准噶尔盆地车排子地区沙湾组“断-毯”输导性量化评价

QUANTITATIVE ASSESSMENT OF THE FAULT-SANDBODY TRASPORTABILITY FOR SHAWAN-FORMATION IN CHEPAIZI AREA OF JUNGGAR BASIN

依据断层生长指数、断层上下盘岩矿特征、油气性质对比分析等明确了断层的垂向输导性能,通过砂体物性条件、荧光定量评价特征等刻画了砂体横向输导性。结果表明:车排子地区断层垂向输导指数大于1时,具有垂向输导作用;当砂体输导指数大于2时,油气具有横向输导能力;在实际地质条件下,油气只有同时满足断层、砂体有效输导条件才能进行长距离运移;建立了断层、砂体输导数学模型,结合油气分布提出了断层和砂体的有效输导下限。

With the help of the contrasts and analyses of the fault growth indexes,rock-mineral characteristics of upper and lower walls of the fault,petroleum properties and so on,the vertical transportabilities of the faults were made clear,through quantitatively evaluating the physical properties of the sandbodies,fluorescent features and so forth,the horizontal transportabilities of the sandbodies were characterized. The achievements show that when the vertical transport index is more than one for the faults in Chepaizi area,there is a certain vertical transportation;while the sandbody index is larger than two,the hydrocarbon possesses the horizontal transportability; under the actual geological conditions,the petroleum only simultaneously meets the requirements of the effective transportation for both the faults and sandbodies,the long distance migration can be expected; by means of establishing the mathematical transporting models of the faults and sandbodies,integrating with the hydrocarbon distributions,the lower limits of the effective transportation of the faults and sandbodies are presented.