Characteristics Research Of Ordovician Reservoir In Aiding Area Of TaHe Oilfield

Ordovician carbonate reservoir in TaHe oilfield of reservoir consists of ancient tectonic movement and the joint role in the formation of karst reservoir to sew the complex reservoirs mainly hole. As China petrochemical resource strategy to the west transfer, TaHe oilfield ushered in the rare rapid development opportunity period, The innovation development of heavy oil in Twelve Area with million tons of condensate oil reserves of light and reservoir exploration breakthroughs in Tuoputai, gradually to "thousand DWT" big oil field goal. However, in gram coolers raised the west slope and southeastern slope develop have carboniferous Ba Chu group of the lower strata anointed MPCD Ordovician carbonate reservoirs reservoiring and later the damage to the control function of accumulation in the research is not clear, give TaHe oilfield Ordovician carbonate salt reservoirs under the exploration and development brought great difficulties.AiDing area of TaHe oilfield of Ordovician reservoir development has grainstone (including light crystal grain limestone and clay microcrystalline grainstone), mud microcrystalline limestone (including granular clay microcrystalline limestone), including cloud limestone, biological crumbs limestone, algal limestone, karst rock binder, among them with grain limestone and clay microcrystalline limestone as the main lithology. Research area main development pore, cracking and caves of the three categories of reservoir space, reservoir space type may be divided into one or crack for fracture-vuggy fracture-vuggy reservoir (Ⅰtype), holes - fracture type or crack - pore-cave reservoirs (Ⅱtype), fractured-vuggy reservoir (Ⅲtype) three types.In the full predecessors’ seam hole about carbonate reservoir research achievements of type selection, on the basis of the paper presents the prestack time migration, average amplitude variation and coherence technique of study area reservoir development situation is forecasted and further evaluation confirmed that several prediction technology looking for salt Ordovician reservoir under the reliability. The thesis combines earthquake, drilling, logging, logging, and other relevant documents of TaHe oilfield under western salt of Ordovician reservoir is lithology, reservoir space and types, characteristics of physical properties are studied, and combining the actual TaHe oilfield exploration and development of several common, chose the reservoir prediction method for further exploration and development of laid a foundation.Research in this paper collected more than 40 mouth drilling try oil material, further specify the area studied strata fluid properties and crude oil viscosity, density, crude oil containing wax quantity and sweet and plane distribution of hydrogen sulphide levels. In combination with regional geological research, think dining area is an important early Hercynian hydrocarbon accumulation period, and the late Hercynian oil-gas accumulation is also an important period of Yan Shan period, a print teams in the study area hydrocarbon-charging southern also have quite a contribution. The thesis combines try oil under research achievements, the paper puts forward salt Ordovician carbonate reservoir forming patterns.Reservoir flow unit as reveal reservoir heterogeneity important means by this concept, this paper extends to the clastic reservoir in the carbonate reservoir, has been clear about the reservoir flow unit of recognition methods, and completed the study area below 0-60m T74 interface within the scope of the reservoir for next step flow unit of exploration and development of the well provide more accurate basis.