论文部分内容阅读
夹层主要是指储层内部不渗透或低渗透,能够对油气的流动、运移或聚集产生控制作用的条带。在天然气运移过程中,若夹层的毛细管突破压力小于下部储层的毛细管饱和压力,天然气会在下部储层还未达到含气饱和的时候通过夹层向上部储层运移,造成下部储层含有可动水。夹层与储层相互叠置会形成多个不饱和含气储层。此类气藏要形成纯气藏的重要因素是圈闭足够高大,进而增加气对原始地层水的排驱压力。大邑地区须家河组储层致密,非均质性强,须二段及须三段均含有不等厚致密夹层,气藏高度大于圈闭高度,夹层控气作用造成大邑气藏无边底水、气水过渡带长、高含水饱和度、普遍气水同出、含气丰度偏低、地层压力接近常压等特点,在此基础上对大邑地区须家河组气、水分布规律进行初步分析。
Mezzanine mainly refers to the reservoir within the impermeable or low permeability, the flow of oil and gas, migration or aggregation of the control effect of the band. During the migration of natural gas, if the breakthrough capillary pressure of the interlayer is less than the capillary saturation pressure of the lower reservoir, the natural gas will migrate through the interlayer to the upper reservoir before the lower reservoir reaches the gas saturation, resulting in the lower reservoir containing Movable water. Sandwiches and reservoirs overlap each other to form multiple unsaturated gas reservoirs. An important factor in the formation of a pure gas reservoir in such a gas reservoir is that the trap is sufficiently large to increase the pressure of gas drainage on the original formation water. The reservoir of Xujiahe Formation in Dayi area is dense and heterogeneous. The second and third member of Xujiahe Formation contain unequal thickness of tight interbeds. The height of the gas pool is greater than the height of the trap. Bottom water, long transition zone of gas and water, high water saturation, common gas and water, low gas abundance and stratigraphic pressure close to atmospheric pressure. On this basis, Distribution of the initial analysis.