平衡方程通式,应用多相流驱替理论及曲线插值相应的含油饱和度,通过非线性回归并最优化目标函数,得到带油环的凝析气藏动态储量。不需要采用经验公式将凝析油折算为等价气体,不需要引入两相偏差系数以及液体状态方程等概念,避免了考虑复杂相态变化引起的油、气组分及体积变化。得出的物质平衡方程的理论基础更强,更符合凝析气藏的实际情况。Material balance equation is one of the most commonly-used methods to calculate dynamic reserves of gas reservoirs, but for condensate gas reservoirs with oil rings, their dynamic reserves are not only related to oil and gas production, but also to retrograde condensation degree. Since mass conversion occurs among different products, it is difficult to accurately calculate the amount of conversions and to establish material balance equation with volume balance or molar balance. Also, conversion from wellhead oil and gas flow rate to bottom-hole inflow rate can’t be realized by the direct use of the volume factor and the gas-oil ratio, hence the material balance equation for conventional gas reservoirs greatly differs from that for condensate gas reservoirs with oil rings. On the basis of the law of mass conservation, this paper proposes a general formula of the material balance equation for natural water-drive condensate gas reservoirs with oil rings under production conditions, in which multi-phase flow displacement theory and oil saturations corresponding to curve interpolation are used to get the dynamic reserves of such reservoirs with oil rings by optimizing the objective function through non-linear regression, without converting condensate oil into equivalent gas with empirical formula and without by means of concepts of two-phase deviation factor and state equation of liquid. Therefore, the new formula can avoid the variations in oil and gas components and their volumes resulted from complicated phase changes. The obtained material balance equation has a stronger theoretical foundation and can better reflect the actual status of condensate gas reservoirs.
分 类 号:TE15[石油与天然气工程—油气勘探]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.13