大宛齐油田是一个滚动开发的高非均质性复杂砂岩油藏，原油产量逐年上升，因此无法直接用常规方法分析其产量递减规律。采用了2种不同的研究方法，实例证明油井投产时间平移法可较好地满足研究条件，得出较为可靠的产量递减曲线。该方法为研究同类型油田提供了有价值的借鉴。

Because of the great change in thickness of the overlying gyprock and the high density drilling fluid in Kuqa depression, it is very difficult to define the boundary stratotype. TDC are used in exploration wells and the temperature at the bottom of well can be measured continuously and the natural gas reservoirs of Eogene-Cretaceous are high pressure reservoirs. Based on this situation and according to the cause and feature of the abnormal high temperature in the natural gas reservoir, we inspected the formation temperature continuously and predicted correctly the change of the formation, defined the boundary stratotype, found the trace of gas and solved the difficulty in work.