论文部分内容阅读
机采井油套环空的流体分布是一定油井生产条件的函数。一般说来,有三种情况:①液面的位置在油层或接近于油层,套管气体可能产生或不可能产生;②液面在油层上面并且不产生套管气;③液面在油层之上,并产生套管气。对于第一和第二种情况,液面的计算取决于套压的测定、液体的特性(如密度等)和液面的位置。对于第三种情况,则包括了由于环空气体流动所产生的不确定的气态压力梯度。这种条件归结于一种气态液柱。在稳定生产条件下,油套环空中,原油里的饱和气将向上
The fluid distribution in the wellbore casing is a function of the well production conditions. In general, there are three situations: ① the surface of the liquid level is close to the reservoir or the oil layer, the casing gas may or may not be generated; ② the liquid level above the reservoir and does not produce casing gas; ③ liquid level above the reservoir , And produce casing gas. For the first and second cases, the calculation of the liquid level depends on the determination of the set pressure, the characteristics of the liquid (such as density, etc.) and the position of the liquid level. For the third case, the uncertain gas pressure gradient due to the flow of annulus gas is included. This condition is due to a gaseous liquid column. Under steady production conditions, the saturated gas in the crude oil will go upward in the oil loop