摘要
本文分析了抽油井用液面计算压力的两种方法后指出:混和法采用一段流体计算井底静压,即用大庆地区的松Ⅰ法推算地层压力,而用三段流体计算流压,这是逻辑上的矛盾。在计算流压时,未区分泡沫液面,因而计算值偏高,甚至高于地层压力。地层压力计算值误差太大的原因,主要不在于松Ⅰ法,而是建立的一段流体状态数学模型不符合油井情况,及取用的流体相对密度不合理等造成。“液面在井口不计算压力”不合理。应该推广系统法计算压力。
<ABSTRACT> This paper analyzes two methods of calculating pressure from fluid level in pumping wells and shows that one-section fluid is used to calc ulate static bottom hole pressure, i.e. using Song I Method of Daqing to calcu late formation pressure, and three-section fluid is used to calculate flowing pre ssure.This is logically a contradiction.In calculating flowing pressure, level of foam is not distingnished, therefore, calculated value is high, even higher than the formation pressure. The reason of high valves in calculating formtion pressure is not because of the Song I method, but it is because of the numerical simulation model of one section fluid is not in concordance with the oil well status and the relative density of fluid used is unreasonabld.It is unreasonable not to calculate the pressure if the fluid level reaches the well head. Systems approach should be spreaded for calculating pressure.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
1990年第4期47-56,共10页
Petroleum Geology & Oilfield Development in Daqing
关键词
油井
液面
压力
计算法
: pressure calculation, mechanical oil production, flowing pressure,formation pressure, relative density of fluid, build-up type-curves
