Spread Research Suge Li Gas Field Called Block 51 Upper Paleozoic Sedimentary Facies Favorable

This paper summarizes the progress and the trend forsedimentology, sequence stratigraphy,reservoir sedimentology and geology of petroleum and the data of former study to analyze the depositional system and the evolutionary rules. In the mean time, we analyze the pattern of the favorablesedimentarymicrofacie which we find by production and texting data. In this way, we can provide evidence for the distribution regularity of nature gas and the prediction and selection for exploration target.Based on the data of the former study, we use the guide bed to divide the upper Paleozoic into4sequence sets, there are Benxi, Taiyuan Formation, Shanxi Formation and Shihezi Formation.By analyzing the date of palaeogeomorphology, palaeocurrent, light mineral, cathodeluminescence and rare earth element, we believe that the provenance of BenxiFormation is from the northeastern of the basin, and the provenance of Taiyuan Formationis from the southeastern of the basin. As for Shanxi and Shihezi Formation, we believe that the provenanceis from the north. And all of this provenanceare mainly comes from la shan-yinshan ancient land.Using all the data above, we believe the sedimentary facie that Shanxi and Shihezi Formation have is fluvial facie. And the Benxi, Taiyuan Formation would be fan delta facie and tidal flat facie.BenxiFormation mainly developstidal flat facie, and in the southeastern of this formation it becomelagoonal facie. The favorable sedimentary facie is scattered distribution.Taiyuan Formationmainly developsfan deltaand tidal flat facie, the favorable sedimentary facie isalso scattered distribution.Shanxi Formationmainly developsmeandering fluvial facie, it has a lot of point-bar deposits. As for Shihezi Formation, it is fluvial facie, and only a little of point-bar deposits are developed in here.