Spatial Distribution Characteristic Of Fluid Potential And The Effect For The Reservoir In The End Of Gujin System Of Yingmaili Area

Yingmaili area lies in the north of Tarim basin, and is a typical oil-rich sag, which is found commercial oil flow in Cambrian, Ordovician, Silurian and lower Tertiary (Gujin).Yingmaili area goes through caledonian movement, hercynian, indosinian movement, Yanshan movement and himalayan movement, and structure is very complicated. On the other hand, oil and gas have the convergence characters of marine facies and land facies, and is enormous complexity. On the basis of regional geology study, this paper challenges the traditional flow potential algorithm, and puts the capillary force into flow potential. Restoring ancient porosity, ancient buried depth, ancient pressure and flow density, introduce the means of restoring each parameters. The spatial distribution characters of flow potential represent that high potential distributes northwest, and the flow potential in tectonic zone is very low. The reservoirs which are found much lie in relative low potential, and Ym32 well area and Ym7 area always lie in low flow potential, which is correspondence with the laws of the objective and lays the foundation for predicting the advantageous reservoir position and direction.The results form predecessors suggest that YML area has three types crude oil.â… crude oil distributes in the east of front uplift belt, and the lies in the Yangxie depression.â…¡crude oil mainly distributes Ym7 structure in Yaha structure zone in the middle of front uplift belt and Yangtake structure.â…¢crude oil is represented by crude oil in Ym1 and Ym2 well. This paper studies the influencing factor, for example, reservoir translocation system, fault profile and unconformity for paleofluid migration, and hydrocarbon migration using the concentration changes of containing nitrogen compound, petromod hydrocarbon migration simulation of 2D and 3D.This paper makes the 2D and 3D simulation for Gujin hydrocarbon accumulation for Ym32 well area on condition that premises authigenic reservoir. The results show that oil is migrated by faults and unconformities, forms reservoir in Gujin formation and Kapushaliang, and this area exists mixed sources, but is not high evolved marine facies light oil or condensate but normal crude oil.Reservoir mainly distributes in relative lower flow potential, but exists in the high flow potential from the palae-fluid potential field and oil and gas reservoir distribution of the end of Gujin. Structural reservoir migrates from high flow potential to low flow potential under the potential difference, for example, Ym7 well area oil reservoir. Lithologic reservoir is not only influenced by flow potential, but also by sandstone distribution, and accumulation law is so complex that higher potential and flow potential can be accumulated. In addition, the area which has traps is easy to forming-reservoir in the oil-gas migration relative active region that translates from high flow potential to low flow potential because of the potential difference. These reservoirs includes structure, structure lithologic and stratigraphic reservoir.