Sequence Stratigraphy Study Of Low Permian System In Hetian Area Xinjiang

Hetian area is one of the most important prospect regions for shengli oilfield in the near future. From the north to the south, it can be cut into two parts:the southern outcrop area and the northern covered area. An integrated exploration study has been done during the Past three years that includes seismic, gravity, electricity, geology etc. A lot of data has been gotten.This paper established the single well's isochronous sequence stratigraphy framework with well log sequence stratigraphy analysis making use of sequence stratigraphy theory. I integrate the well log and seismic section with synthesize seismogram, so we can use seismostratigraphy to analyze seismic sequence. I obtain some important conclusions :1. I use sequence stratigraphy to analyze Macan 1 well and Shenghe 2 well's sequence character. I measure off three third class sequence for Low Permian System in Hetian Xinjiang. That is SSl(Low Permian System early stage), SS2(Low Permian System middle stage), SS3(Low Permian System last stage).2. I integrate the well log and seismic section with synthesize seismogram, so we can use seismostratigraphy to analyse seismic sequence. I select several typical seismic sections(ht96180-l, ht96222, ht96568, ht96536, ht96520) to analyze seismostratigraphy.3. I analyze seismic phase and forecast deposition phase using seismic phase analysis theory. On this base I summarize this area's deposition pattern and establish sequence stratigraphy mode.4. I summarize the trap' s station in the sequence stratigraphy framework.